root / tcg / tcg.c @ b03cce8e
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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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tcg_pool_reset(s); |
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s->nb_temps = s->nb_globals; |
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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->val_type = TEMP_VAL_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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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 |
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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 + 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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ts->val_type = TEMP_VAL_MEM; |
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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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ts->val_type = TEMP_VAL_MEM; |
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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->val_type = TEMP_VAL_MEM; |
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ts->name = name; |
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s->nb_globals++; |
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} |
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return MAKE_TCGV(idx);
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} |
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TCGv tcg_temp_new(TCGType type) |
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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_temps; |
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#if TCG_TARGET_REG_BITS == 32 |
382 |
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]; |
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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->val_type = TEMP_VAL_DEAD; |
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ts->mem_allocated = 0;
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ts->name = NULL;
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ts++; |
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ts->base_type = TCG_TYPE_I32; |
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ts->type = TCG_TYPE_I32; |
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ts->val_type = TEMP_VAL_DEAD; |
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ts->fixed_reg = 0;
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ts->mem_allocated = 0;
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ts->name = NULL;
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s->nb_temps += 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_temps + 1);
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ts = &s->temps[s->nb_temps]; |
404 |
ts->base_type = type; |
405 |
ts->type = type; |
406 |
ts->fixed_reg = 0;
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ts->val_type = TEMP_VAL_DEAD; |
408 |
ts->mem_allocated = 0;
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ts->name = NULL;
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s->nb_temps++; |
411 |
} |
412 |
return MAKE_TCGV(idx);
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} |
414 |
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TCGv tcg_const_i32(int32_t val) |
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{ |
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TCGContext *s = &tcg_ctx; |
418 |
TCGTemp *ts; |
419 |
int idx;
|
420 |
|
421 |
idx = s->nb_temps; |
422 |
tcg_temp_alloc(s, idx + 1);
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ts = &s->temps[idx]; |
424 |
ts->base_type = ts->type = TCG_TYPE_I32; |
425 |
ts->val_type = TEMP_VAL_CONST; |
426 |
ts->name = NULL;
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ts->val = val; |
428 |
s->nb_temps++; |
429 |
return MAKE_TCGV(idx);
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} |
431 |
|
432 |
TCGv tcg_const_i64(int64_t val) |
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{ |
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TCGContext *s = &tcg_ctx; |
435 |
TCGTemp *ts; |
436 |
int idx;
|
437 |
|
438 |
idx = s->nb_temps; |
439 |
#if TCG_TARGET_REG_BITS == 32 |
440 |
tcg_temp_alloc(s, idx + 2);
|
441 |
ts = &s->temps[idx]; |
442 |
ts->base_type = TCG_TYPE_I64; |
443 |
ts->type = TCG_TYPE_I32; |
444 |
ts->val_type = TEMP_VAL_CONST; |
445 |
ts->name = NULL;
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446 |
ts->val = val; |
447 |
ts++; |
448 |
ts->base_type = TCG_TYPE_I32; |
449 |
ts->type = TCG_TYPE_I32; |
450 |
ts->val_type = TEMP_VAL_CONST; |
451 |
ts->name = NULL;
|
452 |
ts->val = val >> 32;
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453 |
s->nb_temps += 2;
|
454 |
#else
|
455 |
tcg_temp_alloc(s, idx + 1);
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456 |
ts = &s->temps[idx]; |
457 |
ts->base_type = ts->type = TCG_TYPE_I64; |
458 |
ts->val_type = TEMP_VAL_CONST; |
459 |
ts->name = NULL;
|
460 |
ts->val = val; |
461 |
s->nb_temps++; |
462 |
#endif
|
463 |
return MAKE_TCGV(idx);
|
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} |
465 |
|
466 |
void tcg_register_helper(void *func, const char *name) |
467 |
{ |
468 |
TCGContext *s = &tcg_ctx; |
469 |
int n;
|
470 |
if ((s->nb_helpers + 1) > s->allocated_helpers) { |
471 |
n = s->allocated_helpers; |
472 |
if (n == 0) { |
473 |
n = 4;
|
474 |
} else {
|
475 |
n *= 2;
|
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} |
477 |
s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo));
|
478 |
s->allocated_helpers = n; |
479 |
} |
480 |
s->helpers[s->nb_helpers].func = func; |
481 |
s->helpers[s->nb_helpers].name = name; |
482 |
s->nb_helpers++; |
483 |
} |
484 |
|
485 |
const char *tcg_helper_get_name(TCGContext *s, void *func) |
486 |
{ |
487 |
int i;
|
488 |
|
489 |
for(i = 0; i < s->nb_helpers; i++) { |
490 |
if (s->helpers[i].func == func)
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491 |
return s->helpers[i].name;
|
492 |
} |
493 |
return NULL; |
494 |
} |
495 |
|
496 |
static inline TCGType tcg_get_base_type(TCGContext *s, TCGv arg) |
497 |
{ |
498 |
