mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
f6996f99f3
qemu/tcg/tci/tcg-target.c.inc
Richard Henderson 53f405569c tcg/tci: Move stack bounds check to compile-time 
The existing check was incomplete:
(1) Only applied to two of the 7 stores, and not to the loads at all.
(2) Only checked the upper, but not the lower bound of the stack.

Doing this at compile time means that we don't need to do it
at runtime as well.

Tested-by: Alex Bennée <alex.bennee@linaro.org>
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

798 lines
24 KiB
C++
Raw Blame History

/*
* 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:
return C_O1_I2(r, r, r);
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:
/* TODO: Does R, RI, RI result in faster code than R, R, RI? */
return C_O1_I2(r, ri, ri);
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, ri);
case INDEX_op_setcond_i32:
case INDEX_op_setcond_i64:
return C_O1_I2(r, r, ri);
#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, ri, ri);
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, ri, ri);
#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,
#if 0 /* used for TCG_REG_CALL_STACK */
TCG_REG_R4,
#endif
TCG_REG_R5,
TCG_REG_R6,
TCG_REG_R7,
#if TCG_TARGET_NB_REGS >= 16
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
TCG_REG_R11,
TCG_REG_R12,
TCG_REG_R13,
TCG_REG_R14,
TCG_REG_R15,
#endif
};
#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,
#if 0 /* used for TCG_REG_CALL_STACK */
TCG_REG_R4,
#endif
TCG_REG_R5,
TCG_REG_R6,
#if TCG_TARGET_REG_BITS == 32
/* 32 bit hosts need 2 * MAX_OPC_PARAM_IARGS registers. */
TCG_REG_R7,
#if TCG_TARGET_NB_REGS >= 16
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
TCG_REG_R11,
TCG_REG_R12,
#else
# error Too few input registers available
#endif
#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",
#if TCG_TARGET_NB_REGS >= 16
"r08",
"r09",
"r10",
"r11",
"r12",
"r13",
"r14",
"r15",
#if TCG_TARGET_NB_REGS >= 32
"r16",
"r17",
"r18",
"r19",
"r20",
"r21",
"r22",
"r23",
"r24",
"r25",
"r26",
"r27",
"r28",
"r29",
"r30",
"r31"
#endif
#endif
};
#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 register or constant (native size). */
static void tcg_out_ri(TCGContext *s, int const_arg, TCGArg arg)
{
if (const_arg) {
tcg_debug_assert(const_arg == 1);
tcg_out8(s, TCG_CONST);
tcg_out_i(s, arg);
} else {
tcg_out_r(s, arg);
}
}
/* Write register or constant (32 bit). */
static void tcg_out_ri32(TCGContext *s, int const_arg, TCGArg arg)
{
if (const_arg) {
tcg_debug_assert(const_arg == 1);
tcg_out8(s, TCG_CONST);
tcg_out32(s, arg);
} else {
tcg_out_r(s, arg);
}
}
#if TCG_TARGET_REG_BITS == 64
/* Write register or constant (64 bit). */
static void tcg_out_ri64(TCGContext *s, int const_arg, TCGArg arg)
{
if (const_arg) {
tcg_debug_assert(const_arg == 1);
tcg_out8(s, TCG_CONST);
tcg_out64(s, arg);
} else {
tcg_out_r(s, arg);
}
}
#endif
/* 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_ri(s, 1, (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_ri32(s, const_args[2], 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_ri32(s, const_args[3], args[3]);
tcg_out_ri32(s, const_args[4], 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_ri64(s, const_args[2], 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_ri32(s, const_args[1], args[1]);
tcg_out_ri32(s, const_args[2], 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). */
tcg_out_r(s, args[0]);
tcg_out_ri64(s, const_args[1], args[1]);
tcg_out_ri64(s, const_args[2], 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_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). */
TODO();
break;
case INDEX_op_div2_i64: /* Optional (TCG_TARGET_HAS_div2_i64). */
case INDEX_op_divu2_i64: /* Optional (TCG_TARGET_HAS_div2_i64). */
TODO();
break;
case INDEX_op_brcond_i64:
tcg_out_r(s, args[0]);
tcg_out_ri64(s, const_args[1], 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_ri32(s, const_args[1], args[1]);
tcg_out_ri32(s, const_args[2], args[2]);
break;
case INDEX_op_div2_i32: /* Optional (TCG_TARGET_HAS_div2_i32). */
case INDEX_op_divu2_i32: /* Optional (TCG_TARGET_HAS_div2_i32). */
TODO();
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_ri32(s, const_args[2], args[2]);
tcg_out_ri32(s, const_args[3], 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_ri32(s, const_args[1], 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)
{
}
Reference in New Issue View Git Blame Copy Permalink