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qemu-e2k/tcg/mips/tcg-target.c
Aurelien Jarno afa05235a5 tcg: initial mips support 
Based on a patch from Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>

A few words about design choices:
* Two registers, at and t0, are reserved for TCG internal use. They are
  useful for bswap and 64-bit ops.
* Most ops supports a constant argument with value 0, which is actually
  mapped to the zero register.
* While the at register is available for constant loading, ops only
  support a limited range of constants. TCG does a better job doing the
  register allocation and constant loading by itself. There are plenty of
  registers available anyway.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-12-01 00:06:15 +00:00

1343 lines
40 KiB
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/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2008-2009 Arnaud Patard <arnaud.patard@rtp-net.org>
* Copyright (c) 2009 Aurelien Jarno <aurelien@aurel32.net>
* Based on i386/tcg-target.c - 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.
*/
#if defined(TCG_TARGET_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN)
# define TCG_NEED_BSWAP 0
#else
# define TCG_NEED_BSWAP 1
#endif
#ifndef NDEBUG
static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
"zero",
"at",
"v0",
"v1",
"a0",
"a1",
"a2",
"a3",
"t0",
"t1",
"t2",
"t3",
"t4",
"t5",
"t6",
"t7",
"s0",
"s1",
"s2",
"s3",
"s4",
"s5",
"s6",
"s7",
"t8",
"t9",
"k0",
"k1",
"gp",
"sp",
"fp",
"ra",
};
#endif
/* check if we really need so many registers :P */
static const int tcg_target_reg_alloc_order[] = {
TCG_REG_S0,
TCG_REG_S1,
TCG_REG_S2,
TCG_REG_S3,
TCG_REG_S4,
TCG_REG_S5,
TCG_REG_S6,
TCG_REG_S7,
TCG_REG_T1,
TCG_REG_T2,
TCG_REG_T3,
TCG_REG_T4,
TCG_REG_T5,
TCG_REG_T6,
TCG_REG_T7,
TCG_REG_T8,
TCG_REG_T9,
TCG_REG_A0,
TCG_REG_A1,
TCG_REG_A2,
TCG_REG_A3,
TCG_REG_V0,
TCG_REG_V1
};
static const int tcg_target_call_iarg_regs[4] = {
TCG_REG_A0,
TCG_REG_A1,
TCG_REG_A2,
TCG_REG_A3
};
static const int tcg_target_call_oarg_regs[2] = {
TCG_REG_V0,
TCG_REG_V1
};
static uint8_t *tb_ret_addr;
static inline uint32_t reloc_lo16_val (void *pc, tcg_target_long target)
{
return target & 0xffff;
}
static inline void reloc_lo16 (void *pc, tcg_target_long target)
{
*(uint32_t *) pc = (*(uint32_t *) pc & ~0xffff)
| reloc_lo16_val(pc, target);
}
static inline uint32_t reloc_hi16_val (void *pc, tcg_target_long target)
{
return (target >> 16) & 0xffff;
}
static inline void reloc_hi16 (void *pc, tcg_target_long target)
{
*(uint32_t *) pc = (*(uint32_t *) pc & ~0xffff)
| reloc_hi16_val(pc, target);
}
static inline uint32_t reloc_pc16_val (void *pc, tcg_target_long target)
{
int32_t disp;