return s->temps[GET_TCGV(arg)].base_type;
|
499 |
} |
500 |
|
501 |
static void tcg_gen_call_internal(TCGContext *s, TCGv func, |
502 |
unsigned int flags, |
503 |
unsigned int nb_rets, const TCGv *rets, |
504 |
unsigned int nb_params, const TCGv *params) |
505 |
{ |
506 |
int i;
|
507 |
*gen_opc_ptr++ = INDEX_op_call; |
508 |
*gen_opparam_ptr++ = (nb_rets << 16) | (nb_params + 1); |
509 |
for(i = 0; i < nb_rets; i++) { |
510 |
*gen_opparam_ptr++ = GET_TCGV(rets[i]); |
511 |
} |
512 |
for(i = 0; i < nb_params; i++) { |
513 |
*gen_opparam_ptr++ = GET_TCGV(params[i]); |
514 |
} |
515 |
*gen_opparam_ptr++ = GET_TCGV(func); |
516 |
|
517 |
*gen_opparam_ptr++ = flags; |
518 |
/* total parameters, needed to go backward in the instruction stream */
|
519 |
*gen_opparam_ptr++ = 1 + nb_rets + nb_params + 3; |
520 |
} |
521 |
|
522 |
|
523 |
#if TCG_TARGET_REG_BITS < 64 |
524 |
/* Note: we convert the 64 bit args to 32 bit */
|
525 |
void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags, |
526 |
unsigned int nb_rets, const TCGv *rets, |
527 |
unsigned int nb_params, const TCGv *args1) |
528 |
{ |
529 |
TCGv ret, *args2, rets_2[2], arg;
|
530 |
int j, i, call_type;
|
531 |
|
532 |
if (nb_rets == 1) { |
533 |
ret = rets[0];
|
534 |
if (tcg_get_base_type(s, ret) == TCG_TYPE_I64) {
|
535 |
nb_rets = 2;
|
536 |
rets_2[0] = ret;
|
537 |
rets_2[1] = TCGV_HIGH(ret);
|
538 |
rets = rets_2; |
539 |
} |
540 |
} |
541 |
args2 = alloca((nb_params * 2) * sizeof(TCGv)); |
542 |
j = 0;
|
543 |
call_type = (flags & TCG_CALL_TYPE_MASK); |
544 |
for(i = 0; i < nb_params; i++) { |
545 |
arg = args1[i]; |
546 |
if (tcg_get_base_type(s, arg) == TCG_TYPE_I64) {
|
547 |
#ifdef TCG_TARGET_I386
|
548 |
/* REGPARM case: if the third parameter is 64 bit, it is
|
549 |
allocated on the stack */
|
550 |
if (j == 2 && call_type == TCG_CALL_TYPE_REGPARM) { |
551 |
call_type = TCG_CALL_TYPE_REGPARM_2; |
552 |
flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type; |
553 |
} |
554 |
args2[j++] = arg; |
555 |
args2[j++] = TCGV_HIGH(arg); |
556 |
#else
|
557 |
#ifdef TCG_TARGET_WORDS_BIGENDIAN
|
558 |
args2[j++] = TCGV_HIGH(arg); |
559 |
args2[j++] = arg; |
560 |
#else
|
561 |
args2[j++] = arg; |
562 |
args2[j++] = TCGV_HIGH(arg); |
563 |
#endif
|
564 |
#endif
|
565 |
} else {
|
566 |
args2[j++] = arg; |
567 |
} |
568 |
} |
569 |
tcg_gen_call_internal(s, func, flags, |
570 |
nb_rets, rets, j, args2); |
571 |
} |
572 |
#else
|
573 |
void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags, |
574 |
unsigned int nb_rets, const TCGv *rets, |
575 |
unsigned int nb_params, const TCGv *args1) |
576 |
{ |
577 |
tcg_gen_call_internal(s, func, flags, |
578 |
nb_rets, rets, nb_params, args1); |
579 |
} |
580 |
#endif
|
581 |
|
582 |
#if TCG_TARGET_REG_BITS == 32 |
583 |
void tcg_gen_shifti_i64(TCGv ret, TCGv arg1,
|
584 |
int c, int right, int arith) |
585 |
{ |
586 |
if (c == 0) |
587 |
return;
|
588 |
if (c >= 32) { |
589 |
c -= 32;
|
590 |
if (right) {
|
591 |
if (arith) {
|
592 |
tcg_gen_sari_i32(ret, TCGV_HIGH(arg1), c); |
593 |
tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
|
594 |
} else {
|
595 |
tcg_gen_shri_i32(ret, TCGV_HIGH(arg1), c); |
596 |
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
|
597 |
} |
598 |
} else {
|
599 |
tcg_gen_shli_i32(TCGV_HIGH(ret), arg1, c); |
600 |
tcg_gen_movi_i32(ret, 0);
|
601 |
} |
602 |
} else {
|
603 |
TCGv t0, t1; |
604 |
|
605 |
t0 = tcg_temp_new(TCG_TYPE_I32); |
606 |
t1 = tcg_temp_new(TCG_TYPE_I32); |
607 |
if (right) {
|
608 |
tcg_gen_shli_i32(t0, TCGV_HIGH(arg1), 32 - c);
|
609 |
if (arith)
|
610 |
tcg_gen_sari_i32(t1, TCGV_HIGH(arg1), c); |
611 |
else
|
612 |
tcg_gen_shri_i32(t1, TCGV_HIGH(arg1), c); |
613 |
tcg_gen_shri_i32(ret, arg1, c); |
614 |
tcg_gen_or_i32(ret, ret, t0); |
615 |
tcg_gen_mov_i32(TCGV_HIGH(ret), t1); |
616 |
} else {
|
617 |
tcg_gen_shri_i32(t0, arg1, 32 - c);
|
618 |
/* Note: ret can be the same as arg1, so we use t1 */
|
619 |
tcg_gen_shli_i32(t1, arg1, c); |
620 |
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c); |
621 |
tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t0); |
622 |
tcg_gen_mov_i32(ret, t1); |
623 |
} |
624 |
} |
625 |
} |
626 |
#endif
|
627 |
|
628 |
void tcg_reg_alloc_start(TCGContext *s)
|
629 |
{ |
630 |
int i;
|
631 |
TCGTemp *ts; |
632 |
for(i = 0; i < s->nb_globals; i++) { |
633 |
ts = &s->temps[i]; |
634 |
if (ts->fixed_reg) {
|
635 |
ts->val_type = TEMP_VAL_REG; |
636 |
} else {
|
637 |
ts->val_type = TEMP_VAL_MEM; |
638 |
} |
639 |
} |
640 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
641 |
s->reg_to_temp[i] = -1;
|
642 |
} |
643 |
} |
644 |
|
645 |
static char *tcg_get_arg_str_idx(TCGContext *s, char *buf, int buf_size, |
646 |
int idx)
|
647 |
{ |
648 |
TCGTemp *ts; |
649 |
|
650 |
ts = &s->temps[idx]; |
651 |
if (idx < s->nb_globals) {
|
652 |
pstrcpy(buf, buf_size, ts->name); |
653 |
} else {
|
654 |
if (ts->val_type == TEMP_VAL_CONST) {
|
655 |
snprintf(buf, buf_size, "$0x%" TCG_PRIlx , ts->val);
|
656 |
} else {
|
657 |
snprintf(buf, buf_size, "tmp%d", idx - s->nb_globals);
|
658 |
} |
659 |
} |
660 |
return buf;
|
661 |
} |
662 |
|
663 |
char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGv arg) |
664 |
{ |
665 |
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV(arg));
|
666 |
} |
667 |
|
668 |
void tcg_dump_ops(TCGContext *s, FILE *outfile)
|
669 |
{ |
670 |
const uint16_t *opc_ptr;
|
671 |
const TCGArg *args;
|
672 |
TCGArg arg; |
673 |
int c, i, k, nb_oargs, nb_iargs, nb_cargs;
|
674 |
const TCGOpDef *def;
|
675 |
char buf[128]; |
676 |
|
677 |
opc_ptr = gen_opc_buf; |
678 |
args = gen_opparam_buf; |
679 |
while (opc_ptr < gen_opc_ptr) {
|
680 |
c = *opc_ptr++; |
681 |
def = &tcg_op_defs[c]; |
682 |
fprintf(outfile, " %s ", def->name);
|
683 |
if (c == INDEX_op_call) {
|
684 |
TCGArg arg; |
685 |
/* variable number of arguments */
|
686 |
arg = *args++; |
687 |
nb_oargs = arg >> 16;
|
688 |
nb_iargs = arg & 0xffff;
|
689 |
nb_cargs = def->nb_cargs; |
690 |
|
691 |
/* function name */
|
692 |
/* XXX: dump helper name for call */
|
693 |
fprintf(outfile, "%s",
|
694 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + nb_iargs - 1])); |
695 |
/* flags */
|
696 |
fprintf(outfile, ",$0x%" TCG_PRIlx,
