root / tcg / tcg.c @ e4d58b41
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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, n, copy_size) { #s, 0, 0, n, n, 0, copy_size }, |
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#define DEF2(s, oargs, iargs, cargs, flags) { #s, oargs, iargs, cargs, iargs + oargs + cargs, flags, 0 }, |
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#include "tcg-opc.h" |
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#undef DEF
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#undef DEF2
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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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} |
388 |
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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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} |
397 |
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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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} |
406 |
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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; |
414 |
if (temp_local)
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k += TCG_TYPE_COUNT; |
416 |
idx = s->first_free_temp[k]; |
417 |
if (idx != -1) { |
418 |
/* There is already an available temp with the
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right type */
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ts = &s->temps[idx]; |
421 |
s->first_free_temp[k] = ts->next_free_temp; |
422 |
ts->temp_allocated = 1;
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assert(ts->temp_local == temp_local); |
424 |
} else {
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idx = s->nb_temps; |
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#if TCG_TARGET_REG_BITS == 32 |
427 |
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]; |
430 |
ts->base_type = type; |
431 |
ts->type = TCG_TYPE_I32; |
432 |
ts->temp_allocated = 1;
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ts->temp_local = temp_local; |
434 |
ts->name = NULL;
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ts++; |
436 |
ts->base_type = TCG_TYPE_I32; |
437 |
ts->type = TCG_TYPE_I32; |
438 |
ts->temp_allocated = 1;
|
439 |
ts->temp_local = temp_local; |
440 |
ts->name = NULL;
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441 |
s->nb_temps += 2;
|
442 |
} else
|
443 |
#endif
|
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{ |
445 |
tcg_temp_alloc(s, s->nb_temps + 1);
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ts = &s->temps[s->nb_temps]; |
447 |
ts->base_type = type; |
448 |
ts->type = type; |
449 |
ts->temp_allocated = 1;
|
450 |
ts->temp_local = temp_local; |
451 |
ts->name = NULL;
|
452 |
s->nb_temps++; |
453 |
} |
454 |
} |
455 |
return idx;
|
456 |
} |
457 |
|
458 |
TCGv_i32 tcg_temp_new_internal_i32(int temp_local)
|
459 |
{ |
460 |
int idx;
|
461 |
|
462 |
idx = tcg_temp_new_internal(TCG_TYPE_I32, temp_local); |
463 |
return MAKE_TCGV_I32(idx);
|
464 |
} |
465 |
|
466 |
TCGv_i64 tcg_temp_new_internal_i64(int temp_local)
|
467 |
{ |
468 |
int idx;
|
469 |
|
470 |
idx = tcg_temp_new_internal(TCG_TYPE_I64, temp_local); |
471 |
return MAKE_TCGV_I64(idx);
|
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} |
473 |
|
474 |
static inline void tcg_temp_free_internal(int idx) |
475 |
{ |
476 |
TCGContext *s = &tcg_ctx; |
477 |
TCGTemp *ts; |
478 |
int k;
|
479 |
|
480 |
assert(idx >= s->nb_globals && idx < s->nb_temps); |
481 |
ts = &s->temps[idx]; |
482 |
assert(ts->temp_allocated != 0);
|
483 |
ts->temp_allocated = 0;
|
484 |
k = ts->base_type; |
485 |
if (ts->temp_local)
|
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k += TCG_TYPE_COUNT; |
487 |
ts->next_free_temp = s->first_free_temp[k]; |
488 |
s->first_free_temp[k] = idx; |
489 |
} |
490 |
|
491 |
void tcg_temp_free_i32(TCGv_i32 arg)
|
492 |
{ |
493 |
tcg_temp_free_internal(GET_TCGV_I32(arg)); |
494 |
} |
495 |
|
496 |
void tcg_temp_free_i64(TCGv_i64 arg)
|
497 |
{ |
498 |
tcg_temp_free_internal(GET_TCGV_I64(arg)); |
499 |
} |
500 |
|
501 |
TCGv_i32 tcg_const_i32(int32_t val) |
502 |
{ |
503 |
TCGv_i32 t0; |
504 |
t0 = tcg_temp_new_i32(); |
505 |
tcg_gen_movi_i32(t0, val); |
506 |
return t0;
|
507 |
} |
508 |
|
509 |
TCGv_i64 tcg_const_i64(int64_t val) |
510 |
{ |
511 |
TCGv_i64 t0; |
512 |
t0 = tcg_temp_new_i64(); |
513 |
tcg_gen_movi_i64(t0, val); |
514 |
return t0;
|
515 |
} |
516 |
|
517 |
TCGv_i32 tcg_const_local_i32(int32_t val) |
518 |
{ |
519 |
TCGv_i32 t0; |
520 |
t0 = tcg_temp_local_new_i32(); |
521 |
tcg_gen_movi_i32(t0, val); |
522 |
return t0;
|
523 |
} |
524 |
|
525 |
TCGv_i64 tcg_const_local_i64(int64_t val) |
526 |
{ |
527 |
TCGv_i64 t0; |
528 |
t0 = tcg_temp_local_new_i64(); |
529 |
tcg_gen_movi_i64(t0, val); |
530 |
return t0;
|
531 |
} |
532 |
|
533 |
void tcg_register_helper(void *func, const char *name) |
534 |
{ |
535 |
TCGContext *s = &tcg_ctx; |
536 |
int n;
|
537 |
if ((s->nb_helpers + 1) > s->allocated_helpers) { |
538 |
n = s->allocated_helpers; |
539 |
if (n == 0) { |
540 |
n = 4;
|
541 |
} else {
|
542 |
n *= 2;
|
543 |
} |
544 |
s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo));
|
545 |
s->allocated_helpers = n; |
546 |
} |
547 |
s->helpers[s->nb_helpers].func = (tcg_target_ulong)func; |
548 |
s->helpers[s->nb_helpers].name = name; |
549 |
s->nb_helpers++; |
550 |
} |
551 |
|
552 |
/* Note: we convert the 64 bit args to 32 bit and do some alignment
|
553 |
and endian swap. Maybe it would be better to do the alignment
|
554 |
and endian swap in tcg_reg_alloc_call(). */
|
555 |
void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags, |
556 |
int sizemask, TCGArg ret, int nargs, TCGArg *args) |
557 |
{ |
558 |
#ifdef TCG_TARGET_I386
|
559 |
int call_type;
|
560 |
#endif
|
561 |
int i;
|
562 |
int real_args;
|
563 |
int nb_rets;
|
564 |
TCGArg *nparam; |
565 |
*gen_opc_ptr++ = INDEX_op_call; |
566 |
nparam = gen_opparam_ptr++; |
567 |
#ifdef TCG_TARGET_I386
|
568 |
call_type = (flags & TCG_CALL_TYPE_MASK); |
569 |
#endif
|
570 |
if (ret != TCG_CALL_DUMMY_ARG) {
|
571 |
#if TCG_TARGET_REG_BITS < 64 |
572 |
if (sizemask & 1) { |
573 |
#ifdef TCG_TARGET_WORDS_BIGENDIAN
|
574 |
*gen_opparam_ptr++ = ret + 1;
|
575 |
*gen_opparam_ptr++ = ret; |
576 |
#else
|
577 |
*gen_opparam_ptr++ = ret; |
578 |
*gen_opparam_ptr++ = ret + 1;
|
579 |
#endif
|
580 |
nb_rets = 2;
|
581 |
} else
|
582 |
#endif
|
583 |
{ |
584 |
*gen_opparam_ptr++ = ret; |
585 |
nb_rets = 1;
|
586 |
} |
587 |
} else {
|
588 |
nb_rets = 0;
|
589 |
} |
590 |
real_args = 0;
|
591 |
for (i = 0; i < nargs; i++) { |
592 |
#if TCG_TARGET_REG_BITS < 64 |
593 |
if (sizemask & (2 << i)) { |
594 |
#ifdef TCG_TARGET_I386
|
595 |
/* REGPARM case: if the third parameter is 64 bit, it is
|
596 |
allocated on the stack */
|
597 |
if (i == 2 && call_type == TCG_CALL_TYPE_REGPARM) { |
598 |
call_type = TCG_CALL_TYPE_REGPARM_2; |
599 |
flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type; |
600 |
} |
601 |
#endif
|
602 |
#ifdef TCG_TARGET_CALL_ALIGN_ARGS
|
603 |
/* some targets want aligned 64 bit args */
