diff options
Diffstat (limited to 'tcg/tcg.c')
| -rw-r--r-- | tcg/tcg.c | 1781 |
1 files changed, 1781 insertions, 0 deletions
diff --git a/tcg/tcg.c b/tcg/tcg.c new file mode 100644 index 0000000000..211e7fc987 --- /dev/null +++ b/tcg/tcg.c @@ -0,0 +1,1781 @@ +/* + * Tiny Code Generator for QEMU + * + * Copyright (c) 2008 Fabrice Bellard + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/* define it to suppress various consistency checks (faster) */ +#define NDEBUG + +/* define it to use liveness analysis (better code) */ +#define USE_LIVENESS_ANALYSIS + +#include <assert.h> +#include <stdarg.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <inttypes.h> + +#include "config.h" +#include "osdep.h" + +/* Note: the long term plan is to reduce the dependancies on the QEMU + CPU definitions. Currently they are used for qemu_ld/st + instructions */ +#define NO_CPU_IO_DEFS +#include "cpu.h" +#include "exec-all.h" + +#include "tcg-op.h" +#include "elf.h" + + +static void patch_reloc(uint8_t *code_ptr, int type, + tcg_target_long value); + +TCGOpDef tcg_op_defs[] = { +#define DEF(s, n, copy_size) { #s, 0, 0, n, n, 0, copy_size }, +#define DEF2(s, iargs, oargs, cargs, flags) { #s, iargs, oargs, cargs, iargs + oargs + cargs, flags, 0 }, +#include "tcg-opc.h" +#undef DEF +#undef DEF2 +}; + +TCGRegSet tcg_target_available_regs[2]; +TCGRegSet tcg_target_call_clobber_regs; + +/* XXX: move that inside the context */ +uint16_t *gen_opc_ptr; +TCGArg *gen_opparam_ptr; + +static inline void tcg_out8(TCGContext *s, uint8_t v) +{ + *s->code_ptr++ = v; +} + +static inline void tcg_out16(TCGContext *s, uint16_t v) +{ + *(uint16_t *)s->code_ptr = v; + s->code_ptr += 2; +} + +static inline void tcg_out32(TCGContext *s, uint32_t v) +{ + *(uint32_t *)s->code_ptr = v; + s->code_ptr += 4; +} + +/* label relocation processing */ + +void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type, + int label_index, long addend) +{ + TCGLabel *l; + TCGRelocation *r; + + l = &s->labels[label_index]; + if (l->has_value) { + patch_reloc(code_ptr, type, l->u.value + addend); + } else { + /* add a new relocation entry */ + r = tcg_malloc(sizeof(TCGRelocation)); + r->type = type; + r->ptr = code_ptr; + r->addend = addend; + r->next = l->u.first_reloc; + l->u.first_reloc = r; + } +} + +static void tcg_out_label(TCGContext *s, int label_index, + tcg_target_long value) +{ + TCGLabel *l; + TCGRelocation *r; + + l = &s->labels[label_index]; + if (l->has_value) + tcg_abort(); + r = l->u.first_reloc; + while (r != NULL) { + patch_reloc(r->ptr, r->type, value + r->addend); + r = r->next; + } + l->has_value = 1; + l->u.value = value; +} + +int gen_new_label(void) +{ + TCGContext *s = &tcg_ctx; + int idx; + TCGLabel *l; + + if (s->nb_labels >= TCG_MAX_LABELS) + tcg_abort(); + idx = s->nb_labels++; + l = &s->labels[idx]; + l->has_value = 0; + l->u.first_reloc = NULL; + return idx; +} + +#include "tcg-target.c" + +/* XXX: factorize */ +static void pstrcpy(char *buf, int buf_size, const char *str) +{ + int c; + char *q = buf; + + if (buf_size <= 0) + return; + + for(;;) { + c = *str++; + if (c == 0 || q >= buf + buf_size - 1) + break; + *q++ = c; + } + *q = '\0'; +} + +#if TCG_TARGET_REG_BITS == 32 +/* strcat and truncate. */ +static char *pstrcat(char *buf, int buf_size, const char *s) +{ + int len; + len = strlen(buf); + if (len < buf_size) + pstrcpy(buf + len, buf_size - len, s); + return buf; +} +#endif + +/* pool based memory allocation */ +void *tcg_malloc_internal(TCGContext *s, int size) +{ + TCGPool *p; + int pool_size; + + if (size > TCG_POOL_CHUNK_SIZE) { + /* big malloc: insert a new pool (XXX: could optimize) */ + p = qemu_malloc(sizeof(TCGPool) + size); + p->size = size; + if (s->pool_current) + s->pool_current->next = p; + else + s->pool_first = p; + p->next = s->pool_current; + } else { + p = s->pool_current; + if (!p) { + p = s->pool_first; + if (!p) + goto new_pool; + } else { + if (!p->next) { + new_pool: + pool_size = TCG_POOL_CHUNK_SIZE; + p = qemu_malloc(sizeof(TCGPool) + pool_size); + p->size = pool_size; + p->next = NULL; + if (s->pool_current) + s->pool_current->next = p; + else + s->pool_first = p; + } else { + p = p->next; + } + } + } + s->pool_current = p; + s->pool_cur = p->data + size; + s->pool_end = p->data + p->size; + return p->data; +} + +void tcg_pool_reset(TCGContext *s) +{ + s->pool_cur = s->pool_end = NULL; + s->pool_current = NULL; +} + +/* free all the pool */ +void tcg_pool_free(TCGContext *s) +{ + TCGPool *p, *p1; + + for(p = s->pool_first; p != NULL; p = p1) { + p1 = p->next; + qemu_free(p); + } + s->pool_first = NULL; + s->pool_cur = s->pool_end = NULL; +} + +void tcg_context_init(TCGContext *s) +{ + int op, total_args, n; + TCGOpDef *def; + TCGArgConstraint *args_ct; + int *sorted_args; + + memset(s, 0, sizeof(*s)); + s->temps = s->static_temps; + s->nb_globals = 0; + + /* Count total number of arguments and allocate the corresponding + space */ + total_args = 0; + for(op = 0; op < NB_OPS; op++) { + def = &tcg_op_defs[op]; + n = def->nb_iargs + def->nb_oargs; + total_args += n; + } + + args_ct = qemu_malloc(sizeof(TCGArgConstraint) * total_args); + sorted_args = qemu_malloc(sizeof(int) * total_args); + + for(op = 0; op < NB_OPS; op++) { + def = &tcg_op_defs[op]; + def->args_ct = args_ct; + def->sorted_args = sorted_args; + n = def->nb_iargs + def->nb_oargs; + sorted_args += n; + args_ct += n; + } + + tcg_target_init(s); +} + +void tcg_set_frame(TCGContext *s, int reg, + tcg_target_long start, tcg_target_long size) +{ + s->frame_start = start; + s->frame_end = start + size; + s->frame_reg = reg; +} + +void tcg_set_macro_func(TCGContext *s, TCGMacroFunc *func) +{ + s->macro_func = func; +} + +void tcg_func_start(TCGContext *s) +{ + tcg_pool_reset(s); + s->nb_temps = s->nb_globals; + s->labels = tcg_malloc(sizeof(TCGLabel) * TCG_MAX_LABELS); + s->nb_labels = 0; + s->current_frame_offset = s->frame_start; + + gen_opc_ptr = gen_opc_buf; + gen_opparam_ptr = gen_opparam_buf; +} + +static inline void tcg_temp_alloc(TCGContext *s, int n) +{ + if (n > TCG_MAX_TEMPS) + tcg_abort(); +} + +int tcg_global_reg_new(TCGType type, int reg, const char *name) +{ + TCGContext *s = &tcg_ctx; + TCGTemp *ts; + int idx; + +#if TCG_TARGET_REG_BITS == 32 + if (type != TCG_TYPE_I32) + tcg_abort(); +#endif + if (tcg_regset_test_reg(s->reserved_regs, reg)) + tcg_abort(); + idx = s->nb_globals; + tcg_temp_alloc(s, s->nb_globals + 1); + ts = &s->temps[s->nb_globals]; + ts->base_type = type; + ts->type = type; + ts->fixed_reg = 1; + ts->reg = reg; + ts->val_type = TEMP_VAL_REG; + ts->name = name; + s->nb_globals++; + tcg_regset_set_reg(s->reserved_regs, reg); + return idx; +} + +int tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset, + const char *name) +{ + TCGContext *s = &tcg_ctx; + TCGTemp *ts; + int idx; + + idx = s->nb_globals; +#if TCG_TARGET_REG_BITS == 32 + if (type == TCG_TYPE_I64) { + char buf[64]; + tcg_temp_alloc(s, s->nb_globals + 1); + ts = &s->temps[s->nb_globals]; + ts->base_type = type; + ts->type = TCG_TYPE_I32; + ts->fixed_reg = 0; + ts->mem_allocated = 1; + ts->mem_reg = reg; +#ifdef TCG_TARGET_WORDS_BIGENDIAN + ts->mem_offset = offset + 4; +#else + ts->mem_offset = offset; +#endif + ts->val_type = TEMP_VAL_MEM; + pstrcpy(buf, sizeof(buf), name); + pstrcat(buf, sizeof(buf), "_0"); + ts->name = strdup(buf); + ts++; + + ts->base_type = type; + ts->type = TCG_TYPE_I32; + ts->fixed_reg = 0; + ts->mem_allocated = 1; + ts->mem_reg = reg; +#ifdef TCG_TARGET_WORDS_BIGENDIAN + ts->mem_offset = offset; +#else + ts->mem_offset = offset + 4; +#endif + ts->val_type = TEMP_VAL_MEM; + pstrcpy(buf, sizeof(buf), name); + pstrcat(buf, sizeof(buf), "_1"); + ts->name = strdup(buf); + + s->nb_globals += 2; + } else +#endif + { + tcg_temp_alloc(s, s->nb_globals + 1); + ts = &s->temps[s->nb_globals]; + ts->base_type = type; + ts->type = type; + ts->fixed_reg = 0; + ts->mem_allocated = 1; + ts->mem_reg = reg; + ts->mem_offset = offset; + ts->val_type = TEMP_VAL_MEM; + ts->name = name; + s->nb_globals++; + } + return idx; +} + +int tcg_temp_new(TCGType type) +{ + TCGContext *s = &tcg_ctx; + TCGTemp *ts; + int idx; + + idx = s->nb_temps; +#if TCG_TARGET_REG_BITS == 32 + if (type == TCG_TYPE_I64) { + tcg_temp_alloc(s, s->nb_temps + 1); + ts = &s->temps[s->nb_temps]; + ts->base_type = type; + ts->type = TCG_TYPE_I32; + ts->val_type = TEMP_VAL_DEAD; + ts->mem_allocated = 0; + ts->name = NULL; + ts++; + ts->base_type = TCG_TYPE_I32; + ts->type = TCG_TYPE_I32; + ts->val_type = TEMP_VAL_DEAD; + ts->mem_allocated = 0; + ts->name = NULL; + s->nb_temps += 2; + } else +#endif + { + tcg_temp_alloc(s, s->nb_temps + 1); + ts = &s->temps[s->nb_temps]; + ts->base_type = type; + ts->type = type; + ts->val_type = TEMP_VAL_DEAD; + ts->mem_allocated = 0; + ts->name = NULL; + s->nb_temps++; + } + return idx; +} + +int tcg_const_i32(int32_t val) +{ + TCGContext *s = &tcg_ctx; + TCGTemp *ts; + int idx; + + idx = s->nb_temps; + tcg_temp_alloc(s, idx + 1); + ts = &s->temps[idx]; + ts->base_type = ts->type = TCG_TYPE_I32; + ts->val_type = TEMP_VAL_CONST; + ts->name = NULL; + ts->val = val; + s->nb_temps++; + return idx; +} + +int tcg_const_i64(int64_t val) +{ + TCGContext *s = &tcg_ctx; + TCGTemp *ts; + int idx; + + idx = s->nb_temps; +#if TCG_TARGET_REG_BITS == 32 + tcg_temp_alloc(s, idx + 2); + ts = &s->temps[idx]; + ts->base_type = TCG_TYPE_I64; + ts->type = TCG_TYPE_I32; + ts->val_type = TEMP_VAL_CONST; + ts->name = NULL; + ts->val = val; + ts++; + ts->base_type = TCG_TYPE_I32; + ts->type = TCG_TYPE_I32; + ts->val_type = TEMP_VAL_CONST; + ts->name = NULL; + ts->val = val >> 32; + s->nb_temps += 2; +#else + tcg_temp_alloc(s, idx + 1); + ts = &s->temps[idx]; + ts->base_type = ts->type = TCG_TYPE_I64; + ts->val_type = TEMP_VAL_CONST; + ts->name = NULL; + ts->val = val; + s->nb_temps++; +#endif + return idx; +} + +void tcg_register_helper(void *func, const char *name) +{ + TCGContext *s = &tcg_ctx; + int n; + if ((s->nb_helpers + 1) > s->allocated_helpers) { + n = s->allocated_helpers; + if (n == 0) { + n = 4; + } else { + n *= 2; + } + s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo)); + s->allocated_helpers = n; + } + s->helpers[s->nb_helpers].func = func; + s->helpers[s->nb_helpers].name = name; + s->nb_helpers++; +} + +const char *tcg_helper_get_name(TCGContext *s, void *func) +{ + int i; + + for(i = 0; i < s->nb_helpers; i++) { + if (s->helpers[i].func == func) + return s->helpers[i].name; + } + return NULL; +} + +static inline TCGType tcg_get_base_type(TCGContext *s, TCGArg arg) +{ + return s->temps[arg].base_type; +} + +static void tcg_gen_call_internal(TCGContext *s, TCGArg