|
697 |
args[nb_oargs + nb_iargs]); |
698 |
/* nb out args */
|
699 |
fprintf(outfile, ",$%d", nb_oargs);
|
700 |
for(i = 0; i < nb_oargs; i++) { |
701 |
fprintf(outfile, ",");
|
702 |
fprintf(outfile, "%s",
|
703 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[i]));
|
704 |
} |
705 |
for(i = 0; i < (nb_iargs - 1); i++) { |
706 |
fprintf(outfile, ",");
|
707 |
fprintf(outfile, "%s",
|
708 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + i]));
|
709 |
} |
710 |
} else {
|
711 |
if (c == INDEX_op_nopn) {
|
712 |
/* variable number of arguments */
|
713 |
nb_cargs = *args; |
714 |
nb_oargs = 0;
|
715 |
nb_iargs = 0;
|
716 |
} else {
|
717 |
nb_oargs = def->nb_oargs; |
718 |
nb_iargs = def->nb_iargs; |
719 |
nb_cargs = def->nb_cargs; |
720 |
} |
721 |
|
722 |
k = 0;
|
723 |
for(i = 0; i < nb_oargs; i++) { |
724 |
if (k != 0) |
725 |
fprintf(outfile, ",");
|
726 |
fprintf(outfile, "%s",
|
727 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
728 |
} |
729 |
for(i = 0; i < nb_iargs; i++) { |
730 |
if (k != 0) |
731 |
fprintf(outfile, ",");
|
732 |
fprintf(outfile, "%s",
|
733 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
734 |
} |
735 |
for(i = 0; i < nb_cargs; i++) { |
736 |
if (k != 0) |
737 |
fprintf(outfile, ",");
|
738 |
arg = args[k++]; |
739 |
fprintf(outfile, "$0x%" TCG_PRIlx, arg);
|
740 |
} |
741 |
} |
742 |
fprintf(outfile, "\n");
|
743 |
args += nb_iargs + nb_oargs + nb_cargs; |
744 |
} |
745 |
} |
746 |
|
747 |
/* we give more priority to constraints with less registers */
|
748 |
static int get_constraint_priority(const TCGOpDef *def, int k) |
749 |
{ |
750 |
const TCGArgConstraint *arg_ct;
|
751 |
|
752 |
int i, n;
|
753 |
arg_ct = &def->args_ct[k]; |
754 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
755 |
/* an alias is equivalent to a single register */
|
756 |
n = 1;
|
757 |
} else {
|
758 |
if (!(arg_ct->ct & TCG_CT_REG))
|
759 |
return 0; |
760 |
n = 0;
|
761 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
762 |
if (tcg_regset_test_reg(arg_ct->u.regs, i))
|
763 |
n++; |
764 |
} |
765 |
} |
766 |
return TCG_TARGET_NB_REGS - n + 1; |
767 |
} |
768 |
|
769 |
/* sort from highest priority to lowest */
|
770 |
static void sort_constraints(TCGOpDef *def, int start, int n) |
771 |
{ |
772 |
int i, j, p1, p2, tmp;
|
773 |
|
774 |
for(i = 0; i < n; i++) |
775 |
def->sorted_args[start + i] = start + i; |
776 |
if (n <= 1) |
777 |
return;
|
778 |
for(i = 0; i < n - 1; i++) { |
779 |
for(j = i + 1; j < n; j++) { |
780 |
p1 = get_constraint_priority(def, def->sorted_args[start + i]); |
781 |
p2 = get_constraint_priority(def, def->sorted_args[start + j]); |
782 |
if (p1 < p2) {
|
783 |
tmp = def->sorted_args[start + i]; |
784 |
def->sorted_args[start + i] = def->sorted_args[start + j]; |
785 |
def->sorted_args[start + j] = tmp; |
786 |
} |
787 |
} |
788 |
} |
789 |
} |
790 |
|
791 |
void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs) |
792 |
{ |
793 |
int op;
|
794 |
TCGOpDef *def; |
795 |
const char *ct_str; |
796 |
int i, nb_args;
|
797 |
|
798 |
for(;;) {
|
799 |
if (tdefs->op < 0) |
800 |
break;
|
801 |
op = tdefs->op; |
802 |
assert(op >= 0 && op < NB_OPS);
|
803 |
def = &tcg_op_defs[op]; |
804 |
nb_args = def->nb_iargs + def->nb_oargs; |
805 |
for(i = 0; i < nb_args; i++) { |
806 |
ct_str = tdefs->args_ct_str[i]; |
807 |
tcg_regset_clear(def->args_ct[i].u.regs); |
808 |
def->args_ct[i].ct = 0;
|
809 |
if (ct_str[0] >= '0' && ct_str[0] <= '9') { |
810 |
int oarg;
|
811 |
oarg = ct_str[0] - '0'; |
812 |
assert(oarg < def->nb_oargs); |
813 |
assert(def->args_ct[oarg].ct & TCG_CT_REG); |
814 |
/* TCG_CT_ALIAS is for the output arguments. The input
|
815 |
argument is tagged with TCG_CT_IALIAS. */
|
816 |
def->args_ct[i] = def->args_ct[oarg]; |
817 |
def->args_ct[oarg].ct = TCG_CT_ALIAS; |
818 |
def->args_ct[oarg].alias_index = i; |
819 |
def->args_ct[i].ct |= TCG_CT_IALIAS; |
820 |
def->args_ct[i].alias_index = oarg; |
821 |
} else {
|
822 |
for(;;) {
|
823 |
if (*ct_str == '\0') |
824 |
break;
|
825 |
switch(*ct_str) {
|
826 |
case 'i': |
827 |
def->args_ct[i].ct |= TCG_CT_CONST; |
828 |
ct_str++; |
829 |
break;
|
830 |
default:
|
831 |
if (target_parse_constraint(&def->args_ct[i], &ct_str) < 0) { |
832 |
fprintf(stderr, "Invalid constraint '%s' for arg %d of operation '%s'\n",
|
833 |
ct_str, i, def->name); |
834 |
exit(1);
|
835 |
} |
836 |
} |
837 |
} |
838 |
} |
839 |
} |
840 |
|
841 |
/* sort the constraints (XXX: this is just an heuristic) */
|
842 |
sort_constraints(def, 0, def->nb_oargs);
|
843 |
sort_constraints(def, def->nb_oargs, def->nb_iargs); |
844 |
|
845 |
#if 0
|
846 |
{
|
847 |
int i;
|
848 |
|
849 |
printf("%s: sorted=", def->name);
|
850 |
for(i = 0; i < def->nb_oargs + def->nb_iargs; i++)
|
851 |
printf(" %d", def->sorted_args[i]);
|
852 |
printf("\n");
|
853 |
}
|
854 |
#endif
|
855 |
tdefs++; |
856 |
} |
857 |
|
858 |
} |
859 |
|
860 |
#ifdef USE_LIVENESS_ANALYSIS
|
861 |
|
862 |
/* set a nop for an operation using 'nb_args' */
|
863 |
static inline void tcg_set_nop(TCGContext *s, uint16_t *opc_ptr, |
864 |
TCGArg *args, int nb_args)
|
865 |
{ |
866 |
if (nb_args == 0) { |
867 |
*opc_ptr = INDEX_op_nop; |
868 |
} else {
|
869 |
*opc_ptr = INDEX_op_nopn; |
870 |
args[0] = nb_args;
|
871 |
args[nb_args - 1] = nb_args;
|
872 |
} |
873 |
} |
874 |
|
875 |
/* liveness analysis: end of basic block: globals are live, temps are dead */
|
876 |
static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps) |
877 |
{ |
878 |
memset(dead_temps, 0, s->nb_globals);
|
879 |
memset(dead_temps + s->nb_globals, 1, s->nb_temps - s->nb_globals);
|
880 |
} |
881 |
|
882 |
/* Liveness analysis : update the opc_dead_iargs array to tell if a
|
883 |
given input arguments is dead. Instructions updating dead
|
884 |
temporaries are removed. */
|
885 |
void tcg_liveness_analysis(TCGContext *s)
|
886 |
{ |
887 |
int i, op_index, op, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
|
888 |
TCGArg *args; |
889 |
const TCGOpDef *def;
|
890 |
uint8_t *dead_temps; |
891 |
unsigned int dead_iargs; |
892 |
|
893 |
gen_opc_ptr++; /* skip end */
|
894 |
|
895 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
896 |
|
897 |
/* XXX: make it really dynamic */
|
898 |
