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qemu/tcg/tci/tcg-target.c.inc
Richard Henderson 2f74f45e32 tcg/tci: Remove TCG_CONST 
Restrict all operands to registers.  All constants will be forced
into registers by the middle-end.  Removing the difference in how
immediate integers were encoded will allow more code to be shared
between 32-bit and 64-bit operations.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05 10:24:14 -10:00

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/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2009, 2011 Stefan Weil
*
* 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.
*/
/* TODO list:
* - See TODO comments in code.
*/
/* Marker for missing code. */
#define TODO() \
do { \
fprintf(stderr, "TODO %s:%u: %s()\n", \
__FILE__, __LINE__, __func__); \
tcg_abort(); \
} while (0)
/* Bitfield n...m (in 32 bit value). */
#define BITS(n, m) (((0xffffffffU << (31 - n)) >> (31 - n + m)) << m)
static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
{
switch (op) {
case INDEX_op_ld8u_i32:
case INDEX_op_ld8s_i32:
case INDEX_op_ld16u_i32:
case INDEX_op_ld16s_i32:
case INDEX_op_ld_i32:
case INDEX_op_ld8u_i64:
case INDEX_op_ld8s_i64:
case INDEX_op_ld16u_i64:
case INDEX_op_ld16s_i64:
case INDEX_op_ld32u_i64:
case INDEX_op_ld32s_i64:
case INDEX_op_ld_i64:
case INDEX_op_not_i32:
case INDEX_op_not_i64:
case INDEX_op_neg_i32:
case INDEX_op_neg_i64:
case INDEX_op_ext8s_i32:
case INDEX_op_ext8s_i64:
case INDEX_op_ext16s_i32:
case INDEX_op_ext16s_i64:
case INDEX_op_ext8u_i32:
case INDEX_op_ext8u_i64:
case INDEX_op_ext16u_i32:
case INDEX_op_ext16u_i64:
case INDEX_op_ext32s_i64:
case INDEX_op_ext32u_i64:
case INDEX_op_ext_i32_i64:
case INDEX_op_extu_i32_i64:
case INDEX_op_bswap16_i32:
case INDEX_op_bswap16_i64:
case INDEX_op_bswap32_i32:
case INDEX_op_bswap32_i64:
case INDEX_op_bswap64_i64:
return C_O1_I1(r, r);
case INDEX_op_st8_i32:
case INDEX_op_st16_i32:
case INDEX_op_st_i32:
case INDEX_op_st8_i64:
case INDEX_op_st16_i64:
case INDEX_op_st32_i64:
case INDEX_op_st_i64:
return C_O0_I2(r, r);
case INDEX_op_div_i32:
case INDEX_op_div_i64:
case INDEX_op_divu_i32:
case INDEX_op_divu_i64:
case INDEX_op_rem_i32:
case INDEX_op_rem_i64:
case INDEX_op_remu_i32:
case INDEX_op_remu_i64:
case INDEX_op_add_i32:
case INDEX_op_add_i64:
case INDEX_op_sub_i32:
case INDEX_op_sub_i64:
case INDEX_op_mul_i32:
case INDEX_op_mul_i64:
case INDEX_op_and_i32:
case INDEX_op_and_i64:
case INDEX_op_andc_i32:
case INDEX_op_andc_i64:
case INDEX_op_eqv_i32:
case INDEX_op_eqv_i64:
case INDEX_op_nand_i32:
case INDEX_op_nand_i64:
case INDEX_op_nor_i32:
case INDEX_op_nor_i64:
case INDEX_op_or_i32:
case INDEX_op_or_i64:
case INDEX_op_orc_i32:
case INDEX_op_orc_i64:
case INDEX_op_xor_i32:
case INDEX_op_xor_i64:
case INDEX_op_shl_i32:
case INDEX_op_shl_i64:
case INDEX_op_shr_i32:
case INDEX_op_shr_i64:
case INDEX_op_sar_i32:
case INDEX_op_sar_i64:
case INDEX_op_rotl_i32:
case INDEX_op_rotl_i64:
case INDEX_op_rotr_i32:
case INDEX_op_rotr_i64:
