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/*
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* Tiny Code Generator for QEMU
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*
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* Copyright (c) 2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/* define it to use liveness analysis (better code) */
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#define USE_LIVENESS_ANALYSIS
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#include "config.h" |
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#if !defined(CONFIG_DEBUG_TCG) && !defined(NDEBUG)
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/* define it to suppress various consistency checks (faster) */
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#define NDEBUG
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#endif
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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#ifdef _WIN32
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#include <malloc.h> |
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#endif
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#ifdef _AIX
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#include <alloca.h> |
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#endif
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#include "qemu-common.h" |
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#include "cache-utils.h" |
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#include "host-utils.h" |
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#include "qemu-timer.h" |
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/* Note: the long term plan is to reduce the dependancies on the QEMU
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CPU definitions. Currently they are used for qemu_ld/st
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instructions */
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#define NO_CPU_IO_DEFS
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#include "cpu.h" |
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#include "exec-all.h" |
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#include "tcg-op.h" |
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#include "elf.h" |
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#if defined(CONFIG_USE_GUEST_BASE) && !defined(TCG_TARGET_HAS_GUEST_BASE)
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#error GUEST_BASE not supported on this host.
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#endif
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static void tcg_target_init(TCGContext *s); |
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static void tcg_target_qemu_prologue(TCGContext *s); |
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static void patch_reloc(uint8_t *code_ptr, int type, |
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tcg_target_long value, tcg_target_long addend); |
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static TCGOpDef tcg_op_defs[] = {
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#define DEF(s, oargs, iargs, cargs, flags) { #s, oargs, iargs, cargs, iargs + oargs + cargs, flags }, |
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#include "tcg-opc.h" |
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#undef DEF
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}; |
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static TCGRegSet tcg_target_available_regs[2]; |
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static TCGRegSet tcg_target_call_clobber_regs;
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/* XXX: move that inside the context */
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uint16_t *gen_opc_ptr; |
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TCGArg *gen_opparam_ptr; |
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static inline void tcg_out8(TCGContext *s, uint8_t v) |
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{ |
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*s->code_ptr++ = v; |
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} |
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static inline void tcg_out16(TCGContext *s, uint16_t v) |
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{ |
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*(uint16_t *)s->code_ptr = v; |
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s->code_ptr += 2;
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} |
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static inline void tcg_out32(TCGContext *s, uint32_t v) |
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{ |
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*(uint32_t *)s->code_ptr = v; |
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s->code_ptr += 4;
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} |
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/* label relocation processing */
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static void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type, |
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int label_index, long addend) |
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{ |
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TCGLabel *l; |
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TCGRelocation *r; |
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l = &s->labels[label_index]; |
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if (l->has_value) {
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/* FIXME: This may break relocations on RISC targets that
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modify instruction fields in place. The caller may not have
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written the initial value. */
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patch_reloc(code_ptr, type, l->u.value, addend); |
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} else {
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/* add a new relocation entry */
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r = tcg_malloc(sizeof(TCGRelocation));
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r->type = type; |
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r->ptr = code_ptr; |
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r->addend = addend; |
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r->next = l->u.first_reloc; |
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l->u.first_reloc = r; |
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} |
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} |
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static void tcg_out_label(TCGContext *s, int label_index, |
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tcg_target_long value) |
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{ |
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TCGLabel *l; |
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TCGRelocation *r; |
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l = &s->labels[label_index]; |
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if (l->has_value)
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tcg_abort(); |
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r = l->u.first_reloc; |
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while (r != NULL) { |
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patch_reloc(r->ptr, r->type, value, r->addend); |
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r = r->next; |
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} |
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l->has_value = 1;
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l->u.value = value; |
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} |
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int gen_new_label(void) |
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{ |
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TCGContext *s = &tcg_ctx; |
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int idx;
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TCGLabel *l; |
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if (s->nb_labels >= TCG_MAX_LABELS)
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tcg_abort(); |
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idx = s->nb_labels++; |
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l = &s->labels[idx]; |
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l->has_value = 0;
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l->u.first_reloc = NULL;
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return idx;
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} |
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#include "tcg-target.c" |
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/* pool based memory allocation */
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void *tcg_malloc_internal(TCGContext *s, int size) |
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{ |
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TCGPool *p; |
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int pool_size;
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if (size > TCG_POOL_CHUNK_SIZE) {
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/* big malloc: insert a new pool (XXX: could optimize) */
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p = qemu_malloc(sizeof(TCGPool) + size);
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p->size = size; |
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if (s->pool_current)
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s->pool_current->next = p; |
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else
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s->pool_first = p; |
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p->next = s->pool_current; |
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} else {
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p = s->pool_current; |
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if (!p) {
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p = s->pool_first; |
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if (!p)
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goto new_pool;
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} else {
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if (!p->next) {