|
604 |
if (real_args & 1) { |
605 |
*gen_opparam_ptr++ = TCG_CALL_DUMMY_ARG; |
606 |
real_args++; |
607 |
} |
608 |
#endif
|
609 |
/* If stack grows up, then we will be placing successive
|
610 |
arguments at lower addresses, which means we need to
|
611 |
reverse the order compared to how we would normally
|
612 |
treat either big or little-endian. For those arguments
|
613 |
that will wind up in registers, this still works for
|
614 |
HPPA (the only current STACK_GROWSUP target) since the
|
615 |
argument registers are *also* allocated in decreasing
|
616 |
order. If another such target is added, this logic may
|
617 |
have to get more complicated to differentiate between
|
618 |
stack arguments and register arguments. */
|
619 |
#if defined(TCG_TARGET_WORDS_BIGENDIAN) != defined(TCG_TARGET_STACK_GROWSUP)
|
620 |
*gen_opparam_ptr++ = args[i] + 1;
|
621 |
*gen_opparam_ptr++ = args[i]; |
622 |
#else
|
623 |
*gen_opparam_ptr++ = args[i]; |
624 |
*gen_opparam_ptr++ = args[i] + 1;
|
625 |
#endif
|
626 |
real_args += 2;
|
627 |
} else
|
628 |
#endif
|
629 |
{ |
630 |
*gen_opparam_ptr++ = args[i]; |
631 |
real_args++; |
632 |
} |
633 |
} |
634 |
*gen_opparam_ptr++ = GET_TCGV_PTR(func); |
635 |
|
636 |
*gen_opparam_ptr++ = flags; |
637 |
|
638 |
*nparam = (nb_rets << 16) | (real_args + 1); |
639 |
|
640 |
/* total parameters, needed to go backward in the instruction stream */
|
641 |
*gen_opparam_ptr++ = 1 + nb_rets + real_args + 3; |
642 |
} |
643 |
|
644 |
#if TCG_TARGET_REG_BITS == 32 |
645 |
void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
|
646 |
int c, int right, int arith) |
647 |
{ |
648 |
if (c == 0) { |
649 |
tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg1)); |
650 |
tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1)); |
651 |
} else if (c >= 32) { |
652 |
c -= 32;
|
653 |
if (right) {
|
654 |
if (arith) {
|
655 |
tcg_gen_sari_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c); |
656 |
tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
|
657 |
} else {
|
658 |
tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c); |
659 |
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
|
660 |
} |
661 |
} else {
|
662 |
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_LOW(arg1), c); |
663 |
tcg_gen_movi_i32(TCGV_LOW(ret), 0);
|
664 |
} |
665 |
} else {
|
666 |
TCGv_i32 t0, t1; |
667 |
|
668 |
t0 = tcg_temp_new_i32(); |
669 |
t1 = tcg_temp_new_i32(); |
670 |
if (right) {
|
671 |
tcg_gen_shli_i32(t0, TCGV_HIGH(arg1), 32 - c);
|
672 |
if (arith)
|
673 |
tcg_gen_sari_i32(t1, TCGV_HIGH(arg1), c); |
674 |
else
|
675 |
tcg_gen_shri_i32(t1, TCGV_HIGH(arg1), c); |
676 |
tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_LOW(arg1), c); |
677 |
tcg_gen_or_i32(TCGV_LOW(ret), TCGV_LOW(ret), t0); |
678 |
tcg_gen_mov_i32(TCGV_HIGH(ret), t1); |
679 |
} else {
|
680 |
tcg_gen_shri_i32(t0, TCGV_LOW(arg1), 32 - c);
|
681 |
/* Note: ret can be the same as arg1, so we use t1 */
|
682 |
tcg_gen_shli_i32(t1, TCGV_LOW(arg1), c); |
683 |
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c); |
684 |
tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t0); |
685 |
tcg_gen_mov_i32(TCGV_LOW(ret), t1); |
686 |
} |
687 |
tcg_temp_free_i32(t0); |
688 |
tcg_temp_free_i32(t1); |
689 |
} |
690 |
} |
691 |
#endif
|
692 |
|
693 |
|
694 |
static void tcg_reg_alloc_start(TCGContext *s) |
695 |
{ |
696 |
int i;
|
697 |
TCGTemp *ts; |
698 |
for(i = 0; i < s->nb_globals; i++) { |
699 |
ts = &s->temps[i]; |
700 |
if (ts->fixed_reg) {
|
701 |
ts->val_type = TEMP_VAL_REG; |
702 |
} else {
|
703 |
ts->val_type = TEMP_VAL_MEM; |
704 |
} |
705 |
} |
706 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
707 |
ts = &s->temps[i]; |
708 |
ts->val_type = TEMP_VAL_DEAD; |
709 |
ts->mem_allocated = 0;
|
710 |
ts->fixed_reg = 0;
|
711 |
} |
712 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
713 |
s->reg_to_temp[i] = -1;
|
714 |
} |
715 |
} |
716 |
|
717 |
static char *tcg_get_arg_str_idx(TCGContext *s, char *buf, int buf_size, |
718 |
int idx)
|
719 |
{ |
720 |
TCGTemp *ts; |
721 |
|
722 |
ts = &s->temps[idx]; |
723 |
if (idx < s->nb_globals) {
|
724 |
pstrcpy(buf, buf_size, ts->name); |
725 |
} else {
|
726 |
if (ts->temp_local)
|
727 |
snprintf(buf, buf_size, "loc%d", idx - s->nb_globals);
|
728 |
else
|
729 |
snprintf(buf, buf_size, "tmp%d", idx - s->nb_globals);
|
730 |
} |
731 |
return buf;
|
732 |
} |
733 |
|
734 |
char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg) |
735 |
{ |
736 |
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I32(arg));
|
737 |
} |
738 |
|
739 |
char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg) |
740 |
{ |
741 |
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I64(arg));
|
742 |
} |
743 |
|
744 |
static int helper_cmp(const void *p1, const void *p2) |
745 |
{ |
746 |
const TCGHelperInfo *th1 = p1;
|
747 |
const TCGHelperInfo *th2 = p2;
|
748 |
if (th1->func < th2->func)
|
749 |
return -1; |
750 |
else if (th1->func == th2->func) |
751 |
return 0; |
752 |
else
|
753 |
return 1; |
754 |
} |
755 |
|
756 |
/* find helper definition (Note: A hash table would be better) */
|
757 |
static TCGHelperInfo *tcg_find_helper(TCGContext *s, tcg_target_ulong val)
|
758 |
{ |
759 |
int m, m_min, m_max;
|
760 |
TCGHelperInfo *th; |
761 |
tcg_target_ulong v; |
762 |
|
763 |
if (unlikely(!s->helpers_sorted)) {
|
764 |
qsort(s->helpers, s->nb_helpers, sizeof(TCGHelperInfo),
|
765 |
helper_cmp); |
766 |
s->helpers_sorted = 1;
|
767 |
} |
768 |
|
769 |
/* binary search */
|
770 |
m_min = 0;
|
771 |
m_max = s->nb_helpers - 1;
|
772 |
while (m_min <= m_max) {
|
773 |
m = (m_min + m_max) >> 1;
|
774 |
th = &s->helpers[m]; |
775 |
v = th->func; |
776 |
if (v == val)
|
777 |
return th;
|
778 |
else if (val < v) { |
779 |
m_max = m - 1;
|
780 |
} else {
|
781 |
m_min = m + 1;
|
782 |
} |
783 |
} |
784 |
return NULL; |
785 |
} |
786 |
|
787 |
static const char * const cond_name[] = |
788 |
{ |
789 |
[TCG_COND_EQ] = "eq",
|
790 |
[TCG_COND_NE] = "ne",
|
791 |
[TCG_COND_LT] = "lt",
|
792 |
[TCG_COND_GE] = "ge",
|
793 |
[TCG_COND_LE] = "le",
|
794 |
[TCG_COND_GT] = "gt",
|
795 |
[TCG_COND_LTU] = "ltu",
|
796 |
[TCG_COND_GEU] = "geu",
|
797 |
[TCG_COND_LEU] = "leu",
|
798 |
[TCG_COND_GTU] = "gtu"
|
799 |
}; |
800 |
|
801 |
void tcg_dump_ops(TCGContext *s, FILE *outfile)
|
802 |
{ |
803 |
const uint16_t *opc_ptr;
|
804 |
const TCGArg *args;
|
805 |
TCGArg arg; |
806 |
TCGOpcode c; |
807 |
int i, k, nb_oargs, nb_iargs, nb_cargs, first_insn;
|
808 |
const TCGOpDef *def;
|
809 |
char buf[128]; |
810 |
|
811 |
first_insn = 1;
|
812 |
opc_ptr = gen_opc_buf; |
813 |
args = gen_opparam_buf; |
814 |
while (opc_ptr < gen_opc_ptr) {
|
815 |
c = *opc_ptr++; |
816 |
def = &tcg_op_defs[c]; |
817 |
if (c == INDEX_op_debug_insn_start) {
|
818 |
uint64_t pc; |
819 |
#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
|
820 |
pc = ((uint64_t)args[1] << 32) | args[0]; |
821 |
#else
|
822 |
pc = args[0];
|
823 |
#endif
|
824 |
if (!first_insn)
|
825 |
fprintf(outfile, "\n");
|
826 |
fprintf(outfile, " ---- 0x%" PRIx64, pc);
|
827 |
first_insn = 0;
|
828 |
nb_oargs = def->nb_oargs; |
829 |
nb_iargs = def->nb_iargs; |