case INDEX_op_setcond_i32:
case INDEX_op_setcond_i64:
return C_O1_I2(r, r, r);
case INDEX_op_deposit_i32:
case INDEX_op_deposit_i64:
return C_O1_I2(r, 0, r);
case INDEX_op_brcond_i32:
case INDEX_op_brcond_i64:
return C_O0_I2(r, r);
#if TCG_TARGET_REG_BITS == 32
/* TODO: Support R, R, R, R, RI, RI? Will it be faster? */
case INDEX_op_add2_i32:
case INDEX_op_sub2_i32:
return C_O2_I4(r, r, r, r, r, r);
case INDEX_op_brcond2_i32:
return C_O0_I4(r, r, r, r);
case INDEX_op_mulu2_i32:
return C_O2_I2(r, r, r, r);
case INDEX_op_setcond2_i32:
return C_O1_I4(r, r, r, r, r);
#endif
case INDEX_op_qemu_ld_i32:
return (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
? C_O1_I1(r, r)
: C_O1_I2(r, r, r));
case INDEX_op_qemu_ld_i64:
return (TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, r)
: TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? C_O2_I1(r, r, r)
: C_O2_I2(r, r, r, r));
case INDEX_op_qemu_st_i32:
return (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
? C_O0_I2(r, r)
: C_O0_I3(r, r, r));
case INDEX_op_qemu_st_i64:
return (TCG_TARGET_REG_BITS == 64 ? C_O0_I2(r, r)
: TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? C_O0_I3(r, r, r)
: C_O0_I4(r, r, r, r));
default:
g_assert_not_reached();
}
}
static const int tcg_target_reg_alloc_order[] = {
TCG_REG_R0,
TCG_REG_R1,
TCG_REG_R2,
TCG_REG_R3,
TCG_REG_R4,
TCG_REG_R5,
TCG_REG_R6,
TCG_REG_R7,
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
TCG_REG_R11,
TCG_REG_R12,
TCG_REG_R13,
TCG_REG_R14,
TCG_REG_R15,
};
#if MAX_OPC_PARAM_IARGS != 6
# error Fix needed, number of supported input arguments changed!
#endif
static const int tcg_target_call_iarg_regs[] = {
TCG_REG_R0,
TCG_REG_R1,
TCG_REG_R2,
TCG_REG_R3,
TCG_REG_R4,
TCG_REG_R5,
#if TCG_TARGET_REG_BITS == 32
/* 32 bit hosts need 2 * MAX_OPC_PARAM_IARGS registers. */
TCG_REG_R6,
TCG_REG_R7,
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
TCG_REG_R11,
#endif
};
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_R0,
#if TCG_TARGET_REG_BITS == 32
TCG_REG_R1
#endif
};
#ifdef CONFIG_DEBUG_TCG
static const char *const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
"r00",
"r01",
"r02",
"r03",
"r04",
"r05",
"r06",
"r07",
"r08",
"r09",
"r10",
"r11",
"r12",
"r13",
"r14",
"r15",
};
#endif
static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
intptr_t value, intptr_t addend)
{
/* tcg_out_reloc always uses the same type, addend. */
tcg_debug_assert(type == sizeof(tcg_target_long));
tcg_debug_assert(addend == 0);
tcg_debug_assert(value != 0);
if (TCG_TARGET_REG_BITS == 32) {
tcg_patch32(code_ptr, value);
} else {
tcg_patch64(code_ptr, value);
}
return true;
}
#if defined(CONFIG_DEBUG_TCG_INTERPRETER)
/* Show current bytecode. Used by tcg interpreter. */
void tci_disas(uint8_t opc)
{
const TCGOpDef *def = &tcg_op_defs[opc];
fprintf(stderr, "TCG %s %u, %u, %u\n",
def->name, def->nb_oargs, def->nb_iargs, def->nb_cargs);
}
#endif
/* Write value (native size). */
static void tcg_out_i(TCGContext *s, tcg_target_ulong v)
{