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new_pool:
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pool_size = TCG_POOL_CHUNK_SIZE; |
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p = qemu_malloc(sizeof(TCGPool) + pool_size);
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p->size = pool_size; |
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p->next = NULL;
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if (s->pool_current)
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s->pool_current->next = p; |
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else
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s->pool_first = p; |
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} else {
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p = p->next; |
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} |
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} |
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} |
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s->pool_current = p; |
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s->pool_cur = p->data + size; |
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s->pool_end = p->data + p->size; |
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return p->data;
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} |
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void tcg_pool_reset(TCGContext *s)
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{ |
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s->pool_cur = s->pool_end = NULL;
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s->pool_current = NULL;
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} |
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void tcg_context_init(TCGContext *s)
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{ |
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int op, total_args, n;
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TCGOpDef *def; |
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TCGArgConstraint *args_ct; |
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int *sorted_args;
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memset(s, 0, sizeof(*s)); |
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s->temps = s->static_temps; |
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s->nb_globals = 0;
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/* Count total number of arguments and allocate the corresponding
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space */
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total_args = 0;
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for(op = 0; op < NB_OPS; op++) { |
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def = &tcg_op_defs[op]; |
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n = def->nb_iargs + def->nb_oargs; |
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total_args += n; |
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} |
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args_ct = qemu_malloc(sizeof(TCGArgConstraint) * total_args);
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sorted_args = qemu_malloc(sizeof(int) * total_args); |
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for(op = 0; op < NB_OPS; op++) { |
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def = &tcg_op_defs[op]; |
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def->args_ct = args_ct; |
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def->sorted_args = sorted_args; |
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n = def->nb_iargs + def->nb_oargs; |
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sorted_args += n; |
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args_ct += n; |
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} |
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tcg_target_init(s); |
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} |
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void tcg_prologue_init(TCGContext *s)
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{ |
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/* init global prologue and epilogue */
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s->code_buf = code_gen_prologue; |
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s->code_ptr = s->code_buf; |
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tcg_target_qemu_prologue(s); |
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flush_icache_range((unsigned long)s->code_buf, |
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(unsigned long)s->code_ptr); |
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} |
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void tcg_set_frame(TCGContext *s, int reg, |
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tcg_target_long start, tcg_target_long size) |
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{ |
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s->frame_start = start; |
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s->frame_end = start + size; |
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s->frame_reg = reg; |
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} |
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void tcg_func_start(TCGContext *s)
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{ |
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int i;
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tcg_pool_reset(s); |
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s->nb_temps = s->nb_globals; |
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for(i = 0; i < (TCG_TYPE_COUNT * 2); i++) |
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s->first_free_temp[i] = -1;
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s->labels = tcg_malloc(sizeof(TCGLabel) * TCG_MAX_LABELS);
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s->nb_labels = 0;
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s->current_frame_offset = s->frame_start; |
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gen_opc_ptr = gen_opc_buf; |
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gen_opparam_ptr = gen_opparam_buf; |
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} |
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static inline void tcg_temp_alloc(TCGContext *s, int n) |
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{ |
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if (n > TCG_MAX_TEMPS)
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tcg_abort(); |
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} |
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static inline int tcg_global_reg_new_internal(TCGType type, int reg, |
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const char *name) |
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{ |
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TCGContext *s = &tcg_ctx; |
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TCGTemp *ts; |
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int idx;
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#if TCG_TARGET_REG_BITS == 32 |
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if (type != TCG_TYPE_I32)
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tcg_abort(); |
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#endif
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if (tcg_regset_test_reg(s->reserved_regs, reg))
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tcg_abort(); |
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idx = s->nb_globals; |
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tcg_temp_alloc(s, s->nb_globals + 1);
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ts = &s->temps[s->nb_globals]; |
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ts->base_type = type; |
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ts->type = type; |
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ts->fixed_reg = 1;
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ts->reg = reg; |
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ts->name = name; |
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s->nb_globals++; |
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tcg_regset_set_reg(s->reserved_regs, reg); |
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return idx;
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} |
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TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name) |
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{ |
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int idx;
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idx = tcg_global_reg_new_internal(TCG_TYPE_I32, reg, name); |
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return MAKE_TCGV_I32(idx);
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} |
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TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name) |
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{ |
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int idx;
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idx = tcg_global_reg_new_internal(TCG_TYPE_I64, reg, name); |
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return MAKE_TCGV_I64(idx);
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} |
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static inline int tcg_global_mem_new_internal(TCGType type, int reg, |
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tcg_target_long offset, |
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const char *name) |
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{ |
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TCGContext *s = &tcg_ctx; |
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TCGTemp *ts; |
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int idx;
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idx = s->nb_globals; |
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#if TCG_TARGET_REG_BITS == 32 |
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if (type == TCG_TYPE_I64) {
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char buf[64]; |
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tcg_temp_alloc(s, s->nb_globals + 2);
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ts = &s->temps[s->nb_globals]; |
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ts->base_type = type; |