s->op_dead_iargs = tcg_malloc(OPC_BUF_SIZE * sizeof(uint16_t));
|
899 |
|
900 |
dead_temps = tcg_malloc(s->nb_temps); |
901 |
memset(dead_temps, 1, s->nb_temps);
|
902 |
|
903 |
args = gen_opparam_ptr; |
904 |
op_index = nb_ops - 1;
|
905 |
while (op_index >= 0) { |
906 |
op = gen_opc_buf[op_index]; |
907 |
def = &tcg_op_defs[op]; |
908 |
switch(op) {
|
909 |
case INDEX_op_call:
|
910 |
nb_args = args[-1];
|
911 |
args -= nb_args; |
912 |
nb_iargs = args[0] & 0xffff; |
913 |
nb_oargs = args[0] >> 16; |
914 |
args++; |
915 |
|
916 |
/* output args are dead */
|
917 |
for(i = 0; i < nb_oargs; i++) { |
918 |
arg = args[i]; |
919 |
dead_temps[arg] = 1;
|
920 |
} |
921 |
|
922 |
/* globals are live (they may be used by the call) */
|
923 |
memset(dead_temps, 0, s->nb_globals);
|
924 |
|
925 |
/* input args are live */
|
926 |
dead_iargs = 0;
|
927 |
for(i = 0; i < nb_iargs; i++) { |
928 |
arg = args[i + nb_oargs]; |
929 |
if (dead_temps[arg]) {
|
930 |
dead_iargs |= (1 << i);
|
931 |
} |
932 |
dead_temps[arg] = 0;
|
933 |
} |
934 |
s->op_dead_iargs[op_index] = dead_iargs; |
935 |
args--; |
936 |
break;
|
937 |
case INDEX_op_set_label:
|
938 |
args--; |
939 |
/* mark end of basic block */
|
940 |
tcg_la_bb_end(s, dead_temps); |
941 |
break;
|
942 |
case INDEX_op_nopn:
|
943 |
nb_args = args[-1];
|
944 |
args -= nb_args; |
945 |
break;
|
946 |
case INDEX_op_discard:
|
947 |
args--; |
948 |
/* mark the temporary as dead */
|
949 |
dead_temps[args[0]] = 1; |
950 |
break;
|
951 |
case INDEX_op_macro_2:
|
952 |
{ |
953 |
int dead_args[2], macro_id; |
954 |
int saved_op_index, saved_arg_index;
|
955 |
int macro_op_index, macro_arg_index;
|
956 |
int macro_end_op_index, macro_end_arg_index;
|
957 |
int last_nb_temps;
|
958 |
|
959 |
nb_args = 3;
|
960 |
args -= nb_args; |
961 |
dead_args[0] = dead_temps[args[0]]; |
962 |
dead_args[1] = dead_temps[args[1]]; |
963 |
macro_id = args[2];
|
964 |
|
965 |
/* call the macro function which generate code
|
966 |
depending on the live outputs */
|
967 |
saved_op_index = op_index; |
968 |
saved_arg_index = args - gen_opparam_buf; |
969 |
|
970 |
/* add a macro start instruction */
|
971 |
*gen_opc_ptr++ = INDEX_op_macro_start; |
972 |
*gen_opparam_ptr++ = saved_op_index; |
973 |
*gen_opparam_ptr++ = saved_arg_index; |
974 |
|
975 |
macro_op_index = gen_opc_ptr - gen_opc_buf; |
976 |
macro_arg_index = gen_opparam_ptr - gen_opparam_buf; |
977 |
|
978 |
last_nb_temps = s->nb_temps; |
979 |
|
980 |
s->macro_func(s, macro_id, dead_args); |
981 |
|
982 |
/* realloc temp info (XXX: make it faster) */
|
983 |
if (s->nb_temps > last_nb_temps) {
|
984 |
uint8_t *new_dead_temps; |
985 |
|
986 |
new_dead_temps = tcg_malloc(s->nb_temps); |
987 |
memcpy(new_dead_temps, dead_temps, last_nb_temps); |
988 |
memset(new_dead_temps + last_nb_temps, 1,
|
989 |
s->nb_temps - last_nb_temps); |
990 |
dead_temps = new_dead_temps; |
991 |
} |
992 |
|
993 |
macro_end_op_index = gen_opc_ptr - gen_opc_buf; |
994 |
macro_end_arg_index = gen_opparam_ptr - gen_opparam_buf; |
995 |
|
996 |
/* end of macro: add a goto to the next instruction */
|
997 |
*gen_opc_ptr++ = INDEX_op_macro_end; |
998 |
*gen_opparam_ptr++ = op_index + 1;
|
999 |
*gen_opparam_ptr++ = saved_arg_index + nb_args; |
1000 |
|
1001 |
/* modify the macro operation to be a macro_goto */
|
1002 |
gen_opc_buf[op_index] = INDEX_op_macro_goto; |
1003 |
args[0] = macro_op_index;
|
1004 |
args[1] = macro_arg_index;
|
1005 |
args[2] = 0; /* dummy third arg to match the |
1006 |
macro parameters */
|
1007 |
|
1008 |
/* set the next instruction to the end of the macro */
|
1009 |
op_index = macro_end_op_index; |
1010 |
args = macro_end_arg_index + gen_opparam_buf; |
1011 |
} |
1012 |
break;
|
1013 |
case INDEX_op_macro_start:
|
1014 |
args -= 2;
|
1015 |
op_index = args[0];
|
1016 |
args = gen_opparam_buf + args[1];
|
1017 |
break;
|
1018 |
case INDEX_op_macro_goto:
|
1019 |
case INDEX_op_macro_end:
|
1020 |
tcg_abort(); /* should never happen in liveness analysis */
|
1021 |
case INDEX_op_end:
|
1022 |
break;
|
1023 |
/* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
|
1024 |
default:
|
1025 |
if (op > INDEX_op_end) {
|
1026 |
args -= def->nb_args; |
1027 |
nb_iargs = def->nb_iargs; |
1028 |
nb_oargs = def->nb_oargs; |
1029 |
|
1030 |
/* Test if the operation can be removed because all
|
1031 |
its outputs are dead. We assume that nb_oargs == 0
|
1032 |
implies side effects */
|
1033 |
if (!(def->flags & TCG_OPF_SIDE_EFFECTS) && nb_oargs != 0) { |
1034 |
for(i = 0; i < nb_oargs; i++) { |
1035 |
arg = args[i]; |
1036 |
if (!dead_temps[arg])
|
1037 |
goto do_not_remove;
|
1038 |
} |
1039 |
tcg_set_nop(s, gen_opc_buf + op_index, args, def->nb_args); |
1040 |
#ifdef CONFIG_PROFILER
|
1041 |
{ |
1042 |
extern int64_t dyngen_tcg_del_op_count;
|
1043 |
dyngen_tcg_del_op_count++; |
1044 |
} |
1045 |
#endif
|
1046 |
} else {
|
1047 |
do_not_remove:
|
1048 |
|
1049 |
/* output args are dead */
|
1050 |
for(i = 0; i < nb_oargs; i++) { |
1051 |
arg = args[i]; |
1052 |
dead_temps[arg] = 1;
|
1053 |
} |
1054 |
|
1055 |
/* if end of basic block, update */
|
1056 |
if (def->flags & TCG_OPF_BB_END) {
|
1057 |
tcg_la_bb_end(s, dead_temps); |
1058 |
} else if (def->flags & TCG_OPF_CALL_CLOBBER) { |
1059 |
/* globals are live */
|
1060 |
memset(dead_temps, 0, s->nb_globals);
|
1061 |
} |
1062 |
|
1063 |
/* input args are live */
|
1064 |
dead_iargs = 0;
|
1065 |
for(i = 0; i < nb_iargs; i++) { |
1066 |
arg = args[i + nb_oargs]; |
1067 |
if (dead_temps[arg]) {
|
1068 |
dead_iargs |= (1 << i);
|
1069 |
} |
1070 |
dead_temps[arg] = 0;
|
1071 |
} |
1072 |
s->op_dead_iargs[op_index] = dead_iargs; |
1073 |
} |
1074 |
} else {
|
1075 |
/* legacy dyngen operations */
|
1076 |
args -= def->nb_args; |
1077 |
/* mark end of basic block */
|
1078 |
tcg_la_bb_end(s, dead_temps); |
1079 |
} |
1080 |
break;
|
1081 |
} |
1082 |
op_index--; |
1083 |
} |
1084 |
|
1085 |
if (args != gen_opparam_buf)
|
1086 |
tcg_abort(); |
1087 |
} |
1088 |
#else
|
1089 |
/* dummy liveness analysis */
|
1090 |
void tcg_liveness_analysis(TCGContext *s)
|
1091 |
{ |
1092 |
int nb_ops;
|
1093 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
1094 |
|
1095 |
s->op_dead_iargs = tcg_malloc(nb_ops * sizeof(uint16_t));