func, + unsigned int flags, + unsigned int nb_rets, const TCGArg *rets, + unsigned int nb_params, const TCGArg *params) +{ + int i; + *gen_opc_ptr++ = INDEX_op_call; + *gen_opparam_ptr++ = (nb_rets << 16) | (nb_params + 1); + for(i = 0; i < nb_rets; i++) { + *gen_opparam_ptr++ = rets[i]; + } + for(i = 0; i < nb_params; i++) { + *gen_opparam_ptr++ = params[i]; + } + *gen_opparam_ptr++ = func; + + *gen_opparam_ptr++ = flags; + /* total parameters, needed to go backward in the instruction stream */ + *gen_opparam_ptr++ = 1 + nb_rets + nb_params + 3; +} + + +#if TCG_TARGET_REG_BITS < 64 +/* Note: we convert the 64 bit args to 32 bit */ +void tcg_gen_call(TCGContext *s, TCGArg func, unsigned int flags, + unsigned int nb_rets, const TCGArg *rets, + unsigned int nb_params, const TCGArg *args1) +{ + TCGArg ret, *args2, rets_2[2], arg; + int j, i, call_type; + + if (nb_rets == 1) { + ret = rets[0]; + if (tcg_get_base_type(s, ret) == TCG_TYPE_I64) { + nb_rets = 2; + rets_2[0] = ret; + rets_2[1] = ret + 1; + rets = rets_2; + } + } + args2 = alloca((nb_params * 2) * sizeof(TCGArg)); + j = 0; + call_type = (flags & TCG_CALL_TYPE_MASK); + for(i = 0; i < nb_params; i++) { + arg = args1[i]; + if (tcg_get_base_type(s, arg) == TCG_TYPE_I64) { +#ifdef TCG_TARGET_I386 + /* REGPARM case: if the third parameter is 64 bit, it is + allocated on the stack */ + if (j == 2 && call_type == TCG_CALL_TYPE_REGPARM) { + call_type = TCG_CALL_TYPE_REGPARM_2; + flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type; + } + args2[j++] = arg; + args2[j++] = arg + 1; +#else +#ifdef TCG_TARGET_WORDS_BIGENDIAN + args2[j++] = arg + 1; + args2[j++] = arg; +#else + args2[j++] = arg; + args2[j++] = arg + 1; +#endif +#endif + } else { + args2[j++] = arg; + } + } + tcg_gen_call_internal(s, func, flags, + nb_rets, rets, j, args2); +} +#else +void tcg_gen_call(TCGContext *s, TCGArg func, unsigned int flags, + unsigned int nb_rets, const TCGArg *rets, + unsigned int nb_params, const TCGArg *args1) +{ + tcg_gen_call_internal(s, func, flags, + nb_rets, rets, nb_params, args1); +} +#endif + +void tcg_gen_shifti_i64(TCGArg ret, TCGArg arg1, + int c, int right, int arith) +{ + if (c == 0) + return; + if (c >= 32) { + c -= 32; + if (right) { + if (arith) { + tcg_gen_sari_i32(ret, arg1 + 1, c); + tcg_gen_sari_i32(ret + 1, arg1 + 1, 31); + } else { + tcg_gen_shri_i32(ret, arg1 + 1, c); + tcg_gen_movi_i32(ret + 1, 0); + } + } else { + tcg_gen_shli_i32(ret + 1, arg1, c); + tcg_gen_movi_i32(ret, 0); + } + } else { + int t0, t1; + + t0 = tcg_temp_new(TCG_TYPE_I32); + t1 = tcg_temp_new(TCG_TYPE_I32); + if (right) { + tcg_gen_shli_i32(t0, arg1 + 1, 32 - c); + if (arith) + tcg_gen_sari_i32(t1, arg1 + 1, c); + else + tcg_gen_shri_i32(t1, arg1 + 1, c); + tcg_gen_shri_i32(ret, arg1, c); + tcg_gen_or_i32(ret, ret, t0); + tcg_gen_mov_i32(ret + 1, t1); + } else { + tcg_gen_shri_i32(t0, arg1, 32 - c); + /* Note: ret can be the same as arg1, so we use t1 */ + tcg_gen_shli_i32(t1, arg1, c); + tcg_gen_shli_i32(ret + 1, arg1 + 1, c); + tcg_gen_or_i32(ret + 1, ret + 1, t0); + tcg_gen_mov_i32(ret, t1); + } + } +} + +void tcg_reg_alloc_start(TCGContext *s) +{ + int i; + TCGTemp *ts; + for(i = 0; i < s->nb_globals; i++) { + ts = &s->temps[i]; + if (ts->fixed_reg) { + ts->val_type = TEMP_VAL_REG; + } else { + ts->val_type = TEMP_VAL_MEM; + } + } + for(i = 0; i < TCG_TARGET_NB_REGS; i++) { + s->reg_to_temp[i] = -1; + } +} + +char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGArg arg) +{ + TCGTemp *ts; + if (arg < s->nb_globals) { + pstrcpy(buf, buf_size, s->temps[arg].name); + } else { + ts = &s->temps[arg]; + if (ts->val_type == TEMP_VAL_CONST) { + snprintf(buf, buf_size, "$0x%" TCG_PRIlx , ts->val); + } else { + snprintf(buf, buf_size, "tmp%d", (int)arg - s->nb_globals); + } + } + return buf; +} + +void tcg_dump_ops(TCGContext *s, FILE *outfile) +{ + const uint16_t *opc_ptr; + const TCGArg *args; + TCGArg arg; + int c, i, k, nb_oargs, nb_iargs, nb_cargs; + const TCGOpDef *def; + char buf[128]; + + opc_ptr = gen_opc_buf; + args = gen_opparam_buf; + while (opc_ptr < gen_opc_ptr) { + c = *opc_ptr++; + def = &tcg_op_defs[c]; + fprintf(outfile, " %s ", def->name); + if (c == INDEX_op_call) { + TCGArg arg; + /* variable number of arguments */ + arg = *args++; + nb_oargs = arg >> 16; + nb_iargs = arg & 0xffff; + nb_cargs = def->nb_cargs; + } else if (c == INDEX_op_nopn) { + /* variable number of arguments */ + nb_cargs = *args; + nb_oargs = 0; + nb_iargs = 0; + } else { + nb_oargs = def->nb_oargs; + nb_iargs = def->nb_iargs; + nb_cargs = def->nb_cargs; + } + + k = 0; + for(i = 0; i < nb_oargs; i++) { + if (k != 0) + fprintf(outfile, ","); + fprintf(outfile, "%s", tcg_get_arg_str(s, buf, sizeof(buf), args[k++])); + } + for(i = 0; i < nb_iargs; i++) { + if (k != 0) + fprintf(outfile, ","); + /* XXX: dump helper name for call */ + fprintf(outfile, "%s", tcg_get_arg_str(s, buf, sizeof(buf), args[k++])); + } + for(i = 0; i < nb_cargs; i++) { + if (k != 0) + fprintf(outfile, ","); + arg = args[k++]; + fprintf(outfile, "$0x%" TCG_PRIlx, arg); + } + fprintf(outfile, "\n"); + args += nb_iargs + nb_oargs + nb_cargs; + } +} + +/* we give more priority to constraints with less registers */ +static int get_constraint_priority(const TCGOpDef *def, int k) +{ + const TCGArgConstraint *arg_ct; + + int i, n; + arg_ct = &def->args_ct[k]; + if (arg_ct->ct & TCG_CT_ALIAS) { + /* an alias is equivalent to a single register */ + n = 1; + } else { + if (!