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ts->type = TCG_TYPE_I32; |
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ts->fixed_reg = 0;
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ts->mem_allocated = 1;
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ts->mem_reg = reg; |
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#ifdef TCG_TARGET_WORDS_BIGENDIAN
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ts->mem_offset = offset + 4;
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#else
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ts->mem_offset = offset; |
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#endif
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pstrcpy(buf, sizeof(buf), name);
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pstrcat(buf, sizeof(buf), "_0"); |
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ts->name = strdup(buf); |
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ts++; |
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ts->base_type = type; |
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ts->type = TCG_TYPE_I32; |
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ts->fixed_reg = 0;
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ts->mem_allocated = 1;
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ts->mem_reg = reg; |
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#ifdef TCG_TARGET_WORDS_BIGENDIAN
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ts->mem_offset = offset; |
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#else
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ts->mem_offset = offset + 4;
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#endif
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pstrcpy(buf, sizeof(buf), name);
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pstrcat(buf, sizeof(buf), "_1"); |
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ts->name = strdup(buf); |
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s->nb_globals += 2;
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} else
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#endif
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{ |
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tcg_temp_alloc(s, s->nb_globals + 1);
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ts = &s->temps[s->nb_globals]; |
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ts->base_type = type; |
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ts->type = type; |
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ts->fixed_reg = 0;
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ts->mem_allocated = 1;
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ts->mem_reg = reg; |
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ts->mem_offset = offset; |
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ts->name = name; |
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s->nb_globals++; |
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} |
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return idx;
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} |
386 |
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TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
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const char *name) |
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{ |
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int idx;
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idx = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name); |
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return MAKE_TCGV_I32(idx);
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} |
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TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
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const char *name) |
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{ |
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int idx;
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idx = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name); |
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return MAKE_TCGV_I64(idx);
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} |
404 |
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static inline int tcg_temp_new_internal(TCGType type, int temp_local) |
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{ |
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TCGContext *s = &tcg_ctx; |
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TCGTemp *ts; |
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int idx, k;
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k = type; |
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if (temp_local)
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k += TCG_TYPE_COUNT; |
414 |
idx = s->first_free_temp[k]; |
415 |
if (idx != -1) { |
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/* There is already an available temp with the
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right type */
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ts = &s->temps[idx]; |
419 |
s->first_free_temp[k] = ts->next_free_temp; |
420 |
ts->temp_allocated = 1;
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assert(ts->temp_local == temp_local); |
422 |
} else {
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idx = s->nb_temps; |
424 |
#if TCG_TARGET_REG_BITS == 32 |
425 |
if (type == TCG_TYPE_I64) {
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tcg_temp_alloc(s, s->nb_temps + 2);
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ts = &s->temps[s->nb_temps]; |
428 |
ts->base_type = type; |
429 |
ts->type = TCG_TYPE_I32; |
430 |
ts->temp_allocated = 1;
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ts->temp_local = temp_local; |
432 |
ts->name = NULL;
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ts++; |
434 |
ts->base_type = TCG_TYPE_I32; |
435 |
ts->type = TCG_TYPE_I32; |
436 |
ts->temp_allocated = 1;
|
437 |
ts->temp_local = temp_local; |
438 |
ts->name = NULL;
|
439 |
s->nb_temps += 2;
|
440 |
} else
|
441 |
#endif
|
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{ |
443 |
tcg_temp_alloc(s, s->nb_temps + 1);
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ts = &s->temps[s->nb_temps]; |
445 |
ts->base_type = type; |
446 |
ts->type = type; |
447 |
ts->temp_allocated = 1;
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448 |
ts->temp_local = temp_local; |
449 |
ts->name = NULL;
|
450 |
s->nb_temps++; |
451 |
} |
452 |
} |
453 |
|
454 |
#if defined(CONFIG_DEBUG_TCG)
|
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s->temps_in_use++; |
456 |
#endif
|
457 |
return idx;
|
458 |
} |
459 |
|
460 |
TCGv_i32 tcg_temp_new_internal_i32(int temp_local)
|
461 |
{ |
462 |
int idx;
|
463 |
|
464 |
idx = tcg_temp_new_internal(TCG_TYPE_I32, temp_local); |
465 |
return MAKE_TCGV_I32(idx);
|
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} |
467 |
|
468 |
TCGv_i64 tcg_temp_new_internal_i64(int temp_local)
|
469 |
{ |
470 |
int idx;
|
471 |
|
472 |
idx = tcg_temp_new_internal(TCG_TYPE_I64, temp_local); |
473 |
return MAKE_TCGV_I64(idx);
|
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} |
475 |
|
476 |
static inline void tcg_temp_free_internal(int idx) |
477 |
{ |
478 |
TCGContext *s = &tcg_ctx; |
479 |
TCGTemp *ts; |
480 |
int k;
|
481 |
|
482 |
#if defined(CONFIG_DEBUG_TCG)
|
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s->temps_in_use--; |
484 |
if (s->temps_in_use < 0) { |
485 |
fprintf(stderr, "More temporaries freed than allocated!\n");
|
486 |
} |
487 |
#endif
|
488 |
|
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assert(idx >= s->nb_globals && idx < s->nb_temps); |
490 |
ts = &s->temps[idx]; |
491 |
assert(ts->temp_allocated != 0);
|
492 |
ts->temp_allocated = 0;
|
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k = ts->base_type; |
494 |
if (ts->temp_local)
|
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k += TCG_TYPE_COUNT; |
496 |
ts->next_free_temp = s->first_free_temp[k]; |
497 |
s->first_free_temp[k] = idx; |
498 |
} |
499 |
|
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void tcg_temp_free_i32(TCGv_i32 arg)
|
501 |
{ |
502 |
tcg_temp_free_internal(GET_TCGV_I32(arg)); |
503 |
} |
504 |
|
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void tcg_temp_free_i64(TCGv_i64 arg)
|
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{ |
507 |
tcg_temp_free_internal(GET_TCGV_I64(arg)); |
508 |
} |
509 |
|
510 |
TCGv_i32 tcg_const_i32(int32_t val) |
511 |
{ |
512 |
TCGv_i32 t0; |
513 |
t0 = tcg_temp_new_i32(); |
514 |
tcg_gen_movi_i32(t0, val); |
515 |
return t0;
|
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} |
517 |
|
518 |
TCGv_i64 tcg_const_i64(int64_t val) |
519 |
{ |
520 |
TCGv_i64 t0; |
521 |
t0 = tcg_temp_new_i64(); |
522 |
tcg_gen_movi_i64(t0, val); |
523 |
return t0;
|
524 |
} |
525 |
|
526 |
TCGv_i32 tcg_const_local_i32(int32_t val) |
527 |
{ |
528 |
TCGv_i32 t0; |
529 |
t0 = tcg_temp_local_new_i32(); |
530 |
tcg_gen_movi_i32(t0, val); |
531 |
return t0;
|
532 |
} |
533 |
|
534 |
TCGv_i64 tcg_const_local_i64(int64_t val) |
535 |
{ |
536 |
TCGv_i64 t0; |
537 |
t0 = tcg_temp_local_new_i64(); |
538 |
tcg_gen_movi_i64(t0, val); |
539 |
return t0;
|
540 |
} |
541 |
|
542 |
#if defined(CONFIG_DEBUG_TCG)
|
543 |
void tcg_clear_temp_count(void) |
544 |
{ |
545 |
TCGContext *s = &tcg_ctx; |
546 |
s->temps_in_use = 0;
|
547 |
} |
548 |
|
549 |
int tcg_check_temp_count(void) |
550 |
{ |
551 |
TCGContext *s = &tcg_ctx; |
552 |
if (s->temps_in_use) {
|
553 |
/* Clear the count so that we don't give another
|
554 |
* warning immediately next time around.
|
555 |
*/
|
556 |
s->temps_in_use = 0;
|
557 |
return 1; |
558 |
} |
559 |
return 0; |
560 |
} |
561 |
#endif
|
562 |
|
563 |
void tcg_register_helper(void *func, const char *name) |
564 |
{ |
565 |
TCGContext *s = &tcg_ctx; |
566 |
int n;
|
567 |
if ((s->nb_helpers + 1) > s->allocated_helpers) { |
568 |
n = s->allocated_helpers; |
569 |
if (n == 0) { |
570 |
n = 4;
|
571 |
} else {
|
572 |
n *= 2;
|
573 |
} |
574 |
s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo));
|
575 |
s->allocated_helpers = n; |
576 |
} |
577 |
s->helpers[s->nb_helpers].func = (tcg_target_ulong)func; |
578 |
s->helpers[s->nb_helpers].name = name; |
579 |
s->nb_helpers++; |
580 |
} |
581 |
|
582 |
/* Note: we convert the 64 bit args to 32 bit and do some alignment
|
583 |
and endian swap. Maybe it would be better to do the alignment