disp = target - (tcg_target_long) pc - 4;
if (disp != (disp << 14) >> 14) {
tcg_abort ();
}
return (disp >> 2) & 0xffff;
}
static inline void reloc_pc16 (void *pc, tcg_target_long target)
{
*(uint32_t *) pc = (*(uint32_t *) pc & ~0xffff)
| reloc_pc16_val(pc, target);
}
static inline uint32_t reloc_26_val (void *pc, tcg_target_long target)
{
if ((((tcg_target_long)pc + 4) & 0xf0000000) != (target & 0xf0000000)) {
tcg_abort ();
}
return (target >> 2) & 0x3ffffff;
}
static inline void reloc_pc26 (void *pc, tcg_target_long target)
{
*(uint32_t *) pc = (*(uint32_t *) pc & ~0x3ffffff)
| reloc_26_val(pc, target);
}
static void patch_reloc(uint8_t *code_ptr, int type,
tcg_target_long value, tcg_target_long addend)
{
value += addend;
switch(type) {
case R_MIPS_LO16:
reloc_lo16(code_ptr, value);
break;
case R_MIPS_HI16:
reloc_hi16(code_ptr, value);
break;
case R_MIPS_PC16:
reloc_pc16(code_ptr, value);
break;
case R_MIPS_26:
reloc_pc26(code_ptr, value);
break;
default:
tcg_abort();
}
}
/* maximum number of register used for input function arguments */
static inline int tcg_target_get_call_iarg_regs_count(int flags)
{
return 4;
}
/* parse target specific constraints */
static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
{
const char *ct_str;
ct_str = *pct_str;
switch(ct_str[0]) {
case 'r':
ct->ct |= TCG_CT_REG;
tcg_regset_set(ct->u.regs, 0xffffffff);
break;
case 'C':
ct->ct |= TCG_CT_REG;
tcg_regset_clear(ct->u.regs);
tcg_regset_set_reg(ct->u.regs, TCG_REG_T9);
break;
case 'L': /* qemu_ld output arg constraint */
ct->ct |= TCG_CT_REG;
tcg_regset_set(ct->u.regs, 0xffffffff);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_V0);
break;
case 'l': /* qemu_ld input arg constraint */
ct->ct |= TCG_CT_REG;
tcg_regset_set(ct->u.regs, 0xffffffff);
#if defined(CONFIG_SOFTMMU)
tcg_regset_reset_reg(ct->u.regs, TCG_REG_A0);
#endif
break;
case 'S': /* qemu_st constraint */
ct->ct |= TCG_CT_REG;
tcg_regset_set(ct->u.regs, 0xffffffff);
#if defined(CONFIG_SOFTMMU)
tcg_regset_reset_reg(ct->u.regs, TCG_REG_A0);
# if TARGET_LONG_BITS == 64
tcg_regset_reset_reg(ct->u.regs, TCG_REG_A1);
# endif
tcg_regset_reset_reg(ct->u.regs, TCG_REG_A2);
#endif
break;
case 'I':
ct->ct |= TCG_CT_CONST_U16;
break;
case 'J':
ct->ct |= TCG_CT_CONST_S16;
break;
case 'Z':
/* We are cheating a bit here, using the fact that the register
ZERO is also the register number 0. Hence there is no need
to check for const_args in each instruction. */
ct->ct |= TCG_CT_CONST_ZERO;
break;
default:
return -1;
}
ct_str++;
*pct_str = ct_str;
return 0;
}
/* test if a constant matches the constraint */
static inline int tcg_target_const_match(tcg_target_long val,
const TCGArgConstraint *arg_ct)
{
int ct;
ct = arg_ct->ct;
if (ct & TCG_CT_CONST)