(arg_ct->ct & TCG_CT_REG)) + return 0; + n = 0; + for(i = 0; i < TCG_TARGET_NB_REGS; i++) { + if (tcg_regset_test_reg(arg_ct->u.regs, i)) + n++; + } + } + return TCG_TARGET_NB_REGS - n + 1; +} + +/* sort from highest priority to lowest */ +static void sort_constraints(TCGOpDef *def, int start, int n) +{ + int i, j, p1, p2, tmp; + + for(i = 0; i < n; i++) + def->sorted_args[start + i] = start + i; + if (n <= 1) + return; + for(i = 0; i < n - 1; i++) { + for(j = i + 1; j < n; j++) { + p1 = get_constraint_priority(def, def->sorted_args[start + i]); + p2 = get_constraint_priority(def, def->sorted_args[start + j]); + if (p1 < p2) { + tmp = def->sorted_args[start + i]; + def->sorted_args[start + i] = def->sorted_args[start + j]; + def->sorted_args[start + j] = tmp; + } + } + } +} + +void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs) +{ + int op; + TCGOpDef *def; + const char *ct_str; + int i, nb_args; + + for(;;) { + if (tdefs->op < 0) + break; + op = tdefs->op; + assert(op >= 0 && op < NB_OPS); + def = &tcg_op_defs[op]; + nb_args = def->nb_iargs + def->nb_oargs; + for(i = 0; i < nb_args; i++) { + ct_str = tdefs->args_ct_str[i]; + tcg_regset_clear(def->args_ct[i].u.regs); + def->args_ct[i].ct = 0; + if (ct_str[0] >= '0' && ct_str[0] <= '9') { + int oarg; + oarg = ct_str[0] - '0'; + assert(oarg < def->nb_oargs); + assert(def->args_ct[oarg].ct & TCG_CT_REG); + /* TCG_CT_ALIAS is for the output arguments. The input + argument is tagged with TCG_CT_IALIAS for + informative purposes. */ + def->args_ct[i] = def->args_ct[oarg]; + def->args_ct[oarg].ct = i | TCG_CT_ALIAS; + def->args_ct[i].ct |= TCG_CT_IALIAS; + } else { + for(;;) { + if (*ct_str == '\0') + break; + switch(*ct_str) { + case 'i': + def->args_ct[i].ct |= TCG_CT_CONST; + ct_str++; + break; + default: + if (target_parse_constraint(&def->args_ct[i], &ct_str) < 0) { + fprintf(stderr, "Invalid constraint '%s' for arg %d of operation '%s'\n", + ct_str, i, def->name); + exit(1); + } + } + } + } + } + + /* sort the constraints (XXX: this is just an heuristic) */ + sort_constraints(def, 0, def->nb_oargs); + sort_constraints(def, def->nb_oargs, def->nb_iargs); + +#if 0 + { + int i; + + printf("%s: sorted=", def->name); + for(i = 0; i < def->nb_oargs + def->nb_iargs; i++) + printf(" %d", def->sorted_args[i]); + printf("\n"); + } +#endif + tdefs++; + } + +} + +#ifdef USE_LIVENESS_ANALYSIS + +/* set a nop for an operation using 'nb_args' */ +static inline void tcg_set_nop(TCGContext *s, uint16_t *opc_ptr, + TCGArg *args, int nb_args) +{ + if (nb_args == 0) { + *opc_ptr = INDEX_op_nop; + } else { + *opc_ptr = INDEX_op_nopn; + args[0] = nb_args; + args[nb_args - 1] = nb_args; + } +} + +/* liveness analysis: end of basic block: globals are live, temps are dead */ +static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps) +{ + memset(dead_temps, 0, s->nb_globals); + memset(dead_temps + s->nb_globals, 1, s->nb_temps - s->nb_globals); +} + +/* Liveness analysis : update the opc_dead_iargs array to tell if a + given input arguments is dead. Instructions updating dead + temporaries are removed. */ +void tcg_liveness_analysis(TCGContext *s) +{ + int i, op_index, op, nb_args, nb_iargs, nb_oargs, arg, nb_ops; + TCGArg *args; + const TCGOpDef *def; + uint8_t *dead_temps; + unsigned int dead_iargs; + + gen_opc_ptr++; /* skip end */ + + nb_ops = gen_opc_ptr - gen_opc_buf; + + /* XXX: make it really dynamic */ + s->op_dead_iargs = tcg_malloc(OPC_BUF_SIZE * sizeof(uint16_t)); + + dead_temps = tcg_malloc(s->nb_temps); + memset(dead_temps, 1, s->nb_temps); + + args = gen_opparam_ptr; + op_index = nb_ops - 1; + while (op_index >= 0) { + op = gen_opc_buf[op_index]; + def = &tcg_op_defs[op]; + switch(op) { + case INDEX_op_call: + nb_args = args[-1]; + args -= nb_args; + nb_iargs = args[0] & 0xffff; + nb_oargs = args[0] >> 16; + args++; + + /* output args are dead */ + for(i = 0; i < nb_oargs; i++) { + arg = args[i]; + dead_temps[arg] = 1; + } + + /* globals are live (they may be used by the call) */ + memset(dead_temps, 0, s->nb_globals); + + /* input args are live */ + dead_iargs = 0; + for(i = 0; i < nb_iargs; i++) { + arg = args[i + nb_oargs]; + if (dead_temps[arg]) { + dead_iargs |= (1 << i); + } + dead_temps[arg] = 0; + } + s->op_dead_iargs[op_index] = dead_iargs; + args--; + break; + case INDEX_op_set_label: + args--; + /* mark end of basic block */ + tcg_la_bb_end(s, dead_temps); + break; + case INDEX_op_nopn: + nb_args = args[-1]; + args -= nb_args; + break; + case INDEX_op_macro_2: + { + int dead_args[2], macro_id; + int saved_op_index, saved_arg_index; + int macro_op_index, macro_arg_index; + int macro_end_op_index, macro_end_arg_index; + int last_nb_temps; + + nb_args = 3; + args -= nb_args; + dead_args[0] = dead_temps[args[0]]; + dead_args[1] = dead_temps[args[1]]; + macro_id = args[2]; + + /* call the macro function which generate code + depending on the live outputs */ + saved_op_index = op_index; + saved_arg_index = args - gen_opparam_buf; + + /* add a macro start instruction */ + *gen_opc_ptr++ = INDEX_op_macro_start; + *gen_opparam_ptr++ = saved_op_index; + *gen_opparam_ptr++ = saved_arg_index; + + macro_op_index = gen_opc_ptr - gen_opc_buf; + macro_arg_index = gen_opparam_ptr - gen_opparam_buf; + + last_nb_temps = s->nb_temps; + + s->macro_func(s, macro_id, dead_args); + + /* realloc temp info (XXX: make it faster) */ + if (s->nb_temps > last_nb_temps) { + uint8_t *new_dead_temps; + + new_dead_temps = tcg_malloc(s->nb_temps); + memcpy(new_dead_temps, dead_temps, last_nb_temps); + memset(new_dead_temps + last_nb_temps, 1, + s->nb_temps - last_nb_temps); + dead_temps = new_dead_temps; + } + + macro_end_op_index = gen_opc_ptr - gen_opc_buf; + macro_end_arg_index = gen_opparam_ptr - gen_opparam_buf; + + /* end of macro: add a goto to the next instruction */ + *gen_opc_ptr++ = INDEX_op_macro_end; + *gen_opparam_ptr++ = op_index + 1; + *gen_opparam_ptr++ = saved_arg_index + nb_args; + + /* modify the macro operation to be a macro_goto */ + gen_opc_buf[op_index] = INDEX_op_macro_goto; + args[0] = macro_op_index; + args[1] = macro_arg_index; + args[2] = 0; /* dummy third arg to match the + macro parameters */ + + /* set the next instruction to the end of the macro */ + op_index = macro_end_op_index; + args = macro_end_arg_index + gen_opparam_buf; + } + break; + case INDEX_op_macro_start: + args -= 2; + op_index = args[0]; + args = gen_opparam_buf + args[1]; + break; + case INDEX_op_macro_goto: + case INDEX_op_macro_end: + tcg_abort(); /* should never happen in liveness analysis */ + case INDEX_op_end: + break; + /* XXX: optimize by hardcoding common cases (e.g. triadic ops) */ + default: + if (op > INDEX_op_end) { + args -= def->nb_args; + nb_iargs = def->nb_iargs; + nb_oargs = def->nb_oargs; + + /* Test if the operation can be removed because all + its outputs are dead. We may add a flag to + explicitely tell if the op has side + effects. Currently we assume that if nb_oargs == 0 + or OPF_BB_END is set, the operation has side + effects and cannot be removed */ + if (nb_oargs != 0 && !(def->flags & TCG_OPF_BB_END)) { + for(i = 0; i < nb_oargs; i++) { + arg = args[i]; + if (!dead_temps[arg]) + goto do_not_remove; + } + tcg_set_nop(s, gen_opc_buf + op_index, args, def->nb_args); +#ifdef CONFIG_PROFILER + { + extern int64_t dyngen_tcg_del_op_count; + dyngen_tcg_del_op_count++; + } +#endif + } else { + do_not_remove: + + /* output args are dead */ + for(i = 0; i < nb_oargs; i++) { + arg = args[i]; + dead_temps[arg] = 1; + } + + /* if end of basic block, update */ + if (def->flags & TCG_OPF_BB_END) { + tcg_la_bb_end(s, dead_temps); + } + + /* input args are live */ + dead_iargs = 0; + for(i = 0; i < nb_iargs; i++) { + arg = args[i + nb_oargs]; + if (dead_temps[arg]) { + dead_iargs |= (1 << i); + } + dead_temps[arg] = 0; + } + s->op_dead_iargs[op_index] = dead_iargs; + } + } else { + /* legacy dyngen operations */ + args -= def->nb_args; + /* mark end of basic block */ + tcg_la_bb_end(s, dead_temps); + } + break; + } + op_index--; + } + + if (args != gen_opparam_buf) + tcg_abort(); +} +#else +/* dummy liveness analysis */ +void tcg_liveness_analysis(TCGContext *s) +{ + int nb_ops; + nb_ops = gen_opc_ptr - gen_opc_buf; + + s->op_dead_iargs = tcg_malloc(nb_ops * sizeof(uint16_t)); + memset(s->op_dead_iargs, 0, nb_ops * sizeof(uint16_t)); +} +#endif + +#ifndef NDEBUG +static void dump_regs(TCGContext *s) +{ + TCGTemp *ts; + int i; + char buf[64]; + + for(i = 0; i < s->nb_temps; i++) { + ts = &s->temps[i]; + printf(" %10s: ", tcg_get_arg_str(s, buf, sizeof(buf), i)); + switch(ts->val_type) { + case TEMP_VAL_REG: + printf("%s", tcg_target_reg_names[ts->reg]); + break; + case TEMP_VAL_MEM: + printf("%d(%s)", (int)ts->mem_offset, tcg_target_reg_names[ts->mem_reg]); + break; + case TEMP_VAL_CONST: + printf("$0x%" TCG_PRIlx, ts->val); + break; + case TEMP_VAL_DEAD: + printf("D"); + break; + default: + printf("???"); + break; + } + printf("\n"); + } + + for(i = 0; i < TCG_TARGET_NB_REGS; i++) { + if (s->reg_to_temp[i] >= 0) { + printf("%s: %s\n", + tcg_target_reg_names[i], + tcg_get_arg_str(s, buf, sizeof(buf), s->reg_to_temp[i])); + } + } +} + +static void check_regs(TCGContext *s) +{ + int reg, k; + TCGTemp *ts; + char buf[64]; + + for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { + k = s->reg_to_temp[reg]; + if (k >= 0) { + ts = &s->temps[k]; + if (ts->val_type != TEMP_VAL_REG || + ts->reg != reg) { + printf("Inconsistency for register %s:\n", + tcg_target_reg_names[reg]); + printf("reg state:\n"); + dump_regs(s); + tcg_abort(); + } + } + } + for(k = 0; k < s->nb_temps; k++) { + ts = &s->temps[k]; + if (ts->val_type == TEMP_VAL_REG && + !ts->fixed_reg && + s->reg_to_temp[ts->reg] != k) { + printf("Inconsistency for temp %s:\n", + tcg_get_arg_str(s, buf, sizeof(buf), k)); + printf("reg state:\n"); + dump_regs(s); + tcg_abort(); + } + } +} +#endif + +static void temp_allocate_frame(TCGContext *s, int temp) +{ + TCGTemp *ts; + ts = &s->temps[temp]; + s->current_frame_offset = (s->current_frame_offset + sizeof(tcg_target_long) - 1) & ~(sizeof(tcg_target_long) - 1); + if (s->current_frame_offset + sizeof(tcg_target_long) > s->frame_end) + abort(); + ts->mem_offset = s->current_frame_offset; + ts->mem_reg = s->frame_reg; + ts->mem_allocated = 1; + s->current_frame_offset += sizeof(tcg_target_long); +} + +/* free register 'reg' by spilling the corresponding temporary if necessary */ +static void tcg_reg_free(TCGContext *s, int reg) +{ + TCGTemp *ts; + int temp; + + temp = s->reg_to_temp[reg]; + if (temp != -1) { + ts = &s->temps[temp]; + assert(ts->val_type == TEMP_VAL_REG); + if (!ts->mem_coherent) { + if (!ts->mem_allocated) + temp_allocate_frame(s, temp); + tcg_out_st(s, reg, ts->mem_reg, ts->mem_offset); + } + ts->val_type = TEMP_VAL_MEM; + s->reg_to_temp[reg] = -1; + } +} + +/* Allocate a register belonging to reg1 & ~reg2 */ +static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2) +{ + int i, reg; + TCGRegSet reg_ct; + + tcg_regset_andnot(reg_ct, reg1, reg2); + + /* first try free registers */ + for(i = 0; i < TCG_TARGET_NB_REGS; i++) { + reg = tcg_target_reg_alloc_order[i]; + if (tcg_regset_test_reg(reg_ct, reg) && s->reg_to_temp[reg] == -1) + return reg; + } + + /* XXX: do better spill choice */ + for(i = 0; i < TCG_TARGET_NB_REGS; i++) { + reg = tcg_target_reg_alloc_order[i]; + if (tcg_regset_test_reg(reg_ct, reg)) { + tcg_reg_free(s, reg); + return reg; + } + } + + tcg_abort(); +} + +/* at the end of a basic block, we assume all temporaries are dead and + all globals are stored at their canonical location */ +/* XXX: optimize by handling constants in another array ? */ +void tcg_reg_alloc_bb_end(TCGContext *s) +{ + TCGTemp *ts; + int i; + + for(i = 0; i < s->nb_globals; i++) { + ts = &s->temps[i]; + if (!ts->fixed_reg) { + if (ts->val_type == TEMP_VAL_REG) { + tcg_reg_free(s, ts->reg); + } + } + } + + for(i = s->nb_globals; i < s->nb_temps; i++) { + ts = &s->temps[i]; + if (ts->val_type != TEMP_VAL_CONST) { + if (ts->val_type == TEMP_VAL_REG) { + s->reg_to_temp[ts->reg] = -1; + } + ts->val_type = TEMP_VAL_DEAD; + } + } +} + +#define IS_DEAD_IARG(n) ((dead_iargs >> (n)) & 1) + +static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def, + const TCGArg *args, + unsigned int dead_iargs) +{ + TCGTemp *ts, *ots; + int reg; + const TCGArgConstraint *arg_ct; + + ots = &s->temps[args[0]]; + ts = &s->temps[args[1]]; + arg_ct = &def->args_ct[0]; + + if (ts->val_type == TEMP_VAL_REG) { + if (IS_DEAD_IARG(0) && !ts->fixed_reg && !ots->fixed_reg) { + /* the mov can be suppressed */ + if (ots->val_type == TEMP_VAL_REG) + s->reg_to_temp[ots->reg] = -1; + reg = ts->reg; + s->reg_to_temp[reg] = -1; + ts->val_type = TEMP_VAL_DEAD; + } else { + if (ots->val_type == TEMP_VAL_REG) { + reg = ots->reg; + } else { + reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); + } + if (ts->reg != reg) { + tcg_out_mov(s, reg, ts->reg); + } + } + } else if (ts->val_type == TEMP_VAL_MEM) { + if (ots->val_type == TEMP_VAL_REG) { + reg = ots->reg; + } else { + reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); + } + tcg_out_ld(s, reg, ts->mem_reg, ts->mem_offset); + } else if (ts->val_type == TEMP_VAL_CONST) { + if (ots->val_type == TEMP_VAL_REG) { + reg = ots->reg; + } else { + reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); + } + tcg_out_movi(s, ots->type, reg, ts->val); + } else { + tcg_abort(); + } + s->reg_to_temp[reg] = args[0]; + ots->reg = reg; + ots->val_type = TEMP_VAL_REG; + ots->mem_coherent = 0; +} + +static void tcg_reg_alloc_op(TCGContext *s, + const TCGOpDef *def, int opc, + const TCGArg *args, + unsigned int dead_iargs) +{ + TCGRegSet allocated_regs; + int i, k, nb_iargs, nb_oargs, reg; + TCGArg arg; + const TCGArgConstraint *arg_ct; + TCGTemp *ts; + TCGArg new_args[TCG_MAX_OP_ARGS]; + int const_args[TCG_MAX_OP_ARGS]; + + nb_oargs = def->nb_oargs; + nb_iargs = def->nb_iargs; + + /* copy constants */ + memcpy(new_args + nb_oargs + nb_iargs, + args + nb_oargs + nb_iargs, + sizeof(TCGArg) * def->nb_cargs); + + /* satisfy input constraints */ + tcg_regset_set(allocated_regs, s->reserved_regs); + for(k = 0; k < nb_iargs; k++) { + i = def->sorted_args[nb_oargs + k]; + arg = args[i]; + arg_ct = &def->args_ct[i]; + ts = &s->temps[arg]; + if (ts->val_type == TEMP_VAL_MEM) { + reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); + tcg_out_ld(s, reg, ts->mem_reg, ts->mem_offset); + ts->val_type = TEMP_VAL_REG; + ts->reg = reg; + ts->mem_coherent = 1; + s->reg_to_temp[reg] = arg; + } else if (ts->val_type == TEMP_VAL_CONST) { + if (tcg_target_const_match(ts->val, arg_ct)) { + /* constant is OK for instruction */ + const_args[i] = 1; + new_args[i] = ts->val; + goto iarg_end; + } else { + /* need to move to a register*/ + reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); + tcg_out_movi(s, ts->type, reg, ts->val); + goto iarg_end1; + } + } + assert(ts->val_type == TEMP_VAL_REG); + if ((arg_ct->ct & TCG_CT_IALIAS) && + !IS_DEAD_IARG(i - nb_oargs)) { + /* if the input is aliased to an output and if it is + not dead after the instruction, we must allocate + a new register and move it */ + goto allocate_in_reg; + } + reg = ts->reg; + if (tcg_regset_test_reg(arg_ct->u.regs, reg)) { + /* nothing to do : the constraint is satisfied */ + } else { + allocate_in_reg: + /* allocate a new register matching the constraint + and move the temporary register into it */ + reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); + tcg_out_mov(s, reg, ts->reg); + } + iarg_end1: + new_args[i] = reg; + const_args[i] = 0; + tcg_regset_set_reg(allocated_regs, reg); + iarg_end: ; + } + + /* mark dead temporaries and free the associated registers */ + for(i = 0; i < nb_iargs; i++) { + arg = args[nb_oargs + i]; + if (IS_DEAD_IARG(i)) { + ts = &s->temps[arg]; + if (ts->val_type != TEMP_VAL_CONST && !ts->fixed_reg) { + if (ts->val_type == TEMP_VAL_REG) + s->reg_to_temp[ts->reg] = -1; + ts->val_type = TEMP_VAL_DEAD; + } + } + } + + /* XXX: permit generic clobber register list ? */ + if (def->flags & TCG_OPF_CALL_CLOBBER) { + for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { + if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) { + tcg_reg_free(s, reg); + } + } + } + + /* satisfy the output constraints */ + tcg_regset_set(allocated_regs, s->reserved_regs); + for(k = 0; k < nb_oargs; k++) { + i = def->sorted_args[k]; + arg = args[i]; + arg_ct = &def->args_ct[i]; + ts = &s->temps[arg]; + if (arg_ct->ct & TCG_CT_ALIAS) { + reg = new_args[arg_ct->ct & ~TCG_CT_ALIAS]; + } else { + /* if fixed register, we try to use it */ + reg = ts->reg; + if (ts->fixed_reg && + tcg_regset_test_reg(arg_ct->u.regs, reg)) { + goto oarg_end; + } + reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); + } + tcg_regset_set_reg(allocated_regs, reg); + /* if a fixed register is used, then a move will be done afterwards */ + if (!ts->fixed_reg) { + if (ts->val_type == TEMP_VAL_REG) + s->reg_to_temp[ts->reg] = -1; + ts->val_type = TEMP_VAL_REG; + ts->reg = reg; + /* temp value is modified, so the value kept in memory is + potentially not the same */ + ts->mem_coherent = 0; + s->reg_to_temp[reg] = arg; + } + oarg_end: + new_args[i] = reg; + } + + if (def->flags & TCG_OPF_BB_END) + tcg_reg_alloc_bb_end(s); + + /* emit instruction */ + tcg_out_op(s, opc, new_args, const_args); + + /* move the outputs in the correct register if needed */ + for(i = 0; i < nb_oargs; i++) { + ts = &s->temps[args[i]]; + reg = new_args[i]; + if (ts->fixed_reg && ts->reg != reg) { + tcg_out_mov(s, ts->reg, reg); + } + } +} + +static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def, + int opc, const TCGArg *args, + unsigned int dead_iargs) +{ + int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params; + TCGArg arg, func_arg; + TCGTemp *ts; + tcg_target_long stack_offset, call_stack_size; + int const_func_arg; + TCGRegSet allocated_regs; + const TCGArgConstraint *arg_ct; + + arg = *args++; + + nb_oargs = arg >> 16; + nb_iargs = arg & 0xffff; + nb_params = nb_iargs - 1; + + flags = args[nb_oargs + nb_iargs]; + + nb_regs = tcg_target_get_call_iarg_regs_count(flags); + if (nb_regs > nb_params) + nb_regs = nb_params; + + /* assign stack slots first */ + /* XXX: preallocate call stack */ + call_stack_size = (nb_params - nb_regs) * sizeof(tcg_target_long); + call_stack_size = (call_stack_size + TCG_TARGET_STACK_ALIGN - 1) & + ~(TCG_TARGET_STACK_ALIGN - 1); + tcg_out_addi(s, TCG_REG_CALL_STACK, -call_stack_size); + + stack_offset = 0; + for(i = nb_regs; i < nb_params; i++) { + arg = args[nb_oargs + i]; + ts = &s->temps[arg]; + if (ts->val_type == TEMP_VAL_REG) { + tcg_out_st(s, ts->reg, TCG_REG_CALL_STACK, stack_offset); + } else if (ts->val_type == TEMP_VAL_MEM) { + reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], + s->reserved_regs); + /* XXX: not correct if reading values from the stack */ + tcg_out_ld(s, reg, ts->mem_reg, ts->mem_offset); + tcg_out_st(s, reg, TCG_REG_CALL_STACK, stack_offset); + } else if (ts->val_type == TEMP_VAL_CONST) { + reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], + s->reserved_regs); + /* XXX: sign extend may be needed on some targets */ + tcg_out_movi(s, ts->type, reg, ts->val); + tcg_out_st(s, reg, TCG_REG_CALL_STACK, stack_offset); + } else { + tcg_abort(); + } + stack_offset += sizeof(tcg_target_long); + } + + /* assign input registers */ + tcg_regset_set(allocated_regs, s->reserved_regs); + for(i = 0; i < nb_regs; i++) { + arg = args[nb_oargs + i]; + ts = &s->temps[arg]; + reg = tcg_target_call_iarg_regs[i]; + tcg_reg_free(s, reg); + if (ts->val_type == TEMP_VAL_REG) { + if (ts->reg != reg) { + tcg_out_mov(s, reg, ts->reg); + } + } else if (ts->val_type == TEMP_VAL_MEM) { + tcg_out_ld(s, reg, ts->mem_reg, ts->mem_offset); + } else if (ts->val_type == TEMP_VAL_CONST) { + /* XXX: sign extend ? */ + tcg_out_movi(s, ts->type, reg, ts->val); + } else { + tcg_abort(); + } + tcg_regset_set_reg(allocated_regs, reg); + } + + /* assign function address */ + func_arg = args[nb_oargs + nb_iargs - 1]; + arg_ct = &def->args_ct[0]; + ts = &s->temps[func_arg]; + const_func_arg = 0; + if (ts->val_type == TEMP_VAL_MEM) { + reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); + tcg_out_ld(s, reg, ts->mem_reg, ts->mem_offset); + func_arg = reg; + } else if (ts->val_type == TEMP_VAL_REG) { + reg = ts->reg; + if (!tcg_regset_test_reg(arg_ct->u.regs, reg)) { + reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); + tcg_out_mov(s, reg, ts->reg); + } + func_arg = reg; + } else if (ts->val_type == TEMP_VAL_CONST) { + if (tcg_target_const_match(ts->val, arg_ct)) { + const_func_arg = 1; + func_arg = ts->val; + } else { + reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); + tcg_out_movi(s, ts->type, reg, ts->val); + func_arg = reg; + } + } else { + tcg_abort(); + } + + /* mark dead temporaries and free the associated registers */ + for(i = 0; i < nb_params; i++) { + arg = args[nb_oargs + i]; + if (IS_DEAD_IARG(i)) { + ts = &s->temps[arg]; + if (ts->val_type != TEMP_VAL_CONST && !ts->fixed_reg) { + if (ts->val_type == TEMP_VAL_REG) + s->reg_to_temp[ts->reg] = -1; + ts->val_type = TEMP_VAL_DEAD; + } + } + } + + /* clobber