|
1096 |
memset(s->op_dead_iargs, 0, nb_ops * sizeof(uint16_t)); |
1097 |
} |
1098 |
#endif
|
1099 |
|
1100 |
#ifndef NDEBUG
|
1101 |
static void dump_regs(TCGContext *s) |
1102 |
{ |
1103 |
TCGTemp *ts; |
1104 |
int i;
|
1105 |
char buf[64]; |
1106 |
|
1107 |
for(i = 0; i < s->nb_temps; i++) { |
1108 |
ts = &s->temps[i]; |
1109 |
printf(" %10s: ", tcg_get_arg_str_idx(s, buf, sizeof(buf), i)); |
1110 |
switch(ts->val_type) {
|
1111 |
case TEMP_VAL_REG:
|
1112 |
printf("%s", tcg_target_reg_names[ts->reg]);
|
1113 |
break;
|
1114 |
case TEMP_VAL_MEM:
|
1115 |
printf("%d(%s)", (int)ts->mem_offset, tcg_target_reg_names[ts->mem_reg]); |
1116 |
break;
|
1117 |
case TEMP_VAL_CONST:
|
1118 |
printf("$0x%" TCG_PRIlx, ts->val);
|
1119 |
break;
|
1120 |
case TEMP_VAL_DEAD:
|
1121 |
printf("D");
|
1122 |
break;
|
1123 |
default:
|
1124 |
printf("???");
|
1125 |
break;
|
1126 |
} |
1127 |
printf("\n");
|
1128 |
} |
1129 |
|
1130 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
1131 |
if (s->reg_to_temp[i] >= 0) { |
1132 |
printf("%s: %s\n",
|
1133 |
tcg_target_reg_names[i], |
1134 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), s->reg_to_temp[i]));
|
1135 |
} |
1136 |
} |
1137 |
} |
1138 |
|
1139 |
static void check_regs(TCGContext *s) |
1140 |
{ |
1141 |
int reg, k;
|
1142 |
TCGTemp *ts; |
1143 |
char buf[64]; |
1144 |
|
1145 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1146 |
k = s->reg_to_temp[reg]; |
1147 |
if (k >= 0) { |
1148 |
ts = &s->temps[k]; |
1149 |
if (ts->val_type != TEMP_VAL_REG ||
|
1150 |
ts->reg != reg) { |
1151 |
printf("Inconsistency for register %s:\n",
|
1152 |
tcg_target_reg_names[reg]); |
1153 |
goto fail;
|
1154 |
} |
1155 |
} |
1156 |
} |
1157 |
for(k = 0; k < s->nb_temps; k++) { |
1158 |
ts = &s->temps[k]; |
1159 |
if (ts->val_type == TEMP_VAL_REG &&
|
1160 |
!ts->fixed_reg && |
1161 |
s->reg_to_temp[ts->reg] != k) { |
1162 |
printf("Inconsistency for temp %s:\n",
|
1163 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
|
1164 |
fail:
|
1165 |
printf("reg state:\n");
|
1166 |
dump_regs(s); |
1167 |
tcg_abort(); |
1168 |
} |
1169 |
if (ts->val_type == TEMP_VAL_CONST && k < s->nb_globals) {
|
1170 |
printf("constant forbidden in global %s\n",
|
1171 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
|
1172 |
goto fail;
|
1173 |
} |
1174 |
} |
1175 |
} |
1176 |
#endif
|
1177 |
|
1178 |
static void temp_allocate_frame(TCGContext *s, int temp) |
1179 |
{ |
1180 |
TCGTemp *ts; |
1181 |
ts = &s->temps[temp]; |
1182 |
s->current_frame_offset = (s->current_frame_offset + sizeof(tcg_target_long) - 1) & ~(sizeof(tcg_target_long) - 1); |
1183 |
if (s->current_frame_offset + sizeof(tcg_target_long) > s->frame_end) |
1184 |
tcg_abort(); |
1185 |
ts->mem_offset = s->current_frame_offset; |
1186 |
ts->mem_reg = s->frame_reg; |
1187 |
ts->mem_allocated = 1;
|
1188 |
s->current_frame_offset += sizeof(tcg_target_long);
|
1189 |
} |
1190 |
|
1191 |
/* free register 'reg' by spilling the corresponding temporary if necessary */
|
1192 |
static void tcg_reg_free(TCGContext *s, int reg) |
1193 |
{ |
1194 |
TCGTemp *ts; |
1195 |
int temp;
|
1196 |
|
1197 |
temp = s->reg_to_temp[reg]; |
1198 |
if (temp != -1) { |
1199 |
ts = &s->temps[temp]; |
1200 |
assert(ts->val_type == TEMP_VAL_REG); |
1201 |
if (!ts->mem_coherent) {
|
1202 |
if (!ts->mem_allocated)
|
1203 |
temp_allocate_frame(s, temp); |
1204 |
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1205 |
} |
1206 |
ts->val_type = TEMP_VAL_MEM; |
1207 |
s->reg_to_temp[reg] = -1;
|
1208 |
} |
1209 |
} |
1210 |
|
1211 |
/* Allocate a register belonging to reg1 & ~reg2 */
|
1212 |
static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2) |
1213 |
{ |
1214 |
int i, reg;
|
1215 |
TCGRegSet reg_ct; |
1216 |
|
1217 |
tcg_regset_andnot(reg_ct, reg1, reg2); |
1218 |
|
1219 |
/* first try free registers */
|
1220 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1221 |
reg = tcg_target_reg_alloc_order[i]; |
1222 |
if (tcg_regset_test_reg(reg_ct, reg) && s->reg_to_temp[reg] == -1) |
1223 |
return reg;
|
1224 |
} |
1225 |
|
1226 |
/* XXX: do better spill choice */
|
1227 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1228 |
reg = tcg_target_reg_alloc_order[i]; |
1229 |
if (tcg_regset_test_reg(reg_ct, reg)) {
|
1230 |
tcg_reg_free(s, reg); |
1231 |
return reg;
|
1232 |
} |
1233 |
} |
1234 |
|
1235 |
tcg_abort(); |
1236 |
} |
1237 |
|
1238 |
/* at the end of a basic block, we assume all temporaries are dead and
|
1239 |
all globals are stored at their canonical location */
|
1240 |
/* XXX: optimize by handling constants in another array ? */
|
1241 |
void tcg_reg_alloc_bb_end(TCGContext *s)
|
1242 |
{ |
1243 |
TCGTemp *ts; |
1244 |
int i;
|
1245 |
|
1246 |
for(i = 0; i < s->nb_globals; i++) { |
1247 |
ts = &s->temps[i]; |
1248 |
if (!ts->fixed_reg) {
|
1249 |
if (ts->val_type == TEMP_VAL_REG) {
|
1250 |
tcg_reg_free(s, ts->reg); |
1251 |
} |
1252 |
} |
1253 |
} |
1254 |
|
1255 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
1256 |
ts = &s->temps[i]; |
1257 |
if (ts->val_type != TEMP_VAL_CONST) {
|
1258 |
if (ts->val_type == TEMP_VAL_REG) {
|
1259 |
s->reg_to_temp[ts->reg] = -1;
|
1260 |
} |
1261 |
ts->val_type = TEMP_VAL_DEAD; |
1262 |
} |
1263 |
} |
1264 |
} |
1265 |
|
1266 |
#define IS_DEAD_IARG(n) ((dead_iargs >> (n)) & 1) |
1267 |
|
1268 |
static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def, |
1269 |
const TCGArg *args,
|
1270 |
unsigned int dead_iargs) |
1271 |
{ |
1272 |
TCGTemp *ts, *ots; |
1273 |
int reg;
|
1274 |
const TCGArgConstraint *arg_ct;
|
1275 |
|
1276 |
ots = &s->temps[args[0]];
|
1277 |
ts = &s->temps[args[1]];
|
1278 |
arg_ct = &def->args_ct[0];
|
1279 |
|
1280 |
if (ts->val_type == TEMP_VAL_REG) {
|
1281 |
if (IS_DEAD_IARG(0) && !ts->fixed_reg && !ots->fixed_reg) { |
1282 |
/* the mov can be suppressed */
|
1283 |
if (ots->val_type == TEMP_VAL_REG)
|
1284 |
s->reg_to_temp[ots->reg] = -1;
|
1285 |
reg = ts->reg; |
1286 |
s->reg_to_temp[reg] = -1;
|
1287 |
ts->val_type = TEMP_VAL_DEAD; |
1288 |
} else {
|
1289 |
if (ots->val_type == TEMP_VAL_REG) {
|
1290 |
reg = ots->reg; |
1291 |
} else {
|
1292 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1293 |
} |
1294 |
if (ts->reg != reg) {
|
1295 |