|
584 |
and endian swap in tcg_reg_alloc_call(). */
|
585 |
void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags, |
586 |
int sizemask, TCGArg ret, int nargs, TCGArg *args) |
587 |
{ |
588 |
#if defined(TCG_TARGET_I386) && TCG_TARGET_REG_BITS < 64 |
589 |
int call_type;
|
590 |
#endif
|
591 |
int i;
|
592 |
int real_args;
|
593 |
int nb_rets;
|
594 |
TCGArg *nparam; |
595 |
|
596 |
#if defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64 |
597 |
for (i = 0; i < nargs; ++i) { |
598 |
int is_64bit = sizemask & (1 << (i+1)*2); |
599 |
int is_signed = sizemask & (2 << (i+1)*2); |
600 |
if (!is_64bit) {
|
601 |
TCGv_i64 temp = tcg_temp_new_i64(); |
602 |
TCGv_i64 orig = MAKE_TCGV_I64(args[i]); |
603 |
if (is_signed) {
|
604 |
tcg_gen_ext32s_i64(temp, orig); |
605 |
} else {
|
606 |
tcg_gen_ext32u_i64(temp, orig); |
607 |
} |
608 |
args[i] = GET_TCGV_I64(temp); |
609 |
} |
610 |
} |
611 |
#endif /* TCG_TARGET_EXTEND_ARGS */ |
612 |
|
613 |
*gen_opc_ptr++ = INDEX_op_call; |
614 |
nparam = gen_opparam_ptr++; |
615 |
#if defined(TCG_TARGET_I386) && TCG_TARGET_REG_BITS < 64 |
616 |
call_type = (flags & TCG_CALL_TYPE_MASK); |
617 |
#endif
|
618 |
if (ret != TCG_CALL_DUMMY_ARG) {
|
619 |
#if TCG_TARGET_REG_BITS < 64 |
620 |
if (sizemask & 1) { |
621 |
#ifdef TCG_TARGET_WORDS_BIGENDIAN
|
622 |
*gen_opparam_ptr++ = ret + 1;
|
623 |
*gen_opparam_ptr++ = ret; |
624 |
#else
|
625 |
*gen_opparam_ptr++ = ret; |
626 |
*gen_opparam_ptr++ = ret + 1;
|
627 |
#endif
|
628 |
nb_rets = 2;
|
629 |
} else
|
630 |
#endif
|
631 |
{ |
632 |
*gen_opparam_ptr++ = ret; |
633 |
nb_rets = 1;
|
634 |
} |
635 |
} else {
|
636 |
nb_rets = 0;
|
637 |
} |
638 |
real_args = 0;
|
639 |
for (i = 0; i < nargs; i++) { |
640 |
#if TCG_TARGET_REG_BITS < 64 |
641 |
int is_64bit = sizemask & (1 << (i+1)*2); |
642 |
if (is_64bit) {
|
643 |
#ifdef TCG_TARGET_I386
|
644 |
/* REGPARM case: if the third parameter is 64 bit, it is
|
645 |
allocated on the stack */
|
646 |
if (i == 2 && call_type == TCG_CALL_TYPE_REGPARM) { |
647 |
call_type = TCG_CALL_TYPE_REGPARM_2; |
648 |
flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type; |
649 |
} |
650 |
#endif
|
651 |
#ifdef TCG_TARGET_CALL_ALIGN_ARGS
|
652 |
/* some targets want aligned 64 bit args */
|
653 |
if (real_args & 1) { |
654 |
*gen_opparam_ptr++ = TCG_CALL_DUMMY_ARG; |
655 |
real_args++; |
656 |
} |
657 |
#endif
|
658 |
/* If stack grows up, then we will be placing successive
|
659 |
arguments at lower addresses, which means we need to
|
660 |
reverse the order compared to how we would normally
|
661 |
treat either big or little-endian. For those arguments
|
662 |
that will wind up in registers, this still works for
|
663 |
HPPA (the only current STACK_GROWSUP target) since the
|
664 |
argument registers are *also* allocated in decreasing
|
665 |
order. If another such target is added, this logic may
|
666 |
have to get more complicated to differentiate between
|
667 |
stack arguments and register arguments. */
|
668 |
#if defined(TCG_TARGET_WORDS_BIGENDIAN) != defined(TCG_TARGET_STACK_GROWSUP)
|
669 |
*gen_opparam_ptr++ = args[i] + 1;
|
670 |
*gen_opparam_ptr++ = args[i]; |
671 |
#else
|
672 |
*gen_opparam_ptr++ = args[i]; |
673 |
*gen_opparam_ptr++ = args[i] + 1;
|
674 |
#endif
|
675 |
real_args += 2;
|
676 |
continue;
|
677 |
} |
678 |
#endif /* TCG_TARGET_REG_BITS < 64 */ |
679 |
|
680 |
*gen_opparam_ptr++ = args[i]; |
681 |
real_args++; |
682 |
} |
683 |
*gen_opparam_ptr++ = GET_TCGV_PTR(func); |
684 |
|
685 |
*gen_opparam_ptr++ = flags; |
686 |
|
687 |
*nparam = (nb_rets << 16) | (real_args + 1); |
688 |
|
689 |
/* total parameters, needed to go backward in the instruction stream */
|
690 |
*gen_opparam_ptr++ = 1 + nb_rets + real_args + 3; |
691 |
|
692 |
#if defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64 |
693 |
for (i = 0; i < nargs; ++i) { |
694 |
int is_64bit = sizemask & (1 << (i+1)*2); |
695 |
if (!is_64bit) {
|
696 |
TCGv_i64 temp = MAKE_TCGV_I64(args[i]); |
697 |
tcg_temp_free_i64(temp); |
698 |
} |
699 |
} |
700 |
#endif /* TCG_TARGET_EXTEND_ARGS */ |
701 |
} |
702 |
|
703 |
#if TCG_TARGET_REG_BITS == 32 |
704 |
void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
|
705 |
int c, int right, int arith) |
706 |
{ |
707 |
if (c == 0) { |
708 |
tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg1)); |
709 |
tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1)); |
710 |
} else if (c >= 32) { |
711 |
c -= 32;
|
712 |
if (right) {
|
713 |
if (arith) {
|
714 |
tcg_gen_sari_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c); |
715 |
tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
|
716 |
} else {
|
717 |
tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c); |
718 |
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
|
719 |
} |
720 |
} else {
|
721 |
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_LOW(arg1), c); |
722 |
tcg_gen_movi_i32(TCGV_LOW(ret), 0);
|
723 |
} |
724 |
} else {
|
725 |
TCGv_i32 t0, t1; |
726 |
|
727 |
t0 = tcg_temp_new_i32(); |
728 |
t1 = tcg_temp_new_i32(); |
729 |
if (right) {
|
730 |
tcg_gen_shli_i32(t0, TCGV_HIGH(arg1), 32 - c);
|
731 |
if (arith)
|
732 |
tcg_gen_sari_i32(t1, TCGV_HIGH(arg1), c); |
733 |
else
|
734 |
tcg_gen_shri_i32(t1, TCGV_HIGH(arg1), c); |
735 |
tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_LOW(arg1), c); |
736 |
tcg_gen_or_i32(TCGV_LOW(ret), TCGV_LOW(ret), t0); |
737 |
tcg_gen_mov_i32(TCGV_HIGH(ret), t1); |
738 |
} else {
|
739 |
tcg_gen_shri_i32(t0, TCGV_LOW(arg1), 32 - c);
|
740 |
/* Note: ret can be the same as arg1, so we use t1 */
|
741 |
tcg_gen_shli_i32(t1, TCGV_LOW(arg1), c); |
742 |
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c); |
743 |
tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t0); |
744 |
tcg_gen_mov_i32(TCGV_LOW(ret), t1); |
745 |
} |
746 |
tcg_temp_free_i32(t0); |
747 |
tcg_temp_free_i32(t1); |
748 |
} |
749 |
} |
750 |
#endif
|
751 |
|
752 |
|
753 |
static void tcg_reg_alloc_start(TCGContext *s) |
754 |
{ |
755 |
int i;
|
756 |
TCGTemp *ts; |
757 |
for(i = 0; i < s->nb_globals; i++) { |
758 |
ts = &s->temps[i]; |
759 |
if (ts->fixed_reg) {
|
760 |
ts->val_type = TEMP_VAL_REG; |
761 |
} else {
|
762 |
ts->val_type = TEMP_VAL_MEM; |
763 |
} |
764 |
} |
765 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
766 |
ts = &s->temps[i]; |
767 |
ts->val_type = TEMP_VAL_DEAD; |
768 |
ts->mem_allocated = 0;
|
769 |
ts->fixed_reg = 0;
|
770 |
} |
771 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
772 |
s->reg_to_temp[i] = -1;
|
773 |
} |
774 |
} |
775 |
|
776 |
static char *tcg_get_arg_str_idx(TCGContext *s, char *buf, int buf_size, |
777 |
int idx)
|
778 |
{ |
779 |
TCGTemp *ts; |
780 |
|
781 |
ts = &s->temps[idx]; |
782 |
if (idx < s->nb_globals) {
|
783 |
pstrcpy(buf, buf_size, ts->name); |
784 |
} else {
|
785 |
if (ts->temp_local)
|
786 |
snprintf(buf, buf_size, "loc%d", idx - s->nb_globals);
|
787 |
else
|
788 |
snprintf(buf, buf_size, "tmp%d", idx - s->nb_globals);
|
789 |
} |
790 |
return buf;
|
791 |
} |
792 |
|
793 |
char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg) |
794 |
{ |
795 |
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I32(arg));
|
796 |
} |
797 |
|
798 |
char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg) |
799 |
{ |
800 |
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I64(arg));
|
801 |
} |
802 |
|
803 |
static int helper_cmp(const void *p1, const void *p2) |
804 |
{ |
805 |
const TCGHelperInfo *th1 = p1;
|
806 |
const TCGHelperInfo *th2 = p2;
|
807 |
if (th1->func < th2->func)
|
808 |
return -1; |
809 |
else if (th1->func == th2->func) |
810 |
return 0; |
811 |
else
|
812 |
return 1; |
813 |
} |
814 |
|
815 |
/* find helper definition (Note: A hash table would be better) */
|
816 |
static TCGHelperInfo *tcg_find_helper(TCGContext *s, tcg_target_ulong val)
|
817 |
{ |
818 |
int m, m_min, m_max;
|
819 |
TCGHelperInfo *th; |
820 |
tcg_target_ulong v; |
821 |
|
822 |
if (unlikely(!s->helpers_sorted)) {
|
823 |
qsort(s->helpers, s->nb_helpers, sizeof(TCGHelperInfo),
|
824 |
helper_cmp); |
825 |
s->helpers_sorted = 1;
|
826 |
} |
827 |
|
828 |
/* binary search */
|
829 |
m_min = 0;
|
830 |
m_max = s->nb_helpers - 1;
|
831 |
while (m_min <= m_max) {
|
832 |
m = (m_min + m_max) >> 1;
|
833 |
th = &s->helpers[m]; |
834 |
v = th->func; |
835 |
if (v == val)
|
836 |
return th;
|
837 |
else if (val < v) { |
838 |
m_max = m - 1;
|
839 |
} else {
|
840 |
m_min = m + 1;
|
841 |
} |
842 |
} |
843 |
return NULL; |
844 |
} |
845 |
|
846 |
static const char * const cond_name[] = |
847 |
{ |
848 |
[TCG_COND_EQ] = "eq",
|
849 |
[TCG_COND_NE] = "ne",
|
850 |
[TCG_COND_LT] = "lt",
|
851 |
[TCG_COND_GE] = "ge",
|
852 |
[TCG_COND_LE] = "le",
|
853 |
[TCG_COND_GT] = "gt",
|
854 |
[TCG_COND_LTU] = "ltu",
|
855 |
[TCG_COND_GEU] = "geu",
|
856 |
[TCG_COND_LEU] = "leu",
|
857 |
[TCG_COND_GTU] = "gtu"
|
858 |
}; |
859 |
|
860 |
void tcg_dump_ops(TCGContext *s, FILE *outfile)
|
861 |
{ |
862 |
const uint16_t *opc_ptr;
|
863 |
const TCGArg *args;
|
864 |
TCGArg arg; |
865 |
TCGOpcode c; |
866 |
int i, k, nb_oargs, nb_iargs, nb_cargs, first_insn;
|
867 |
const TCGOpDef *def;
|
868 |
char buf[128]; |
869 |
|
870 |
first_insn = 1;
|
871 |
opc_ptr = gen_opc_buf; |
872 |
args = gen_opparam_buf; |
873 |
while (opc_ptr < gen_opc_ptr) {
|
874 |
c = *opc_ptr++; |
875 |
def = &tcg_op_defs[c]; |
876 |
if (c == INDEX_op_debug_insn_start) {
|
877 |
uint64_t pc; |
878 |
#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
|
879 |
pc = ((uint64_t)args[1] << 32) | args[0]; |
880 |
#else
|
881 |
pc = args[0];
|
882 |
#endif
|
883 |
if (!first_insn)
|
884 |
fprintf(outfile, "\n");
|
885 |
fprintf(outfile, " ---- 0x%" PRIx64, pc);
|
886 |
first_insn = 0;
|
887 |
nb_oargs = def->nb_oargs; |
888 |
nb_iargs = def->nb_iargs; |
889 |
nb_cargs = def->nb_cargs; |
890 |
} else if (c == INDEX_op_call) { |
891 |
TCGArg arg; |
892 |
|
893 |
/* variable number of arguments */
|
894 |
arg = *args++; |
895 |
nb_oargs = arg >> 16;
|
896 |
nb_iargs = arg & 0xffff;
|
897 |
nb_cargs = def->nb_cargs; |
898 |
|
899 |
fprintf(outfile, " %s ", def->name);
|
900 |
|
901 |
/* function name */
|
902 |
fprintf(outfile, "%s",
|
903 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + nb_iargs - 1])); |
904 |
/* flags */
|
905 |
fprintf(outfile, ",$0x%" TCG_PRIlx,
|
906 |
args[nb_oargs + nb_iargs]); |
907 |
/* nb out args */
|
908 |
fprintf(outfile, ",$%d", nb_oargs);
|
909 |
for(i = 0; i < nb_oargs; i++) { |
910 |
fprintf(outfile, ",");
|
911 |
fprintf(outfile, "%s",
|
912 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[i]));
|
913 |
} |
914 |