830 |
nb_cargs = def->nb_cargs; |
831 |
} else if (c == INDEX_op_call) { |
832 |
TCGArg arg; |
833 |
|
834 |
/* variable number of arguments */
|
835 |
arg = *args++; |
836 |
nb_oargs = arg >> 16;
|
837 |
nb_iargs = arg & 0xffff;
|
838 |
nb_cargs = def->nb_cargs; |
839 |
|
840 |
fprintf(outfile, " %s ", def->name);
|
841 |
|
842 |
/* function name */
|
843 |
fprintf(outfile, "%s",
|
844 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + nb_iargs - 1])); |
845 |
/* flags */
|
846 |
fprintf(outfile, ",$0x%" TCG_PRIlx,
|
847 |
args[nb_oargs + nb_iargs]); |
848 |
/* nb out args */
|
849 |
fprintf(outfile, ",$%d", nb_oargs);
|
850 |
for(i = 0; i < nb_oargs; i++) { |
851 |
fprintf(outfile, ",");
|
852 |
fprintf(outfile, "%s",
|
853 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[i]));
|
854 |
} |
855 |
for(i = 0; i < (nb_iargs - 1); i++) { |
856 |
fprintf(outfile, ",");
|
857 |
if (args[nb_oargs + i] == TCG_CALL_DUMMY_ARG) {
|
858 |
fprintf(outfile, "<dummy>");
|
859 |
} else {
|
860 |
fprintf(outfile, "%s",
|
861 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + i]));
|
862 |
} |
863 |
} |
864 |
} else if (c == INDEX_op_movi_i32 |
865 |
#if TCG_TARGET_REG_BITS == 64 |
866 |
|| c == INDEX_op_movi_i64 |
867 |
#endif
|
868 |
) { |
869 |
tcg_target_ulong val; |
870 |
TCGHelperInfo *th; |
871 |
|
872 |
nb_oargs = def->nb_oargs; |
873 |
nb_iargs = def->nb_iargs; |
874 |
nb_cargs = def->nb_cargs; |
875 |
fprintf(outfile, " %s %s,$", def->name,
|
876 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[0])); |
877 |
val = args[1];
|
878 |
th = tcg_find_helper(s, val); |
879 |
if (th) {
|
880 |
fprintf(outfile, "%s", th->name);
|
881 |
} else {
|
882 |
if (c == INDEX_op_movi_i32)
|
883 |
fprintf(outfile, "0x%x", (uint32_t)val);
|
884 |
else
|
885 |
fprintf(outfile, "0x%" PRIx64 , (uint64_t)val);
|
886 |
} |
887 |
} else {
|
888 |
fprintf(outfile, " %s ", def->name);
|
889 |
if (c == INDEX_op_nopn) {
|
890 |
/* variable number of arguments */
|
891 |
nb_cargs = *args; |
892 |
nb_oargs = 0;
|
893 |
nb_iargs = 0;
|
894 |
} else {
|
895 |
nb_oargs = def->nb_oargs; |
896 |
nb_iargs = def->nb_iargs; |
897 |
nb_cargs = def->nb_cargs; |
898 |
} |
899 |
|
900 |
k = 0;
|
901 |
for(i = 0; i < nb_oargs; i++) { |
902 |
if (k != 0) |
903 |
fprintf(outfile, ",");
|
904 |
fprintf(outfile, "%s",
|
905 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
906 |
} |
907 |
for(i = 0; i < nb_iargs; i++) { |
908 |
if (k != 0) |
909 |
fprintf(outfile, ",");
|
910 |
fprintf(outfile, "%s",
|
911 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
912 |
} |
913 |
switch (c) {
|
914 |
case INDEX_op_brcond_i32:
|
915 |
#if TCG_TARGET_REG_BITS == 32 |
916 |
case INDEX_op_brcond2_i32:
|
917 |
#elif TCG_TARGET_REG_BITS == 64 |
918 |
case INDEX_op_brcond_i64:
|
919 |
#endif
|
920 |
case INDEX_op_setcond_i32:
|
921 |
#if TCG_TARGET_REG_BITS == 32 |
922 |
case INDEX_op_setcond2_i32:
|
923 |
#elif TCG_TARGET_REG_BITS == 64 |
924 |
case INDEX_op_setcond_i64:
|
925 |
#endif
|
926 |
if (args[k] < ARRAY_SIZE(cond_name) && cond_name[args[k]])
|
927 |
fprintf(outfile, ",%s", cond_name[args[k++]]);
|
928 |
else
|
929 |
fprintf(outfile, ",$0x%" TCG_PRIlx, args[k++]);
|
930 |
i = 1;
|
931 |
break;
|
932 |
default:
|
933 |
i = 0;
|
934 |
break;
|
935 |
} |
936 |
for(; i < nb_cargs; i++) {
|
937 |
if (k != 0) |
938 |
fprintf(outfile, ",");
|
939 |
arg = args[k++]; |
940 |
fprintf(outfile, "$0x%" TCG_PRIlx, arg);
|
941 |
} |
942 |
} |
943 |
fprintf(outfile, "\n");
|
944 |
args += nb_iargs + nb_oargs + nb_cargs; |
945 |
} |
946 |
} |
947 |
|
948 |
/* we give more priority to constraints with less registers */
|
949 |
static int get_constraint_priority(const TCGOpDef *def, int k) |
950 |
{ |
951 |
const TCGArgConstraint *arg_ct;
|
952 |
|
953 |
int i, n;
|
954 |
arg_ct = &def->args_ct[k]; |
955 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
956 |
/* an alias is equivalent to a single register */
|
957 |
n = 1;
|
958 |
} else {
|
959 |
if (!(arg_ct->ct & TCG_CT_REG))
|
960 |
return 0; |
961 |
n = 0;
|
962 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
963 |
if (tcg_regset_test_reg(arg_ct->u.regs, i))
|
964 |
n++; |
965 |
} |
966 |
} |
967 |
return TCG_TARGET_NB_REGS - n + 1; |
968 |
} |
969 |
|
970 |
/* sort from highest priority to lowest */
|
971 |
static void sort_constraints(TCGOpDef *def, int start, int n) |
972 |
{ |
973 |
int i, j, p1, p2, tmp;
|
974 |
|
975 |
for(i = 0; i < n; i++) |
976 |
def->sorted_args[start + i] = start + i; |
977 |
if (n <= 1) |
978 |
return;
|
979 |
for(i = 0; i < n - 1; i++) { |
980 |
for(j = i + 1; j < n; j++) { |
981 |
p1 = get_constraint_priority(def, def->sorted_args[start + i]); |
982 |
p2 = get_constraint_priority(def, def->sorted_args[start + j]); |
983 |
if (p1 < p2) {
|
984 |
tmp = def->sorted_args[start + i]; |
985 |
def->sorted_args[start + i] = def->sorted_args[start + j]; |
986 |
def->sorted_args[start + j] = tmp; |
987 |
} |
988 |
} |
989 |
} |
990 |
} |
991 |
|
992 |
void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs) |
993 |
{ |
994 |
TCGOpcode op; |
995 |
TCGOpDef *def; |
996 |
const char *ct_str; |
997 |
int i, nb_args;
|
998 |
|
999 |
for(;;) {
|
1000 |
if (tdefs->op == (TCGOpcode)-1) |
1001 |
break;
|
1002 |
op = tdefs->op; |
1003 |
assert(op >= 0 && op < NB_OPS);
|
1004 |
def = &tcg_op_defs[op]; |
1005 |
#if defined(CONFIG_DEBUG_TCG)
|
1006 |
/* Duplicate entry in op definitions? */
|
1007 |
assert(!def->used); |
1008 |
def->used = 1;
|
1009 |
#endif
|
1010 |
nb_args = def->nb_iargs + def->nb_oargs; |
1011 |
for(i = 0; i < nb_args; i++) { |
1012 |
ct_str = tdefs->args_ct_str[i]; |
1013 |
/* Incomplete TCGTargetOpDef entry? */
|
1014 |
assert(ct_str != NULL);
|
1015 |
tcg_regset_clear(def->args_ct[i].u.regs); |
1016 |
def->args_ct[i].ct = 0;
|
1017 |
if (ct_str[0] >= '0' && ct_str[0] <= '9') { |
1018 |
int oarg;
|
1019 |
oarg = ct_str[0] - '0'; |
1020 |
assert(oarg < def->nb_oargs); |
1021 |
assert(def->args_ct[oarg].ct & TCG_CT_REG); |
1022 |
/* TCG_CT_ALIAS is for the output arguments. The input
|
1023 |
argument is tagged with TCG_CT_IALIAS. */
|
1024 |
def->args_ct[i] = def->args_ct[oarg]; |
1025 |
def->args_ct[oarg].ct = TCG_CT_ALIAS; |
1026 |
def->args_ct[oarg].alias_index = i; |
1027 |
def->args_ct[i].ct |= TCG_CT_IALIAS; |
1028 |
def->args_ct[i].alias_index = oarg; |
1029 |
} else {
|
1030 |
for(;;) {
|
1031 |
if (*ct_str == '\0') |
1032 |
break;
|
1033 |
switch(*ct_str) {
|
1034 |
case 'i': |
1035 |
def->args_ct[i].ct |= TCG_CT_CONST; |
1036 |
ct_str++; |
1037 |
break;
|
1038 |
default:
|
1039 |
if (target_parse_constraint(&def->args_ct[i], &ct_str) < 0) { |
1040 |
fprintf(stderr, "Invalid constraint '%s' for arg %d of operation '%s'\n",
|
1041 |
ct_str, i, def->name); |
1042 |
exit(1);
|
1043 |
} |
1044 |
} |
1045 |
} |
1046 |
} |
1047 |
} |
1048 |
|
1049 |
/* TCGTargetOpDef entry with too much information? */
|
1050 |
assert(i == TCG_MAX_OP_ARGS || tdefs->args_ct_str[i] == NULL);
|
1051 |
|
1052 |
/* sort the constraints (XXX: this is just an heuristic) */
|
1053 |
sort_constraints(def, 0, def->nb_oargs);
|
1054 |
sort_constraints(def, def->nb_oargs, def->nb_iargs); |
1055 |
|
1056 |
#if 0