return 1;
else if ((ct & TCG_CT_CONST_ZERO) && val == 0)
return 1;
else if ((ct & TCG_CT_CONST_U16) && val == (uint16_t)val)
return 1;
else if ((ct & TCG_CT_CONST_S16) && val == (int16_t)val)
return 1;
else
return 0;
}
/* instruction opcodes */
enum {
OPC_SPECIAL = 0x00 << 26,
OPC_BEQ = 0x04 << 26,
OPC_BNE = 0x05 << 26,
OPC_ADDIU = 0x09 << 26,
OPC_ANDI = 0x0C << 26,
OPC_ORI = 0x0D << 26,
OPC_XORI = 0x0E << 26,
OPC_LUI = 0x0F << 26,
OPC_LB = 0x20 << 26,
OPC_LH = 0x21 << 26,
OPC_LW = 0x23 << 26,
OPC_LBU = 0x24 << 26,
OPC_LHU = 0x25 << 26,
OPC_LWU = 0x27 << 26,
OPC_SB = 0x28 << 26,
OPC_SH = 0x29 << 26,
OPC_SW = 0x2B << 26,
OPC_SLL = OPC_SPECIAL | 0x00,
OPC_SRL = OPC_SPECIAL | 0x02,
OPC_SRA = OPC_SPECIAL | 0x03,
OPC_SLLV = OPC_SPECIAL | 0x04,
OPC_SRLV = OPC_SPECIAL | 0x06,
OPC_SRAV = OPC_SPECIAL | 0x07,
OPC_JR = OPC_SPECIAL | 0x08,
OPC_JALR = OPC_SPECIAL | 0x09,
OPC_MFHI = OPC_SPECIAL | 0x10,
OPC_MFLO = OPC_SPECIAL | 0x12,
OPC_MULT = OPC_SPECIAL | 0x18,
OPC_MULTU = OPC_SPECIAL | 0x19,
OPC_DIV = OPC_SPECIAL | 0x1A,
OPC_DIVU = OPC_SPECIAL | 0x1B,
OPC_ADDU = OPC_SPECIAL | 0x21,
OPC_SUBU = OPC_SPECIAL | 0x23,
OPC_AND = OPC_SPECIAL | 0x24,
OPC_OR = OPC_SPECIAL | 0x25,
OPC_XOR = OPC_SPECIAL | 0x26,
OPC_NOR = OPC_SPECIAL | 0x27,
OPC_SLT = OPC_SPECIAL | 0x2A,
OPC_SLTU = OPC_SPECIAL | 0x2B,
};
/*
* Type reg
*/
static inline void tcg_out_opc_reg(TCGContext *s, int opc, int rd, int rs, int rt)
{
int32_t inst;
inst = opc;
inst |= (rs & 0x1F) << 21;
inst |= (rt & 0x1F) << 16;
inst |= (rd & 0x1F) << 11;
tcg_out32(s, inst);
}
/*
* Type immediate
*/
static inline void tcg_out_opc_imm(TCGContext *s, int opc, int rt, int rs, int imm)
{
int32_t inst;
inst = opc;
inst |= (rs & 0x1F) << 21;
inst |= (rt & 0x1F) << 16;
inst |= (imm & 0xffff);
tcg_out32(s, inst);
}
/*
* Type sa
*/
static inline void tcg_out_opc_sa(TCGContext *s, int opc, int rd, int rt, int sa)
{
int32_t inst;
inst = opc;
inst |= (rt & 0x1F) << 16;
inst |= (rd & 0x1F) << 11;
inst |= (sa & 0x1F) << 6;
tcg_out32(s, inst);
}
static inline void tcg_out_nop(TCGContext *s)
{
tcg_out32(s, 0);
}
static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
{
tcg_out_opc_reg(s, OPC_ADDU, ret, arg, TCG_REG_ZERO);
}
static inline void tcg_out_movi(TCGContext *s, TCGType type,
int reg, int32_t arg)
{
if (arg == (int16_t)arg) {
tcg_out_opc_imm(s, OPC_ADDIU, reg, TCG_REG_ZERO, arg);
} else if (arg == (uint16_t)arg) {
tcg_out_opc_imm(s, OPC_ORI, reg, TCG_REG_ZERO, arg);
} else {
tcg_out_opc_imm(s, OPC_LUI, reg, 0, arg >> 16);
tcg_out_opc_imm(s, OPC_ORI, reg, reg, arg & 0xffff);
}
}
static inline void tcg_out_bswap16(TCGContext *s, int ret, int arg)
{
/* ret and arg can't be register at */
if (ret == TCG_REG_AT || arg == TCG_REG_AT) {
