root / tcg / tcg.c @ 641d5fbe
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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 suppress various consistency checks (faster) */
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#define NDEBUG
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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 <assert.h> |
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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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#include "config.h" |
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#include "qemu-common.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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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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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, iargs, oargs, cargs, flags) { #s, iargs, oargs, 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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TCGRegSet tcg_target_available_regs[2];
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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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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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/* free all the pool */
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void tcg_pool_free(TCGContext *s)
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{ |
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TCGPool *p, *p1; |
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for(p = s->pool_first; p != NULL; p = p1) { |
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p1 = p->next; |
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qemu_free(p); |
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} |
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s->pool_first = NULL;
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s->pool_cur = s->pool_end = 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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/* 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_set_macro_func(TCGContext *s, TCGMacroFunc *func)
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{ |
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s->macro_func = func; |
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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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TCGv tcg_global_reg_new(TCGType type, int reg, 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 MAKE_TCGV(idx);
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} |
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#if TCG_TARGET_REG_BITS == 32 |
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/* temporary hack to avoid register shortage for tcg_qemu_st64() */
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TCGv tcg_global_reg2_new_hack(TCGType type, int reg1, int reg2, |
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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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char buf[64]; |
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if (type != TCG_TYPE_I64)
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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 + 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 = 1;
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ts->reg = reg1; |
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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 = 1;
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ts->reg = reg2; |
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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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return MAKE_TCGV(idx);
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} |
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#endif
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TCGv tcg_global_mem_new(TCGType type, int reg, 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 |
359 |
if (type == TCG_TYPE_I64) {
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char buf[64]; |
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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 = 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; |
385 |
#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"); |
390 |
ts->name = strdup(buf); |
391 |
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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; |
403 |
ts->mem_offset = offset; |
404 |
ts->name = name; |
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s->nb_globals++; |
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} |
407 |
return MAKE_TCGV(idx);
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} |
409 |
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TCGv 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; |
417 |
if (temp_local)
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k += TCG_TYPE_COUNT; |
419 |
idx = s->first_free_temp[k]; |
420 |
if (idx != -1) { |
421 |
/* There is already an available temp with the
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right type */
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ts = &s->temps[idx]; |
424 |
s->first_free_temp[k] = ts->next_free_temp; |
425 |
ts->temp_allocated = 1;
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assert(ts->temp_local == temp_local); |
427 |
} else {
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idx = s->nb_temps; |
429 |
#if TCG_TARGET_REG_BITS == 32 |
430 |
if (type == TCG_TYPE_I64) {
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tcg_temp_alloc(s, s->nb_temps + 1);
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ts = &s->temps[s->nb_temps]; |
433 |
ts->base_type = type; |
434 |
ts->type = TCG_TYPE_I32; |
435 |
ts->temp_allocated = 1;
|
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ts->temp_local = temp_local; |
437 |
ts->name = NULL;
|
438 |
ts++; |
439 |
ts->base_type = TCG_TYPE_I32; |
440 |
ts->type = TCG_TYPE_I32; |
441 |
ts->temp_allocated = 1;
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442 |
ts->temp_local = temp_local; |
443 |
ts->name = NULL;
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444 |
s->nb_temps += 2;
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445 |
} else
|
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#endif
|
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{ |
448 |
tcg_temp_alloc(s, s->nb_temps + 1);
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ts = &s->temps[s->nb_temps]; |
450 |
ts->base_type = type; |
451 |
ts->type = type; |
452 |
ts->temp_allocated = 1;
|
453 |
ts->temp_local = temp_local; |
454 |
ts->name = NULL;
|
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s->nb_temps++; |
456 |
} |
457 |
} |
458 |
return MAKE_TCGV(idx);
|
459 |
} |
460 |
|
461 |
void tcg_temp_free(TCGv arg)
|
462 |
{ |
463 |
TCGContext *s = &tcg_ctx; |
464 |
TCGTemp *ts; |
465 |
int idx = GET_TCGV(arg);
|
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int k;
|
467 |
|
468 |
assert(idx >= s->nb_globals && idx < s->nb_temps); |
469 |
ts = &s->temps[idx]; |
470 |
assert(ts->temp_allocated != 0);
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471 |
ts->temp_allocated = 0;
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k = ts->base_type; |
473 |
if (ts->temp_local)
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k += TCG_TYPE_COUNT; |
475 |
ts->next_free_temp = s->first_free_temp[k]; |
476 |
s->first_free_temp[k] = idx; |