tcg_out_mov(s, reg, ts->reg); |
1296 |
} |
1297 |
} |
1298 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1299 |
if (ots->val_type == TEMP_VAL_REG) {
|
1300 |
reg = ots->reg; |
1301 |
} else {
|
1302 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1303 |
} |
1304 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1305 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1306 |
if (ots->val_type == TEMP_VAL_REG) {
|
1307 |
reg = ots->reg; |
1308 |
} else {
|
1309 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1310 |
} |
1311 |
tcg_out_movi(s, ots->type, reg, ts->val); |
1312 |
} else {
|
1313 |
tcg_abort(); |
1314 |
} |
1315 |
s->reg_to_temp[reg] = args[0];
|
1316 |
ots->reg = reg; |
1317 |
ots->val_type = TEMP_VAL_REG; |
1318 |
ots->mem_coherent = 0;
|
1319 |
} |
1320 |
|
1321 |
static void tcg_reg_alloc_op(TCGContext *s, |
1322 |
const TCGOpDef *def, int opc, |
1323 |
const TCGArg *args,
|
1324 |
unsigned int dead_iargs) |
1325 |
{ |
1326 |
TCGRegSet allocated_regs; |
1327 |
int i, k, nb_iargs, nb_oargs, reg;
|
1328 |
TCGArg arg; |
1329 |
const TCGArgConstraint *arg_ct;
|
1330 |
TCGTemp *ts; |
1331 |
TCGArg new_args[TCG_MAX_OP_ARGS]; |
1332 |
int const_args[TCG_MAX_OP_ARGS];
|
1333 |
|
1334 |
nb_oargs = def->nb_oargs; |
1335 |
nb_iargs = def->nb_iargs; |
1336 |
|
1337 |
/* copy constants */
|
1338 |
memcpy(new_args + nb_oargs + nb_iargs, |
1339 |
args + nb_oargs + nb_iargs, |
1340 |
sizeof(TCGArg) * def->nb_cargs);
|
1341 |
|
1342 |
/* satisfy input constraints */
|
1343 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1344 |
for(k = 0; k < nb_iargs; k++) { |
1345 |
i = def->sorted_args[nb_oargs + k]; |
1346 |
arg = args[i]; |
1347 |
arg_ct = &def->args_ct[i]; |
1348 |
ts = &s->temps[arg]; |
1349 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1350 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1351 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1352 |
ts->val_type = TEMP_VAL_REG; |
1353 |
ts->reg = reg; |
1354 |
ts->mem_coherent = 1;
|
1355 |
s->reg_to_temp[reg] = arg; |
1356 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1357 |
if (tcg_target_const_match(ts->val, arg_ct)) {
|
1358 |
/* constant is OK for instruction */
|
1359 |
const_args[i] = 1;
|
1360 |
new_args[i] = ts->val; |
1361 |
goto iarg_end;
|
1362 |
} else {
|
1363 |
/* need to move to a register*/
|
1364 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1365 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1366 |
goto iarg_end1;
|
1367 |
} |
1368 |
} |
1369 |
assert(ts->val_type == TEMP_VAL_REG); |
1370 |
if (arg_ct->ct & TCG_CT_IALIAS) {
|
1371 |
if (ts->fixed_reg) {
|
1372 |
/* if fixed register, we must allocate a new register
|
1373 |
if the alias is not the same register */
|
1374 |
if (arg != args[arg_ct->alias_index])
|
1375 |
goto allocate_in_reg;
|
1376 |
} else {
|
1377 |
/* if the input is aliased to an output and if it is
|
1378 |
not dead after the instruction, we must allocate
|
1379 |
a new register and move it */
|
1380 |
if (!IS_DEAD_IARG(i - nb_oargs))
|
1381 |
goto allocate_in_reg;
|
1382 |
} |
1383 |
} |
1384 |
reg = ts->reg; |
1385 |
if (tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1386 |
/* nothing to do : the constraint is satisfied */
|
1387 |
} else {
|
1388 |
allocate_in_reg:
|
1389 |
/* allocate a new register matching the constraint
|
1390 |
and move the temporary register into it */
|
1391 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1392 |
tcg_out_mov(s, reg, ts->reg); |
1393 |
} |
1394 |
iarg_end1:
|
1395 |
new_args[i] = reg; |
1396 |
const_args[i] = 0;
|
1397 |
tcg_regset_set_reg(allocated_regs, reg); |
1398 |
iarg_end: ;
|
1399 |
} |
1400 |
|
1401 |
/* mark dead temporaries and free the associated registers */
|
1402 |
for(i = 0; i < nb_iargs; i++) { |
1403 |
arg = args[nb_oargs + i]; |
1404 |
if (IS_DEAD_IARG(i)) {
|
1405 |
ts = &s->temps[arg]; |
1406 |
if (ts->val_type != TEMP_VAL_CONST && !ts->fixed_reg) {
|
1407 |
if (ts->val_type == TEMP_VAL_REG)
|
1408 |
s->reg_to_temp[ts->reg] = -1;
|
1409 |
ts->val_type = TEMP_VAL_DEAD; |
1410 |
} |
1411 |
} |
1412 |
} |
1413 |
|
1414 |
if (def->flags & TCG_OPF_CALL_CLOBBER) {
|
1415 |
/* XXX: permit generic clobber register list ? */
|
1416 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1417 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1418 |
tcg_reg_free(s, reg); |
1419 |
} |
1420 |
} |
1421 |
/* XXX: for load/store we could do that only for the slow path
|
1422 |
(i.e. when a memory callback is called) */
|
1423 |
|
1424 |
/* store globals and free associated registers (we assume the insn
|
1425 |
can modify any global. */
|
1426 |
for(i = 0; i < s->nb_globals; i++) { |
1427 |
ts = &s->temps[i]; |
1428 |
if (!ts->fixed_reg) {
|
1429 |
if (ts->val_type == TEMP_VAL_REG) {
|
1430 |
tcg_reg_free(s, ts->reg); |
1431 |
} |
1432 |
} |
1433 |
} |
1434 |
} |
1435 |
|
1436 |
/* satisfy the output constraints */
|
1437 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1438 |
for(k = 0; k < nb_oargs; k++) { |
1439 |
i = def->sorted_args[k]; |
1440 |
arg = args[i]; |
1441 |
arg_ct = &def->args_ct[i]; |
1442 |
ts = &s->temps[arg]; |
1443 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
1444 |
reg = new_args[arg_ct->alias_index]; |
1445 |
} else {
|
1446 |
/* if fixed register, we try to use it */
|
1447 |
reg = ts->reg; |
1448 |
if (ts->fixed_reg &&
|
1449 |
tcg_regset_test_reg(arg_ct->u.regs, reg)) { |
1450 |
goto oarg_end;
|
1451 |
} |
1452 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1453 |
} |
1454 |
tcg_regset_set_reg(allocated_regs, reg); |
1455 |
/* if a fixed register is used, then a move will be done afterwards */
|
1456 |
if (!ts->fixed_reg) {
|
1457 |
if (ts->val_type == TEMP_VAL_REG)
|
1458 |
s->reg_to_temp[ts->reg] = -1;
|
1459 |
ts->val_type = TEMP_VAL_REG; |
1460 |
ts->reg = reg; |
1461 |
/* temp value is modified, so the value kept in memory is
|
1462 |
potentially not the same */
|
1463 |
ts->mem_coherent = 0;
|
1464 |
s->reg_to_temp[reg] = arg; |
1465 |
} |
1466 |
oarg_end:
|
1467 |
new_args[i] = reg; |
1468 |
} |
1469 |
|
1470 |
if (def->flags & TCG_OPF_BB_END)
|
1471 |
tcg_reg_alloc_bb_end(s); |
1472 |
|
1473 |
/* emit instruction */
|
1474 |
tcg_out_op(s, opc, new_args, const_args); |