|
1057 |
{
|
1058 |
int i;
|
1059 |
|
1060 |
printf("%s: sorted=", def->name);
|
1061 |
for(i = 0; i < def->nb_oargs + def->nb_iargs; i++)
|
1062 |
printf(" %d", def->sorted_args[i]);
|
1063 |
printf("\n");
|
1064 |
}
|
1065 |
#endif
|
1066 |
tdefs++; |
1067 |
} |
1068 |
|
1069 |
#if defined(CONFIG_DEBUG_TCG)
|
1070 |
i = 0;
|
1071 |
for (op = 0; op < ARRAY_SIZE(tcg_op_defs); op++) { |
1072 |
if (op < INDEX_op_call || op == INDEX_op_debug_insn_start) {
|
1073 |
/* Wrong entry in op definitions? */
|
1074 |
if (tcg_op_defs[op].used) {
|
1075 |
fprintf(stderr, "Invalid op definition for %s\n",
|
1076 |
tcg_op_defs[op].name); |
1077 |
i = 1;
|
1078 |
} |
1079 |
} else {
|
1080 |
/* Missing entry in op definitions? */
|
1081 |
if (!tcg_op_defs[op].used) {
|
1082 |
fprintf(stderr, "Missing op definition for %s\n",
|
1083 |
tcg_op_defs[op].name); |
1084 |
i = 1;
|
1085 |
} |
1086 |
} |
1087 |
} |
1088 |
if (i == 1) { |
1089 |
tcg_abort(); |
1090 |
} |
1091 |
#endif
|
1092 |
} |
1093 |
|
1094 |
#ifdef USE_LIVENESS_ANALYSIS
|
1095 |
|
1096 |
/* set a nop for an operation using 'nb_args' */
|
1097 |
static inline void tcg_set_nop(TCGContext *s, uint16_t *opc_ptr, |
1098 |
TCGArg *args, int nb_args)
|
1099 |
{ |
1100 |
if (nb_args == 0) { |
1101 |
*opc_ptr = INDEX_op_nop; |
1102 |
} else {
|
1103 |
*opc_ptr = INDEX_op_nopn; |
1104 |
args[0] = nb_args;
|
1105 |
args[nb_args - 1] = nb_args;
|
1106 |
} |
1107 |
} |
1108 |
|
1109 |
/* liveness analysis: end of function: globals are live, temps are
|
1110 |
dead. */
|
1111 |
/* XXX: at this stage, not used as there would be little gains because
|
1112 |
most TBs end with a conditional jump. */
|
1113 |
static inline void tcg_la_func_end(TCGContext *s, uint8_t *dead_temps) |
1114 |
{ |
1115 |
memset(dead_temps, 0, s->nb_globals);
|
1116 |
memset(dead_temps + s->nb_globals, 1, s->nb_temps - s->nb_globals);
|
1117 |
} |
1118 |
|
1119 |
/* liveness analysis: end of basic block: globals are live, temps are
|
1120 |
dead, local temps are live. */
|
1121 |
static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps) |
1122 |
{ |
1123 |
int i;
|
1124 |
TCGTemp *ts; |
1125 |
|
1126 |
memset(dead_temps, 0, s->nb_globals);
|
1127 |
ts = &s->temps[s->nb_globals]; |
1128 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
1129 |
if (ts->temp_local)
|
1130 |
dead_temps[i] = 0;
|
1131 |
else
|
1132 |
dead_temps[i] = 1;
|
1133 |
ts++; |
1134 |
} |
1135 |
} |
1136 |
|
1137 |
/* Liveness analysis : update the opc_dead_iargs array to tell if a
|
1138 |
given input arguments is dead. Instructions updating dead
|
1139 |
temporaries are removed. */
|
1140 |
static void tcg_liveness_analysis(TCGContext *s) |
1141 |
{ |
1142 |
int i, op_index, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
|
1143 |
TCGOpcode op; |
1144 |
TCGArg *args; |
1145 |
const TCGOpDef *def;
|
1146 |
uint8_t *dead_temps; |
1147 |
unsigned int dead_iargs; |
1148 |
|
1149 |
gen_opc_ptr++; /* skip end */
|
1150 |
|
1151 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
1152 |
|
1153 |
s->op_dead_iargs = tcg_malloc(nb_ops * sizeof(uint16_t));
|
1154 |
|
1155 |
dead_temps = tcg_malloc(s->nb_temps); |
1156 |
memset(dead_temps, 1, s->nb_temps);
|
1157 |
|
1158 |
args = gen_opparam_ptr; |
1159 |
op_index = nb_ops - 1;
|
1160 |
while (op_index >= 0) { |
1161 |
op = gen_opc_buf[op_index]; |
1162 |
def = &tcg_op_defs[op]; |
1163 |
switch(op) {
|
1164 |
case INDEX_op_call:
|
1165 |
{ |
1166 |
int call_flags;
|
1167 |
|
1168 |
nb_args = args[-1];
|
1169 |
args -= nb_args; |
1170 |
nb_iargs = args[0] & 0xffff; |
1171 |
nb_oargs = args[0] >> 16; |
1172 |
args++; |
1173 |
call_flags = args[nb_oargs + nb_iargs]; |
1174 |
|
1175 |
/* pure functions can be removed if their result is not
|
1176 |
used */
|
1177 |
if (call_flags & TCG_CALL_PURE) {
|
1178 |
for(i = 0; i < nb_oargs; i++) { |
1179 |
arg = args[i]; |
1180 |
if (!dead_temps[arg])
|
1181 |
goto do_not_remove_call;
|
1182 |
} |
1183 |
tcg_set_nop(s, gen_opc_buf + op_index, |
1184 |
args - 1, nb_args);
|
1185 |
} else {
|
1186 |
do_not_remove_call:
|
1187 |
|
1188 |
/* output args are dead */
|
1189 |
for(i = 0; i < nb_oargs; i++) { |
1190 |
arg = args[i]; |
1191 |
dead_temps[arg] = 1;
|
1192 |
} |
1193 |
|
1194 |
if (!(call_flags & TCG_CALL_CONST)) {
|
1195 |
/* globals are live (they may be used by the call) */
|
1196 |
memset(dead_temps, 0, s->nb_globals);
|
1197 |
} |
1198 |
|
1199 |
/* input args are live */
|
1200 |
dead_iargs = 0;
|
1201 |
for(i = 0; i < nb_iargs; i++) { |
1202 |
arg = args[i + nb_oargs]; |
1203 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1204 |
if (dead_temps[arg]) {
|
1205 |
dead_iargs |= (1 << i);
|
1206 |
} |
1207 |
dead_temps[arg] = 0;
|
1208 |
} |
1209 |
} |
1210 |
s->op_dead_iargs[op_index] = dead_iargs; |
1211 |
} |
1212 |
args--; |
1213 |
} |
1214 |
break;
|
1215 |
case INDEX_op_set_label:
|
1216 |
args--; |
1217 |
/* mark end of basic block */
|
1218 |
tcg_la_bb_end(s, dead_temps); |
1219 |
break;
|
1220 |
case INDEX_op_debug_insn_start:
|
1221 |
args -= def->nb_args; |
1222 |
break;
|
1223 |
case INDEX_op_nopn:
|
1224 |
nb_args = args[-1];
|
1225 |
args -= nb_args; |
1226 |
break;
|
1227 |
case INDEX_op_discard:
|
1228 |
args--; |
1229 |
/* mark the temporary as dead */
|
1230 |
dead_temps[args[0]] = 1; |
1231 |
break;
|
1232 |
case INDEX_op_end:
|
1233 |
break;
|
1234 |
/* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
|
1235 |
default:
|
1236 |
args -= def->nb_args; |
1237 |
nb_iargs = def->nb_iargs; |
1238 |
nb_oargs = def->nb_oargs; |
1239 |
|
1240 |
/* Test if the operation can be removed because all
|
1241 |
its outputs are dead. We assume that nb_oargs == 0
|
1242 |
implies side effects */
|
1243 |
if (!(def->flags & TCG_OPF_SIDE_EFFECTS) && nb_oargs != 0) { |
1244 |
for(i = 0; i < nb_oargs; i++) { |
1245 |
arg = args[i]; |
1246 |
if (!dead_temps[arg])
|
1247 |
goto do_not_remove;
|
1248 |
} |
1249 |
tcg_set_nop(s, gen_opc_buf + op_index, args, def->nb_args); |
1250 |
#ifdef CONFIG_PROFILER
|
1251 |
s->del_op_count++; |
1252 |
#endif
|
1253 |
} else {
|
1254 |
do_not_remove:
|
1255 |
|
1256 |
/* output args are dead */
|
1257 |
for(i = 0; i < nb_oargs; i++) { |
1258 |
arg = args[i]; |
1259 |
dead_temps[arg] = 1;
|
1260 |
} |
1261 |
|
1262 |
/* if end of basic block, update */
|
1263 |
if (def->flags & TCG_OPF_BB_END) {
|
1264 |
tcg_la_bb_end(s, dead_temps); |
1265 |
} else if (def->flags & TCG_OPF_CALL_CLOBBER) { |
1266 |
/* globals are live */
|
1267 |
memset(dead_temps, 0, s->nb_globals);
|
1268 |
} |
1269 |
|
1270 |
/* input args are live */
|
1271 |
dead_iargs = 0;
|
1272 |
for(i = 0; i < nb_iargs; i++) { |
1273 |
arg = args[i + nb_oargs]; |
1274 |
if (dead_temps[arg]) {
|
1275 |
dead_iargs |= (1 << i);
|
1276 |
} |
1277 |
dead_temps[arg] = 0;
|
1278 |
} |
1279 |
s->op_dead_iargs[op_index] = dead_iargs; |
1280 |
} |
1281 |
break;
|
1282 |
} |
1283 |
op_index--; |
1284 |
} |
1285 |
|
1286 |
if (args != gen_opparam_buf)
|
1287 |
tcg_abort(); |
1288 |
} |
1289 |
#else
|
1290 |
/* dummy liveness analysis */
|
1291 |
static void tcg_liveness_analysis(TCGContext *s) |
1292 |
{ |
1293 |
int nb_ops;
|
1294 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