477 |
} |
478 |
|
479 |
|
480 |
TCGv tcg_const_i32(int32_t val) |
481 |
{ |
482 |
TCGv t0; |
483 |
t0 = tcg_temp_new(TCG_TYPE_I32); |
484 |
tcg_gen_movi_i32(t0, val); |
485 |
return t0;
|
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} |
487 |
|
488 |
TCGv tcg_const_i64(int64_t val) |
489 |
{ |
490 |
TCGv t0; |
491 |
t0 = tcg_temp_new(TCG_TYPE_I64); |
492 |
tcg_gen_movi_i64(t0, val); |
493 |
return t0;
|
494 |
} |
495 |
|
496 |
void tcg_register_helper(void *func, const char *name) |
497 |
{ |
498 |
TCGContext *s = &tcg_ctx; |
499 |
int n;
|
500 |
if ((s->nb_helpers + 1) > s->allocated_helpers) { |
501 |
n = s->allocated_helpers; |
502 |
if (n == 0) { |
503 |
n = 4;
|
504 |
} else {
|
505 |
n *= 2;
|
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} |
507 |
s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo));
|
508 |
s->allocated_helpers = n; |
509 |
} |
510 |
s->helpers[s->nb_helpers].func = (tcg_target_ulong)func; |
511 |
s->helpers[s->nb_helpers].name = name; |
512 |
s->nb_helpers++; |
513 |
} |
514 |
|
515 |
static inline TCGType tcg_get_base_type(TCGContext *s, TCGv arg) |
516 |
{ |
517 |
return s->temps[GET_TCGV(arg)].base_type;
|
518 |
} |
519 |
|
520 |
static void tcg_gen_call_internal(TCGContext *s, TCGv func, |
521 |
unsigned int flags, |
522 |
unsigned int nb_rets, const TCGv *rets, |
523 |
unsigned int nb_params, const TCGv *params) |
524 |
{ |
525 |
int i;
|
526 |
*gen_opc_ptr++ = INDEX_op_call; |
527 |
*gen_opparam_ptr++ = (nb_rets << 16) | (nb_params + 1); |
528 |
for(i = 0; i < nb_rets; i++) { |
529 |
*gen_opparam_ptr++ = GET_TCGV(rets[i]); |
530 |
} |
531 |
for(i = 0; i < nb_params; i++) { |
532 |
*gen_opparam_ptr++ = GET_TCGV(params[i]); |
533 |
} |
534 |
*gen_opparam_ptr++ = GET_TCGV(func); |
535 |
|
536 |
*gen_opparam_ptr++ = flags; |
537 |
/* total parameters, needed to go backward in the instruction stream */
|
538 |
*gen_opparam_ptr++ = 1 + nb_rets + nb_params + 3; |
539 |
} |
540 |
|
541 |
|
542 |
#if TCG_TARGET_REG_BITS < 64 |
543 |
/* Note: we convert the 64 bit args to 32 bit and do some alignment
|
544 |
and endian swap. Maybe it would be better to do the alignment
|
545 |
and endian swap in tcg_reg_alloc_call(). */
|
546 |
void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags, |
547 |
unsigned int nb_rets, const TCGv *rets, |
548 |
unsigned int nb_params, const TCGv *args1) |
549 |
{ |
550 |
TCGv ret, *args2, rets_2[2], arg;
|
551 |
int j, i, call_type;
|
552 |
|
553 |
if (nb_rets == 1) { |
554 |
ret = rets[0];
|
555 |
if (tcg_get_base_type(s, ret) == TCG_TYPE_I64) {
|
556 |
nb_rets = 2;
|
557 |
#ifdef TCG_TARGET_WORDS_BIGENDIAN
|
558 |
rets_2[0] = TCGV_HIGH(ret);
|
559 |
rets_2[1] = ret;
|
560 |
#else
|
561 |
rets_2[0] = ret;
|
562 |
rets_2[1] = TCGV_HIGH(ret);
|
563 |
#endif
|
564 |
rets = rets_2; |
565 |
} |
566 |
} |
567 |
args2 = alloca((nb_params * 3) * sizeof(TCGv)); |
568 |
j = 0;
|
569 |
call_type = (flags & TCG_CALL_TYPE_MASK); |
570 |
for(i = 0; i < nb_params; i++) { |
571 |
arg = args1[i]; |
572 |
if (tcg_get_base_type(s, arg) == TCG_TYPE_I64) {
|
573 |
#ifdef TCG_TARGET_I386
|
574 |
/* REGPARM case: if the third parameter is 64 bit, it is
|
575 |
allocated on the stack */
|
576 |
if (j == 2 && call_type == TCG_CALL_TYPE_REGPARM) { |
577 |
call_type = TCG_CALL_TYPE_REGPARM_2; |
578 |
flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type; |
579 |
} |
580 |
args2[j++] = arg; |
581 |
args2[j++] = TCGV_HIGH(arg); |
582 |
#else
|
583 |
#ifdef TCG_TARGET_CALL_ALIGN_ARGS
|
584 |
/* some targets want aligned 64 bit args */
|
585 |
if (j & 1) { |
586 |
args2[j++] = TCG_CALL_DUMMY_ARG; |
587 |
} |
588 |
#endif
|
589 |
#ifdef TCG_TARGET_WORDS_BIGENDIAN
|
590 |
args2[j++] = TCGV_HIGH(arg); |
591 |
args2[j++] = arg; |
592 |
#else
|
593 |
args2[j++] = arg; |
594 |
args2[j++] = TCGV_HIGH(arg); |
595 |
#endif
|
596 |
#endif
|
597 |
} else {
|
598 |
args2[j++] = arg; |
599 |
} |
600 |
} |
601 |
tcg_gen_call_internal(s, func, flags, |
602 |
nb_rets, rets, j, args2); |
603 |
} |
604 |
#else
|
605 |
void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags, |
606 |
unsigned int nb_rets, const TCGv *rets, |
607 |
unsigned int nb_params, const TCGv *args1) |
608 |
{ |
609 |
tcg_gen_call_internal(s, func, flags, |
610 |
nb_rets, rets, nb_params, args1); |
611 |
} |
612 |
#endif
|
613 |
|
614 |
#if TCG_TARGET_REG_BITS == 32 |
615 |
void tcg_gen_shifti_i64(TCGv ret, TCGv arg1,
|
616 |
int c, int right, int arith) |
617 |
{ |
618 |
if (c == 0) { |
619 |
tcg_gen_mov_i32(ret, arg1); |
620 |
tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1)); |
621 |
} else if (c >= 32) { |
622 |
c -= 32;
|
623 |
if (right) {
|
624 |
if (arith) {
|
625 |
tcg_gen_sari_i32(ret, TCGV_HIGH(arg1), c); |
626 |
tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
|
627 |
} else {
|
628 |
tcg_gen_shri_i32(ret, TCGV_HIGH(arg1), c); |
629 |
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
|
630 |
} |
631 |
} else {
|
632 |
tcg_gen_shli_i32(TCGV_HIGH(ret), arg1, c); |
633 |
tcg_gen_movi_i32(ret, 0);
|
634 |
} |
635 |
} else {
|
636 |
TCGv t0, t1; |
637 |
|
638 |
t0 = tcg_temp_new(TCG_TYPE_I32); |
639 |
t1 = tcg_temp_new(TCG_TYPE_I32); |
640 |
if (right) {
|
641 |
tcg_gen_shli_i32(t0, TCGV_HIGH(arg1), 32 - c);
|
642 |
if (arith)
|
643 |
tcg_gen_sari_i32(t1, TCGV_HIGH(arg1), c); |
644 |
else
|
645 |
tcg_gen_shri_i32(t1, TCGV_HIGH(arg1), c); |
646 |
tcg_gen_shri_i32(ret, arg1, c); |
647 |
tcg_gen_or_i32(ret, ret, t0); |
648 |
tcg_gen_mov_i32(TCGV_HIGH(ret), t1); |
649 |
} else {
|
650 |
tcg_gen_shri_i32(t0, arg1, 32 - c);
|
651 |
/* Note: ret can be the same as arg1, so we use t1 */
|
652 |
tcg_gen_shli_i32(t1, arg1, c); |
653 |
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c); |
654 |
tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t0); |
655 |
tcg_gen_mov_i32(ret, t1); |
656 |
} |
657 |
tcg_temp_free(t0); |
658 |
tcg_temp_free(t1); |
659 |
} |
660 |
} |
661 |
#endif
|
662 |
|
663 |
void tcg_reg_alloc_start(TCGContext *s)
|
664 |
{ |
665 |
int i;
|
666 |
TCGTemp *ts; |
667 |
for(i = 0; i < s->nb_globals; i++) { |
668 |
ts = &s->temps[i]; |
669 |
if (ts->fixed_reg) {
|
670 |
ts->val_type = TEMP_VAL_REG; |
671 |
} else {
|
672 |
ts->val_type = TEMP_VAL_MEM; |
673 |
} |
674 |
} |
675 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
676 |
ts = &s->temps[i]; |
677 |
ts->val_type = TEMP_VAL_DEAD; |
678 |
ts->mem_allocated = 0;
|
679 |
ts->fixed_reg = 0;
|
680 |
} |
681 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
682 |
s->reg_to_temp[i] = -1;
|
683 |
} |
684 |
} |
685 |
|
686 |
static char *tcg_get_arg_str_idx(TCGContext *s, char *buf, int buf_size, |
687 |
int idx)
|
688 |
{ |
689 |
TCGTemp *ts; |
690 |
|
691 |
ts = &s->temps[idx]; |
692 |
if (idx < s->nb_globals) {
|
693 |
pstrcpy(buf, buf_size, ts->name); |
694 |
} else {
|
695 |
if (ts->temp_local)
|
696 |
snprintf(buf, buf_size, "loc%d", idx - s->nb_globals);
|
697 |
else
|
698 |
snprintf(buf, buf_size, "tmp%d", idx - s->nb_globals);
|
699 |
} |
700 |
return buf;
|
701 |
} |
702 |
|
703 |
char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGv arg) |
704 |
{ |
705 |
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV(arg));
|
706 |
} |
707 |
|
708 |
static int helper_cmp(const void *p1, const void *p2) |
709 |
{ |
710 |
const TCGHelperInfo *th1 = p1;
|
711 |
const TCGHelperInfo *th2 = p2;
|
712 |
if (th1->func < th2->func)
|
713 |
return -1; |
714 |
else if (th1->func == th2->func) |
715 |
return 0; |
716 |
else
|
717 |
return 1; |
718 |
} |
719 |
|
720 |
/* find helper definition (Note: A hash table would be better) */
|
721 |
static TCGHelperInfo *tcg_find_helper(TCGContext *s, tcg_target_ulong val)
|
722 |
{ |
723 |
int m, m_min, m_max;