for(i = 0; i < (nb_iargs - 1); i++) { |
915 |
fprintf(outfile, ",");
|
916 |
if (args[nb_oargs + i] == TCG_CALL_DUMMY_ARG) {
|
917 |
fprintf(outfile, "<dummy>");
|
918 |
} else {
|
919 |
fprintf(outfile, "%s",
|
920 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + i]));
|
921 |
} |
922 |
} |
923 |
} else if (c == INDEX_op_movi_i32 |
924 |
#if TCG_TARGET_REG_BITS == 64 |
925 |
|| c == INDEX_op_movi_i64 |
926 |
#endif
|
927 |
) { |
928 |
tcg_target_ulong val; |
929 |
TCGHelperInfo *th; |
930 |
|
931 |
nb_oargs = def->nb_oargs; |
932 |
nb_iargs = def->nb_iargs; |
933 |
nb_cargs = def->nb_cargs; |
934 |
fprintf(outfile, " %s %s,$", def->name,
|
935 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[0])); |
936 |
val = args[1];
|
937 |
th = tcg_find_helper(s, val); |
938 |
if (th) {
|
939 |
fprintf(outfile, "%s", th->name);
|
940 |
} else {
|
941 |
if (c == INDEX_op_movi_i32)
|
942 |
fprintf(outfile, "0x%x", (uint32_t)val);
|
943 |
else
|
944 |
fprintf(outfile, "0x%" PRIx64 , (uint64_t)val);
|
945 |
} |
946 |
} else {
|
947 |
fprintf(outfile, " %s ", def->name);
|
948 |
if (c == INDEX_op_nopn) {
|
949 |
/* variable number of arguments */
|
950 |
nb_cargs = *args; |
951 |
nb_oargs = 0;
|
952 |
nb_iargs = 0;
|
953 |
} else {
|
954 |
nb_oargs = def->nb_oargs; |
955 |
nb_iargs = def->nb_iargs; |
956 |
nb_cargs = def->nb_cargs; |
957 |
} |
958 |
|
959 |
k = 0;
|
960 |
for(i = 0; i < nb_oargs; i++) { |
961 |
if (k != 0) |
962 |
fprintf(outfile, ",");
|
963 |
fprintf(outfile, "%s",
|
964 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
965 |
} |
966 |
for(i = 0; i < nb_iargs; i++) { |
967 |
if (k != 0) |
968 |
fprintf(outfile, ",");
|
969 |
fprintf(outfile, "%s",
|
970 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
971 |
} |
972 |
switch (c) {
|
973 |
case INDEX_op_brcond_i32:
|
974 |
#if TCG_TARGET_REG_BITS == 32 |
975 |
case INDEX_op_brcond2_i32:
|
976 |
#elif TCG_TARGET_REG_BITS == 64 |
977 |
case INDEX_op_brcond_i64:
|
978 |
#endif
|
979 |
case INDEX_op_setcond_i32:
|
980 |
#if TCG_TARGET_REG_BITS == 32 |
981 |
case INDEX_op_setcond2_i32:
|
982 |
#elif TCG_TARGET_REG_BITS == 64 |
983 |
case INDEX_op_setcond_i64:
|
984 |
#endif
|
985 |
if (args[k] < ARRAY_SIZE(cond_name) && cond_name[args[k]])
|
986 |
fprintf(outfile, ",%s", cond_name[args[k++]]);
|
987 |
else
|
988 |
fprintf(outfile, ",$0x%" TCG_PRIlx, args[k++]);
|
989 |
i = 1;
|
990 |
break;
|
991 |
default:
|
992 |
i = 0;
|
993 |
break;
|
994 |
} |
995 |
for(; i < nb_cargs; i++) {
|
996 |
if (k != 0) |
997 |
fprintf(outfile, ",");
|
998 |
arg = args[k++]; |
999 |
fprintf(outfile, "$0x%" TCG_PRIlx, arg);
|
1000 |
} |
1001 |
} |
1002 |
fprintf(outfile, "\n");
|
1003 |
args += nb_iargs + nb_oargs + nb_cargs; |
1004 |
} |
1005 |
} |
1006 |
|
1007 |
/* we give more priority to constraints with less registers */
|
1008 |
static int get_constraint_priority(const TCGOpDef *def, int k) |
1009 |
{ |
1010 |
const TCGArgConstraint *arg_ct;
|
1011 |
|
1012 |
int i, n;
|
1013 |
arg_ct = &def->args_ct[k]; |
1014 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
1015 |
/* an alias is equivalent to a single register */
|
1016 |
n = 1;
|
1017 |
} else {
|
1018 |
if (!(arg_ct->ct & TCG_CT_REG))
|
1019 |
return 0; |
1020 |
n = 0;
|
1021 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
1022 |
if (tcg_regset_test_reg(arg_ct->u.regs, i))
|
1023 |
n++; |
1024 |
} |
1025 |
} |
1026 |
return TCG_TARGET_NB_REGS - n + 1; |
1027 |
} |
1028 |
|
1029 |
/* sort from highest priority to lowest */
|
1030 |
static void sort_constraints(TCGOpDef *def, int start, int n) |
1031 |
{ |
1032 |
int i, j, p1, p2, tmp;
|
1033 |
|
1034 |
for(i = 0; i < n; i++) |
1035 |
def->sorted_args[start + i] = start + i; |
1036 |
if (n <= 1) |
1037 |
return;
|
1038 |
for(i = 0; i < n - 1; i++) { |
1039 |
for(j = i + 1; j < n; j++) { |
1040 |
p1 = get_constraint_priority(def, def->sorted_args[start + i]); |
1041 |
p2 = get_constraint_priority(def, def->sorted_args[start + j]); |
1042 |
if (p1 < p2) {
|
1043 |
tmp = def->sorted_args[start + i]; |
1044 |
def->sorted_args[start + i] = def->sorted_args[start + j]; |
1045 |
def->sorted_args[start + j] = tmp; |
1046 |
} |
1047 |
} |
1048 |
} |
1049 |
} |
1050 |
|
1051 |
void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs) |
1052 |
{ |
1053 |
TCGOpcode op; |
1054 |
TCGOpDef *def; |
1055 |
const char *ct_str; |
1056 |
int i, nb_args;
|
1057 |
|
1058 |
for(;;) {
|
1059 |
if (tdefs->op == (TCGOpcode)-1) |
1060 |
break;
|
1061 |
op = tdefs->op; |
1062 |
assert((unsigned)op < NB_OPS);
|
1063 |
def = &tcg_op_defs[op]; |
1064 |
#if defined(CONFIG_DEBUG_TCG)
|
1065 |
/* Duplicate entry in op definitions? */
|
1066 |
assert(!def->used); |
1067 |
def->used = 1;
|
1068 |
#endif
|
1069 |
nb_args = def->nb_iargs + def->nb_oargs; |
1070 |
for(i = 0; i < nb_args; i++) { |
1071 |
ct_str = tdefs->args_ct_str[i]; |
1072 |
/* Incomplete TCGTargetOpDef entry? */
|
1073 |
assert(ct_str != NULL);
|
1074 |
tcg_regset_clear(def->args_ct[i].u.regs); |
1075 |
def->args_ct[i].ct = 0;
|
1076 |
if (ct_str[0] >= '0' && ct_str[0] <= '9') { |
1077 |
int oarg;
|
1078 |
oarg = ct_str[0] - '0'; |
1079 |
assert(oarg < def->nb_oargs); |
1080 |
assert(def->args_ct[oarg].ct & TCG_CT_REG); |
1081 |
/* TCG_CT_ALIAS is for the output arguments. The input
|
1082 |
argument is tagged with TCG_CT_IALIAS. */
|
1083 |
def->args_ct[i] = def->args_ct[oarg]; |
1084 |
def->args_ct[oarg].ct = TCG_CT_ALIAS; |
1085 |
def->args_ct[oarg].alias_index = i; |
1086 |
def->args_ct[i].ct |= TCG_CT_IALIAS; |
1087 |
def->args_ct[i].alias_index = oarg; |
1088 |
} else {
|
1089 |
for(;;) {
|
1090 |
if (*ct_str == '\0') |
1091 |
break;
|
1092 |
switch(*ct_str) {
|
1093 |
case 'i': |
1094 |
def->args_ct[i].ct |= TCG_CT_CONST; |
1095 |
ct_str++; |
1096 |
break;
|
1097 |
default:
|
1098 |
if (target_parse_constraint(&def->args_ct[i], &ct_str) < 0) { |
1099 |
fprintf(stderr, "Invalid constraint '%s' for arg %d of operation '%s'\n",
|
1100 |
ct_str, i, def->name); |
1101 |
exit(1);
|
1102 |
} |
1103 |
} |
1104 |
} |
1105 |
} |
1106 |
} |
1107 |
|
1108 |
/* TCGTargetOpDef entry with too much information? */
|
1109 |
assert(i == TCG_MAX_OP_ARGS || tdefs->args_ct_str[i] == NULL);
|
1110 |
|
1111 |
/* sort the constraints (XXX: this is just an heuristic) */
|
1112 |
sort_constraints(def, 0, def->nb_oargs);
|
1113 |
sort_constraints(def, def->nb_oargs, def->nb_iargs); |
1114 |
|
1115 |
#if 0
|
1116 |
{
|
1117 |
int i;
|
1118 |
|
1119 |
printf("%s: sorted=", def->name);
|
1120 |
for(i = 0; i < def->nb_oargs + def->nb_iargs; i++)
|
1121 |
printf(" %d", def->sorted_args[i]);
|
1122 |
printf("\n");
|
1123 |
}
|
1124 |
#endif
|
1125 |
tdefs++; |
1126 |
} |
1127 |
|
1128 |
#if defined(CONFIG_DEBUG_TCG)
|
1129 |
i = 0;
|
1130 |
for (op = 0; op < ARRAY_SIZE(tcg_op_defs); op++) { |
1131 |
if (op < INDEX_op_call || op == INDEX_op_debug_insn_start) {
|
1132 |
/* Wrong entry in op definitions? */
|
1133 |
if (tcg_op_defs[op].used) {
|
1134 |
fprintf(stderr, "Invalid op definition for %s\n",
|
1135 |
tcg_op_defs[op].name); |
1136 |
i = 1;
|
1137 |
} |
1138 |
} else {
|
1139 |
/* Missing entry in op definitions? */
|
1140 |
if (!tcg_op_defs[op].used) {
|
1141 |
fprintf(stderr, "Missing op definition for %s\n",
|
1142 |
tcg_op_defs[op].name); |
1143 |
i = 1;
|
1144 |
} |
1145 |
} |
1146 |
} |
1147 |
if (i == 1) { |
1148 |
tcg_abort(); |
1149 |
} |
1150 |
#endif
|
1151 |
} |
1152 |
|
1153 |
#ifdef USE_LIVENESS_ANALYSIS
|
1154 |
|
1155 |
/* set a nop for an operation using 'nb_args' */
|
1156 |
static inline void tcg_set_nop(TCGContext *s, uint16_t *opc_ptr, |
1157 |
TCGArg *args, int nb_args)
|
1158 |
{ |
1159 |
if (nb_args == 0) { |
1160 |
*opc_ptr = INDEX_op_nop; |
1161 |
} else {
|
1162 |
*opc_ptr = INDEX_op_nopn; |
1163 |
args[0] = nb_args;
|
1164 |
args[nb_args - 1] = nb_args;
|
1165 |
} |
1166 |
} |
1167 |
|
1168 |
/* liveness analysis: end of function: globals are live, temps are
|
1169 |
dead. */
|
1170 |
/* XXX: at this stage, not used as there would be little gains because
|
1171 |
most TBs end with a conditional jump. */
|
1172 |
static inline void tcg_la_func_end(TCGContext *s, uint8_t *dead_temps) |
1173 |
{ |
1174 |
memset(dead_temps, 0, s->nb_globals);
|
1175 |
memset(dead_temps + s->nb_globals, 1, s->nb_temps - s->nb_globals);
|
1176 |
} |
1177 |
|
1178 |
/* liveness analysis: end of basic block: globals are live, temps are
|
1179 |
dead, local temps are live. */
|
1180 |
static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps) |
1181 |
{ |
1182 |
int i;
|
1183 |
TCGTemp *ts; |
1184 |
|
1185 |
memset(dead_temps, 0, s->nb_globals);
|
1186 |
ts = &s->temps[s->nb_globals]; |
1187 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
1188 |
if (ts->temp_local)
|
1189 |
dead_temps[i] = 0;
|
1190 |
else
|
1191 |
dead_temps[i] = 1;
|
1192 |
ts++; |
1193 |
} |
1194 |
} |
1195 |
|
1196 |
/* Liveness analysis : update the opc_dead_args array to tell if a
|
1197 |
given input arguments is dead. Instructions updating dead
|
1198 |
temporaries are removed. */
|
1199 |
static void tcg_liveness_analysis(TCGContext *s) |
1200 |
{ |
1201 |
int i, op_index, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
|
1202 |
TCGOpcode op; |
1203 |
TCGArg *args; |
1204 |
const TCGOpDef *def;
|
1205 |
uint8_t *dead_temps; |
1206 |
unsigned int dead_args; |
1207 |
|
1208 |
gen_opc_ptr++; /* skip end */
|
1209 |
|
1210 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
1211 |
|
1212 |
s->op_dead_args = tcg_malloc(nb_ops * sizeof(uint16_t));
|
1213 |
|
1214 |
dead_temps = tcg_malloc(s->nb_temps); |
1215 |
memset(dead_temps, 1, s->nb_temps);
|
1216 |
|
1217 |
args = gen_opparam_ptr; |
1218 |
op_index = nb_ops - 1;
|
1219 |
while (op_index >= 0) { |
1220 |
op = gen_opc_buf[op_index]; |
1221 |
def = &tcg_op_defs[op]; |
1222 |
switch(op) {
|
1223 |
case INDEX_op_call:
|
1224 |
{ |
1225 |
int call_flags;
|
1226 |
|
1227 |
nb_args = args[-1];
|
1228 |
args -= nb_args; |
1229 |
nb_iargs = args[0] & 0xffff; |
1230 |
nb_oargs = args[0] >> 16; |
1231 |
args++; |
1232 |
call_flags = args[nb_oargs + nb_iargs]; |
1233 |
|
1234 |
/* pure functions can be removed if their result is not
|
1235 |
used */
|
1236 |
if (call_flags & TCG_CALL_PURE) {
|
1237 |
for(i = 0; i < nb_oargs; i++) { |
1238 |
arg = args[i]; |
1239 |
if (!dead_temps[arg])
|
1240 |
goto do_not_remove_call;
|
1241 |
} |
1242 |
tcg_set_nop(s, gen_opc_buf + op_index, |
1243 |
args - 1, nb_args);
|
1244 |
} else {
|
1245 |
do_not_remove_call:
|
1246 |
|
1247 |
/* output args are dead */
|
1248 |
dead_args = 0;
|
1249 |
for(i = 0; i < nb_oargs; i++) { |
1250 |
arg = args[i]; |
1251 |
if (dead_temps[arg]) {