1295 |
|
1296 |
s->op_dead_iargs = tcg_malloc(nb_ops * sizeof(uint16_t));
|
1297 |
memset(s->op_dead_iargs, 0, nb_ops * sizeof(uint16_t)); |
1298 |
} |
1299 |
#endif
|
1300 |
|
1301 |
#ifndef NDEBUG
|
1302 |
static void dump_regs(TCGContext *s) |
1303 |
{ |
1304 |
TCGTemp *ts; |
1305 |
int i;
|
1306 |
char buf[64]; |
1307 |
|
1308 |
for(i = 0; i < s->nb_temps; i++) { |
1309 |
ts = &s->temps[i]; |
1310 |
printf(" %10s: ", tcg_get_arg_str_idx(s, buf, sizeof(buf), i)); |
1311 |
switch(ts->val_type) {
|
1312 |
case TEMP_VAL_REG:
|
1313 |
printf("%s", tcg_target_reg_names[ts->reg]);
|
1314 |
break;
|
1315 |
case TEMP_VAL_MEM:
|
1316 |
printf("%d(%s)", (int)ts->mem_offset, tcg_target_reg_names[ts->mem_reg]); |
1317 |
break;
|
1318 |
case TEMP_VAL_CONST:
|
1319 |
printf("$0x%" TCG_PRIlx, ts->val);
|
1320 |
break;
|
1321 |
case TEMP_VAL_DEAD:
|
1322 |
printf("D");
|
1323 |
break;
|
1324 |
default:
|
1325 |
printf("???");
|
1326 |
break;
|
1327 |
} |
1328 |
printf("\n");
|
1329 |
} |
1330 |
|
1331 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
1332 |
if (s->reg_to_temp[i] >= 0) { |
1333 |
printf("%s: %s\n",
|
1334 |
tcg_target_reg_names[i], |
1335 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), s->reg_to_temp[i]));
|
1336 |
} |
1337 |
} |
1338 |
} |
1339 |
|
1340 |
static void check_regs(TCGContext *s) |
1341 |
{ |
1342 |
int reg, k;
|
1343 |
TCGTemp *ts; |
1344 |
char buf[64]; |
1345 |
|
1346 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1347 |
k = s->reg_to_temp[reg]; |
1348 |
if (k >= 0) { |
1349 |
ts = &s->temps[k]; |
1350 |
if (ts->val_type != TEMP_VAL_REG ||
|
1351 |
ts->reg != reg) { |
1352 |
printf("Inconsistency for register %s:\n",
|
1353 |
tcg_target_reg_names[reg]); |
1354 |
goto fail;
|
1355 |
} |
1356 |
} |
1357 |
} |
1358 |
for(k = 0; k < s->nb_temps; k++) { |
1359 |
ts = &s->temps[k]; |
1360 |
if (ts->val_type == TEMP_VAL_REG &&
|
1361 |
!ts->fixed_reg && |
1362 |
s->reg_to_temp[ts->reg] != k) { |
1363 |
printf("Inconsistency for temp %s:\n",
|
1364 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
|
1365 |
fail:
|
1366 |
printf("reg state:\n");
|
1367 |
dump_regs(s); |
1368 |
tcg_abort(); |
1369 |
} |
1370 |
} |
1371 |
} |
1372 |
#endif
|
1373 |
|
1374 |
static void temp_allocate_frame(TCGContext *s, int temp) |
1375 |
{ |
1376 |
TCGTemp *ts; |
1377 |
ts = &s->temps[temp]; |
1378 |
s->current_frame_offset = (s->current_frame_offset + sizeof(tcg_target_long) - 1) & ~(sizeof(tcg_target_long) - 1); |
1379 |
if (s->current_frame_offset + sizeof(tcg_target_long) > s->frame_end) |
1380 |
tcg_abort(); |
1381 |
ts->mem_offset = s->current_frame_offset; |
1382 |
ts->mem_reg = s->frame_reg; |
1383 |
ts->mem_allocated = 1;
|
1384 |
s->current_frame_offset += sizeof(tcg_target_long);
|
1385 |
} |
1386 |
|
1387 |
/* free register 'reg' by spilling the corresponding temporary if necessary */
|
1388 |
static void tcg_reg_free(TCGContext *s, int reg) |
1389 |
{ |
1390 |
TCGTemp *ts; |
1391 |
int temp;
|
1392 |
|
1393 |
temp = s->reg_to_temp[reg]; |
1394 |
if (temp != -1) { |
1395 |
ts = &s->temps[temp]; |
1396 |
assert(ts->val_type == TEMP_VAL_REG); |
1397 |
if (!ts->mem_coherent) {
|
1398 |
if (!ts->mem_allocated)
|
1399 |
temp_allocate_frame(s, temp); |
1400 |
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1401 |
} |
1402 |
ts->val_type = TEMP_VAL_MEM; |
1403 |
s->reg_to_temp[reg] = -1;
|
1404 |
} |
1405 |
} |
1406 |
|
1407 |
/* Allocate a register belonging to reg1 & ~reg2 */
|
1408 |
static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2) |
1409 |
{ |
1410 |
int i, reg;
|
1411 |
TCGRegSet reg_ct; |
1412 |
|
1413 |
tcg_regset_andnot(reg_ct, reg1, reg2); |
1414 |
|
1415 |
/* first try free registers */
|
1416 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1417 |
reg = tcg_target_reg_alloc_order[i]; |
1418 |
if (tcg_regset_test_reg(reg_ct, reg) && s->reg_to_temp[reg] == -1) |
1419 |
return reg;
|
1420 |
} |
1421 |
|
1422 |
/* XXX: do better spill choice */
|
1423 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1424 |
reg = tcg_target_reg_alloc_order[i]; |
1425 |
if (tcg_regset_test_reg(reg_ct, reg)) {
|
1426 |
tcg_reg_free(s, reg); |
1427 |
return reg;
|
1428 |
} |
1429 |
} |
1430 |
|
1431 |
tcg_abort(); |
1432 |
} |
1433 |
|
1434 |
/* save a temporary to memory. 'allocated_regs' is used in case a
|
1435 |
temporary registers needs to be allocated to store a constant. */
|
1436 |
static void temp_save(TCGContext *s, int temp, TCGRegSet allocated_regs) |
1437 |
{ |
1438 |
TCGTemp *ts; |
1439 |
int reg;
|
1440 |
|
1441 |
ts = &s->temps[temp]; |
1442 |
if (!ts->fixed_reg) {
|
1443 |
switch(ts->val_type) {
|
1444 |
case TEMP_VAL_REG:
|
1445 |
tcg_reg_free(s, ts->reg); |
1446 |
break;
|
1447 |
case TEMP_VAL_DEAD:
|
1448 |
ts->val_type = TEMP_VAL_MEM; |
1449 |
break;
|
1450 |
case TEMP_VAL_CONST:
|
1451 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1452 |
allocated_regs); |
1453 |
if (!ts->mem_allocated)
|
1454 |
temp_allocate_frame(s, temp); |
1455 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1456 |
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1457 |
ts->val_type = TEMP_VAL_MEM; |
1458 |
break;
|
1459 |
case TEMP_VAL_MEM:
|
1460 |
break;
|
1461 |
default:
|
1462 |
tcg_abort(); |
1463 |
} |
1464 |
} |
1465 |
} |
1466 |
|
1467 |
/* save globals to their cannonical location and assume they can be
|
1468 |
modified be the following code. 'allocated_regs' is used in case a
|
1469 |
temporary registers needs to be allocated to store a constant. */
|
1470 |
static void save_globals(TCGContext *s, TCGRegSet allocated_regs) |
1471 |
{ |
1472 |
int i;
|
1473 |
|
1474 |
for(i = 0; i < s->nb_globals; i++) { |
1475 |
temp_save(s, i, allocated_regs); |
1476 |
} |
1477 |
} |
1478 |
|
1479 |
/* at the end of a basic block, we assume all temporaries are dead and
|
1480 |
all globals are stored at their canonical location. */
|
1481 |
static void tcg_reg_alloc_bb_end(TCGContext *s, TCGRegSet allocated_regs) |
1482 |
{ |
1483 |
TCGTemp *ts; |
1484 |
int i;
|
1485 |
|
1486 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
1487 |
ts = &s->temps[i]; |
1488 |
if (ts->temp_local) {
|
1489 |
temp_save(s, i, allocated_regs); |
1490 |
} else {
|
1491 |
if (ts->val_type == TEMP_VAL_REG) {
|
1492 |
s->reg_to_temp[ts->reg] = -1;
|
1493 |
} |
1494 |
ts->val_type = TEMP_VAL_DEAD; |
1495 |
} |
1496 |
} |
1497 |
|
1498 |
save_globals(s, allocated_regs); |
1499 |
} |
1500 |
|
1501 |
#define IS_DEAD_IARG(n) ((dead_iargs >> (n)) & 1) |
1502 |
|
1503 |
static void tcg_reg_alloc_movi(TCGContext *s, const TCGArg *args) |
1504 |
{ |
1505 |
TCGTemp *ots; |
1506 |
tcg_target_ulong val; |
1507 |
|
1508 |
ots = &s->temps[args[0]];
|
1509 |
val = args[1];
|
1510 |
|
1511 |
if (ots->fixed_reg) {
|
1512 |
/* for fixed registers, we do not do any constant
|
1513 |
propagation */
|
1514 |
tcg_out_movi(s, ots->type, ots->reg, val); |
1515 |
} else {
|
1516 |
/* The movi is not explicitly generated here */
|
1517 |
if (ots->val_type == TEMP_VAL_REG)
|
1518 |
s->reg_to_temp[ots->reg] = -1;
|
1519 |
ots->val_type = TEMP_VAL_CONST; |
1520 |
ots->val = val; |
1521 |
} |
1522 |
} |
1523 |
|