if (TCG_TARGET_REG_BITS == 32) {
tcg_out32(s, v);
} else {
tcg_out64(s, v);
}
}
/* Write opcode. */
static void tcg_out_op_t(TCGContext *s, TCGOpcode op)
{
tcg_out8(s, op);
tcg_out8(s, 0);
}
/* Write register. */
static void tcg_out_r(TCGContext *s, TCGArg t0)
{
tcg_debug_assert(t0 < TCG_TARGET_NB_REGS);
tcg_out8(s, t0);
}
/* Write label. */
static void tci_out_label(TCGContext *s, TCGLabel *label)
{
if (label->has_value) {
tcg_out_i(s, label->u.value);
tcg_debug_assert(label->u.value);
} else {
tcg_out_reloc(s, s->code_ptr, sizeof(tcg_target_ulong), label, 0);
s->code_ptr += sizeof(tcg_target_ulong);
}
}
static void stack_bounds_check(TCGReg base, target_long offset)
{
if (base == TCG_REG_CALL_STACK) {
tcg_debug_assert(offset < 0);
tcg_debug_assert(offset >= -(CPU_TEMP_BUF_NLONGS * sizeof(long)));
}
}
static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg1,
intptr_t arg2)
{
uint8_t *old_code_ptr = s->code_ptr;
stack_bounds_check(arg1, arg2);
if (type == TCG_TYPE_I32) {
tcg_out_op_t(s, INDEX_op_ld_i32);
tcg_out_r(s, ret);
tcg_out_r(s, arg1);
tcg_out32(s, arg2);
} else {
tcg_debug_assert(type == TCG_TYPE_I64);
#if TCG_TARGET_REG_BITS == 64
tcg_out_op_t(s, INDEX_op_ld_i64);
tcg_out_r(s, ret);
tcg_out_r(s, arg1);
tcg_debug_assert(arg2 == (int32_t)arg2);
tcg_out32(s, arg2);
#else
TODO();
#endif
}
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
{
uint8_t *old_code_ptr = s->code_ptr;
tcg_debug_assert(ret != arg);
#if TCG_TARGET_REG_BITS == 32
tcg_out_op_t(s, INDEX_op_mov_i32);
#else
tcg_out_op_t(s, INDEX_op_mov_i64);
#endif
tcg_out_r(s, ret);
tcg_out_r(s, arg);
old_code_ptr[1] = s->code_ptr - old_code_ptr;
return true;
}
static void tcg_out_movi(TCGContext *s, TCGType type,
TCGReg t0, tcg_target_long arg)
{
uint8_t *old_code_ptr = s->code_ptr;
uint32_t arg32 = arg;
if (type == TCG_TYPE_I32 || arg == arg32) {
tcg_out_op_t(s, INDEX_op_tci_movi_i32);
tcg_out_r(s, t0);
tcg_out32(s, arg32);
} else {
tcg_debug_assert(type == TCG_TYPE_I64);
#if TCG_TARGET_REG_BITS == 64
tcg_out_op_t(s, INDEX_op_tci_movi_i64);
tcg_out_r(s, t0);
tcg_out64(s, arg);
#else
TODO();
#endif
}
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static inline void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg)
{
uint8_t *old_code_ptr = s->code_ptr;
tcg_out_op_t(s, INDEX_op_call);
tcg_out_i(s, (uintptr_t)arg);
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
const int *const_args)
{
uint8_t *old_code_ptr = s->code_ptr;
tcg_out_op_t(s, opc);
switch (opc) {
case INDEX_op_exit_tb:
tcg_out64(s, args[0]);
break;
case INDEX_op_goto_tb:
if (s->tb_jmp_insn_offset) {
/* Direct jump method. */
/* Align for atomic patching and thread safety */
s->code_ptr = QEMU_ALIGN_PTR_UP(s->code_ptr, 4);
s->tb_jmp_insn_offset[args[0]] = tcg_current_code_size(s);
tcg_out32(s, 0);
} else {
/* Indirect jump method. */
TODO();
}
set_jmp_reset_offset(s, args[0]);
break;
case INDEX_op_br:
tci_out_label(s, arg_label(args[0]));
break;
case INDEX_op_setcond_i32:
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