1475 |
|
1476 |
/* move the outputs in the correct register if needed */
|
1477 |
for(i = 0; i < nb_oargs; i++) { |
1478 |
ts = &s->temps[args[i]]; |
1479 |
reg = new_args[i]; |
1480 |
if (ts->fixed_reg && ts->reg != reg) {
|
1481 |
tcg_out_mov(s, ts->reg, reg); |
1482 |
} |
1483 |
} |
1484 |
} |
1485 |
|
1486 |
#ifdef TCG_TARGET_STACK_GROWSUP
|
1487 |
#define STACK_DIR(x) (-(x))
|
1488 |
#else
|
1489 |
#define STACK_DIR(x) (x)
|
1490 |
#endif
|
1491 |
|
1492 |
static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def, |
1493 |
int opc, const TCGArg *args, |
1494 |
unsigned int dead_iargs) |
1495 |
{ |
1496 |
int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params;
|
1497 |
TCGArg arg, func_arg; |
1498 |
TCGTemp *ts; |
1499 |
tcg_target_long stack_offset, call_stack_size, func_addr; |
1500 |
int const_func_arg, allocate_args;
|
1501 |
TCGRegSet allocated_regs; |
1502 |
const TCGArgConstraint *arg_ct;
|
1503 |
|
1504 |
arg = *args++; |
1505 |
|
1506 |
nb_oargs = arg >> 16;
|
1507 |
nb_iargs = arg & 0xffff;
|
1508 |
nb_params = nb_iargs - 1;
|
1509 |
|
1510 |
flags = args[nb_oargs + nb_iargs]; |
1511 |
|
1512 |
nb_regs = tcg_target_get_call_iarg_regs_count(flags); |
1513 |
if (nb_regs > nb_params)
|
1514 |
nb_regs = nb_params; |
1515 |
|
1516 |
/* assign stack slots first */
|
1517 |
/* XXX: preallocate call stack */
|
1518 |
call_stack_size = (nb_params - nb_regs) * sizeof(tcg_target_long);
|
1519 |
call_stack_size = (call_stack_size + TCG_TARGET_STACK_ALIGN - 1) &
|
1520 |
~(TCG_TARGET_STACK_ALIGN - 1);
|
1521 |
allocate_args = (call_stack_size > TCG_STATIC_CALL_ARGS_SIZE); |
1522 |
if (allocate_args) {
|
1523 |
tcg_out_addi(s, TCG_REG_CALL_STACK, -STACK_DIR(call_stack_size)); |
1524 |
} |
1525 |
/* XXX: on some architectures it does not start at zero */
|
1526 |
stack_offset = 0;
|
1527 |
for(i = nb_regs; i < nb_params; i++) {
|
1528 |
arg = args[nb_oargs + i]; |
1529 |
ts = &s->temps[arg]; |
1530 |
if (ts->val_type == TEMP_VAL_REG) {
|
1531 |
tcg_out_st(s, ts->type, ts->reg, TCG_REG_CALL_STACK, stack_offset); |
1532 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1533 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1534 |
s->reserved_regs); |
1535 |
/* XXX: not correct if reading values from the stack */
|
1536 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1537 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1538 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1539 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1540 |
s->reserved_regs); |
1541 |
/* XXX: sign extend may be needed on some targets */
|
1542 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1543 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1544 |
} else {
|
1545 |
tcg_abort(); |
1546 |
} |
1547 |
/* XXX: not necessarily in the same order */
|
1548 |
stack_offset += STACK_DIR(sizeof(tcg_target_long));
|
1549 |
} |
1550 |
|
1551 |
/* assign input registers */
|
1552 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1553 |
for(i = 0; i < nb_regs; i++) { |
1554 |
arg = args[nb_oargs + i]; |
1555 |
ts = &s->temps[arg]; |
1556 |
reg = tcg_target_call_iarg_regs[i]; |
1557 |
tcg_reg_free(s, reg); |
1558 |
if (ts->val_type == TEMP_VAL_REG) {
|
1559 |
if (ts->reg != reg) {
|
1560 |
tcg_out_mov(s, reg, ts->reg); |
1561 |
} |
1562 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1563 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1564 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1565 |
/* XXX: sign extend ? */
|
1566 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1567 |
} else {
|
1568 |
tcg_abort(); |
1569 |
} |
1570 |
tcg_regset_set_reg(allocated_regs, reg); |
1571 |
} |
1572 |
|
1573 |
/* assign function address */
|
1574 |
func_arg = args[nb_oargs + nb_iargs - 1];
|
1575 |
arg_ct = &def->args_ct[0];
|
1576 |
ts = &s->temps[func_arg]; |
1577 |
func_addr = ts->val; |
1578 |
const_func_arg = 0;
|
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 |
func_arg = reg; |
1583 |
} else if (ts->val_type == TEMP_VAL_REG) { |
1584 |
reg = ts->reg; |
1585 |
if (!tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1586 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1587 |
tcg_out_mov(s, reg, ts->reg); |
1588 |
} |
1589 |
func_arg = reg; |
1590 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1591 |
if (tcg_target_const_match(func_addr, arg_ct)) {
|
1592 |
const_func_arg = 1;
|
1593 |
func_arg = func_addr; |
1594 |
} else {
|
1595 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1596 |
tcg_out_movi(s, ts->type, reg, func_addr); |
1597 |
func_arg = reg; |
1598 |
} |
1599 |
} else {
|
1600 |
tcg_abort(); |
1601 |
} |
1602 |
|
1603 |
/* mark dead temporaries and free the associated registers */
|
1604 |
for(i = 0; i < nb_params; i++) { |
1605 |
arg = args[nb_oargs + i]; |
1606 |
if (IS_DEAD_IARG(i)) {
|
1607 |
ts = &s->temps[arg]; |
1608 |
if (ts->val_type != TEMP_VAL_CONST && !ts->fixed_reg) {
|
1609 |
if (ts->val_type == TEMP_VAL_REG)
|
1610 |
s->reg_to_temp[ts->reg] = -1;
|
1611 |
ts->val_type = TEMP_VAL_DEAD; |
1612 |
} |
1613 |
} |
1614 |
} |
1615 |
|
1616 |
/* clobber call registers */
|
1617 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1618 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1619 |
tcg_reg_free(s, reg); |
1620 |
} |
1621 |
} |
1622 |
|
1623 |
/* store globals and free associated registers (we assume the call
|
1624 |
can modify any global. */
|
1625 |
for(i = 0; i < s->nb_globals; i++) { |
1626 |
ts = &s->temps[i]; |
1627 |
if (!ts->fixed_reg) {
|
1628 |
if (ts->val_type == TEMP_VAL_REG) {
|
1629 |
tcg_reg_free(s, ts->reg); |
1630 |
} |
1631 |
} |
1632 |
} |
1633 |
|
1634 |
tcg_out_op(s, opc, &func_arg, &const_func_arg); |
1635 |
|
1636 |
if (allocate_args) {
|
1637 |
tcg_out_addi(s, TCG_REG_CALL_STACK, STACK_DIR(call_stack_size)); |
1638 |
} |
1639 |
|
1640 |
/* assign output registers and emit moves if needed */
|
1641 |
for(i = 0; i < nb_oargs; i++) { |
1642 |
arg = args[i]; |
1643 |
ts = &s->temps[arg]; |
1644 |
reg = tcg_target_call_oarg_regs[i]; |
1645 |
tcg_reg_free(s, reg); |
1646 |
if (ts->fixed_reg) {
|
1647 |
if (ts->reg != reg) {
|
1648 |
tcg_out_mov(s, ts->reg, reg); |
1649 |
} |
1650 |
} else {
|
1651 |