|
724 |
TCGHelperInfo *th; |
725 |
tcg_target_ulong v; |
726 |
|
727 |
if (unlikely(!s->helpers_sorted)) {
|
728 |
qsort(s->helpers, s->nb_helpers, sizeof(TCGHelperInfo),
|
729 |
helper_cmp); |
730 |
s->helpers_sorted = 1;
|
731 |
} |
732 |
|
733 |
/* binary search */
|
734 |
m_min = 0;
|
735 |
m_max = s->nb_helpers - 1;
|
736 |
while (m_min <= m_max) {
|
737 |
m = (m_min + m_max) >> 1;
|
738 |
th = &s->helpers[m]; |
739 |
v = th->func; |
740 |
if (v == val)
|
741 |
return th;
|
742 |
else if (val < v) { |
743 |
m_max = m - 1;
|
744 |
} else {
|
745 |
m_min = m + 1;
|
746 |
} |
747 |
} |
748 |
return NULL; |
749 |
} |
750 |
|
751 |
void tcg_dump_ops(TCGContext *s, FILE *outfile)
|
752 |
{ |
753 |
const uint16_t *opc_ptr;
|
754 |
const TCGArg *args;
|
755 |
TCGArg arg; |
756 |
int c, i, k, nb_oargs, nb_iargs, nb_cargs, first_insn;
|
757 |
const TCGOpDef *def;
|
758 |
char buf[128]; |
759 |
|
760 |
first_insn = 1;
|
761 |
opc_ptr = gen_opc_buf; |
762 |
args = gen_opparam_buf; |
763 |
while (opc_ptr < gen_opc_ptr) {
|
764 |
c = *opc_ptr++; |
765 |
def = &tcg_op_defs[c]; |
766 |
if (c == INDEX_op_debug_insn_start) {
|
767 |
uint64_t pc; |
768 |
#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
|
769 |
pc = ((uint64_t)args[1] << 32) | args[0]; |
770 |
#else
|
771 |
pc = args[0];
|
772 |
#endif
|
773 |
if (!first_insn)
|
774 |
fprintf(outfile, "\n");
|
775 |
fprintf(outfile, " ---- 0x%" PRIx64, pc);
|
776 |
first_insn = 0;
|
777 |
nb_oargs = def->nb_oargs; |
778 |
nb_iargs = def->nb_iargs; |
779 |
nb_cargs = def->nb_cargs; |
780 |
} else if (c == INDEX_op_call) { |
781 |
TCGArg arg; |
782 |
|
783 |
/* variable number of arguments */
|
784 |
arg = *args++; |
785 |
nb_oargs = arg >> 16;
|
786 |
nb_iargs = arg & 0xffff;
|
787 |
nb_cargs = def->nb_cargs; |
788 |
|
789 |
fprintf(outfile, " %s ", def->name);
|
790 |
|
791 |
/* function name */
|
792 |
fprintf(outfile, "%s",
|
793 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + nb_iargs - 1])); |
794 |
/* flags */
|
795 |
fprintf(outfile, ",$0x%" TCG_PRIlx,
|
796 |
args[nb_oargs + nb_iargs]); |
797 |
/* nb out args */
|
798 |
fprintf(outfile, ",$%d", nb_oargs);
|
799 |
for(i = 0; i < nb_oargs; i++) { |
800 |
fprintf(outfile, ",");
|
801 |
fprintf(outfile, "%s",
|
802 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[i]));
|
803 |
} |
804 |
for(i = 0; i < (nb_iargs - 1); i++) { |
805 |
fprintf(outfile, ",");
|
806 |
if (args[nb_oargs + i] == TCG_CALL_DUMMY_ARG) {
|
807 |
fprintf(outfile, "<dummy>");
|
808 |
} else {
|
809 |
fprintf(outfile, "%s",
|
810 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + i]));
|
811 |
} |
812 |
} |
813 |
} else if (c == INDEX_op_movi_i32 |
814 |
#if TCG_TARGET_REG_BITS == 64 |
815 |
|| c == INDEX_op_movi_i64 |
816 |
#endif
|
817 |
) { |
818 |
tcg_target_ulong val; |
819 |
TCGHelperInfo *th; |
820 |
|
821 |
nb_oargs = def->nb_oargs; |
822 |
nb_iargs = def->nb_iargs; |
823 |
nb_cargs = def->nb_cargs; |
824 |
fprintf(outfile, " %s %s,$", def->name,
|
825 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[0])); |
826 |
val = args[1];
|
827 |
th = tcg_find_helper(s, val); |
828 |
if (th) {
|
829 |
fprintf(outfile, th->name); |
830 |
} else {
|
831 |
if (c == INDEX_op_movi_i32)
|
832 |
fprintf(outfile, "0x%x", (uint32_t)val);
|
833 |
else
|
834 |
fprintf(outfile, "0x%" PRIx64 , (uint64_t)val);
|
835 |
} |
836 |
} else {
|
837 |
fprintf(outfile, " %s ", def->name);
|
838 |
if (c == INDEX_op_nopn) {
|
839 |
/* variable number of arguments */
|
840 |
nb_cargs = *args; |
841 |
nb_oargs = 0;
|
842 |
nb_iargs = 0;
|
843 |
} else {
|
844 |
nb_oargs = def->nb_oargs; |
845 |
nb_iargs = def->nb_iargs; |
846 |
nb_cargs = def->nb_cargs; |
847 |
} |
848 |
|
849 |
k = 0;
|
850 |
for(i = 0; i < nb_oargs; i++) { |
851 |
if (k != 0) |
852 |
fprintf(outfile, ",");
|
853 |
fprintf(outfile, "%s",
|
854 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
855 |
} |
856 |
for(i = 0; i < nb_iargs; i++) { |
857 |
if (k != 0) |
858 |
fprintf(outfile, ",");
|
859 |
fprintf(outfile, "%s",
|
860 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
861 |
} |
862 |
for(i = 0; i < nb_cargs; i++) { |
863 |
if (k != 0) |
864 |
fprintf(outfile, ",");
|
865 |
arg = args[k++]; |
866 |
fprintf(outfile, "$0x%" TCG_PRIlx, arg);
|
867 |
} |
868 |
} |
869 |
fprintf(outfile, "\n");
|
870 |
args += nb_iargs + nb_oargs + nb_cargs; |
871 |
} |
872 |
} |
873 |
|
874 |
/* we give more priority to constraints with less registers */
|
875 |
static int get_constraint_priority(const TCGOpDef *def, int k) |
876 |
{ |
877 |
const TCGArgConstraint *arg_ct;
|
878 |
|
879 |
int i, n;
|
880 |
arg_ct = &def->args_ct[k]; |
881 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
882 |
/* an alias is equivalent to a single register */
|
883 |
n = 1;
|
884 |
} else {
|
885 |
if (!(arg_ct->ct & TCG_CT_REG))
|
886 |
return 0; |
887 |
n = 0;
|
888 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
889 |
if (tcg_regset_test_reg(arg_ct->u.regs, i))
|
890 |
n++; |
891 |
} |
892 |
} |
893 |
return TCG_TARGET_NB_REGS - n + 1; |
894 |
} |
895 |
|
896 |
/* sort from highest priority to lowest */
|
897 |
static void sort_constraints(TCGOpDef *def, int start, int n) |
898 |
{ |
899 |
int i, j, p1, p2, tmp;
|
900 |
|
901 |
for(i = 0; i < n; i++) |
902 |
def->sorted_args[start + i] = start + i; |
903 |
if (n <= 1) |
904 |
return;
|
905 |
for(i = 0; i < n - 1; i++) { |
906 |
for(j = i + 1; j < n; j++) { |
907 |
p1 = get_constraint_priority(def, def->sorted_args[start + i]); |
908 |
p2 = get_constraint_priority(def, def->sorted_args[start + j]); |
909 |
if (p1 < p2) {
|
910 |
tmp = def->sorted_args[start + i]; |
911 |
def->sorted_args[start + i] = def->sorted_args[start + j]; |
912 |
def->sorted_args[start + j] = tmp; |
913 |
} |
914 |
} |
915 |
} |
916 |
} |
917 |
|
918 |
void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs) |
919 |
{ |
920 |
int op;
|
921 |
TCGOpDef *def; |
922 |
const char *ct_str; |
923 |
int i, nb_args;
|
924 |
|
925 |
for(;;) {
|
926 |
if (tdefs->op < 0) |
927 |
break;
|
928 |
op = tdefs->op; |
929 |
assert(op >= 0 && op < NB_OPS);
|
930 |
def = &tcg_op_defs[op]; |
931 |
nb_args = def->nb_iargs + def->nb_oargs; |
932 |
for(i = 0; i < nb_args; i++) { |
933 |
ct_str = tdefs->args_ct_str[i]; |
934 |
tcg_regset_clear(def->args_ct[i].u.regs); |
935 |
def->args_ct[i].ct = 0;
|
936 |
if (ct_str[0] >= '0' && ct_str[0] <= '9') { |
937 |
int oarg;
|
938 |
oarg = ct_str[0] - '0'; |
939 |
assert(oarg < def->nb_oargs); |
940 |
assert(def->args_ct[oarg].ct & TCG_CT_REG); |
941 |
/* TCG_CT_ALIAS is for the output arguments. The input
|
942 |
argument is tagged with TCG_CT_IALIAS. */
|
943 |
def->args_ct[i] = def->args_ct[oarg]; |
944 |
def->args_ct[oarg].ct = TCG_CT_ALIAS; |
945 |
def->args_ct[oarg].alias_index = i; |
946 |
def->args_ct[i].ct |= TCG_CT_IALIAS; |
947 |
def->args_ct[i].alias_index = oarg; |
948 |
} else {
|
949 |
for(;;) {
|
950 |
if (*ct_str == '\0') |
951 |
break;
|
952 |
switch(*ct_str) {
|
953 |
case 'i': |
954 |
def->args_ct[i].ct |= TCG_CT_CONST; |
955 |
ct_str++; |
956 |
break;
|
957 |
default:
|
958 |
if (target_parse_constraint(&def->args_ct[i], &ct_str) < 0) { |
959 |
fprintf(stderr, "Invalid constraint '%s' for arg %d of operation '%s'\n",
|
960 |
ct_str, i, def->name); |
961 |
exit(1);
|
962 |
} |
963 |
} |
964 |
} |
965 |
} |
966 |
} |
967 |
|
968 |
/* sort the constraints (XXX: this is just an heuristic) */
|
969 |
sort_constraints(def, 0, def->nb_oargs);
|
970 |
sort_constraints(def, def->nb_oargs, def->nb_iargs); |
971 |
|
972 |
#if 0
|
973 |
{
|
974 |
int i;
|
975 |
|
976 |
printf("%s: sorted=", def->name);
|
977 |
for(i = 0; i < def->nb_oargs + def->nb_iargs; i++)
|
978 |