tcg_abort();
}
tcg_out_opc_sa(s, OPC_SRL, TCG_REG_AT, arg, 8);
tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_AT, TCG_REG_AT, 0x00ff);
tcg_out_opc_sa(s, OPC_SLL, ret, arg, 8);
tcg_out_opc_imm(s, OPC_ANDI, ret, ret, 0xff00);
tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_REG_AT);
}
static inline void tcg_out_bswap16s(TCGContext *s, int ret, int arg)
{
/* ret and arg can't be register at */
if (ret == TCG_REG_AT || arg == TCG_REG_AT) {
tcg_abort();
}
tcg_out_opc_sa(s, OPC_SRL, TCG_REG_AT, arg, 8);
tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_AT, TCG_REG_AT, 0xff);
tcg_out_opc_sa(s, OPC_SLL, ret, arg, 24);
tcg_out_opc_sa(s, OPC_SRA, ret, ret, 16);
tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_REG_AT);
}
static inline void tcg_out_bswap32(TCGContext *s, int ret, int arg)
{
/* ret and arg must be different and can't be register at */
if (ret == arg || ret == TCG_REG_AT || arg == TCG_REG_AT) {
tcg_abort();
}
tcg_out_opc_sa(s, OPC_SLL, ret, arg, 24);
tcg_out_opc_sa(s, OPC_SRL, TCG_REG_AT, arg, 24);
tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_REG_AT);
tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_AT, arg, 0xff00);
tcg_out_opc_sa(s, OPC_SLL, TCG_REG_AT, TCG_REG_AT, 8);
tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_REG_AT);
tcg_out_opc_sa(s, OPC_SRL, TCG_REG_AT, arg, 8);
tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_AT, TCG_REG_AT, 0xff00);
tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_REG_AT);
}
static inline void tcg_out_ldst(TCGContext *s, int opc, int arg,
int arg1, tcg_target_long arg2)
{
if (arg2 == (int16_t) arg2) {
tcg_out_opc_imm(s, opc, arg, arg1, arg2);
} else {
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_AT, arg2);
tcg_out_opc_reg(s, OPC_ADDU, TCG_REG_AT, TCG_REG_AT, arg1);
tcg_out_opc_imm(s, opc, arg, TCG_REG_AT, 0);
}
}
static inline void tcg_out_ld(TCGContext *s, TCGType type, int arg,
int arg1, tcg_target_long arg2)
{
tcg_out_ldst(s, OPC_LW, arg, arg1, arg2);
}
static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,
int arg1, tcg_target_long arg2)
{
tcg_out_ldst(s, OPC_SW, arg, arg1, arg2);
}
static inline void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
{
if (val == (int16_t)val) {
tcg_out_opc_imm(s, OPC_ADDIU, reg, reg, val);
} else {
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_AT, val);
tcg_out_opc_reg(s, OPC_ADDU, reg, reg, TCG_REG_AT);
}
}
static void tcg_out_brcond(TCGContext *s, int cond, int arg1,
int arg2, int label_index)
{
TCGLabel *l = &s->labels[label_index];
switch (cond) {
case TCG_COND_EQ:
tcg_out_opc_imm(s, OPC_BEQ, arg1, arg2, 0);
break;
case TCG_COND_NE:
tcg_out_opc_imm(s, OPC_BNE, arg1, arg2, 0);
break;
case TCG_COND_LT:
tcg_out_opc_reg(s, OPC_SLT, TCG_REG_AT, arg1, arg2);
tcg_out_opc_imm(s, OPC_BNE, TCG_REG_AT, TCG_REG_ZERO, 0);
break;
case TCG_COND_LTU:
tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_AT, arg1, arg2);
tcg_out_opc_imm(s, OPC_BNE, TCG_REG_AT, TCG_REG_ZERO, 0);
break;
case TCG_COND_GE:
tcg_out_opc_reg(s, OPC_SLT, TCG_REG_AT, arg1, arg2);
tcg_out_opc_imm(s, OPC_BEQ, TCG_REG_AT, TCG_REG_ZERO, 0);
break;
case TCG_COND_GEU:
tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_AT, arg1, arg2);
tcg_out_opc_imm(s, OPC_BEQ, TCG_REG_AT, TCG_REG_ZERO, 0);
break;
case TCG_COND_LE:
tcg_out_opc_reg(s, OPC_SLT, TCG_REG_AT, arg2, arg1);
tcg_out_opc_imm(s, OPC_BEQ, TCG_REG_AT, TCG_REG_ZERO, 0);
break;
case TCG_COND_LEU:
tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_AT, arg2, arg1);
tcg_out_opc_imm(s, OPC_BEQ, TCG_REG_AT, TCG_REG_ZERO, 0);
break;
case TCG_COND_GT:
tcg_out_opc_reg(s, OPC_SLT, TCG_REG_AT, arg2, arg1);
tcg_out_opc_imm(s, OPC_BNE, TCG_REG_AT, TCG_REG_ZERO, 0);
break;
case TCG_COND_GTU:
tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_AT, arg2, arg1);
tcg_out_opc_imm(s, OPC_BNE, TCG_REG_AT, TCG_REG_ZERO, 0);
break;
default:
tcg_abort();
break;
}
if (l->has_value) {
reloc_pc16(s->code_ptr - 4, l->u.value);
} else {
tcg_out_reloc(s, s->code_ptr - 4, R_MIPS_PC16, label_index, 0);
}
tcg_out_nop(s);
}
/* XXX: we implement it at the target level to avoid having to
handle cross basic blocks temporaries */
static void tcg_out_brcond2(TCGContext *s, int cond, int arg1,
int arg2, int arg3, int arg4, int label_index)
{
void *label_ptr;
switch(cond) {
case TCG_COND_NE:
tcg_out_brcond(s, TCG_COND_NE, arg2, arg4, label_index);
tcg_out_brcond(s, TCG_COND_NE, arg1, arg3, label_index);
return;
case TCG_COND_EQ:
break;
case TCG_COND_LT:
case TCG_COND_LE:
tcg_out_brcond(s, TCG_COND_LT, arg2, arg4, label_index);
break;
case TCG_COND_GT:
case TCG_COND_GE:
tcg_out_brcond(s, TCG_COND_GT, arg2, arg4, label_index);
break;
case TCG_COND_LTU:
case TCG_COND_LEU:
tcg_out_brcond(s, TCG_COND_LTU, arg2, arg4, label_index);
break;
case TCG_COND_GTU:
case TCG_COND_GEU:
tcg_out_brcond(s, TCG_COND_GTU, arg2, arg4, label_index);
break;
default:
tcg_abort();
}
label_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BNE, arg2, arg4, 0);
tcg_out_nop(s);
switch(cond) {
case TCG_COND_EQ:
tcg_out_brcond(s, TCG_COND_EQ, arg1, arg3, label_index);
break;
case TCG_COND_LT:
case TCG_COND_LTU:
tcg_out_brcond(s, TCG_COND_LTU, arg1, arg3, label_index);
break;
case TCG_COND_LE:
case TCG_COND_LEU:
tcg_out_brcond(s, TCG_COND_LEU, arg1, arg3, label_index);
break;
case TCG_COND_GT:
case TCG_COND_GTU:
tcg_out_brcond(s, TCG_COND_GTU, arg1, arg3, label_index);
break;
case TCG_COND_GE:
case TCG_COND_GEU:
tcg_out_brcond(s, TCG_COND_GEU, arg1, arg3, label_index);
break;
default:
tcg_abort();
}
reloc_pc16(label_ptr, (tcg_target_long) s->code_ptr);
}
#if defined(CONFIG_SOFTMMU)
#include "../../softmmu_defs.h"
static void *qemu_ld_helpers[4] = {
__ldb_mmu,
__ldw_mmu,
__ldl_mmu,
__ldq_mmu,
};
static void *qemu_st_helpers[4] = {
__stb_mmu,
__stw_mmu,
__stl_mmu,
__stq_mmu,
};
#endif
static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,
int opc)
{
int addr_regl, addr_reg1, addr_meml;
int data_regl, data_regh, data_reg1, data_reg2;
int mem_index, s_bits;
#if defined(CONFIG_SOFTMMU)
void *label1_ptr, *label2_ptr;
int sp_args;
#endif
#if TARGET_LONG_BITS == 64
# if defined(CONFIG_SOFTMMU)
uint8_t *label3_ptr;
# endif
int addr_regh, addr_reg2, addr_memh;
#endif
data_regl = *args++;
if (opc == 3)
data_regh = *args++;
else
data_regh = 0;
addr_regl = *args++;
#if TARGET_LONG_BITS == 64
addr_regh = *args++;
#endif
mem_index = *args;
s_bits = opc & 3;
if (opc == 3) {
#if defined(TCG_TARGET_WORDS_BIGENDIAN)
data_reg1 = data_regh;
data_reg2 = data_regl;
#else
data_reg1 = data_regl;
data_reg2 = data_regh;
#endif
} else {
data_reg1 = data_regl;
data_reg2 = 0;
}
#if TARGET_LONG_BITS == 64
# if defined(TCG_TARGET_WORDS_BIGENDIAN)
addr_reg1 = addr_regh;
addr_reg2 = addr_regl;
addr_memh = 0;
addr_meml = 4;
# else
addr_reg1 = addr_regl;
addr_reg2 = addr_regh;
addr_memh = 4;
addr_meml = 0;
# endif
#else
addr_reg1 = addr_regl;
addr_meml = 0;
#endif
#if defined(CONFIG_SOFTMMU)
tcg_out_opc_sa(s, OPC_SRL, TCG_REG_A0, addr_regl, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_A0, TCG_REG_A0, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);
tcg_out_opc_reg(s, OPC_ADDU, TCG_REG_A0, TCG_REG_A0, TCG_AREG0);
tcg_out_opc_imm(s, OPC_LW, TCG_REG_AT, TCG_REG_A0,
offsetof(CPUState, tlb_table[mem_index][0].addr_read) + addr_meml);
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_T0, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
tcg_out_opc_reg(s, OPC_AND, TCG_REG_T0, TCG_REG_T0, addr_regl);
# if TARGET_LONG_BITS == 64
label3_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BNE, TCG_REG_T0, TCG_REG_AT, 0);
tcg_out_nop(s);
tcg_out_opc_imm(s, OPC_LW, TCG_REG_AT, TCG_REG_A0,
offsetof(CPUState, tlb_table[mem_index][0].addr_read) + addr_memh);
label1_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BEQ, addr_regh, TCG_REG_AT, 0);
tcg_out_nop(s);
reloc_pc16(label3_ptr, (tcg_target_long) s->code_ptr);
# else
label1_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BEQ, TCG_REG_T0, TCG_REG_AT, 0);
tcg_out_nop(s);
# endif
/* slow path */
sp_args = TCG_REG_A0;
tcg_out_mov(s, sp_args++, addr_reg1);
# if TARGET_LONG_BITS == 64
tcg_out_mov(s, sp_args++, addr_reg2);
# endif
tcg_out_movi(s, TCG_TYPE_I32, sp_args++, mem_index);