|
1252 |
dead_args |= (1 << i);
|
1253 |
} |
1254 |
dead_temps[arg] = 1;
|
1255 |
} |
1256 |
|
1257 |
if (!(call_flags & TCG_CALL_CONST)) {
|
1258 |
/* globals are live (they may be used by the call) */
|
1259 |
memset(dead_temps, 0, s->nb_globals);
|
1260 |
} |
1261 |
|
1262 |
/* input args are live */
|
1263 |
for(i = nb_oargs; i < nb_iargs + nb_oargs; i++) {
|
1264 |
arg = args[i]; |
1265 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1266 |
if (dead_temps[arg]) {
|
1267 |
dead_args |= (1 << i);
|
1268 |
} |
1269 |
dead_temps[arg] = 0;
|
1270 |
} |
1271 |
} |
1272 |
s->op_dead_args[op_index] = dead_args; |
1273 |
} |
1274 |
args--; |
1275 |
} |
1276 |
break;
|
1277 |
case INDEX_op_set_label:
|
1278 |
args--; |
1279 |
/* mark end of basic block */
|
1280 |
tcg_la_bb_end(s, dead_temps); |
1281 |
break;
|
1282 |
case INDEX_op_debug_insn_start:
|
1283 |
args -= def->nb_args; |
1284 |
break;
|
1285 |
case INDEX_op_nopn:
|
1286 |
nb_args = args[-1];
|
1287 |
args -= nb_args; |
1288 |
break;
|
1289 |
case INDEX_op_discard:
|
1290 |
args--; |
1291 |
/* mark the temporary as dead */
|
1292 |
dead_temps[args[0]] = 1; |
1293 |
break;
|
1294 |
case INDEX_op_end:
|
1295 |
break;
|
1296 |
/* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
|
1297 |
default:
|
1298 |
args -= def->nb_args; |
1299 |
nb_iargs = def->nb_iargs; |
1300 |
nb_oargs = def->nb_oargs; |
1301 |
|
1302 |
/* Test if the operation can be removed because all
|
1303 |
its outputs are dead. We assume that nb_oargs == 0
|
1304 |
implies side effects */
|
1305 |
if (!(def->flags & TCG_OPF_SIDE_EFFECTS) && nb_oargs != 0) { |
1306 |
for(i = 0; i < nb_oargs; i++) { |
1307 |
arg = args[i]; |
1308 |
if (!dead_temps[arg])
|
1309 |
goto do_not_remove;
|
1310 |
} |
1311 |
tcg_set_nop(s, gen_opc_buf + op_index, args, def->nb_args); |
1312 |
#ifdef CONFIG_PROFILER
|
1313 |
s->del_op_count++; |
1314 |
#endif
|
1315 |
} else {
|
1316 |
do_not_remove:
|
1317 |
|
1318 |
/* output args are dead */
|
1319 |
dead_args = 0;
|
1320 |
for(i = 0; i < nb_oargs; i++) { |
1321 |
arg = args[i]; |
1322 |
if (dead_temps[arg]) {
|
1323 |
dead_args |= (1 << i);
|
1324 |
} |
1325 |
dead_temps[arg] = 1;
|
1326 |
} |
1327 |
|
1328 |
/* if end of basic block, update */
|
1329 |
if (def->flags & TCG_OPF_BB_END) {
|
1330 |
tcg_la_bb_end(s, dead_temps); |
1331 |
} else if (def->flags & TCG_OPF_CALL_CLOBBER) { |
1332 |
/* globals are live */
|
1333 |
memset(dead_temps, 0, s->nb_globals);
|
1334 |
} |
1335 |
|
1336 |
/* input args are live */
|
1337 |
for(i = nb_oargs; i < nb_oargs + nb_iargs; i++) {
|
1338 |
arg = args[i]; |
1339 |
if (dead_temps[arg]) {
|
1340 |
dead_args |= (1 << i);
|
1341 |
} |
1342 |
dead_temps[arg] = 0;
|
1343 |
} |
1344 |
s->op_dead_args[op_index] = dead_args; |
1345 |
} |
1346 |
break;
|
1347 |
} |
1348 |
op_index--; |
1349 |
} |
1350 |
|
1351 |
if (args != gen_opparam_buf)
|
1352 |
tcg_abort(); |
1353 |
} |
1354 |
#else
|
1355 |
/* dummy liveness analysis */
|
1356 |
static void tcg_liveness_analysis(TCGContext *s) |
1357 |
{ |
1358 |
int nb_ops;
|
1359 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
1360 |
|
1361 |
s->op_dead_args = tcg_malloc(nb_ops * sizeof(uint16_t));
|
1362 |
memset(s->op_dead_args, 0, nb_ops * sizeof(uint16_t)); |
1363 |
} |
1364 |
#endif
|
1365 |
|
1366 |
#ifndef NDEBUG
|
1367 |
static void dump_regs(TCGContext *s) |
1368 |
{ |
1369 |
TCGTemp *ts; |
1370 |
int i;
|
1371 |
char buf[64]; |
1372 |
|
1373 |
for(i = 0; i < s->nb_temps; i++) { |
1374 |
ts = &s->temps[i]; |
1375 |
printf(" %10s: ", tcg_get_arg_str_idx(s, buf, sizeof(buf), i)); |
1376 |
switch(ts->val_type) {
|
1377 |
case TEMP_VAL_REG:
|
1378 |
printf("%s", tcg_target_reg_names[ts->reg]);
|
1379 |
break;
|
1380 |
case TEMP_VAL_MEM:
|
1381 |
printf("%d(%s)", (int)ts->mem_offset, tcg_target_reg_names[ts->mem_reg]); |
1382 |
break;
|
1383 |
case TEMP_VAL_CONST:
|
1384 |
printf("$0x%" TCG_PRIlx, ts->val);
|
1385 |
break;
|
1386 |
case TEMP_VAL_DEAD:
|
1387 |
printf("D");
|
1388 |
break;
|
1389 |
default:
|
1390 |
printf("???");
|
1391 |
break;
|
1392 |
} |
1393 |
printf("\n");
|
1394 |
} |
1395 |
|
1396 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
1397 |
if (s->reg_to_temp[i] >= 0) { |
1398 |
printf("%s: %s\n",
|
1399 |
tcg_target_reg_names[i], |
1400 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), s->reg_to_temp[i]));
|
1401 |
} |
1402 |
} |
1403 |
} |
1404 |
|
1405 |
static void check_regs(TCGContext *s) |
1406 |
{ |
1407 |
int reg, k;
|
1408 |
TCGTemp *ts; |
1409 |
char buf[64]; |
1410 |
|
1411 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1412 |
k = s->reg_to_temp[reg]; |
1413 |
if (k >= 0) { |
1414 |
ts = &s->temps[k]; |
1415 |
if (ts->val_type != TEMP_VAL_REG ||
|
1416 |
ts->reg != reg) { |
1417 |
printf("Inconsistency for register %s:\n",
|
1418 |
tcg_target_reg_names[reg]); |
1419 |
goto fail;
|
1420 |
} |
1421 |
} |
1422 |
} |
1423 |
for(k = 0; k < s->nb_temps; k++) { |
1424 |
ts = &s->temps[k]; |
1425 |
if (ts->val_type == TEMP_VAL_REG &&
|
1426 |
!ts->fixed_reg && |
1427 |
s->reg_to_temp[ts->reg] != k) { |
1428 |
printf("Inconsistency for temp %s:\n",
|
1429 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
|
1430 |
fail:
|
1431 |
printf("reg state:\n");
|
1432 |
dump_regs(s); |
1433 |
tcg_abort(); |
1434 |
} |
1435 |
} |
1436 |
} |
1437 |
#endif
|
1438 |
|
1439 |
static void temp_allocate_frame(TCGContext *s, int temp) |
1440 |
{ |
1441 |
TCGTemp *ts; |
1442 |
ts = &s->temps[temp]; |
1443 |
s->current_frame_offset = (s->current_frame_offset + sizeof(tcg_target_long) - 1) & ~(sizeof(tcg_target_long) - 1); |
1444 |
if (s->current_frame_offset + sizeof(tcg_target_long) > s->frame_end) |
1445 |
tcg_abort(); |
1446 |
ts->mem_offset = s->current_frame_offset; |
1447 |
ts->mem_reg = s->frame_reg; |
1448 |
ts->mem_allocated = 1;
|
1449 |
s->current_frame_offset += sizeof(tcg_target_long);
|
1450 |
} |
1451 |
|
1452 |
/* free register 'reg' by spilling the corresponding temporary if necessary */
|
1453 |
static void tcg_reg_free(TCGContext *s, int reg) |
1454 |
{ |
1455 |
TCGTemp *ts; |
1456 |
int temp;
|
1457 |
|
1458 |
temp = s->reg_to_temp[reg]; |
1459 |
if (temp != -1) { |
1460 |
ts = &s->temps[temp]; |
1461 |
assert(ts->val_type == TEMP_VAL_REG); |
1462 |
if (!ts->mem_coherent) {
|
1463 |
if (!ts->mem_allocated)
|
1464 |
temp_allocate_frame(s, temp); |
1465 |
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1466 |
} |
1467 |
ts->val_type = TEMP_VAL_MEM; |
1468 |
s->reg_to_temp[reg] = -1;
|
1469 |
} |
1470 |
} |
1471 |
|
1472 |
/* Allocate a register belonging to reg1 & ~reg2 */
|
1473 |
static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2) |
1474 |
{ |
1475 |
int i, reg;
|
1476 |
TCGRegSet reg_ct; |
1477 |
|
1478 |
tcg_regset_andnot(reg_ct, reg1, reg2); |
1479 |
|
1480 |
/* first try free registers */
|
1481 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1482 |
reg = tcg_target_reg_alloc_order[i]; |
1483 |
if (tcg_regset_test_reg(reg_ct, reg) && s->reg_to_temp[reg] == -1) |
1484 |
return reg;
|
1485 |
} |
1486 |
|
1487 |
/* XXX: do better spill choice */
|
1488 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1489 |
reg = tcg_target_reg_alloc_order[i]; |
1490 |
if (tcg_regset_test_reg(reg_ct, reg)) {
|
1491 |
tcg_reg_free(s, reg); |
1492 |
return reg;
|
1493 |
} |
1494 |
} |
1495 |
|
1496 |
tcg_abort(); |
1497 |
} |
1498 |
|
1499 |
/* save a temporary to memory. 'allocated_regs' is used in case a
|
1500 |
temporary registers needs to be allocated to store a constant. */
|
1501 |
static void temp_save(TCGContext *s, int temp, TCGRegSet allocated_regs) |
1502 |
{ |
1503 |
TCGTemp *ts; |
1504 |
int reg;
|
1505 |
|
1506 |
ts = &s->temps[temp]; |
1507 |
if (!ts->fixed_reg) {
|
1508 |
switch(ts->val_type) {
|
1509 |
case TEMP_VAL_REG:
|
1510 |
tcg_reg_free(s, ts->reg); |
1511 |
break;
|
1512 |
case TEMP_VAL_DEAD:
|
1513 |
ts->val_type = TEMP_VAL_MEM; |
1514 |
break;
|
1515 |
case TEMP_VAL_CONST:
|
1516 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1517 |
allocated_regs); |
1518 |
if (!ts->mem_allocated)
|
1519 |
temp_allocate_frame(s, temp); |
1520 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1521 |
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1522 |
ts->val_type = TEMP_VAL_MEM; |
1523 |
break;
|
1524 |
case TEMP_VAL_MEM:
|
1525 |
break;
|
1526 |
default:
|
1527 |
tcg_abort(); |
1528 |
} |
1529 |
} |
1530 |
} |
1531 |
|
1532 |
/* save globals to their cannonical location and assume they can be
|
1533 |
modified be the following code. 'allocated_regs' is used in case a
|
1534 |
temporary registers needs to be allocated to store a constant. */
|
1535 |
static void save_globals(TCGContext *s, TCGRegSet allocated_regs) |
1536 |
{ |
1537 |
int i;
|
1538 |
|
1539 |
for(i = 0; i < s->nb_globals; i++) { |
1540 |
temp_save(s, i, allocated_regs); |
1541 |
} |
1542 |
} |
1543 |
|
1544 |
/* at the end of a basic block, we assume all temporaries are dead and
|
1545 |
all globals are stored at their canonical location. */
|
1546 |
static void tcg_reg_alloc_bb_end(TCGContext *s, TCGRegSet allocated_regs) |
1547 |
{ |
1548 |
TCGTemp *ts; |
1549 |
int i;
|
1550 |
|
1551 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
1552 |
ts = &s->temps[i]; |
1553 |
if (ts->temp_local) {
|
1554 |
temp_save(s, i, allocated_regs); |
1555 |
} else {
|
1556 |
if (ts->val_type == TEMP_VAL_REG) {
|
1557 |
s->reg_to_temp[ts->reg] = -1;
|
1558 |
} |
1559 |
ts->val_type = TEMP_VAL_DEAD; |
1560 |
} |
1561 |
} |
1562 |
|
1563 |
save_globals(s, allocated_regs); |
1564 |
} |
1565 |
|
1566 |
#define IS_DEAD_ARG(n) ((dead_args >> (n)) & 1) |
1567 |
|
1568 |
static void tcg_reg_alloc_movi(TCGContext *s, const TCGArg *args) |
1569 |
{ |
1570 |
TCGTemp *ots; |
1571 |
tcg_target_ulong val; |
1572 |
|
1573 |
ots = &s->temps[args[0]];
|
1574 |
val = args[1];
|
1575 |
|
1576 |
if (ots->fixed_reg) {
|
1577 |
/* for fixed registers, we do not do any constant
|
1578 |
propagation */
|
1579 |
tcg_out_movi(s, ots->type, ots->reg, val); |
1580 |
} else {
|
1581 |
/* The movi is not explicitly generated here */
|
1582 |
if (ots->val_type == TEMP_VAL_REG)
|
1583 |
s->reg_to_temp[ots->reg] = -1;
|
1584 |
ots->val_type = TEMP_VAL_CONST; |
1585 |
ots->val = val; |
1586 |
} |
1587 |
} |
1588 |
|
1589 |
static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def, |
1590 |
const TCGArg *args,
|
1591 |
unsigned int dead_args) |
1592 |
{ |
1593 |
TCGTemp *ts, *ots; |
1594 |
int reg;
|
1595 |
const TCGArgConstraint *arg_ct;
|
1596 |
|
1597 |
ots = &s->temps[args[0]];
|
1598 |
ts = &s->temps[args[1]];
|
1599 |
arg_ct = &def->args_ct[0];
|
1600 |
|
1601 |