printf(" %d", def->sorted_args[i]);
|
979 |
printf("\n");
|
980 |
}
|
981 |
#endif
|
982 |
tdefs++; |
983 |
} |
984 |
|
985 |
} |
986 |
|
987 |
#ifdef USE_LIVENESS_ANALYSIS
|
988 |
|
989 |
/* set a nop for an operation using 'nb_args' */
|
990 |
static inline void tcg_set_nop(TCGContext *s, uint16_t *opc_ptr, |
991 |
TCGArg *args, int nb_args)
|
992 |
{ |
993 |
if (nb_args == 0) { |
994 |
*opc_ptr = INDEX_op_nop; |
995 |
} else {
|
996 |
*opc_ptr = INDEX_op_nopn; |
997 |
args[0] = nb_args;
|
998 |
args[nb_args - 1] = nb_args;
|
999 |
} |
1000 |
} |
1001 |
|
1002 |
/* liveness analysis: end of function: globals are live, temps are
|
1003 |
dead. */
|
1004 |
/* XXX: at this stage, not used as there would be little gains because
|
1005 |
most TBs end with a conditional jump. */
|
1006 |
static inline void tcg_la_func_end(TCGContext *s, uint8_t *dead_temps) |
1007 |
{ |
1008 |
memset(dead_temps, 0, s->nb_globals);
|
1009 |
memset(dead_temps + s->nb_globals, 1, s->nb_temps - s->nb_globals);
|
1010 |
} |
1011 |
|
1012 |
/* liveness analysis: end of basic block: globals are live, temps are
|
1013 |
dead, local temps are live. */
|
1014 |
static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps) |
1015 |
{ |
1016 |
int i;
|
1017 |
TCGTemp *ts; |
1018 |
|
1019 |
memset(dead_temps, 0, s->nb_globals);
|
1020 |
ts = &s->temps[s->nb_globals]; |
1021 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
1022 |
if (ts->temp_local)
|
1023 |
dead_temps[i] = 0;
|
1024 |
else
|
1025 |
dead_temps[i] = 1;
|
1026 |
ts++; |
1027 |
} |
1028 |
} |
1029 |
|
1030 |
/* Liveness analysis : update the opc_dead_iargs array to tell if a
|
1031 |
given input arguments is dead. Instructions updating dead
|
1032 |
temporaries are removed. */
|
1033 |
void tcg_liveness_analysis(TCGContext *s)
|
1034 |
{ |
1035 |
int i, op_index, op, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
|
1036 |
TCGArg *args; |
1037 |
const TCGOpDef *def;
|
1038 |
uint8_t *dead_temps; |
1039 |
unsigned int dead_iargs; |
1040 |
|
1041 |
gen_opc_ptr++; /* skip end */
|
1042 |
|
1043 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
1044 |
|
1045 |
/* XXX: make it really dynamic */
|
1046 |
s->op_dead_iargs = tcg_malloc(OPC_BUF_SIZE * sizeof(uint16_t));
|
1047 |
|
1048 |
dead_temps = tcg_malloc(s->nb_temps); |
1049 |
memset(dead_temps, 1, s->nb_temps);
|
1050 |
|
1051 |
args = gen_opparam_ptr; |
1052 |
op_index = nb_ops - 1;
|
1053 |
while (op_index >= 0) { |
1054 |
op = gen_opc_buf[op_index]; |
1055 |
def = &tcg_op_defs[op]; |
1056 |
switch(op) {
|
1057 |
case INDEX_op_call:
|
1058 |
{ |
1059 |
int call_flags;
|
1060 |
|
1061 |
nb_args = args[-1];
|
1062 |
args -= nb_args; |
1063 |
nb_iargs = args[0] & 0xffff; |
1064 |
nb_oargs = args[0] >> 16; |
1065 |
args++; |
1066 |
call_flags = args[nb_oargs + nb_iargs]; |
1067 |
|
1068 |
/* pure functions can be removed if their result is not
|
1069 |
used */
|
1070 |
if (call_flags & TCG_CALL_PURE) {
|
1071 |
for(i = 0; i < nb_oargs; i++) { |
1072 |
arg = args[i]; |
1073 |
if (!dead_temps[arg])
|
1074 |
goto do_not_remove_call;
|
1075 |
} |
1076 |
tcg_set_nop(s, gen_opc_buf + op_index, |
1077 |
args - 1, nb_args);
|
1078 |
} else {
|
1079 |
do_not_remove_call:
|
1080 |
|
1081 |
/* output args are dead */
|
1082 |
for(i = 0; i < nb_oargs; i++) { |
1083 |
arg = args[i]; |
1084 |
dead_temps[arg] = 1;
|
1085 |
} |
1086 |
|
1087 |
/* globals are live (they may be used by the call) */
|
1088 |
memset(dead_temps, 0, s->nb_globals);
|
1089 |
|
1090 |
/* input args are live */
|
1091 |
dead_iargs = 0;
|
1092 |
for(i = 0; i < nb_iargs; i++) { |
1093 |
arg = args[i + nb_oargs]; |
1094 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1095 |
if (dead_temps[arg]) {
|
1096 |
dead_iargs |= (1 << i);
|
1097 |
} |
1098 |
dead_temps[arg] = 0;
|
1099 |
} |
1100 |
} |
1101 |
s->op_dead_iargs[op_index] = dead_iargs; |
1102 |
} |
1103 |
args--; |
1104 |
} |
1105 |
break;
|
1106 |
case INDEX_op_set_label:
|
1107 |
args--; |
1108 |
/* mark end of basic block */
|
1109 |
tcg_la_bb_end(s, dead_temps); |
1110 |
break;
|
1111 |
case INDEX_op_debug_insn_start:
|
1112 |
args -= def->nb_args; |
1113 |
break;
|
1114 |
case INDEX_op_nopn:
|
1115 |
nb_args = args[-1];
|
1116 |
args -= nb_args; |
1117 |
break;
|
1118 |
case INDEX_op_discard:
|
1119 |
args--; |
1120 |
/* mark the temporary as dead */
|
1121 |
dead_temps[args[0]] = 1; |
1122 |
break;
|
1123 |
case INDEX_op_macro_2:
|
1124 |
{ |
1125 |
int dead_args[2], macro_id; |
1126 |
int saved_op_index, saved_arg_index;
|
1127 |
int macro_op_index, macro_arg_index;
|
1128 |
int macro_end_op_index, macro_end_arg_index;
|
1129 |
int last_nb_temps;
|
1130 |
|
1131 |
nb_args = 3;
|
1132 |
args -= nb_args; |
1133 |
dead_args[0] = dead_temps[args[0]]; |
1134 |
dead_args[1] = dead_temps[args[1]]; |
1135 |
macro_id = args[2];
|
1136 |
|
1137 |
/* call the macro function which generate code
|
1138 |
depending on the live outputs */
|
1139 |
saved_op_index = op_index; |
1140 |
saved_arg_index = args - gen_opparam_buf; |
1141 |
|
1142 |
/* add a macro start instruction */
|
1143 |
*gen_opc_ptr++ = INDEX_op_macro_start; |
1144 |
*gen_opparam_ptr++ = saved_op_index; |
1145 |
*gen_opparam_ptr++ = saved_arg_index; |
1146 |
|
1147 |
macro_op_index = gen_opc_ptr - gen_opc_buf; |
1148 |
macro_arg_index = gen_opparam_ptr - gen_opparam_buf; |
1149 |
|
1150 |
last_nb_temps = s->nb_temps; |
1151 |
|
1152 |
s->macro_func(s, macro_id, dead_args); |
1153 |
|
1154 |
/* realloc temp info (XXX: make it faster) */
|
1155 |
if (s->nb_temps > last_nb_temps) {
|
1156 |
uint8_t *new_dead_temps; |
1157 |
|
1158 |
new_dead_temps = tcg_malloc(s->nb_temps); |
1159 |
memcpy(new_dead_temps, dead_temps, last_nb_temps); |
1160 |
memset(new_dead_temps + last_nb_temps, 1,
|
1161 |
s->nb_temps - last_nb_temps); |
1162 |
dead_temps = new_dead_temps; |
1163 |
} |
1164 |
|
1165 |
macro_end_op_index = gen_opc_ptr - gen_opc_buf; |
1166 |
macro_end_arg_index = gen_opparam_ptr - gen_opparam_buf; |
1167 |
|
1168 |
/* end of macro: add a goto to the next instruction */
|
1169 |
*gen_opc_ptr++ = INDEX_op_macro_end; |
1170 |
*gen_opparam_ptr++ = op_index + 1;
|
1171 |
*gen_opparam_ptr++ = saved_arg_index + nb_args; |
1172 |
|
1173 |
/* modify the macro operation to be a macro_goto */
|
1174 |
gen_opc_buf[op_index] = INDEX_op_macro_goto; |
1175 |
args[0] = macro_op_index;
|
1176 |
args[1] = macro_arg_index;
|
1177 |
args[2] = 0; /* dummy third arg to match the |
1178 |
macro parameters */
|
1179 |
|
1180 |
/* set the next instruction to the end of the macro */
|
1181 |
op_index = macro_end_op_index; |
1182 |
args = macro_end_arg_index + gen_opparam_buf; |
1183 |
} |
1184 |
break;
|
1185 |
case INDEX_op_macro_start:
|
1186 |
args -= 2;
|
1187 |
op_index = args[0];
|
1188 |
args = gen_opparam_buf + args[1];
|
1189 |
break;
|
1190 |
case INDEX_op_macro_goto:
|
1191 |
case INDEX_op_macro_end:
|
1192 |
tcg_abort(); /* should never happen in liveness analysis */
|
1193 |
case INDEX_op_end:
|
1194 |
break;
|
1195 |
/* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
|
1196 |
default:
|
1197 |
if (op > INDEX_op_end) {
|
1198 |
args -= def->nb_args; |
1199 |
nb_iargs = def->nb_iargs; |
1200 |
nb_oargs = def->nb_oargs; |
1201 |
|
1202 |
/* Test if the operation can be removed because all
|
1203 |
its outputs are dead. We assume that nb_oargs == 0
|
1204 |
implies side effects */
|
1205 |
if (!(def->flags & TCG_OPF_SIDE_EFFECTS) && nb_oargs != 0) { |
1206 |
for(i = 0; i < nb_oargs; i++) { |
1207 |
arg = args[i]; |
1208 |
if (!dead_temps[arg])
|
1209 |
goto do_not_remove;
|
1210 |
} |
1211 |
tcg_set_nop(s, gen_opc_buf + op_index, args, def->nb_args); |
1212 |
#ifdef CONFIG_PROFILER
|
1213 |
s->del_op_count++; |
1214 |
#endif