1524 |
static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def, |
1525 |
const TCGArg *args,
|
1526 |
unsigned int dead_iargs) |
1527 |
{ |
1528 |
TCGTemp *ts, *ots; |
1529 |
int reg;
|
1530 |
const TCGArgConstraint *arg_ct;
|
1531 |
|
1532 |
ots = &s->temps[args[0]];
|
1533 |
ts = &s->temps[args[1]];
|
1534 |
arg_ct = &def->args_ct[0];
|
1535 |
|
1536 |
/* XXX: always mark arg dead if IS_DEAD_IARG(0) */
|
1537 |
if (ts->val_type == TEMP_VAL_REG) {
|
1538 |
if (IS_DEAD_IARG(0) && !ts->fixed_reg && !ots->fixed_reg) { |
1539 |
/* the mov can be suppressed */
|
1540 |
if (ots->val_type == TEMP_VAL_REG)
|
1541 |
s->reg_to_temp[ots->reg] = -1;
|
1542 |
reg = ts->reg; |
1543 |
s->reg_to_temp[reg] = -1;
|
1544 |
ts->val_type = TEMP_VAL_DEAD; |
1545 |
} else {
|
1546 |
if (ots->val_type == TEMP_VAL_REG) {
|
1547 |
reg = ots->reg; |
1548 |
} else {
|
1549 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1550 |
} |
1551 |
if (ts->reg != reg) {
|
1552 |
tcg_out_mov(s, ots->type, reg, ts->reg); |
1553 |
} |
1554 |
} |
1555 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1556 |
if (ots->val_type == TEMP_VAL_REG) {
|
1557 |
reg = ots->reg; |
1558 |
} else {
|
1559 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1560 |
} |
1561 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1562 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1563 |
if (ots->fixed_reg) {
|
1564 |
reg = ots->reg; |
1565 |
tcg_out_movi(s, ots->type, reg, ts->val); |
1566 |
} else {
|
1567 |
/* propagate constant */
|
1568 |
if (ots->val_type == TEMP_VAL_REG)
|
1569 |
s->reg_to_temp[ots->reg] = -1;
|
1570 |
ots->val_type = TEMP_VAL_CONST; |
1571 |
ots->val = ts->val; |
1572 |
return;
|
1573 |
} |
1574 |
} else {
|
1575 |
tcg_abort(); |
1576 |
} |
1577 |
s->reg_to_temp[reg] = args[0];
|
1578 |
ots->reg = reg; |
1579 |
ots->val_type = TEMP_VAL_REG; |
1580 |
ots->mem_coherent = 0;
|
1581 |
} |
1582 |
|
1583 |
static void tcg_reg_alloc_op(TCGContext *s, |
1584 |
const TCGOpDef *def, TCGOpcode opc,
|
1585 |
const TCGArg *args,
|
1586 |
unsigned int dead_iargs) |
1587 |
{ |
1588 |
TCGRegSet allocated_regs; |
1589 |
int i, k, nb_iargs, nb_oargs, reg;
|
1590 |
TCGArg arg; |
1591 |
const TCGArgConstraint *arg_ct;
|
1592 |
TCGTemp *ts; |
1593 |
TCGArg new_args[TCG_MAX_OP_ARGS]; |
1594 |
int const_args[TCG_MAX_OP_ARGS];
|
1595 |
|
1596 |
nb_oargs = def->nb_oargs; |
1597 |
nb_iargs = def->nb_iargs; |
1598 |
|
1599 |
/* copy constants */
|
1600 |
memcpy(new_args + nb_oargs + nb_iargs, |
1601 |
args + nb_oargs + nb_iargs, |
1602 |
sizeof(TCGArg) * def->nb_cargs);
|
1603 |
|
1604 |
/* satisfy input constraints */
|
1605 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1606 |
for(k = 0; k < nb_iargs; k++) { |
1607 |
i = def->sorted_args[nb_oargs + k]; |
1608 |
arg = args[i]; |
1609 |
arg_ct = &def->args_ct[i]; |
1610 |
ts = &s->temps[arg]; |
1611 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1612 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1613 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1614 |
ts->val_type = TEMP_VAL_REG; |
1615 |
ts->reg = reg; |
1616 |
ts->mem_coherent = 1;
|
1617 |
s->reg_to_temp[reg] = arg; |
1618 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1619 |
if (tcg_target_const_match(ts->val, arg_ct)) {
|
1620 |
/* constant is OK for instruction */
|
1621 |
const_args[i] = 1;
|
1622 |
new_args[i] = ts->val; |
1623 |
goto iarg_end;
|
1624 |
} else {
|
1625 |
/* need to move to a register */
|
1626 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1627 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1628 |
ts->val_type = TEMP_VAL_REG; |
1629 |
ts->reg = reg; |
1630 |
ts->mem_coherent = 0;
|
1631 |
s->reg_to_temp[reg] = arg; |
1632 |
} |
1633 |
} |
1634 |
assert(ts->val_type == TEMP_VAL_REG); |
1635 |
if (arg_ct->ct & TCG_CT_IALIAS) {
|
1636 |
if (ts->fixed_reg) {
|
1637 |
/* if fixed register, we must allocate a new register
|
1638 |
if the alias is not the same register */
|
1639 |
if (arg != args[arg_ct->alias_index])
|
1640 |
goto allocate_in_reg;
|
1641 |
} else {
|
1642 |
/* if the input is aliased to an output and if it is
|
1643 |
not dead after the instruction, we must allocate
|
1644 |
a new register and move it */
|
1645 |
if (!IS_DEAD_IARG(i - nb_oargs))
|
1646 |
goto allocate_in_reg;
|
1647 |
} |
1648 |
} |
1649 |
reg = ts->reg; |
1650 |
if (tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1651 |
/* nothing to do : the constraint is satisfied */
|
1652 |
} else {
|
1653 |
allocate_in_reg:
|
1654 |
/* allocate a new register matching the constraint
|
1655 |
and move the temporary register into it */
|
1656 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1657 |
tcg_out_mov(s, ts->type, reg, ts->reg); |
1658 |
} |
1659 |
new_args[i] = reg; |
1660 |
const_args[i] = 0;
|
1661 |
tcg_regset_set_reg(allocated_regs, reg); |
1662 |
iarg_end: ;
|
1663 |
} |
1664 |
|
1665 |
if (def->flags & TCG_OPF_BB_END) {
|
1666 |
tcg_reg_alloc_bb_end(s, allocated_regs); |
1667 |
} else {
|
1668 |
/* mark dead temporaries and free the associated registers */
|
1669 |
for(i = 0; i < nb_iargs; i++) { |
1670 |
arg = args[nb_oargs + i]; |
1671 |
if (IS_DEAD_IARG(i)) {
|
1672 |
ts = &s->temps[arg]; |
1673 |
if (!ts->fixed_reg) {
|
1674 |
if (ts->val_type == TEMP_VAL_REG)
|
1675 |
s->reg_to_temp[ts->reg] = -1;
|
1676 |
ts->val_type = TEMP_VAL_DEAD; |
1677 |
} |
1678 |
} |
1679 |
} |
1680 |
|
1681 |
if (def->flags & TCG_OPF_CALL_CLOBBER) {
|
1682 |
/* XXX: permit generic clobber register list ? */
|
1683 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1684 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1685 |
tcg_reg_free(s, reg); |
1686 |
} |
1687 |
} |
1688 |
/* XXX: for load/store we could do that only for the slow path
|
1689 |
(i.e. when a memory callback is called) */
|
1690 |
|
1691 |
/* store globals and free associated registers (we assume the insn
|
1692 |
can modify any global. */
|
1693 |
save_globals(s, allocated_regs); |
1694 |
} |
1695 |
|
1696 |
/* satisfy the output constraints */
|
1697 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1698 |
for(k = 0; k < nb_oargs; k++) { |
1699 |
i = def->sorted_args[k]; |
1700 |
arg = args[i]; |
1701 |
arg_ct = &def->args_ct[i]; |
1702 |
ts = &s->temps[arg]; |
1703 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
1704 |
reg = new_args[arg_ct->alias_index]; |
1705 |
} else {
|
1706 |
/* if fixed register, we try to use it */
|
1707 |
reg = ts->reg; |
1708 |
if (ts->fixed_reg &&
|
1709 |
tcg_regset_test_reg(arg_ct->u.regs, reg)) { |
1710 |
goto oarg_end;
|
1711 |
} |
1712 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1713 |
} |
1714 |
tcg_regset_set_reg(allocated_regs, reg); |
1715 |
/* if a fixed register is used, then a move will be done afterwards */
|
1716 |
if (!ts->fixed_reg) {
|
1717 |
if (ts->val_type == TEMP_VAL_REG)
|
1718 |
s->reg_to_temp[ts->reg] = -1;
|
1719 |
ts->val_type = TEMP_VAL_REG; |
1720 |
ts->reg = reg; |
1721 |
/* temp value is modified, so the value kept in memory is
|
1722 |
potentially not the same */
|
1723 |
ts->mem_coherent = 0;
|
1724 |
s->reg_to_temp[reg] = arg; |
1725 |
} |
1726 |
oarg_end:
|
1727 |