tcg_out8(s, args[3]); /* condition */
break;
#if TCG_TARGET_REG_BITS == 32
case INDEX_op_setcond2_i32:
/* setcond2_i32 cond, t0, t1_low, t1_high, t2_low, t2_high */
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
tcg_out_r(s, args[3]);
tcg_out_r(s, args[4]);
tcg_out8(s, args[5]); /* condition */
break;
#elif TCG_TARGET_REG_BITS == 64
case INDEX_op_setcond_i64:
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
tcg_out8(s, args[3]); /* condition */
break;
#endif
case INDEX_op_ld8u_i32:
case INDEX_op_ld8s_i32:
case INDEX_op_ld16u_i32:
case INDEX_op_ld16s_i32:
case INDEX_op_ld_i32:
case INDEX_op_st8_i32:
case INDEX_op_st16_i32:
case INDEX_op_st_i32:
case INDEX_op_ld8u_i64:
case INDEX_op_ld8s_i64:
case INDEX_op_ld16u_i64:
case INDEX_op_ld16s_i64:
case INDEX_op_ld32u_i64:
case INDEX_op_ld32s_i64:
case INDEX_op_ld_i64:
case INDEX_op_st8_i64:
case INDEX_op_st16_i64:
case INDEX_op_st32_i64:
case INDEX_op_st_i64:
stack_bounds_check(args[1], args[2]);
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_debug_assert(args[2] == (int32_t)args[2]);
tcg_out32(s, args[2]);
break;
case INDEX_op_add_i32:
case INDEX_op_sub_i32:
case INDEX_op_mul_i32:
case INDEX_op_and_i32:
case INDEX_op_andc_i32: /* Optional (TCG_TARGET_HAS_andc_i32). */
case INDEX_op_eqv_i32: /* Optional (TCG_TARGET_HAS_eqv_i32). */
case INDEX_op_nand_i32: /* Optional (TCG_TARGET_HAS_nand_i32). */
case INDEX_op_nor_i32: /* Optional (TCG_TARGET_HAS_nor_i32). */
case INDEX_op_or_i32:
case INDEX_op_orc_i32: /* Optional (TCG_TARGET_HAS_orc_i32). */
case INDEX_op_xor_i32:
case INDEX_op_shl_i32:
case INDEX_op_shr_i32:
case INDEX_op_sar_i32:
case INDEX_op_rotl_i32: /* Optional (TCG_TARGET_HAS_rot_i32). */
case INDEX_op_rotr_i32: /* Optional (TCG_TARGET_HAS_rot_i32). */
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
break;
case INDEX_op_deposit_i32: /* Optional (TCG_TARGET_HAS_deposit_i32). */
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
tcg_debug_assert(args[3] <= UINT8_MAX);
tcg_out8(s, args[3]);
tcg_debug_assert(args[4] <= UINT8_MAX);
tcg_out8(s, args[4]);
break;
#if TCG_TARGET_REG_BITS == 64
case INDEX_op_add_i64:
case INDEX_op_sub_i64:
case INDEX_op_mul_i64:
case INDEX_op_and_i64:
case INDEX_op_andc_i64: /* Optional (TCG_TARGET_HAS_andc_i64). */
case INDEX_op_eqv_i64: /* Optional (TCG_TARGET_HAS_eqv_i64). */
case INDEX_op_nand_i64: /* Optional (TCG_TARGET_HAS_nand_i64). */
case INDEX_op_nor_i64: /* Optional (TCG_TARGET_HAS_nor_i64). */
case INDEX_op_or_i64:
case INDEX_op_orc_i64: /* Optional (TCG_TARGET_HAS_orc_i64). */
case INDEX_op_xor_i64:
case INDEX_op_shl_i64:
case INDEX_op_shr_i64:
case INDEX_op_sar_i64:
case INDEX_op_rotl_i64: /* Optional (TCG_TARGET_HAS_rot_i64). */
case INDEX_op_rotr_i64: /* Optional (TCG_TARGET_HAS_rot_i64). */
case INDEX_op_div_i64: /* Optional (TCG_TARGET_HAS_div_i64). */
case INDEX_op_divu_i64: /* Optional (TCG_TARGET_HAS_div_i64). */
case INDEX_op_rem_i64: /* Optional (TCG_TARGET_HAS_div_i64). */
case INDEX_op_remu_i64: /* Optional (TCG_TARGET_HAS_div_i64). */