|
1215 |
} else {
|
1216 |
do_not_remove:
|
1217 |
|
1218 |
/* output args are dead */
|
1219 |
for(i = 0; i < nb_oargs; i++) { |
1220 |
arg = args[i]; |
1221 |
dead_temps[arg] = 1;
|
1222 |
} |
1223 |
|
1224 |
/* if end of basic block, update */
|
1225 |
if (def->flags & TCG_OPF_BB_END) {
|
1226 |
tcg_la_bb_end(s, dead_temps); |
1227 |
} else if (def->flags & TCG_OPF_CALL_CLOBBER) { |
1228 |
/* globals are live */
|
1229 |
memset(dead_temps, 0, s->nb_globals);
|
1230 |
} |
1231 |
|
1232 |
/* input args are live */
|
1233 |
dead_iargs = 0;
|
1234 |
for(i = 0; i < nb_iargs; i++) { |
1235 |
arg = args[i + nb_oargs]; |
1236 |
if (dead_temps[arg]) {
|
1237 |
dead_iargs |= (1 << i);
|
1238 |
} |
1239 |
dead_temps[arg] = 0;
|
1240 |
} |
1241 |
s->op_dead_iargs[op_index] = dead_iargs; |
1242 |
} |
1243 |
} else {
|
1244 |
/* legacy dyngen operations */
|
1245 |
args -= def->nb_args; |
1246 |
/* mark end of basic block */
|
1247 |
tcg_la_bb_end(s, dead_temps); |
1248 |
} |
1249 |
break;
|
1250 |
} |
1251 |
op_index--; |
1252 |
} |
1253 |
|
1254 |
if (args != gen_opparam_buf)
|
1255 |
tcg_abort(); |
1256 |
} |
1257 |
#else
|
1258 |
/* dummy liveness analysis */
|
1259 |
void tcg_liveness_analysis(TCGContext *s)
|
1260 |
{ |
1261 |
int nb_ops;
|
1262 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
1263 |
|
1264 |
s->op_dead_iargs = tcg_malloc(nb_ops * sizeof(uint16_t));
|
1265 |
memset(s->op_dead_iargs, 0, nb_ops * sizeof(uint16_t)); |
1266 |
} |
1267 |
#endif
|
1268 |
|
1269 |
#ifndef NDEBUG
|
1270 |
static void dump_regs(TCGContext *s) |
1271 |
{ |
1272 |
TCGTemp *ts; |
1273 |
int i;
|
1274 |
char buf[64]; |
1275 |
|
1276 |
for(i = 0; i < s->nb_temps; i++) { |
1277 |
ts = &s->temps[i]; |
1278 |
printf(" %10s: ", tcg_get_arg_str_idx(s, buf, sizeof(buf), i)); |
1279 |
switch(ts->val_type) {
|
1280 |
case TEMP_VAL_REG:
|
1281 |
printf("%s", tcg_target_reg_names[ts->reg]);
|
1282 |
break;
|
1283 |
case TEMP_VAL_MEM:
|
1284 |
printf("%d(%s)", (int)ts->mem_offset, tcg_target_reg_names[ts->mem_reg]); |
1285 |
break;
|
1286 |
case TEMP_VAL_CONST:
|
1287 |
printf("$0x%" TCG_PRIlx, ts->val);
|
1288 |
break;
|
1289 |
case TEMP_VAL_DEAD:
|
1290 |
printf("D");
|
1291 |
break;
|
1292 |
default:
|
1293 |
printf("???");
|
1294 |
break;
|
1295 |
} |
1296 |
printf("\n");
|
1297 |
} |
1298 |
|
1299 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
1300 |
if (s->reg_to_temp[i] >= 0) { |
1301 |
printf("%s: %s\n",
|
1302 |
tcg_target_reg_names[i], |
1303 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), s->reg_to_temp[i]));
|
1304 |
} |
1305 |
} |
1306 |
} |
1307 |
|
1308 |
static void check_regs(TCGContext *s) |
1309 |
{ |
1310 |
int reg, k;
|
1311 |
TCGTemp *ts; |
1312 |
char buf[64]; |
1313 |
|
1314 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1315 |
k = s->reg_to_temp[reg]; |
1316 |
if (k >= 0) { |
1317 |
ts = &s->temps[k]; |
1318 |
if (ts->val_type != TEMP_VAL_REG ||
|
1319 |
ts->reg != reg) { |
1320 |
printf("Inconsistency for register %s:\n",
|
1321 |
tcg_target_reg_names[reg]); |
1322 |
goto fail;
|
1323 |
} |
1324 |
} |
1325 |
} |
1326 |
for(k = 0; k < s->nb_temps; k++) { |
1327 |
ts = &s->temps[k]; |
1328 |
if (ts->val_type == TEMP_VAL_REG &&
|
1329 |
!ts->fixed_reg && |
1330 |
s->reg_to_temp[ts->reg] != k) { |
1331 |
printf("Inconsistency for temp %s:\n",
|
1332 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
|
1333 |
fail:
|
1334 |
printf("reg state:\n");
|
1335 |
dump_regs(s); |
1336 |
tcg_abort(); |
1337 |
} |
1338 |
} |
1339 |
} |
1340 |
#endif
|
1341 |
|
1342 |
static void temp_allocate_frame(TCGContext *s, int temp) |
1343 |
{ |
1344 |
TCGTemp *ts; |
1345 |
ts = &s->temps[temp]; |
1346 |
s->current_frame_offset = (s->current_frame_offset + sizeof(tcg_target_long) - 1) & ~(sizeof(tcg_target_long) - 1); |
1347 |
if (s->current_frame_offset + sizeof(tcg_target_long) > s->frame_end) |
1348 |
tcg_abort(); |
1349 |
ts->mem_offset = s->current_frame_offset; |
1350 |
ts->mem_reg = s->frame_reg; |
1351 |
ts->mem_allocated = 1;
|
1352 |
s->current_frame_offset += sizeof(tcg_target_long);
|
1353 |
} |
1354 |
|
1355 |
/* free register 'reg' by spilling the corresponding temporary if necessary */
|
1356 |
static void tcg_reg_free(TCGContext *s, int reg) |
1357 |
{ |
1358 |
TCGTemp *ts; |
1359 |
int temp;
|
1360 |
|
1361 |
temp = s->reg_to_temp[reg]; |
1362 |
if (temp != -1) { |
1363 |
ts = &s->temps[temp]; |
1364 |
assert(ts->val_type == TEMP_VAL_REG); |
1365 |
if (!ts->mem_coherent) {
|
1366 |
if (!ts->mem_allocated)
|
1367 |
temp_allocate_frame(s, temp); |
1368 |
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1369 |
} |
1370 |
ts->val_type = TEMP_VAL_MEM; |
1371 |
s->reg_to_temp[reg] = -1;
|
1372 |
} |
1373 |
} |
1374 |
|
1375 |
/* Allocate a register belonging to reg1 & ~reg2 */
|
1376 |
static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2) |
1377 |
{ |
1378 |
int i, reg;
|
1379 |
TCGRegSet reg_ct; |
1380 |
|
1381 |
tcg_regset_andnot(reg_ct, reg1, reg2); |
1382 |
|
1383 |
/* first try free registers */
|
1384 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1385 |
reg = tcg_target_reg_alloc_order[i]; |
1386 |
if (tcg_regset_test_reg(reg_ct, reg) && s->reg_to_temp[reg] == -1) |
1387 |
return reg;
|
1388 |
} |
1389 |
|
1390 |
/* XXX: do better spill choice */
|
1391 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1392 |
reg = tcg_target_reg_alloc_order[i]; |
1393 |
if (tcg_regset_test_reg(reg_ct, reg)) {
|
1394 |
tcg_reg_free(s, reg); |
1395 |
return reg;
|
1396 |
} |
1397 |
} |
1398 |
|
1399 |
tcg_abort(); |
1400 |
} |
1401 |
|
1402 |
/* save a temporary to memory. 'allocated_regs' is used in case a
|
1403 |
temporary registers needs to be allocated to store a constant. */
|
1404 |
static void temp_save(TCGContext *s, int temp, TCGRegSet allocated_regs) |
1405 |
{ |
1406 |
TCGTemp *ts; |
1407 |
int reg;
|
1408 |
|
1409 |
ts = &s->temps[temp]; |
1410 |
if (!ts->fixed_reg) {
|
1411 |
switch(ts->val_type) {
|
1412 |
case TEMP_VAL_REG:
|
1413 |
tcg_reg_free(s, ts->reg); |
1414 |
break;
|
1415 |
case TEMP_VAL_DEAD:
|
1416 |
ts->val_type = TEMP_VAL_MEM; |
1417 |
break;
|
1418 |
case TEMP_VAL_CONST:
|
1419 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1420 |
allocated_regs); |
1421 |
if (!ts->mem_allocated)
|
1422 |
temp_allocate_frame(s, temp); |
1423 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1424 |
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1425 |
ts->val_type = TEMP_VAL_MEM; |
1426 |
break;
|
1427 |
case TEMP_VAL_MEM:
|
1428 |
break;
|
1429 |
default:
|
1430 |
tcg_abort(); |
1431 |
} |
1432 |
} |
1433 |
} |
1434 |
|
1435 |
/* save globals to their cannonical location and assume they can be
|
1436 |
modified be the following code. 'allocated_regs' is used in case a
|
1437 |
temporary registers needs to be allocated to store a constant. */
|
1438 |
static void save_globals(TCGContext *s, TCGRegSet allocated_regs) |
1439 |
{ |
1440 |
int i;
|
1441 |
|
1442 |
for(i = 0; i < s->nb_globals; i++) { |
1443 |
temp_save(s, i, allocated_regs); |
1444 |
} |
1445 |
} |
1446 |
|
1447 |
/* at the end of a basic block, we assume all temporaries are dead and
|
1448 |
all globals are stored at their canonical location. */
|
1449 |
static void tcg_reg_alloc_bb_end(TCGContext *s, TCGRegSet allocated_regs) |
1450 |
{ |
1451 |
TCGTemp *ts; |
1452 |
int i;
|
1453 |
|
1454 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
1455 |
ts = &s->temps[i]; |
1456 |
if (ts->temp_local) {
|
1457 |
temp_save(s, i, allocated_regs); |
1458 |
} else {
|
1459 |
if (ts->val_type == TEMP_VAL_REG) {
|
1460 |
s->reg_to_temp[ts->reg] = -1;
|
1461 |
} |
1462 |
ts->val_type = TEMP_VAL_DEAD; |
1463 |
} |
1464 |
} |
1465 |
|
1466 |