/* XXX: always mark arg dead if IS_DEAD_ARG(1) */
|
1602 |
if (ts->val_type == TEMP_VAL_REG) {
|
1603 |
if (IS_DEAD_ARG(1) && !ts->fixed_reg && !ots->fixed_reg) { |
1604 |
/* the mov can be suppressed */
|
1605 |
if (ots->val_type == TEMP_VAL_REG)
|
1606 |
s->reg_to_temp[ots->reg] = -1;
|
1607 |
reg = ts->reg; |
1608 |
s->reg_to_temp[reg] = -1;
|
1609 |
ts->val_type = TEMP_VAL_DEAD; |
1610 |
} else {
|
1611 |
if (ots->val_type == TEMP_VAL_REG) {
|
1612 |
reg = ots->reg; |
1613 |
} else {
|
1614 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1615 |
} |
1616 |
if (ts->reg != reg) {
|
1617 |
tcg_out_mov(s, ots->type, reg, ts->reg); |
1618 |
} |
1619 |
} |
1620 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1621 |
if (ots->val_type == TEMP_VAL_REG) {
|
1622 |
reg = ots->reg; |
1623 |
} else {
|
1624 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1625 |
} |
1626 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1627 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1628 |
if (ots->fixed_reg) {
|
1629 |
reg = ots->reg; |
1630 |
tcg_out_movi(s, ots->type, reg, ts->val); |
1631 |
} else {
|
1632 |
/* propagate constant */
|
1633 |
if (ots->val_type == TEMP_VAL_REG)
|
1634 |
s->reg_to_temp[ots->reg] = -1;
|
1635 |
ots->val_type = TEMP_VAL_CONST; |
1636 |
ots->val = ts->val; |
1637 |
return;
|
1638 |
} |
1639 |
} else {
|
1640 |
tcg_abort(); |
1641 |
} |
1642 |
s->reg_to_temp[reg] = args[0];
|
1643 |
ots->reg = reg; |
1644 |
ots->val_type = TEMP_VAL_REG; |
1645 |
ots->mem_coherent = 0;
|
1646 |
} |
1647 |
|
1648 |
static void tcg_reg_alloc_op(TCGContext *s, |
1649 |
const TCGOpDef *def, TCGOpcode opc,
|
1650 |
const TCGArg *args,
|
1651 |
unsigned int dead_args) |
1652 |
{ |
1653 |
TCGRegSet allocated_regs; |
1654 |
int i, k, nb_iargs, nb_oargs, reg;
|
1655 |
TCGArg arg; |
1656 |
const TCGArgConstraint *arg_ct;
|
1657 |
TCGTemp *ts; |
1658 |
TCGArg new_args[TCG_MAX_OP_ARGS]; |
1659 |
int const_args[TCG_MAX_OP_ARGS];
|
1660 |
|
1661 |
nb_oargs = def->nb_oargs; |
1662 |
nb_iargs = def->nb_iargs; |
1663 |
|
1664 |
/* copy constants */
|
1665 |
memcpy(new_args + nb_oargs + nb_iargs, |
1666 |
args + nb_oargs + nb_iargs, |
1667 |
sizeof(TCGArg) * def->nb_cargs);
|
1668 |
|
1669 |
/* satisfy input constraints */
|
1670 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1671 |
for(k = 0; k < nb_iargs; k++) { |
1672 |
i = def->sorted_args[nb_oargs + k]; |
1673 |
arg = args[i]; |
1674 |
arg_ct = &def->args_ct[i]; |
1675 |
ts = &s->temps[arg]; |
1676 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1677 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1678 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1679 |
ts->val_type = TEMP_VAL_REG; |
1680 |
ts->reg = reg; |
1681 |
ts->mem_coherent = 1;
|
1682 |
s->reg_to_temp[reg] = arg; |
1683 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1684 |
if (tcg_target_const_match(ts->val, arg_ct)) {
|
1685 |
/* constant is OK for instruction */
|
1686 |
const_args[i] = 1;
|
1687 |
new_args[i] = ts->val; |
1688 |
goto iarg_end;
|
1689 |
} else {
|
1690 |
/* need to move to a register */
|
1691 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1692 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1693 |
ts->val_type = TEMP_VAL_REG; |
1694 |
ts->reg = reg; |
1695 |
ts->mem_coherent = 0;
|
1696 |
s->reg_to_temp[reg] = arg; |
1697 |
} |
1698 |
} |
1699 |
assert(ts->val_type == TEMP_VAL_REG); |
1700 |
if (arg_ct->ct & TCG_CT_IALIAS) {
|
1701 |
if (ts->fixed_reg) {
|
1702 |
/* if fixed register, we must allocate a new register
|
1703 |
if the alias is not the same register */
|
1704 |
if (arg != args[arg_ct->alias_index])
|
1705 |
goto allocate_in_reg;
|
1706 |
} else {
|
1707 |
/* if the input is aliased to an output and if it is
|
1708 |
not dead after the instruction, we must allocate
|
1709 |
a new register and move it */
|
1710 |
if (!IS_DEAD_ARG(i)) {
|
1711 |
goto allocate_in_reg;
|
1712 |
} |
1713 |
} |
1714 |
} |
1715 |
reg = ts->reg; |
1716 |
if (tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1717 |
/* nothing to do : the constraint is satisfied */
|
1718 |
} else {
|
1719 |
allocate_in_reg:
|
1720 |
/* allocate a new register matching the constraint
|
1721 |
and move the temporary register into it */
|
1722 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1723 |
tcg_out_mov(s, ts->type, reg, ts->reg); |
1724 |
} |
1725 |
new_args[i] = reg; |
1726 |
const_args[i] = 0;
|
1727 |
tcg_regset_set_reg(allocated_regs, reg); |
1728 |
iarg_end: ;
|
1729 |
} |
1730 |
|
1731 |
if (def->flags & TCG_OPF_BB_END) {
|
1732 |
tcg_reg_alloc_bb_end(s, allocated_regs); |
1733 |
} else {
|
1734 |
/* mark dead temporaries and free the associated registers */
|
1735 |
for(i = nb_oargs; i < nb_oargs + nb_iargs; i++) {
|
1736 |
arg = args[i]; |
1737 |
if (IS_DEAD_ARG(i)) {
|
1738 |
ts = &s->temps[arg]; |
1739 |
if (!ts->fixed_reg) {
|
1740 |
if (ts->val_type == TEMP_VAL_REG)
|
1741 |
s->reg_to_temp[ts->reg] = -1;
|
1742 |
ts->val_type = TEMP_VAL_DEAD; |
1743 |
} |
1744 |
} |
1745 |
} |
1746 |
|
1747 |
if (def->flags & TCG_OPF_CALL_CLOBBER) {
|
1748 |
/* XXX: permit generic clobber register list ? */
|
1749 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1750 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1751 |
tcg_reg_free(s, reg); |
1752 |
} |
1753 |
} |
1754 |
/* XXX: for load/store we could do that only for the slow path
|
1755 |
(i.e. when a memory callback is called) */
|
1756 |
|
1757 |
/* store globals and free associated registers (we assume the insn
|
1758 |
can modify any global. */
|
1759 |
save_globals(s, allocated_regs); |
1760 |
} |
1761 |
|
1762 |
/* satisfy the output constraints */
|
1763 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1764 |
for(k = 0; k < nb_oargs; k++) { |
1765 |
i = def->sorted_args[k]; |
1766 |
arg = args[i]; |
1767 |
arg_ct = &def->args_ct[i]; |
1768 |
ts = &s->temps[arg]; |
1769 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
1770 |
reg = new_args[arg_ct->alias_index]; |
1771 |
} else {
|
1772 |
/* if fixed register, we try to use it */
|
1773 |
reg = ts->reg; |
1774 |
if (ts->fixed_reg &&
|
1775 |
tcg_regset_test_reg(arg_ct->u.regs, reg)) { |
1776 |
goto oarg_end;
|
1777 |
} |
1778 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1779 |
} |
1780 |
tcg_regset_set_reg(allocated_regs, reg); |
1781 |
/* if a fixed register is used, then a move will be done afterwards */
|
1782 |
if (!ts->fixed_reg) {
|
1783 |
if (ts->val_type == TEMP_VAL_REG)
|
1784 |
s->reg_to_temp[ts->reg] = -1;
|
1785 |
if (IS_DEAD_ARG(i)) {
|
1786 |
ts->val_type = TEMP_VAL_DEAD; |
1787 |
} else {
|
1788 |
ts->val_type = TEMP_VAL_REG; |
1789 |
ts->reg = reg; |
1790 |
/* temp value is modified, so the value kept in memory is
|
1791 |
potentially not the same */
|
1792 |
ts->mem_coherent = 0;
|
1793 |
s->reg_to_temp[reg] = arg; |
1794 |
} |
1795 |
} |
1796 |
oarg_end:
|
1797 |
new_args[i] = reg; |
1798 |
} |
1799 |
} |
1800 |
|
1801 |
/* emit instruction */
|
1802 |
tcg_out_op(s, opc, new_args, const_args); |
1803 |
|
1804 |
/* move the outputs in the correct register if needed */
|
1805 |
for(i = 0; i < nb_oargs; i++) { |
1806 |
ts = &s->temps[args[i]]; |
1807 |
reg = new_args[i]; |
1808 |
if (ts->fixed_reg && ts->reg != reg) {
|
1809 |
tcg_out_mov(s, ts->type, ts->reg, reg); |
1810 |
} |
1811 |
} |
1812 |
} |
1813 |
|
1814 |
#ifdef TCG_TARGET_STACK_GROWSUP
|
1815 |
#define STACK_DIR(x) (-(x))
|
1816 |
#else
|
1817 |
#define STACK_DIR(x) (x)
|
1818 |
#endif
|
1819 |
|
1820 |
static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def, |
1821 |
TCGOpcode opc, const TCGArg *args,
|
1822 |
unsigned int dead_args) |
1823 |
{ |
1824 |
int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params;
|
1825 |
TCGArg arg, func_arg; |
1826 |
TCGTemp *ts; |
1827 |
tcg_target_long stack_offset, call_stack_size, func_addr; |
1828 |
int const_func_arg, allocate_args;
|
1829 |
TCGRegSet allocated_regs; |
1830 |
const TCGArgConstraint *arg_ct;
|
1831 |
|
1832 |
arg = *args++; |
1833 |
|
1834 |
nb_oargs = arg >> 16;
|
1835 |
nb_iargs = arg & 0xffff;
|
1836 |
nb_params = nb_iargs - 1;
|
1837 |
|
1838 |
flags = args[nb_oargs + nb_iargs]; |
1839 |
|
1840 |
nb_regs = tcg_target_get_call_iarg_regs_count(flags); |
1841 |
if (nb_regs > nb_params)
|
1842 |
nb_regs = nb_params; |
1843 |
|
1844 |
/* assign stack slots first */
|
1845 |
/* XXX: preallocate call stack */
|
1846 |
call_stack_size = (nb_params - nb_regs) * sizeof(tcg_target_long);
|
1847 |
call_stack_size = (call_stack_size + TCG_TARGET_STACK_ALIGN - 1) &
|
1848 |
~(TCG_TARGET_STACK_ALIGN - 1);
|
1849 |
allocate_args = (call_stack_size > TCG_STATIC_CALL_ARGS_SIZE); |
1850 |
if (allocate_args) {
|
1851 |
tcg_out_addi(s, TCG_REG_CALL_STACK, -STACK_DIR(call_stack_size)); |
1852 |
} |
1853 |
|
1854 |
stack_offset = TCG_TARGET_CALL_STACK_OFFSET; |
1855 |
for(i = nb_regs; i < nb_params; i++) {
|
1856 |
arg = args[nb_oargs + i]; |
1857 |
#ifdef TCG_TARGET_STACK_GROWSUP
|
1858 |
stack_offset -= sizeof(tcg_target_long);
|
1859 |
#endif
|
1860 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1861 |
ts = &s->temps[arg]; |
1862 |
if (ts->val_type == TEMP_VAL_REG) {
|
1863 |
tcg_out_st(s, ts->type, ts->reg, TCG_REG_CALL_STACK, stack_offset); |
1864 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1865 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1866 |
s->reserved_regs); |
1867 |
/* XXX: not correct if reading values from the stack */
|
1868 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1869 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1870 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1871 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1872 |
s->reserved_regs); |
1873 |
/* XXX: sign extend may be needed on some targets */
|
1874 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1875 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1876 |
} else {
|
1877 |
tcg_abort(); |
1878 |
} |
1879 |
} |
1880 |
#ifndef TCG_TARGET_STACK_GROWSUP
|
1881 |
stack_offset += sizeof(tcg_target_long);
|
1882 |
#endif
|
1883 |
} |
1884 |
|
1885 |
/* assign input registers */
|
1886 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1887 |
for(i = 0; i < nb_regs; i++) { |
1888 |
arg = args[nb_oargs + i]; |
1889 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1890 |
ts = &s->temps[arg]; |
1891 |
reg = tcg_target_call_iarg_regs[i]; |
1892 |
tcg_reg_free(s, reg); |
1893 |
if (ts->val_type == TEMP_VAL_REG) {
|
1894 |
if (ts->reg != reg) {
|
1895 |
tcg_out_mov(s, ts->type, reg, ts->reg); |
1896 |
} |
1897 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1898 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1899 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1900 |