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
break;
case INDEX_op_deposit_i64: /* Optional (TCG_TARGET_HAS_deposit_i64). */
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
tcg_debug_assert(args[3] <= UINT8_MAX);
tcg_out8(s, args[3]);
tcg_debug_assert(args[4] <= UINT8_MAX);
tcg_out8(s, args[4]);
break;
case INDEX_op_brcond_i64:
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out8(s, args[2]); /* condition */
tci_out_label(s, arg_label(args[3]));
break;
case INDEX_op_bswap16_i64: /* Optional (TCG_TARGET_HAS_bswap16_i64). */
case INDEX_op_bswap32_i64: /* Optional (TCG_TARGET_HAS_bswap32_i64). */
case INDEX_op_bswap64_i64: /* Optional (TCG_TARGET_HAS_bswap64_i64). */
case INDEX_op_not_i64: /* Optional (TCG_TARGET_HAS_not_i64). */
case INDEX_op_neg_i64: /* Optional (TCG_TARGET_HAS_neg_i64). */
case INDEX_op_ext8s_i64: /* Optional (TCG_TARGET_HAS_ext8s_i64). */
case INDEX_op_ext8u_i64: /* Optional (TCG_TARGET_HAS_ext8u_i64). */
case INDEX_op_ext16s_i64: /* Optional (TCG_TARGET_HAS_ext16s_i64). */
case INDEX_op_ext16u_i64: /* Optional (TCG_TARGET_HAS_ext16u_i64). */
case INDEX_op_ext32s_i64: /* Optional (TCG_TARGET_HAS_ext32s_i64). */
case INDEX_op_ext32u_i64: /* Optional (TCG_TARGET_HAS_ext32u_i64). */
case INDEX_op_ext_i32_i64:
case INDEX_op_extu_i32_i64:
#endif /* TCG_TARGET_REG_BITS == 64 */
case INDEX_op_neg_i32: /* Optional (TCG_TARGET_HAS_neg_i32). */
case INDEX_op_not_i32: /* Optional (TCG_TARGET_HAS_not_i32). */
case INDEX_op_ext8s_i32: /* Optional (TCG_TARGET_HAS_ext8s_i32). */
case INDEX_op_ext16s_i32: /* Optional (TCG_TARGET_HAS_ext16s_i32). */
case INDEX_op_ext8u_i32: /* Optional (TCG_TARGET_HAS_ext8u_i32). */
case INDEX_op_ext16u_i32: /* Optional (TCG_TARGET_HAS_ext16u_i32). */
case INDEX_op_bswap16_i32: /* Optional (TCG_TARGET_HAS_bswap16_i32). */
case INDEX_op_bswap32_i32: /* Optional (TCG_TARGET_HAS_bswap32_i32). */
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
break;
case INDEX_op_div_i32: /* Optional (TCG_TARGET_HAS_div_i32). */
case INDEX_op_divu_i32: /* Optional (TCG_TARGET_HAS_div_i32). */
case INDEX_op_rem_i32: /* Optional (TCG_TARGET_HAS_div_i32). */
case INDEX_op_remu_i32: /* Optional (TCG_TARGET_HAS_div_i32). */
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
break;
#if TCG_TARGET_REG_BITS == 32
case INDEX_op_add2_i32:
case INDEX_op_sub2_i32:
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
tcg_out_r(s, args[3]);
tcg_out_r(s, args[4]);
tcg_out_r(s, args[5]);
break;
case INDEX_op_brcond2_i32:
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
tcg_out_r(s, args[3]);
tcg_out8(s, args[4]); /* condition */
tci_out_label(s, arg_label(args[5]));
break;
case INDEX_op_mulu2_i32:
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out_r(s, args[2]);
tcg_out_r(s, args[3]);
break;
#endif
case INDEX_op_brcond_i32:
tcg_out_r(s, args[0]);
tcg_out_r(s, args[1]);
tcg_out8(s, args[2]); /* condition */
tci_out_label(s, arg_label(args[3]));
break;
case INDEX_op_qemu_ld_i32:
tcg_out_r(s, *args++);
tcg_out_r(s, *args++);
if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {
tcg_out_r(s, *args++);
}
tcg_out_i(s, *args++);
break;
case INDEX_op_qemu_ld_i64:
tcg_out_r(s, *args++);
if (TCG_TARGET_REG_BITS == 32) {
tcg_out_r(s, *args++);
}
tcg_out_r(s, *args++);
if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {
tcg_out_r(s, *args++);
}
tcg_out_i(s, *args++);
break;
case INDEX_op_qemu_st_i32:
tcg_out_r(s, *args++);
tcg_out_r(s, *args++);
if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {
tcg_out_r(s, *args++);
}
tcg_out_i(s, *args++);
break;
case INDEX_op_qemu_st_i64:
tcg_out_r(s, *args++);
if (TCG_TARGET_REG_BITS == 32) {
tcg_out_r(s, *args++);
}
tcg_out_r(s, *args++);
if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {
tcg_out_r(s, *args++);
}
tcg_out_i(s, *args++);
break;
case INDEX_op_mb:
break;
case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
case INDEX_op_mov_i64:
case INDEX_op_call: /* Always emitted via tcg_out_call. */
default:
tcg_abort();
}
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1,
intptr_t arg2)
{
uint8_t *old_code_ptr = s->code_ptr;
stack_bounds_check(arg1, arg2);
if (type == TCG_TYPE_I32) {
tcg_out_op_t(s, INDEX_op_st_i32);
tcg_out_r(s, arg);
tcg_out_r(s, arg1);
tcg_out32(s, arg2);
} else {
tcg_debug_assert(type == TCG_TYPE_I64);
#if TCG_TARGET_REG_BITS == 64
tcg_out_op_t(s, INDEX_op_st_i64);
tcg_out_r(s, arg);
tcg_out_r(s, arg1);
tcg_out32(s, arg2);
#else
TODO();
#endif
}
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static inline bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
TCGReg base, intptr_t ofs)
{
return false;
}
/* Test if a constant matches the constraint. */
static int tcg_target_const_match(tcg_target_long val, TCGType type,
const TCGArgConstraint *arg_ct)
{
/* No need to return 0 or 1, 0 or != 0 is good enough. */
return arg_ct->ct & TCG_CT_CONST;
}
static void tcg_target_init(TCGContext *s)
{
#if defined(CONFIG_DEBUG_TCG_INTERPRETER)
const char *envval = getenv("DEBUG_TCG");
if (envval) {
qemu_set_log(strtol(envval, NULL, 0));
}
#endif
/* The current code uses uint8_t for tcg operations. */
tcg_debug_assert(tcg_op_defs_max <= UINT8_MAX);
/* Registers available for 32 bit operations. */
tcg_target_available_regs[TCG_TYPE_I32] = BIT(TCG_TARGET_NB_REGS) - 1;
/* Registers available for 64 bit operations. */
tcg_target_available_regs[TCG_TYPE_I64] = BIT(TCG_TARGET_NB_REGS) - 1;
/* TODO: Which registers should be set here? */
tcg_target_call_clobber_regs = BIT(TCG_TARGET_NB_REGS) - 1;
s->reserved_regs = 0;
tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
/* We use negative offsets from "sp" so that we can distinguish
stores that might pretend to be call arguments. */
tcg_set_frame(s, TCG_REG_CALL_STACK,
-CPU_TEMP_BUF_NLONGS * sizeof(long),
CPU_TEMP_BUF_NLONGS * sizeof(long));
}
/* Generate global QEMU prologue and epilogue code. */
static inline void tcg_target_qemu_prologue(TCGContext *s)
{
}
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