save_globals(s, allocated_regs); |
1467 |
} |
1468 |
|
1469 |
#define IS_DEAD_IARG(n) ((dead_iargs >> (n)) & 1) |
1470 |
|
1471 |
static void tcg_reg_alloc_movi(TCGContext *s, const TCGArg *args) |
1472 |
{ |
1473 |
TCGTemp *ots; |
1474 |
tcg_target_ulong val; |
1475 |
|
1476 |
ots = &s->temps[args[0]];
|
1477 |
val = args[1];
|
1478 |
|
1479 |
if (ots->fixed_reg) {
|
1480 |
/* for fixed registers, we do not do any constant
|
1481 |
propagation */
|
1482 |
tcg_out_movi(s, ots->type, ots->reg, val); |
1483 |
} else {
|
1484 |
/* The movi is not explicitely generated here */
|
1485 |
if (ots->val_type == TEMP_VAL_REG)
|
1486 |
s->reg_to_temp[ots->reg] = -1;
|
1487 |
ots->val_type = TEMP_VAL_CONST; |
1488 |
ots->val = val; |
1489 |
} |
1490 |
} |
1491 |
|
1492 |
static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def, |
1493 |
const TCGArg *args,
|
1494 |
unsigned int dead_iargs) |
1495 |
{ |
1496 |
TCGTemp *ts, *ots; |
1497 |
int reg;
|
1498 |
const TCGArgConstraint *arg_ct;
|
1499 |
|
1500 |
ots = &s->temps[args[0]];
|
1501 |
ts = &s->temps[args[1]];
|
1502 |
arg_ct = &def->args_ct[0];
|
1503 |
|
1504 |
/* XXX: always mark arg dead if IS_DEAD_IARG(0) */
|
1505 |
if (ts->val_type == TEMP_VAL_REG) {
|
1506 |
if (IS_DEAD_IARG(0) && !ts->fixed_reg && !ots->fixed_reg) { |
1507 |
/* the mov can be suppressed */
|
1508 |
if (ots->val_type == TEMP_VAL_REG)
|
1509 |
s->reg_to_temp[ots->reg] = -1;
|
1510 |
reg = ts->reg; |
1511 |
s->reg_to_temp[reg] = -1;
|
1512 |
ts->val_type = TEMP_VAL_DEAD; |
1513 |
} else {
|
1514 |
if (ots->val_type == TEMP_VAL_REG) {
|
1515 |
reg = ots->reg; |
1516 |
} else {
|
1517 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1518 |
} |
1519 |
if (ts->reg != reg) {
|
1520 |
tcg_out_mov(s, reg, ts->reg); |
1521 |
} |
1522 |
} |
1523 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1524 |
if (ots->val_type == TEMP_VAL_REG) {
|
1525 |
reg = ots->reg; |
1526 |
} else {
|
1527 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1528 |
} |
1529 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1530 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1531 |
if (ots->fixed_reg) {
|
1532 |
reg = ots->reg; |
1533 |
tcg_out_movi(s, ots->type, reg, ts->val); |
1534 |
} else {
|
1535 |
/* propagate constant */
|
1536 |
if (ots->val_type == TEMP_VAL_REG)
|
1537 |
s->reg_to_temp[ots->reg] = -1;
|
1538 |
ots->val_type = TEMP_VAL_CONST; |
1539 |
ots->val = ts->val; |
1540 |
return;
|
1541 |
} |
1542 |
} else {
|
1543 |
tcg_abort(); |
1544 |
} |
1545 |
s->reg_to_temp[reg] = args[0];
|
1546 |
ots->reg = reg; |
1547 |
ots->val_type = TEMP_VAL_REG; |
1548 |
ots->mem_coherent = 0;
|
1549 |
} |
1550 |
|
1551 |
static void tcg_reg_alloc_op(TCGContext *s, |
1552 |
const TCGOpDef *def, int opc, |
1553 |
const TCGArg *args,
|
1554 |
unsigned int dead_iargs) |
1555 |
{ |
1556 |
TCGRegSet allocated_regs; |
1557 |
int i, k, nb_iargs, nb_oargs, reg;
|
1558 |
TCGArg arg; |
1559 |
const TCGArgConstraint *arg_ct;
|
1560 |
TCGTemp *ts; |
1561 |
TCGArg new_args[TCG_MAX_OP_ARGS]; |
1562 |
int const_args[TCG_MAX_OP_ARGS];
|
1563 |
|
1564 |
nb_oargs = def->nb_oargs; |
1565 |
nb_iargs = def->nb_iargs; |
1566 |
|
1567 |
/* copy constants */
|
1568 |
memcpy(new_args + nb_oargs + nb_iargs, |
1569 |
args + nb_oargs + nb_iargs, |
1570 |
sizeof(TCGArg) * def->nb_cargs);
|
1571 |
|
1572 |
/* satisfy input constraints */
|
1573 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1574 |
for(k = 0; k < nb_iargs; k++) { |
1575 |
i = def->sorted_args[nb_oargs + k]; |
1576 |
arg = args[i]; |
1577 |
arg_ct = &def->args_ct[i]; |
1578 |
ts = &s->temps[arg]; |
1579 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1580 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1581 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1582 |
ts->val_type = TEMP_VAL_REG; |
1583 |
ts->reg = reg; |
1584 |
ts->mem_coherent = 1;
|
1585 |
s->reg_to_temp[reg] = arg; |
1586 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1587 |
if (tcg_target_const_match(ts->val, arg_ct)) {
|
1588 |
/* constant is OK for instruction */
|
1589 |
const_args[i] = 1;
|
1590 |
new_args[i] = ts->val; |
1591 |
goto iarg_end;
|
1592 |
} else {
|
1593 |
/* need to move to a register */
|
1594 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1595 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1596 |
ts->val_type = TEMP_VAL_REG; |
1597 |
ts->reg = reg; |
1598 |
ts->mem_coherent = 0;
|
1599 |
s->reg_to_temp[reg] = arg; |
1600 |
} |
1601 |
} |
1602 |
assert(ts->val_type == TEMP_VAL_REG); |
1603 |
if (arg_ct->ct & TCG_CT_IALIAS) {
|
1604 |
if (ts->fixed_reg) {
|
1605 |
/* if fixed register, we must allocate a new register
|
1606 |
if the alias is not the same register */
|
1607 |
if (arg != args[arg_ct->alias_index])
|
1608 |
goto allocate_in_reg;
|
1609 |
} else {
|
1610 |
/* if the input is aliased to an output and if it is
|
1611 |
not dead after the instruction, we must allocate
|
1612 |
a new register and move it */
|
1613 |
if (!IS_DEAD_IARG(i - nb_oargs))
|
1614 |
goto allocate_in_reg;
|
1615 |
} |
1616 |
} |
1617 |
reg = ts->reg; |
1618 |
if (tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1619 |
/* nothing to do : the constraint is satisfied */
|
1620 |
} else {
|
1621 |
allocate_in_reg:
|
1622 |
/* allocate a new register matching the constraint
|
1623 |
and move the temporary register into it */
|
1624 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1625 |
tcg_out_mov(s, reg, ts->reg); |
1626 |
} |
1627 |
new_args[i] = reg; |
1628 |
const_args[i] = 0;
|
1629 |
tcg_regset_set_reg(allocated_regs, reg); |
1630 |
iarg_end: ;
|
1631 |
} |
1632 |
|
1633 |
if (def->flags & TCG_OPF_BB_END) {
|
1634 |
tcg_reg_alloc_bb_end(s, allocated_regs); |
1635 |
} else {
|
1636 |
/* mark dead temporaries and free the associated registers */
|
1637 |
for(i = 0; i < nb_iargs; i++) { |
1638 |
arg = args[nb_oargs + i]; |
1639 |
if (IS_DEAD_IARG(i)) {
|
1640 |
ts = &s->temps[arg]; |
1641 |
if (!ts->fixed_reg) {
|
1642 |
if (ts->val_type == TEMP_VAL_REG)
|
1643 |
s->reg_to_temp[ts->reg] = -1;
|
1644 |
ts->val_type = TEMP_VAL_DEAD; |
1645 |
} |
1646 |
} |
1647 |
} |
1648 |
|
1649 |
if (def->flags & TCG_OPF_CALL_CLOBBER) {
|
1650 |
/* XXX: permit generic clobber register list ? */
|
1651 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1652 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1653 |
tcg_reg_free(s, reg); |
1654 |
} |
1655 |
} |
1656 |
/* XXX: for load/store we could do that only for the slow path
|
1657 |
(i.e. when a memory callback is called) */
|
1658 |
|
1659 |
/* store globals and free associated registers (we assume the insn
|
1660 |
can modify any global. */
|
1661 |
save_globals(s, allocated_regs); |
1662 |
} |
1663 |
|
1664 |
/* satisfy the output constraints */
|
1665 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1666 |
for(k = 0; k < nb_oargs; k++) { |
1667 |
i = def->sorted_args[k]; |
1668 |
arg = args[i]; |
1669 |
arg_ct = &def->args_ct[i]; |
1670 |
ts = &s->temps[arg]; |
1671 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
1672 |
reg = new_args[arg_ct->alias_index]; |
1673 |
} else {
|
1674 |
/* if fixed register, we try to use it */
|
1675 |
reg = ts->reg; |
1676 |
if (ts->fixed_reg &&
|
1677 |
tcg_regset_test_reg(arg_ct->u.regs, reg)) { |
1678 |
goto oarg_end;
|
1679 |
} |
1680 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1681 |
} |
1682 |
tcg_regset_set_reg(allocated_regs, reg); |
1683 |
/* if a fixed register is used, then a move will be done afterwards */
|
1684 |
if (!ts->fixed_reg) {
|
1685 |
if (ts->val_type == TEMP_VAL_REG)
|
1686 |
s->reg_to_temp[ts->reg] = -1;
|
1687 |
ts->val_type = TEMP_VAL_REG; |
1688 |
ts->reg = reg; |
1689 |
