TCG code generator
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3943 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/tcg/tcg.c b/tcg/tcg.c
new file mode 100644
index 0000000..211e7fc
--- /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);
+}