if (ts->val_type == TEMP_VAL_REG)
|
1652 |
s->reg_to_temp[ts->reg] = -1;
|
1653 |
ts->val_type = TEMP_VAL_REG; |
1654 |
ts->reg = reg; |
1655 |
ts->mem_coherent = 0;
|
1656 |
s->reg_to_temp[reg] = arg; |
1657 |
} |
1658 |
} |
1659 |
|
1660 |
return nb_iargs + nb_oargs + def->nb_cargs + 1; |
1661 |
} |
1662 |
|
1663 |
#ifdef CONFIG_PROFILER
|
1664 |
|
1665 |
static int64_t dyngen_table_op_count[NB_OPS];
|
1666 |
|
1667 |
void dump_op_count(void) |
1668 |
{ |
1669 |
int i;
|
1670 |
FILE *f; |
1671 |
f = fopen("/tmp/op1.log", "w"); |
1672 |
for(i = 0; i < INDEX_op_end; i++) { |
1673 |
fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, dyngen_table_op_count[i]); |
1674 |
} |
1675 |
fclose(f); |
1676 |
f = fopen("/tmp/op2.log", "w"); |
1677 |
for(i = INDEX_op_end; i < NB_OPS; i++) {
|
1678 |
fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, dyngen_table_op_count[i]); |
1679 |
} |
1680 |
fclose(f); |
1681 |
} |
1682 |
#endif
|
1683 |
|
1684 |
|
1685 |
static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, |
1686 |
long search_pc)
|
1687 |
{ |
1688 |
int opc, op_index, macro_op_index;
|
1689 |
const TCGOpDef *def;
|
1690 |
unsigned int dead_iargs; |
1691 |
const TCGArg *args;
|
1692 |
|
1693 |
#ifdef DEBUG_DISAS
|
1694 |
if (unlikely(loglevel & CPU_LOG_TB_OP)) {
|
1695 |
fprintf(logfile, "OP:\n");
|
1696 |
tcg_dump_ops(s, logfile); |
1697 |
fprintf(logfile, "\n");
|
1698 |
} |
1699 |
#endif
|
1700 |
|
1701 |
tcg_liveness_analysis(s); |
1702 |
|
1703 |
#ifdef DEBUG_DISAS
|
1704 |
if (unlikely(loglevel & CPU_LOG_TB_OP_OPT)) {
|
1705 |
fprintf(logfile, "OP after la:\n");
|
1706 |
tcg_dump_ops(s, logfile); |
1707 |
fprintf(logfile, "\n");
|
1708 |
} |
1709 |
#endif
|
1710 |
|
1711 |
tcg_reg_alloc_start(s); |
1712 |
|
1713 |
s->code_buf = gen_code_buf; |
1714 |
s->code_ptr = gen_code_buf; |
1715 |
|
1716 |
macro_op_index = -1;
|
1717 |
args = gen_opparam_buf; |
1718 |
op_index = 0;
|
1719 |
|
1720 |
for(;;) {
|
1721 |
opc = gen_opc_buf[op_index]; |
1722 |
#ifdef CONFIG_PROFILER
|
1723 |
dyngen_table_op_count[opc]++; |
1724 |
#endif
|
1725 |
def = &tcg_op_defs[opc]; |
1726 |
#if 0
|
1727 |
printf("%s: %d %d %d\n", def->name,
|
1728 |
def->nb_oargs, def->nb_iargs, def->nb_cargs);
|
1729 |
// dump_regs(s);
|
1730 |
#endif
|
1731 |
switch(opc) {
|
1732 |
case INDEX_op_mov_i32:
|
1733 |
#if TCG_TARGET_REG_BITS == 64 |
1734 |
case INDEX_op_mov_i64:
|
1735 |
#endif
|
1736 |
dead_iargs = s->op_dead_iargs[op_index]; |
1737 |
tcg_reg_alloc_mov(s, def, args, dead_iargs); |
1738 |
break;
|
1739 |
case INDEX_op_nop:
|
1740 |
case INDEX_op_nop1:
|
1741 |
case INDEX_op_nop2:
|
1742 |
case INDEX_op_nop3:
|
1743 |
break;
|
1744 |
case INDEX_op_nopn:
|
1745 |
args += args[0];
|
1746 |
goto next;
|
1747 |
case INDEX_op_discard:
|
1748 |
{ |
1749 |
TCGTemp *ts; |
1750 |
ts = &s->temps[args[0]];
|
1751 |
/* mark the temporary as dead */
|
1752 |
if (ts->val_type != TEMP_VAL_CONST && !ts->fixed_reg) {
|
1753 |
if (ts->val_type == TEMP_VAL_REG)
|
1754 |
s->reg_to_temp[ts->reg] = -1;
|
1755 |
ts->val_type = TEMP_VAL_DEAD; |
1756 |
} |
1757 |
} |
1758 |
break;
|
1759 |
case INDEX_op_macro_goto:
|
1760 |
macro_op_index = op_index; /* only used for exceptions */
|
1761 |
op_index = args[0] - 1; |
1762 |
args = gen_opparam_buf + args[1];
|
1763 |
goto next;
|
1764 |
case INDEX_op_macro_end:
|
1765 |
macro_op_index = -1; /* only used for exceptions */ |
1766 |
op_index = args[0] - 1; |
1767 |
args = gen_opparam_buf + args[1];
|
1768 |
goto next;
|
1769 |
case INDEX_op_macro_start:
|
1770 |
/* must never happen here */
|
1771 |
tcg_abort(); |
1772 |
case INDEX_op_set_label:
|
1773 |
tcg_reg_alloc_bb_end(s); |
1774 |
tcg_out_label(s, args[0], (long)s->code_ptr); |
1775 |
break;
|
1776 |
case INDEX_op_call:
|
1777 |
dead_iargs = s->op_dead_iargs[op_index]; |
1778 |
args += tcg_reg_alloc_call(s, def, opc, args, dead_iargs); |
1779 |
goto next;
|
1780 |
case INDEX_op_end:
|
1781 |
goto the_end;
|
1782 |
|
1783 |
#ifndef CONFIG_NO_DYNGEN_OP
|
1784 |
case 0 ... INDEX_op_end - 1: |
1785 |
/* legacy dyngen ops */
|
1786 |
#ifdef CONFIG_PROFILER
|
1787 |
{ |
1788 |
extern int64_t dyngen_old_op_count;
|
1789 |
dyngen_old_op_count++; |
1790 |
} |
1791 |
#endif
|
1792 |
tcg_reg_alloc_bb_end(s); |
1793 |
if (search_pc >= 0) { |
1794 |
s->code_ptr += def->copy_size; |
1795 |
args += def->nb_args; |
1796 |
} else {
|
1797 |
args = dyngen_op(s, opc, args); |
1798 |
} |
1799 |
goto next;
|
1800 |
#endif
|
1801 |
default:
|
1802 |
/* Note: in order to speed up the code, it would be much
|
1803 |
faster to have specialized register allocator functions for
|
1804 |
some common argument patterns */
|
1805 |
dead_iargs = s->op_dead_iargs[op_index]; |
1806 |
tcg_reg_alloc_op(s, def, opc, args, dead_iargs); |
1807 |
break;
|
1808 |
} |
1809 |
args += def->nb_args; |
1810 |
next: ;
|
1811 |
if (search_pc >= 0 && search_pc < s->code_ptr - gen_code_buf) { |
1812 |
if (macro_op_index >= 0) |
1813 |
return macro_op_index;
|
1814 |
else
|
1815 |
return op_index;
|
1816 |
} |
1817 |
op_index++; |
1818 |
#ifndef NDEBUG
|
1819 |
check_regs(s); |
1820 |
#endif
|
1821 |
} |
1822 |
the_end:
|
1823 |
return -1; |
1824 |
} |
1825 |
|
1826 |
int dyngen_code(TCGContext *s, uint8_t *gen_code_buf)
|
1827 |
{ |
1828 |
#ifdef CONFIG_PROFILER
|
1829 |
{ |
1830 |
extern int64_t dyngen_op_count;
|
1831 |
extern int dyngen_op_count_max; |
1832 |
int n;
|
1833 |
n = (gen_opc_ptr - gen_opc_buf); |
1834 |
dyngen_op_count += n; |
1835 |
if (n > dyngen_op_count_max)
|
1836 |
dyngen_op_count_max = n; |
1837 |
} |
1838 |
#endif
|
1839 |
|
1840 |
tcg_gen_code_common(s, gen_code_buf, -1);
|
1841 |
|
1842 |
/* flush instruction cache */
|
1843 |
flush_icache_range((unsigned long)gen_code_buf, |
1844 |
(unsigned long)s->code_ptr); |
1845 |
return s->code_ptr - gen_code_buf;
|
1846 |
} |
1847 |
|
1848 |
/* Return the index of the micro operation such as the pc after is <
|
1849 |
offset bytes from the start of the TB. The contents of gen_code_buf must
|
1850 |
not be changed, though writing the same values is ok.
|
1851 |
Return -1 if not found. */
|
1852 |
int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset) |
1853 |
{ |
1854 |
return tcg_gen_code_common(s, gen_code_buf, offset);
|
1855 |
} |