/* temp value is modified, so the value kept in memory is
|
1690 |
potentially not the same */
|
1691 |
ts->mem_coherent = 0;
|
1692 |
s->reg_to_temp[reg] = arg; |
1693 |
} |
1694 |
oarg_end:
|
1695 |
new_args[i] = reg; |
1696 |
} |
1697 |
} |
1698 |
|
1699 |
/* emit instruction */
|
1700 |
tcg_out_op(s, opc, new_args, const_args); |
1701 |
|
1702 |
/* move the outputs in the correct register if needed */
|
1703 |
for(i = 0; i < nb_oargs; i++) { |
1704 |
ts = &s->temps[args[i]]; |
1705 |
reg = new_args[i]; |
1706 |
if (ts->fixed_reg && ts->reg != reg) {
|
1707 |
tcg_out_mov(s, ts->reg, reg); |
1708 |
} |
1709 |
} |
1710 |
} |
1711 |
|
1712 |
#ifdef TCG_TARGET_STACK_GROWSUP
|
1713 |
#define STACK_DIR(x) (-(x))
|
1714 |
#else
|
1715 |
#define STACK_DIR(x) (x)
|
1716 |
#endif
|
1717 |
|
1718 |
static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def, |
1719 |
int opc, const TCGArg *args, |
1720 |
unsigned int dead_iargs) |
1721 |
{ |
1722 |
int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params;
|
1723 |
TCGArg arg, func_arg; |
1724 |
TCGTemp *ts; |
1725 |
tcg_target_long stack_offset, call_stack_size, func_addr; |
1726 |
int const_func_arg, allocate_args;
|
1727 |
TCGRegSet allocated_regs; |
1728 |
const TCGArgConstraint *arg_ct;
|
1729 |
|
1730 |
arg = *args++; |
1731 |
|
1732 |
nb_oargs = arg >> 16;
|
1733 |
nb_iargs = arg & 0xffff;
|
1734 |
nb_params = nb_iargs - 1;
|
1735 |
|
1736 |
flags = args[nb_oargs + nb_iargs]; |
1737 |
|
1738 |
nb_regs = tcg_target_get_call_iarg_regs_count(flags); |
1739 |
if (nb_regs > nb_params)
|
1740 |
nb_regs = nb_params; |
1741 |
|
1742 |
/* assign stack slots first */
|
1743 |
/* XXX: preallocate call stack */
|
1744 |
call_stack_size = (nb_params - nb_regs) * sizeof(tcg_target_long);
|
1745 |
call_stack_size = (call_stack_size + TCG_TARGET_STACK_ALIGN - 1) &
|
1746 |
~(TCG_TARGET_STACK_ALIGN - 1);
|
1747 |
allocate_args = (call_stack_size > TCG_STATIC_CALL_ARGS_SIZE); |
1748 |
if (allocate_args) {
|
1749 |
tcg_out_addi(s, TCG_REG_CALL_STACK, -STACK_DIR(call_stack_size)); |
1750 |
} |
1751 |
|
1752 |
stack_offset = TCG_TARGET_CALL_STACK_OFFSET; |
1753 |
for(i = nb_regs; i < nb_params; i++) {
|
1754 |
arg = args[nb_oargs + i]; |
1755 |
#ifdef TCG_TARGET_STACK_GROWSUP
|
1756 |
stack_offset -= sizeof(tcg_target_long);
|
1757 |
#endif
|
1758 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1759 |
ts = &s->temps[arg]; |
1760 |
if (ts->val_type == TEMP_VAL_REG) {
|
1761 |
tcg_out_st(s, ts->type, ts->reg, TCG_REG_CALL_STACK, stack_offset); |
1762 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1763 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1764 |
s->reserved_regs); |
1765 |
/* XXX: not correct if reading values from the stack */
|
1766 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1767 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1768 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1769 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1770 |
s->reserved_regs); |
1771 |
/* XXX: sign extend may be needed on some targets */
|
1772 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1773 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1774 |
} else {
|
1775 |
tcg_abort(); |
1776 |
} |
1777 |
} |
1778 |
#ifndef TCG_TARGET_STACK_GROWSUP
|
1779 |
stack_offset += sizeof(tcg_target_long);
|
1780 |
#endif
|
1781 |
} |
1782 |
|
1783 |
/* assign input registers */
|
1784 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1785 |
for(i = 0; i < nb_regs; i++) { |
1786 |
arg = args[nb_oargs + i]; |
1787 |
if (arg != TCG_CALL_DUMMY_ARG) {
|
1788 |
ts = &s->temps[arg]; |
1789 |
reg = tcg_target_call_iarg_regs[i]; |
1790 |
tcg_reg_free(s, reg); |
1791 |
if (ts->val_type == TEMP_VAL_REG) {
|
1792 |
if (ts->reg != reg) {
|
1793 |
tcg_out_mov(s, reg, ts->reg); |
1794 |
} |
1795 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1796 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1797 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1798 |
/* XXX: sign extend ? */
|
1799 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1800 |
} else {
|
1801 |
tcg_abort(); |
1802 |
} |
1803 |
tcg_regset_set_reg(allocated_regs, reg); |
1804 |
} |
1805 |
} |
1806 |
|
1807 |
/* assign function address */
|
1808 |
func_arg = args[nb_oargs + nb_iargs - 1];
|
1809 |
arg_ct = &def->args_ct[0];
|
1810 |
ts = &s->temps[func_arg]; |
1811 |
func_addr = ts->val; |
1812 |
const_func_arg = 0;
|
1813 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1814 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1815 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1816 |
func_arg = reg; |
1817 |
tcg_regset_set_reg(allocated_regs, reg); |
1818 |
} else if (ts->val_type == TEMP_VAL_REG) { |
1819 |
reg = ts->reg; |
1820 |
if (!tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1821 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1822 |
tcg_out_mov(s, reg, ts->reg); |
1823 |
} |
1824 |
func_arg = reg; |
1825 |
tcg_regset_set_reg(allocated_regs, reg); |
1826 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1827 |
if (tcg_target_const_match(func_addr, arg_ct)) {
|
1828 |
const_func_arg = 1;
|
1829 |
func_arg = func_addr; |
1830 |
} else {
|
1831 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1832 |
tcg_out_movi(s, ts->type, reg, func_addr); |
1833 |
func_arg = reg; |
1834 |
tcg_regset_set_reg(allocated_regs, reg); |
1835 |
} |
1836 |
} else {
|
1837 |
tcg_abort(); |
1838 |
} |
1839 |
|
1840 |
|
1841 |
/* mark dead temporaries and free the associated registers */
|
1842 |
for(i = 0; i < nb_iargs; i++) { |
1843 |
arg = args[nb_oargs + i]; |
1844 |
if (IS_DEAD_IARG(i)) {
|
1845 |
ts = &s->temps[arg]; |
1846 |
if (!ts->fixed_reg) {
|
1847 |
if (ts->val_type == TEMP_VAL_REG)
|
1848 |
s->reg_to_temp[ts->reg] = -1;
|
1849 |
ts->val_type = TEMP_VAL_DEAD; |
1850 |
} |
1851 |
} |
1852 |
} |
1853 |
|
1854 |
/* clobber call registers */
|
1855 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1856 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1857 |
tcg_reg_free(s, reg); |
1858 |
} |
1859 |
} |
1860 |
|
1861 |
/* store globals and free associated registers (we assume the call
|
1862 |
can modify any global. */
|
1863 |
save_globals(s, allocated_regs); |
1864 |
|
1865 |
tcg_out_op(s, opc, &func_arg, &const_func_arg); |
1866 |
|
1867 |
if (allocate_args) {
|
1868 |
tcg_out_addi(s, TCG_REG_CALL_STACK, STACK_DIR(call_stack_size)); |
1869 |
} |
1870 |
|
1871 |
/* assign output registers and emit moves if needed */
|
1872 |
for(i = 0; i < nb_oargs; i++) { |
1873 |
arg = args[i]; |
1874 |
ts = &s->temps[arg]; |
1875 |
reg = tcg_target_call_oarg_regs[i]; |
1876 |
assert(s->reg_to_temp[reg] == -1);
|
1877 |
if (ts->fixed_reg) {
|
1878 |
if (ts->reg != reg) {
|
1879 |
tcg_out_mov(s, ts->reg, reg); |
1880 |
} |
1881 |
} else {
|
1882 |
if (ts->val_type == TEMP_VAL_REG)
|
1883 |
s->reg_to_temp[ts->reg] = -1;
|
1884 |
ts->val_type = TEMP_VAL_REG; |
1885 |
ts->reg = reg; |
1886 |
ts->mem_coherent = 0;
|
1887 |
s->reg_to_temp[reg] = arg; |
1888 |
} |
1889 |
} |
1890 |
|
1891 |
return nb_iargs + nb_oargs + def->nb_cargs + 1; |
1892 |
} |
1893 |
|
1894 |
#ifdef CONFIG_PROFILER
|
1895 |
|
1896 |
static int64_t dyngen_table_op_count[NB_OPS];
|
1897 |
|
1898 |
void dump_op_count(void) |
1899 |
{ |
1900 |
int i;
|
1901 |
FILE *f; |
1902 |
f = fopen("/tmp/op1.log", "w"); |
1903 |
for(i = 0; i < INDEX_op_end; i++) { |
1904 |
fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, dyngen_table_op_count[i]); |
1905 |
} |
1906 |
fclose(f); |
1907 |
f = fopen("/tmp/op2.log", "w"); |
1908 |
for(i = INDEX_op_end; i < NB_OPS; i++) {
|
1909 |
fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, dyngen_table_op_count[i]); |
1910 |
} |
1911 |