new_args[i] = reg; |
1728 |
} |
1729 |
} |
1730 |
|
1731 |
/* emit instruction */
|
1732 |
tcg_out_op(s, opc, new_args, const_args); |
1733 |
|
1734 |
/* move the outputs in the correct register if needed */
|
1735 |
for(i = 0; i < nb_oargs; i++) { |
1736 |
ts = &s->temps[args[i]]; |
1737 |
reg = new_args[i]; |
1738 |
if (ts->fixed_reg && ts->reg != reg) {
|
1739 |
tcg_out_mov(s, ts->type, ts->reg, reg); |
1740 |
} |
1741 |
} |
1742 |
} |
1743 |
|
1744 |
#ifdef TCG_TARGET_STACK_GROWSUP
|
1745 |
#define STACK_DIR(x) (-(x))
|
1746 |
#else
|
1747 |
#define STACK_DIR(x) (x)
|
1748 |
#endif
|
1749 |
|
1750 |
static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def, |
1751 |
TCGOpcode opc, const TCGArg *args,
|
1752 |
unsigned int dead_iargs) |
1753 |
{ |
1754 |
int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params;
|
1755 |
TCGArg arg, func_arg; |
1756 |
TCGTemp *ts; |
1757 |
tcg_target_long stack_offset, call_stack_size, func_addr; |
1758 |
int const_func_arg, allocate_args;
|
1759 |
TCGRegSet allocated_regs; |
1760 |
const TCGArgConstraint *arg_ct;
|
1761 |
|
1762 |
arg = *args++; |
1763 |
|
1764 |
nb_oargs = arg >> 16;
|
1765 |
nb_iargs = arg & 0xffff;
|
1766 |
nb_params = nb_iargs - 1;
|
1767 |
|
1768 |
flags = args[nb_oargs + nb_iargs]; |
1769 |
|
1770 |
nb_regs = tcg_target_get_call_iarg_regs_count(flags); |
1771 |
if (nb_regs > nb_params)
|
1772 |
nb_regs = nb_params; |
1773 |
|
1774 |
/* assign stack slots first */
|
1775 |
/* XXX: preallocate call stack */
|
1776 |
call_stack_size = (nb_params - nb_regs) * sizeof(tcg_target_long);
|
1777 |
call_stack_size = (call_stack_size + TCG_TARGET_STACK_ALIGN - 1) &
|
1778 |
~(TCG_TARGET_STACK_ALIGN - 1);
|
1779 |
allocate_args = (call_stack_size > TCG_STATIC_CALL_ARGS_SIZE); |
1780 |
if (allocate_args) {
|
1781 |
tcg_out_addi(s, TCG_REG_CALL_STACK, -STACK_DIR(call_stack_size)); |
1782 |
} |
1783 |
|
1784 |
stack_offset = TCG_TARGET_CALL_STACK_OFFSET; |
1785 |
for(i = nb_regs; i < nb_params; i++) {
|
1786 |
arg = args[nb_oargs + i]; |
1787 |
#ifdef TCG_TARGET_STACK_GROWSUP
|
1788 |
stack_offset -= sizeof(tcg_target_long);
|
1789 |
#endif
|
1790 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1791 |
ts = &s->temps[arg]; |
1792 |
if (ts->val_type == TEMP_VAL_REG) {
|
1793 |
tcg_out_st(s, ts->type, ts->reg, TCG_REG_CALL_STACK, stack_offset); |
1794 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1795 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1796 |
s->reserved_regs); |
1797 |
/* XXX: not correct if reading values from the stack */
|
1798 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1799 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1800 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1801 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1802 |
s->reserved_regs); |
1803 |
/* XXX: sign extend may be needed on some targets */
|
1804 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1805 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1806 |
} else {
|
1807 |
tcg_abort(); |
1808 |
} |
1809 |
} |
1810 |
#ifndef TCG_TARGET_STACK_GROWSUP
|
1811 |
stack_offset += sizeof(tcg_target_long);
|
1812 |
#endif
|
1813 |
} |
1814 |
|
1815 |
/* assign input registers */
|
1816 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1817 |
for(i = 0; i < nb_regs; i++) { |
1818 |
arg = args[nb_oargs + i]; |
1819 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1820 |
ts = &s->temps[arg]; |
1821 |
reg = tcg_target_call_iarg_regs[i]; |
1822 |
tcg_reg_free(s, reg); |
1823 |
if (ts->val_type == TEMP_VAL_REG) {
|
1824 |
if (ts->reg != reg) {
|
1825 |
tcg_out_mov(s, ts->type, reg, ts->reg); |
1826 |
} |
1827 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1828 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1829 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1830 |
/* XXX: sign extend ? */
|
1831 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1832 |
} else {
|
1833 |
tcg_abort(); |
1834 |
} |
1835 |
tcg_regset_set_reg(allocated_regs, reg); |
1836 |
} |
1837 |
} |
1838 |
|
1839 |
/* assign function address */
|
1840 |
func_arg = args[nb_oargs + nb_iargs - 1];
|
1841 |
arg_ct = &def->args_ct[0];
|
1842 |
ts = &s->temps[func_arg]; |
1843 |
func_addr = ts->val; |
1844 |
const_func_arg = 0;
|
1845 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1846 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1847 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1848 |
func_arg = reg; |
1849 |
tcg_regset_set_reg(allocated_regs, reg); |
1850 |
} else if (ts->val_type == TEMP_VAL_REG) { |
1851 |
reg = ts->reg; |
1852 |
if (!tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1853 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1854 |
tcg_out_mov(s, ts->type, reg, ts->reg); |
1855 |
} |
1856 |
func_arg = reg; |
1857 |
tcg_regset_set_reg(allocated_regs, reg); |
1858 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1859 |
if (tcg_target_const_match(func_addr, arg_ct)) {
|
1860 |
const_func_arg = 1;
|
1861 |
func_arg = func_addr; |
1862 |
} else {
|
1863 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1864 |
tcg_out_movi(s, ts->type, reg, func_addr); |
1865 |
func_arg = reg; |
1866 |
tcg_regset_set_reg(allocated_regs, reg); |
1867 |
} |
1868 |
} else {
|
1869 |
tcg_abort(); |
1870 |
} |
1871 |
|
1872 |
|
1873 |
/* mark dead temporaries and free the associated registers */
|
1874 |
for(i = 0; i < nb_iargs; i++) { |
1875 |
arg = args[nb_oargs + i]; |
1876 |
if (IS_DEAD_IARG(i)) {
|
1877 |
ts = &s->temps[arg]; |
1878 |
if (!ts->fixed_reg) {
|
1879 |
if (ts->val_type == TEMP_VAL_REG)
|
1880 |
s->reg_to_temp[ts->reg] = -1;
|
1881 |
ts->val_type = TEMP_VAL_DEAD; |
1882 |
} |
1883 |
} |
1884 |
} |
1885 |
|
1886 |
/* clobber call registers */
|
1887 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1888 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1889 |
tcg_reg_free(s, reg); |
1890 |
} |
1891 |
} |
1892 |
|
1893 |
/* store globals and free associated registers (we assume the call
|
1894 |
can modify any global. */
|
1895 |
if (!(flags & TCG_CALL_CONST)) {
|
1896 |
save_globals(s, allocated_regs); |
1897 |
} |
1898 |
|
1899 |
tcg_out_op(s, opc, &func_arg, &const_func_arg); |
1900 |
|
1901 |
if (allocate_args) {
|
1902 |
tcg_out_addi(s, TCG_REG_CALL_STACK, STACK_DIR(call_stack_size)); |
1903 |
} |
1904 |
|
1905 |
/* assign output registers and emit moves if needed */
|
1906 |
for(i = 0; i < nb_oargs; i++) { |
1907 |
arg = args[i]; |
1908 |
ts = &s->temps[arg]; |
1909 |
reg = tcg_target_call_oarg_regs[i]; |
1910 |
assert(s->reg_to_temp[reg] == -1);
|
1911 |
if (ts->fixed_reg) {
|
1912 |
if (ts->reg != reg) {
|
1913 |
tcg_out_mov(s, ts->type, ts->reg, reg); |
1914 |
} |
1915 |
} else {
|
1916 |
if (ts->val_type == TEMP_VAL_REG)
|
1917 |
s->reg_to_temp[ts->reg] = -1;
|
1918 |
ts->val_type = TEMP_VAL_REG; |
1919 |
ts->reg = reg; |
1920 |
ts->mem_coherent = 0;
|
1921 |
s->reg_to_temp[reg] = arg; |
1922 |
} |
1923 |
} |
1924 |
|
1925 |
return nb_iargs + nb_oargs + def->nb_cargs + 1; |
1926 |
} |
1927 |
|
1928 |
#ifdef CONFIG_PROFILER
|
1929 |
|
1930 |
static int64_t tcg_table_op_count[NB_OPS];
|
1931 |
|
1932 |