call registers */ + for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { + if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) { + tcg_reg_free(s, reg); + } + } + + /* store globals and free associated registers (we assume the call + can modify any global. */ + for(i = 0; i < s->nb_globals; i++) { + ts = &s->temps[i]; + if (!ts->fixed_reg) { + if (ts->val_type == TEMP_VAL_REG) { + tcg_reg_free(s, ts->reg); + } + } + } + + tcg_out_op(s, opc, &func_arg, &const_func_arg); + + tcg_out_addi(s, TCG_REG_CALL_STACK, call_stack_size); + + /* assign output registers and emit moves if needed */ + for(i = 0; i < nb_oargs; i++) { + arg = args[i]; + ts = &s->temps[arg]; + reg = tcg_target_call_oarg_regs[i]; + tcg_reg_free(s, reg); + if (ts->fixed_reg) { + if (ts->reg != reg) { + tcg_out_mov(s, ts->reg, reg); + } + } else { + if (ts->val_type == TEMP_VAL_REG) + s->reg_to_temp[ts->reg] = -1; + ts->val_type = TEMP_VAL_REG; + ts->reg = reg; + ts->mem_coherent = 0; + s->reg_to_temp[reg] = arg; + } + } + + return nb_iargs + nb_oargs + def->nb_cargs + 1; +} + +#ifdef CONFIG_PROFILER + +static int64_t dyngen_table_op_count[NB_OPS]; + +void dump_op_count(void) +{ + int i; + FILE *f; + f = fopen("/tmp/op1.log", "w"); + for(i = 0; i < INDEX_op_end; i++) { + fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, dyngen_table_op_count[i]); + } + fclose(f); + f = fopen("/tmp/op2.log", "w"); + for(i = INDEX_op_end; i < NB_OPS; i++) { + fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, dyngen_table_op_count[i]); + } + fclose(f); +} +#endif + + +static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, + int do_search_pc, + const uint8_t *searched_pc) +{ + int opc, op_index, macro_op_index; + const TCGOpDef *def; + unsigned int dead_iargs; + const TCGArg *args; + +#ifdef DEBUG_DISAS + if (unlikely(loglevel & CPU_LOG_TB_OP)) { + fprintf(logfile, "OP:\n"); + tcg_dump_ops(s, logfile); + fprintf(logfile, "\n"); + } +#endif + + tcg_liveness_analysis(s); + +#ifdef DEBUG_DISAS + if (unlikely(loglevel & CPU_LOG_TB_OP_OPT)) { + fprintf(logfile, "OP after la:\n"); + tcg_dump_ops(s, logfile); + fprintf(logfile, "\n"); + } +#endif + + tcg_reg_alloc_start(s); + + s->code_buf = gen_code_buf; + s->code_ptr = gen_code_buf; + + macro_op_index = -1; + args = gen_opparam_buf; + op_index = 0; + for(;;) { + opc = gen_opc_buf[op_index]; +#ifdef CONFIG_PROFILER + dyngen_table_op_count[opc]++; +#endif + def = &tcg_op_defs[opc]; +#if 0 + printf("%s: %d %d %d\n", def->name, + def->nb_oargs, def->nb_iargs, def->nb_cargs); + // dump_regs(s); +#endif + switch(opc) { + case INDEX_op_mov_i32: +#if TCG_TARGET_REG_BITS == 64 + case INDEX_op_mov_i64: +#endif + dead_iargs = s->op_dead_iargs[op_index]; + tcg_reg_alloc_mov(s, def, args, dead_iargs); + break; + case INDEX_op_nop: + case INDEX_op_nop1: + case INDEX_op_nop2: + case INDEX_op_nop3: + break; + case INDEX_op_nopn: + args += args[0]; + goto next; + case INDEX_op_macro_goto: + macro_op_index = op_index; /* only used for exceptions */ + op_index = args[0] - 1; + args = gen_opparam_buf + args[1]; + goto next; + case INDEX_op_macro_end: + macro_op_index = -1; /* only used for exceptions */ + op_index = args[0] - 1; + args = gen_opparam_buf + args[1]; + goto next; + case INDEX_op_macro_start: + /* must never happen here */ + tcg_abort(); + case INDEX_op_set_label: + tcg_reg_alloc_bb_end(s); + tcg_out_label(s, args[0], (long)s->code_ptr); + break; + case INDEX_op_call: + dead_iargs = s->op_dead_iargs[op_index]; + args += tcg_reg_alloc_call(s, def, opc, args, dead_iargs); + goto next; + case INDEX_op_end: + goto the_end; + case 0 ... INDEX_op_end - 1: + /* legacy dyngen ops */ +#ifdef CONFIG_PROFILER + { + extern int64_t dyngen_old_op_count; + dyngen_old_op_count++; + } +#endif + tcg_reg_alloc_bb_end(s); + if (do_search_pc) { + s->code_ptr += def->copy_size; + args += def->nb_args; + } else { + args = dyngen_op(s, opc, args); + } + goto next; + default: + /* Note: in order to speed up the code, it would be much + faster to have specialized register allocator functions for + some common argument patterns */ + dead_iargs = s->op_dead_iargs[op_index]; + tcg_reg_alloc_op(s, def, opc, args, dead_iargs); + break; + } + args += def->nb_args; + next: ; + if (do_search_pc) { + if (searched_pc < s->code_ptr) { + if (macro_op_index >= 0) + return macro_op_index; + else + return op_index; + } + } + op_index++; +#ifndef NDEBUG + check_regs(s); +#endif + } + the_end: + return -1; +} + +int dyngen_code(TCGContext *s, uint8_t *gen_code_buf) +{ +#ifdef CONFIG_PROFILER + { + extern int64_t dyngen_op_count; + extern int dyngen_op_count_max; + int n; + n = (gen_opc_ptr - gen_opc_buf); + dyngen_op_count += n; + if (n > dyngen_op_count_max) + dyngen_op_count_max = n; + } +#endif + + tcg_gen_code_common(s, gen_code_buf, 0, NULL); + + /* flush instruction cache */ + flush_icache_range((unsigned long)gen_code_buf, + (unsigned long)s->code_ptr); + return s->code_ptr - gen_code_buf; +} + +/* return the index of the micro operation such as the pc after is < + search_pc. Note: gen_code_buf is accessed during the operation, but + its content should not be modified. Return -1 if not found. */ +int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, + const uint8_t *searched_pc) +{ + return tcg_gen_code_common(s, gen_code_buf, 1, searched_pc); +} |