/* XXX: sign extend ? */
|
1901 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1902 |
} else {
|
1903 |
tcg_abort(); |
1904 |
} |
1905 |
tcg_regset_set_reg(allocated_regs, reg); |
1906 |
} |
1907 |
} |
1908 |
|
1909 |
/* assign function address */
|
1910 |
func_arg = args[nb_oargs + nb_iargs - 1];
|
1911 |
arg_ct = &def->args_ct[0];
|
1912 |
ts = &s->temps[func_arg]; |
1913 |
func_addr = ts->val; |
1914 |
const_func_arg = 0;
|
1915 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1916 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1917 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1918 |
func_arg = reg; |
1919 |
tcg_regset_set_reg(allocated_regs, reg); |
1920 |
} else if (ts->val_type == TEMP_VAL_REG) { |
1921 |
reg = ts->reg; |
1922 |
if (!tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1923 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1924 |
tcg_out_mov(s, ts->type, reg, ts->reg); |
1925 |
} |
1926 |
func_arg = reg; |
1927 |
tcg_regset_set_reg(allocated_regs, reg); |
1928 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1929 |
if (tcg_target_const_match(func_addr, arg_ct)) {
|
1930 |
const_func_arg = 1;
|
1931 |
func_arg = func_addr; |
1932 |
} else {
|
1933 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1934 |
tcg_out_movi(s, ts->type, reg, func_addr); |
1935 |
func_arg = reg; |
1936 |
tcg_regset_set_reg(allocated_regs, reg); |
1937 |
} |
1938 |
} else {
|
1939 |
tcg_abort(); |
1940 |
} |
1941 |
|
1942 |
|
1943 |
/* mark dead temporaries and free the associated registers */
|
1944 |
for(i = nb_oargs; i < nb_iargs + nb_oargs; i++) {
|
1945 |
arg = args[i]; |
1946 |
if (IS_DEAD_ARG(i)) {
|
1947 |
ts = &s->temps[arg]; |
1948 |
if (!ts->fixed_reg) {
|
1949 |
if (ts->val_type == TEMP_VAL_REG)
|
1950 |
s->reg_to_temp[ts->reg] = -1;
|
1951 |
ts->val_type = TEMP_VAL_DEAD; |
1952 |
} |
1953 |
} |
1954 |
} |
1955 |
|
1956 |
/* clobber call registers */
|
1957 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1958 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1959 |
tcg_reg_free(s, reg); |
1960 |
} |
1961 |
} |
1962 |
|
1963 |
/* store globals and free associated registers (we assume the call
|
1964 |
can modify any global. */
|
1965 |
if (!(flags & TCG_CALL_CONST)) {
|
1966 |
save_globals(s, allocated_regs); |
1967 |
} |
1968 |
|
1969 |
tcg_out_op(s, opc, &func_arg, &const_func_arg); |
1970 |
|
1971 |
if (allocate_args) {
|
1972 |
tcg_out_addi(s, TCG_REG_CALL_STACK, STACK_DIR(call_stack_size)); |
1973 |
} |
1974 |
|
1975 |
/* assign output registers and emit moves if needed */
|
1976 |
for(i = 0; i < nb_oargs; i++) { |
1977 |
arg = args[i]; |
1978 |
ts = &s->temps[arg]; |
1979 |
reg = tcg_target_call_oarg_regs[i]; |
1980 |
assert(s->reg_to_temp[reg] == -1);
|
1981 |
if (ts->fixed_reg) {
|
1982 |
if (ts->reg != reg) {
|
1983 |
tcg_out_mov(s, ts->type, ts->reg, reg); |
1984 |
} |
1985 |
} else {
|
1986 |
if (ts->val_type == TEMP_VAL_REG)
|
1987 |
s->reg_to_temp[ts->reg] = -1;
|
1988 |
if (IS_DEAD_ARG(i)) {
|
1989 |
ts->val_type = TEMP_VAL_DEAD; |
1990 |
} else {
|
1991 |
ts->val_type = TEMP_VAL_REG; |
1992 |
ts->reg = reg; |
1993 |
ts->mem_coherent = 0;
|
1994 |
s->reg_to_temp[reg] = arg; |
1995 |
} |
1996 |
} |
1997 |
} |
1998 |
|
1999 |
return nb_iargs + nb_oargs + def->nb_cargs + 1; |
2000 |
} |
2001 |
|
2002 |
#ifdef CONFIG_PROFILER
|
2003 |
|
2004 |
static int64_t tcg_table_op_count[NB_OPS];
|
2005 |
|
2006 |
static void dump_op_count(void) |
2007 |
{ |
2008 |
int i;
|
2009 |
FILE *f; |
2010 |
f = fopen("/tmp/op.log", "w"); |
2011 |
for(i = INDEX_op_end; i < NB_OPS; i++) {
|
2012 |
fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, tcg_table_op_count[i]); |
2013 |
} |
2014 |
fclose(f); |
2015 |
} |
2016 |
#endif
|
2017 |
|
2018 |
|
2019 |
static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, |
2020 |
long search_pc)
|
2021 |
{ |
2022 |
TCGOpcode opc; |
2023 |
int op_index;
|
2024 |
const TCGOpDef *def;
|
2025 |
unsigned int dead_args; |
2026 |
const TCGArg *args;
|
2027 |
|
2028 |
#ifdef DEBUG_DISAS
|
2029 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) {
|
2030 |
qemu_log("OP:\n");
|
2031 |
tcg_dump_ops(s, logfile); |
2032 |
qemu_log("\n");
|
2033 |
} |
2034 |
#endif
|
2035 |
|
2036 |
#ifdef CONFIG_PROFILER
|
2037 |
s->la_time -= profile_getclock(); |
2038 |
#endif
|
2039 |
tcg_liveness_analysis(s); |
2040 |
#ifdef CONFIG_PROFILER
|
2041 |
s->la_time += profile_getclock(); |
2042 |
#endif
|
2043 |
|
2044 |
#ifdef DEBUG_DISAS
|
2045 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP_OPT))) {
|
2046 |
qemu_log("OP after liveness analysis:\n");
|
2047 |
tcg_dump_ops(s, logfile); |
2048 |
qemu_log("\n");
|
2049 |
} |
2050 |
#endif
|
2051 |
|
2052 |
tcg_reg_alloc_start(s); |
2053 |
|
2054 |
s->code_buf = gen_code_buf; |
2055 |
s->code_ptr = gen_code_buf; |
2056 |
|
2057 |
args = gen_opparam_buf; |
2058 |
op_index = 0;
|
2059 |
|
2060 |
for(;;) {
|
2061 |
opc = gen_opc_buf[op_index]; |
2062 |
#ifdef CONFIG_PROFILER
|
2063 |
tcg_table_op_count[opc]++; |
2064 |
#endif
|
2065 |
def = &tcg_op_defs[opc]; |
2066 |
#if 0
|
2067 |
printf("%s: %d %d %d\n", def->name,
|
2068 |
def->nb_oargs, def->nb_iargs, def->nb_cargs);
|
2069 |
// dump_regs(s);
|
2070 |
#endif
|
2071 |
switch(opc) {
|
2072 |
case INDEX_op_mov_i32:
|
2073 |
#if TCG_TARGET_REG_BITS == 64 |
2074 |
case INDEX_op_mov_i64:
|
2075 |
#endif
|
2076 |
dead_args = s->op_dead_args[op_index]; |
2077 |
tcg_reg_alloc_mov(s, def, args, dead_args); |
2078 |
break;
|
2079 |
case INDEX_op_movi_i32:
|
2080 |
#if TCG_TARGET_REG_BITS == 64 |
2081 |
case INDEX_op_movi_i64:
|
2082 |
#endif
|
2083 |
tcg_reg_alloc_movi(s, args); |
2084 |
break;
|
2085 |
case INDEX_op_debug_insn_start:
|
2086 |
/* debug instruction */
|
2087 |
break;
|
2088 |
case INDEX_op_nop:
|
2089 |
case INDEX_op_nop1:
|
2090 |
case INDEX_op_nop2:
|
2091 |
case INDEX_op_nop3:
|
2092 |
break;
|
2093 |
case INDEX_op_nopn:
|
2094 |
args += args[0];
|
2095 |
goto next;
|
2096 |
case INDEX_op_discard:
|
2097 |
{ |
2098 |
TCGTemp *ts; |
2099 |
ts = &s->temps[args[0]];
|
2100 |
/* mark the temporary as dead */
|
2101 |
if (!ts->fixed_reg) {
|
2102 |
if (ts->val_type == TEMP_VAL_REG)
|
2103 |
s->reg_to_temp[ts->reg] = -1;
|
2104 |
ts->val_type = TEMP_VAL_DEAD; |
2105 |
} |
2106 |
} |
2107 |
break;
|
2108 |
case INDEX_op_set_label:
|
2109 |
tcg_reg_alloc_bb_end(s, s->reserved_regs); |
2110 |
tcg_out_label(s, args[0], (long)s->code_ptr); |
2111 |
break;
|
2112 |
case INDEX_op_call:
|
2113 |
dead_args = s->op_dead_args[op_index]; |
2114 |
args += tcg_reg_alloc_call(s, def, opc, args, dead_args); |
2115 |
goto next;
|
2116 |
case INDEX_op_end:
|
2117 |
goto the_end;
|
2118 |
default:
|
2119 |
/* Note: in order to speed up the code, it would be much
|
2120 |
faster to have specialized register allocator functions for
|
2121 |
some common argument patterns */
|
2122 |
dead_args = s->op_dead_args[op_index]; |
2123 |
tcg_reg_alloc_op(s, def, opc, args, dead_args); |
2124 |
break;
|
2125 |
} |
2126 |
args += def->nb_args; |
2127 |
next:
|
2128 |
if (search_pc >= 0 && search_pc < s->code_ptr - gen_code_buf) { |
2129 |
return op_index;
|
2130 |
} |
2131 |
op_index++; |
2132 |
#ifndef NDEBUG
|
2133 |
check_regs(s); |
2134 |
#endif
|
2135 |
} |
2136 |
the_end:
|
2137 |
return -1; |
2138 |
} |
2139 |
|
2140 |
int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf)
|
2141 |
{ |
2142 |
#ifdef CONFIG_PROFILER
|
2143 |
{ |
2144 |
int n;
|
2145 |
n = (gen_opc_ptr - gen_opc_buf); |
2146 |
s->op_count += n; |
2147 |
if (n > s->op_count_max)
|
2148 |
s->op_count_max = n; |
2149 |
|
2150 |
s->temp_count += s->nb_temps; |
2151 |
if (s->nb_temps > s->temp_count_max)
|
2152 |
s->temp_count_max = s->nb_temps; |
2153 |
} |
2154 |
#endif
|
2155 |
|
2156 |
tcg_gen_code_common(s, gen_code_buf, -1);
|
2157 |
|
2158 |
/* flush instruction cache */
|
2159 |
flush_icache_range((unsigned long)gen_code_buf, |
2160 |
(unsigned long)s->code_ptr); |
2161 |
return s->code_ptr - gen_code_buf;
|
2162 |
} |
2163 |
|
2164 |
/* Return the index of the micro operation such as the pc after is <
|
2165 |
offset bytes from the start of the TB. The contents of gen_code_buf must
|
2166 |
not be changed, though writing the same values is ok.
|
2167 |
Return -1 if not found. */
|
2168 |
int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset) |
2169 |
{ |
2170 |
return tcg_gen_code_common(s, gen_code_buf, offset);
|
2171 |
} |
2172 |
|
2173 |
#ifdef CONFIG_PROFILER
|
2174 |
void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf)
|
2175 |
{ |
2176 |
TCGContext *s = &tcg_ctx; |
2177 |
int64_t tot; |
2178 |
|
2179 |
tot = s->interm_time + s->code_time; |
2180 |
cpu_fprintf(f, "JIT cycles %" PRId64 " (%0.3f s at 2.4 GHz)\n", |
2181 |
tot, tot / 2.4e9); |
2182 |
cpu_fprintf(f, "translated TBs %" PRId64 " (aborted=%" PRId64 " %0.1f%%)\n", |
2183 |
s->tb_count, |
2184 |
s->tb_count1 - s->tb_count, |
2185 |
s->tb_count1 ? (double)(s->tb_count1 - s->tb_count) / s->tb_count1 * 100.0 : 0); |
2186 |
cpu_fprintf(f, "avg ops/TB %0.1f max=%d\n",
|
2187 |
s->tb_count ? (double)s->op_count / s->tb_count : 0, s->op_count_max); |
2188 |
cpu_fprintf(f, "deleted ops/TB %0.2f\n",
|
2189 |
s->tb_count ? |
2190 |
(double)s->del_op_count / s->tb_count : 0); |
2191 |
cpu_fprintf(f, "avg temps/TB %0.2f max=%d\n",
|
2192 |
s->tb_count ? |
2193 |
(double)s->temp_count / s->tb_count : 0, |
2194 |
s->temp_count_max); |
2195 |
|
2196 |
cpu_fprintf(f, "cycles/op %0.1f\n",
|
2197 |
s->op_count ? (double)tot / s->op_count : 0); |
2198 |
cpu_fprintf(f, "cycles/in byte %0.1f\n",
|
2199 |
s->code_in_len ? (double)tot / s->code_in_len : 0); |
2200 |
cpu_fprintf(f, "cycles/out byte %0.1f\n",
|
2201 |
s->code_out_len ? (double)tot / s->code_out_len : 0); |
2202 |
if (tot == 0) |
2203 |
tot = 1;
|
2204 |
cpu_fprintf(f, " gen_interm time %0.1f%%\n",
|
2205 |
(double)s->interm_time / tot * 100.0); |
2206 |
cpu_fprintf(f, " gen_code time %0.1f%%\n",
|
2207 |
(double)s->code_time / tot * 100.0); |
2208 |
cpu_fprintf(f, "liveness/code time %0.1f%%\n",
|
2209 |
(double)s->la_time / (s->code_time ? s->code_time : 1) * 100.0); |
2210 |
cpu_fprintf(f, "cpu_restore count %" PRId64 "\n", |
2211 |
s->restore_count); |
2212 |
cpu_fprintf(f, " avg cycles %0.1f\n",
|
2213 |
s->restore_count ? (double)s->restore_time / s->restore_count : 0); |
2214 |
|
2215 |
dump_op_count(); |
2216 |
} |
2217 |
#else
|
2218 |
void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf)
|
2219 |
{ |
2220 |
cpu_fprintf(f, "[TCG profiler not compiled]\n");
|
2221 |
} |
2222 |
#endif
|