static void dump_op_count(void) |
1933 |
{ |
1934 |
int i;
|
1935 |
FILE *f; |
1936 |
f = fopen("/tmp/op.log", "w"); |
1937 |
for(i = INDEX_op_end; i < NB_OPS; i++) {
|
1938 |
fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, tcg_table_op_count[i]); |
1939 |
} |
1940 |
fclose(f); |
1941 |
} |
1942 |
#endif
|
1943 |
|
1944 |
|
1945 |
static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, |
1946 |
long search_pc)
|
1947 |
{ |
1948 |
TCGOpcode opc; |
1949 |
int op_index;
|
1950 |
const TCGOpDef *def;
|
1951 |
unsigned int dead_iargs; |
1952 |
const TCGArg *args;
|
1953 |
|
1954 |
#ifdef DEBUG_DISAS
|
1955 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) {
|
1956 |
qemu_log("OP:\n");
|
1957 |
tcg_dump_ops(s, logfile); |
1958 |
qemu_log("\n");
|
1959 |
} |
1960 |
#endif
|
1961 |
|
1962 |
#ifdef CONFIG_PROFILER
|
1963 |
s->la_time -= profile_getclock(); |
1964 |
#endif
|
1965 |
tcg_liveness_analysis(s); |
1966 |
#ifdef CONFIG_PROFILER
|
1967 |
s->la_time += profile_getclock(); |
1968 |
#endif
|
1969 |
|
1970 |
#ifdef DEBUG_DISAS
|
1971 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP_OPT))) {
|
1972 |
qemu_log("OP after liveness analysis:\n");
|
1973 |
tcg_dump_ops(s, logfile); |
1974 |
qemu_log("\n");
|
1975 |
} |
1976 |
#endif
|
1977 |
|
1978 |
tcg_reg_alloc_start(s); |
1979 |
|
1980 |
s->code_buf = gen_code_buf; |
1981 |
s->code_ptr = gen_code_buf; |
1982 |
|
1983 |
args = gen_opparam_buf; |
1984 |
op_index = 0;
|
1985 |
|
1986 |
for(;;) {
|
1987 |
opc = gen_opc_buf[op_index]; |
1988 |
#ifdef CONFIG_PROFILER
|
1989 |
tcg_table_op_count[opc]++; |
1990 |
#endif
|
1991 |
def = &tcg_op_defs[opc]; |
1992 |
#if 0
|
1993 |
printf("%s: %d %d %d\n", def->name,
|
1994 |
def->nb_oargs, def->nb_iargs, def->nb_cargs);
|
1995 |
// dump_regs(s);
|
1996 |
#endif
|
1997 |
switch(opc) {
|
1998 |
case INDEX_op_mov_i32:
|
1999 |
#if TCG_TARGET_REG_BITS == 64 |
2000 |
case INDEX_op_mov_i64:
|
2001 |
#endif
|
2002 |
dead_iargs = s->op_dead_iargs[op_index]; |
2003 |
tcg_reg_alloc_mov(s, def, args, dead_iargs); |
2004 |
break;
|
2005 |
case INDEX_op_movi_i32:
|
2006 |
#if TCG_TARGET_REG_BITS == 64 |
2007 |
case INDEX_op_movi_i64:
|
2008 |
#endif
|
2009 |
tcg_reg_alloc_movi(s, args); |
2010 |
break;
|
2011 |
case INDEX_op_debug_insn_start:
|
2012 |
/* debug instruction */
|
2013 |
break;
|
2014 |
case INDEX_op_nop:
|
2015 |
case INDEX_op_nop1:
|
2016 |
case INDEX_op_nop2:
|
2017 |
case INDEX_op_nop3:
|
2018 |
break;
|
2019 |
case INDEX_op_nopn:
|
2020 |
args += args[0];
|
2021 |
goto next;
|
2022 |
case INDEX_op_discard:
|
2023 |
{ |
2024 |
TCGTemp *ts; |
2025 |
ts = &s->temps[args[0]];
|
2026 |
/* mark the temporary as dead */
|
2027 |
if (!ts->fixed_reg) {
|
2028 |
if (ts->val_type == TEMP_VAL_REG)
|
2029 |
s->reg_to_temp[ts->reg] = -1;
|
2030 |
ts->val_type = TEMP_VAL_DEAD; |
2031 |
} |
2032 |
} |
2033 |
break;
|
2034 |
case INDEX_op_set_label:
|
2035 |
tcg_reg_alloc_bb_end(s, s->reserved_regs); |
2036 |
tcg_out_label(s, args[0], (long)s->code_ptr); |
2037 |
break;
|
2038 |
case INDEX_op_call:
|
2039 |
dead_iargs = s->op_dead_iargs[op_index]; |
2040 |
args += tcg_reg_alloc_call(s, def, opc, args, dead_iargs); |
2041 |
goto next;
|
2042 |
case INDEX_op_end:
|
2043 |
goto the_end;
|
2044 |
default:
|
2045 |
/* Note: in order to speed up the code, it would be much
|
2046 |
faster to have specialized register allocator functions for
|
2047 |
some common argument patterns */
|
2048 |
dead_iargs = s->op_dead_iargs[op_index]; |
2049 |
tcg_reg_alloc_op(s, def, opc, args, dead_iargs); |
2050 |
break;
|
2051 |
} |
2052 |
args += def->nb_args; |
2053 |
next:
|
2054 |
if (search_pc >= 0 && search_pc < s->code_ptr - gen_code_buf) { |
2055 |
return op_index;
|
2056 |
} |
2057 |
op_index++; |
2058 |
#ifndef NDEBUG
|
2059 |
check_regs(s); |
2060 |
#endif
|
2061 |
} |
2062 |
the_end:
|
2063 |
return -1; |
2064 |
} |
2065 |
|
2066 |
int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf)
|
2067 |
{ |
2068 |
#ifdef CONFIG_PROFILER
|
2069 |
{ |
2070 |
int n;
|
2071 |
n = (gen_opc_ptr - gen_opc_buf); |
2072 |
s->op_count += n; |
2073 |
if (n > s->op_count_max)
|
2074 |
s->op_count_max = n; |
2075 |
|
2076 |
s->temp_count += s->nb_temps; |
2077 |
if (s->nb_temps > s->temp_count_max)
|
2078 |
s->temp_count_max = s->nb_temps; |
2079 |
} |
2080 |
#endif
|
2081 |
|
2082 |
tcg_gen_code_common(s, gen_code_buf, -1);
|
2083 |
|
2084 |
/* flush instruction cache */
|
2085 |
flush_icache_range((unsigned long)gen_code_buf, |
2086 |
(unsigned long)s->code_ptr); |
2087 |
return s->code_ptr - gen_code_buf;
|
2088 |
} |
2089 |
|
2090 |
/* Return the index of the micro operation such as the pc after is <
|
2091 |
offset bytes from the start of the TB. The contents of gen_code_buf must
|
2092 |
not be changed, though writing the same values is ok.
|
2093 |
Return -1 if not found. */
|
2094 |
int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset) |
2095 |
{ |
2096 |
return tcg_gen_code_common(s, gen_code_buf, offset);
|
2097 |
} |
2098 |
|
2099 |
#ifdef CONFIG_PROFILER
|
2100 |
void tcg_dump_info(FILE *f,
|
2101 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
2102 |
{ |
2103 |
TCGContext *s = &tcg_ctx; |
2104 |
int64_t tot; |
2105 |
|
2106 |
tot = s->interm_time + s->code_time; |
2107 |
cpu_fprintf(f, "JIT cycles %" PRId64 " (%0.3f s at 2.4 GHz)\n", |
2108 |
tot, tot / 2.4e9); |
2109 |
cpu_fprintf(f, "translated TBs %" PRId64 " (aborted=%" PRId64 " %0.1f%%)\n", |
2110 |
s->tb_count, |
2111 |
s->tb_count1 - s->tb_count, |
2112 |
s->tb_count1 ? (double)(s->tb_count1 - s->tb_count) / s->tb_count1 * 100.0 : 0); |
2113 |
cpu_fprintf(f, "avg ops/TB %0.1f max=%d\n",
|
2114 |
s->tb_count ? (double)s->op_count / s->tb_count : 0, s->op_count_max); |
2115 |
cpu_fprintf(f, "deleted ops/TB %0.2f\n",
|
2116 |
s->tb_count ? |
2117 |
(double)s->del_op_count / s->tb_count : 0); |
2118 |
cpu_fprintf(f, "avg temps/TB %0.2f max=%d\n",
|
2119 |
s->tb_count ? |
2120 |
(double)s->temp_count / s->tb_count : 0, |
2121 |
s->temp_count_max); |
2122 |
|
2123 |
cpu_fprintf(f, "cycles/op %0.1f\n",
|
2124 |
s->op_count ? (double)tot / s->op_count : 0); |
2125 |
cpu_fprintf(f, "cycles/in byte %0.1f\n",
|
2126 |
s->code_in_len ? (double)tot / s->code_in_len : 0); |
2127 |
cpu_fprintf(f, "cycles/out byte %0.1f\n",
|
2128 |
s->code_out_len ? (double)tot / s->code_out_len : 0); |
2129 |
if (tot == 0) |
2130 |
tot = 1;
|
2131 |
cpu_fprintf(f, " gen_interm time %0.1f%%\n",
|
2132 |
(double)s->interm_time / tot * 100.0); |
2133 |
cpu_fprintf(f, " gen_code time %0.1f%%\n",
|
2134 |
(double)s->code_time / tot * 100.0); |
2135 |
cpu_fprintf(f, "liveness/code time %0.1f%%\n",
|
2136 |
(double)s->la_time / (s->code_time ? s->code_time : 1) * 100.0); |
2137 |
cpu_fprintf(f, "cpu_restore count %" PRId64 "\n", |
2138 |
s->restore_count); |
2139 |
cpu_fprintf(f, " avg cycles %0.1f\n",
|
2140 |
s->restore_count ? (double)s->restore_time / s->restore_count : 0); |
2141 |
|
2142 |
dump_op_count(); |
2143 |
} |
2144 |
#else
|
2145 |
void tcg_dump_info(FILE *f,
|
2146 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
2147 |
{ |
2148 |
cpu_fprintf(f, "[TCG profiler not compiled]\n");
|
2149 |
} |
2150 |
#endif
|