fclose(f); |
1912 |
} |
1913 |
#endif
|
1914 |
|
1915 |
|
1916 |
static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, |
1917 |
long search_pc)
|
1918 |
{ |
1919 |
int opc, op_index, macro_op_index;
|
1920 |
const TCGOpDef *def;
|
1921 |
unsigned int dead_iargs; |
1922 |
const TCGArg *args;
|
1923 |
|
1924 |
#ifdef DEBUG_DISAS
|
1925 |
if (unlikely(loglevel & CPU_LOG_TB_OP)) {
|
1926 |
fprintf(logfile, "OP:\n");
|
1927 |
tcg_dump_ops(s, logfile); |
1928 |
fprintf(logfile, "\n");
|
1929 |
} |
1930 |
#endif
|
1931 |
|
1932 |
#ifdef CONFIG_PROFILER
|
1933 |
s->la_time -= profile_getclock(); |
1934 |
#endif
|
1935 |
tcg_liveness_analysis(s); |
1936 |
#ifdef CONFIG_PROFILER
|
1937 |
s->la_time += profile_getclock(); |
1938 |
#endif
|
1939 |
|
1940 |
#ifdef DEBUG_DISAS
|
1941 |
if (unlikely(loglevel & CPU_LOG_TB_OP_OPT)) {
|
1942 |
fprintf(logfile, "OP after la:\n");
|
1943 |
tcg_dump_ops(s, logfile); |
1944 |
fprintf(logfile, "\n");
|
1945 |
} |
1946 |
#endif
|
1947 |
|
1948 |
tcg_reg_alloc_start(s); |
1949 |
|
1950 |
s->code_buf = gen_code_buf; |
1951 |
s->code_ptr = gen_code_buf; |
1952 |
|
1953 |
macro_op_index = -1;
|
1954 |
args = gen_opparam_buf; |
1955 |
op_index = 0;
|
1956 |
|
1957 |
for(;;) {
|
1958 |
opc = gen_opc_buf[op_index]; |
1959 |
#ifdef CONFIG_PROFILER
|
1960 |
dyngen_table_op_count[opc]++; |
1961 |
#endif
|
1962 |
def = &tcg_op_defs[opc]; |
1963 |
#if 0
|
1964 |
printf("%s: %d %d %d\n", def->name,
|
1965 |
def->nb_oargs, def->nb_iargs, def->nb_cargs);
|
1966 |
// dump_regs(s);
|
1967 |
#endif
|
1968 |
switch(opc) {
|
1969 |
case INDEX_op_mov_i32:
|
1970 |
#if TCG_TARGET_REG_BITS == 64 |
1971 |
case INDEX_op_mov_i64:
|
1972 |
#endif
|
1973 |
dead_iargs = s->op_dead_iargs[op_index]; |
1974 |
tcg_reg_alloc_mov(s, def, args, dead_iargs); |
1975 |
break;
|
1976 |
case INDEX_op_movi_i32:
|
1977 |
#if TCG_TARGET_REG_BITS == 64 |
1978 |
case INDEX_op_movi_i64:
|
1979 |
#endif
|
1980 |
tcg_reg_alloc_movi(s, args); |
1981 |
break;
|
1982 |
case INDEX_op_debug_insn_start:
|
1983 |
/* debug instruction */
|
1984 |
break;
|
1985 |
case INDEX_op_nop:
|
1986 |
case INDEX_op_nop1:
|
1987 |
case INDEX_op_nop2:
|
1988 |
case INDEX_op_nop3:
|
1989 |
break;
|
1990 |
case INDEX_op_nopn:
|
1991 |
args += args[0];
|
1992 |
goto next;
|
1993 |
case INDEX_op_discard:
|
1994 |
{ |
1995 |
TCGTemp *ts; |
1996 |
ts = &s->temps[args[0]];
|
1997 |
/* mark the temporary as dead */
|
1998 |
if (!ts->fixed_reg) {
|
1999 |
if (ts->val_type == TEMP_VAL_REG)
|
2000 |
s->reg_to_temp[ts->reg] = -1;
|
2001 |
ts->val_type = TEMP_VAL_DEAD; |
2002 |
} |
2003 |
} |
2004 |
break;
|
2005 |
case INDEX_op_macro_goto:
|
2006 |
macro_op_index = op_index; /* only used for exceptions */
|
2007 |
op_index = args[0] - 1; |
2008 |
args = gen_opparam_buf + args[1];
|
2009 |
goto next;
|
2010 |
case INDEX_op_macro_end:
|
2011 |
macro_op_index = -1; /* only used for exceptions */ |
2012 |
op_index = args[0] - 1; |
2013 |
args = gen_opparam_buf + args[1];
|
2014 |
goto next;
|
2015 |
case INDEX_op_macro_start:
|
2016 |
/* must never happen here */
|
2017 |
tcg_abort(); |
2018 |
case INDEX_op_set_label:
|
2019 |
tcg_reg_alloc_bb_end(s, s->reserved_regs); |
2020 |
tcg_out_label(s, args[0], (long)s->code_ptr); |
2021 |
break;
|
2022 |
case INDEX_op_call:
|
2023 |
dead_iargs = s->op_dead_iargs[op_index]; |
2024 |
args += tcg_reg_alloc_call(s, def, opc, args, dead_iargs); |
2025 |
goto next;
|
2026 |
case INDEX_op_end:
|
2027 |
goto the_end;
|
2028 |
|
2029 |
#ifdef CONFIG_DYNGEN_OP
|
2030 |
case 0 ... INDEX_op_end - 1: |
2031 |
/* legacy dyngen ops */
|
2032 |
#ifdef CONFIG_PROFILER
|
2033 |
s->old_op_count++; |
2034 |
#endif
|
2035 |
tcg_reg_alloc_bb_end(s, s->reserved_regs); |
2036 |
if (search_pc >= 0) { |
2037 |
s->code_ptr += def->copy_size; |
2038 |
args += def->nb_args; |
2039 |
} else {
|
2040 |
args = dyngen_op(s, opc, args); |
2041 |
} |
2042 |
goto next;
|
2043 |
#endif
|
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 |
if (macro_op_index >= 0) |
2056 |
return macro_op_index;
|
2057 |
else
|
2058 |
return op_index;
|
2059 |
} |
2060 |
op_index++; |
2061 |
#ifndef NDEBUG
|
2062 |
check_regs(s); |
2063 |
#endif
|
2064 |
} |
2065 |
the_end:
|
2066 |
return -1; |
2067 |
} |
2068 |
|
2069 |
int dyngen_code(TCGContext *s, uint8_t *gen_code_buf)
|
2070 |
{ |
2071 |
#ifdef CONFIG_PROFILER
|
2072 |
{ |
2073 |
int n;
|
2074 |
n = (gen_opc_ptr - gen_opc_buf); |
2075 |
s->op_count += n; |
2076 |
if (n > s->op_count_max)
|
2077 |
s->op_count_max = n; |
2078 |
|
2079 |
s->temp_count += s->nb_temps; |
2080 |
if (s->nb_temps > s->temp_count_max)
|
2081 |
s->temp_count_max = s->nb_temps; |
2082 |
} |
2083 |
#endif
|
2084 |
|
2085 |
tcg_gen_code_common(s, gen_code_buf, -1);
|
2086 |
|
2087 |
/* flush instruction cache */
|
2088 |
flush_icache_range((unsigned long)gen_code_buf, |
2089 |
(unsigned long)s->code_ptr); |
2090 |
return s->code_ptr - gen_code_buf;
|
2091 |
} |
2092 |
|
2093 |
/* Return the index of the micro operation such as the pc after is <
|
2094 |
offset bytes from the start of the TB. The contents of gen_code_buf must
|
2095 |
not be changed, though writing the same values is ok.
|
2096 |
Return -1 if not found. */
|
2097 |
int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset) |
2098 |
{ |
2099 |
return tcg_gen_code_common(s, gen_code_buf, offset);
|
2100 |
} |
2101 |
|
2102 |
#ifdef CONFIG_PROFILER
|
2103 |
void tcg_dump_info(FILE *f,
|
2104 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
2105 |
{ |
2106 |
TCGContext *s = &tcg_ctx; |
2107 |
int64_t tot; |
2108 |
|
2109 |
tot = s->interm_time + s->code_time; |
2110 |
cpu_fprintf(f, "JIT cycles %" PRId64 " (%0.3f s at 2.4 GHz)\n", |
2111 |
tot, tot / 2.4e9); |
2112 |
cpu_fprintf(f, "translated TBs %" PRId64 " (aborted=%" PRId64 " %0.1f%%)\n", |
2113 |
s->tb_count, |
2114 |
s->tb_count1 - s->tb_count, |
2115 |
s->tb_count1 ? (double)(s->tb_count1 - s->tb_count) / s->tb_count1 * 100.0 : 0); |
2116 |
cpu_fprintf(f, "avg ops/TB %0.1f max=%d\n",
|
2117 |
s->tb_count ? (double)s->op_count / s->tb_count : 0, s->op_count_max); |
2118 |
cpu_fprintf(f, "old ops/total ops %0.1f%%\n",
|
2119 |
s->op_count ? (double)s->old_op_count / s->op_count * 100.0 : 0); |
2120 |
cpu_fprintf(f, "deleted ops/TB %0.2f\n",
|
2121 |
s->tb_count ? |
2122 |
(double)s->del_op_count / s->tb_count : 0); |
2123 |
cpu_fprintf(f, "avg temps/TB %0.2f max=%d\n",
|
2124 |
s->tb_count ? |
2125 |
(double)s->temp_count / s->tb_count : 0, |
2126 |
s->temp_count_max); |
2127 |
|
2128 |
cpu_fprintf(f, "cycles/op %0.1f\n",
|
2129 |
s->op_count ? (double)tot / s->op_count : 0); |
2130 |
cpu_fprintf(f, "cycles/in byte %0.1f\n",
|
2131 |
s->code_in_len ? (double)tot / s->code_in_len : 0); |
2132 |
cpu_fprintf(f, "cycles/out byte %0.1f\n",
|
2133 |
s->code_out_len ? (double)tot / s->code_out_len : 0); |
2134 |
if (tot == 0) |
2135 |
tot = 1;
|
2136 |
cpu_fprintf(f, " gen_interm time %0.1f%%\n",
|
2137 |
(double)s->interm_time / tot * 100.0); |
2138 |
cpu_fprintf(f, " gen_code time %0.1f%%\n",
|
2139 |
(double)s->code_time / tot * 100.0); |
2140 |
cpu_fprintf(f, "liveness/code time %0.1f%%\n",
|
2141 |
(double)s->la_time / (s->code_time ? s->code_time : 1) * 100.0); |
2142 |
cpu_fprintf(f, "cpu_restore count %" PRId64 "\n", |
2143 |
s->restore_count); |
2144 |
cpu_fprintf(f, " avg cycles %0.1f\n",
|
2145 |
s->restore_count ? (double)s->restore_time / s->restore_count : 0); |
2146 |
{ |
2147 |
extern void dump_op_count(void); |
2148 |
dump_op_count(); |
2149 |
} |
2150 |
} |
2151 |
#else
|
2152 |
void tcg_dump_info(FILE *f,
|
2153 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
2154 |
{ |
2155 |
cpu_fprintf(f, "[TCG profiler not compiled]\n");
|
2156 |
} |
2157 |
#endif
|