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_T9, (tcg_target_long)qemu_ld_helpers[s_bits]);
tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, TCG_REG_T9, 0);
tcg_out_nop(s);
switch(opc) {
case 0:
tcg_out_opc_imm(s, OPC_ANDI, data_reg1, TCG_REG_V0, 0xff);
break;
case 0 | 4:
tcg_out_opc_sa(s, OPC_SLL, TCG_REG_V0, TCG_REG_V0, 24);
tcg_out_opc_sa(s, OPC_SRA, data_reg1, TCG_REG_V0, 24);
break;
case 1:
tcg_out_opc_imm(s, OPC_ANDI, data_reg1, TCG_REG_V0, 0xffff);
break;
case 1 | 4:
tcg_out_opc_sa(s, OPC_SLL, TCG_REG_V0, TCG_REG_V0, 16);
tcg_out_opc_sa(s, OPC_SRA, data_reg1, TCG_REG_V0, 16);
break;
case 2:
tcg_out_mov(s, data_reg1, TCG_REG_V0);
break;
case 3:
tcg_out_mov(s, data_reg2, TCG_REG_V1);
tcg_out_mov(s, data_reg1, TCG_REG_V0);
break;
default:
tcg_abort();
}
label2_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BEQ, TCG_REG_ZERO, TCG_REG_ZERO, 0);
tcg_out_nop(s);
/* label1: fast path */
reloc_pc16(label1_ptr, (tcg_target_long) s->code_ptr);
tcg_out_opc_imm(s, OPC_LW, TCG_REG_V0, TCG_REG_A0,
offsetof(CPUState, tlb_table[mem_index][0].addend) + addr_meml);
tcg_out_opc_reg(s, OPC_ADDU, TCG_REG_V0, TCG_REG_V0, addr_regl);
addr_reg1 = TCG_REG_V0;
#endif
switch(opc) {
case 0:
tcg_out_opc_imm(s, OPC_LBU, data_reg1, addr_reg1, 0);
break;
case 0 | 4:
tcg_out_opc_imm(s, OPC_LB, data_reg1, addr_reg1, 0);
break;
case 1:
if (TCG_NEED_BSWAP) {
tcg_out_opc_imm(s, OPC_LHU, TCG_REG_T0, addr_reg1, 0);
tcg_out_bswap16(s, data_reg1, TCG_REG_T0);
} else {
tcg_out_opc_imm(s, OPC_LHU, data_reg1, addr_reg1, 0);
}
break;
case 1 | 4:
if (TCG_NEED_BSWAP) {
tcg_out_opc_imm(s, OPC_LHU, TCG_REG_T0, addr_reg1, 0);
tcg_out_bswap16s(s, data_reg1, TCG_REG_T0);
} else {
tcg_out_opc_imm(s, OPC_LH, data_reg1, addr_reg1, 0);
}
break;
case 2:
if (TCG_NEED_BSWAP) {
tcg_out_opc_imm(s, OPC_LW, TCG_REG_T0, addr_reg1, 0);
tcg_out_bswap32(s, data_reg1, TCG_REG_T0);
} else {
tcg_out_opc_imm(s, OPC_LW, data_reg1, addr_reg1, 0);
}
break;
case 3:
#if !defined(CONFIG_SOFTMMU)
tcg_out_mov(s, TCG_REG_V0, addr_reg1);
addr_reg1 = TCG_REG_V0;
#endif
if (TCG_NEED_BSWAP) {
tcg_out_opc_imm(s, OPC_LW, TCG_REG_T0, addr_reg1, 4);
tcg_out_bswap32(s, data_reg1, TCG_REG_T0);
tcg_out_opc_imm(s, OPC_LW, TCG_REG_T0, addr_reg1, 0);
tcg_out_bswap32(s, data_reg2, TCG_REG_T0);
} else {
tcg_out_opc_imm(s, OPC_LW, data_reg1, addr_reg1, 0);
tcg_out_opc_imm(s, OPC_LW, data_reg2, addr_reg1, 4);
}
break;
default:
tcg_abort();
}
#if defined(CONFIG_SOFTMMU)
reloc_pc16(label2_ptr, (tcg_target_long) s->code_ptr);
#endif
}
static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
int opc)
{
int addr_regl, addr_reg1, addr_meml;
int data_regl, data_regh, data_reg1, data_reg2;
int mem_index, s_bits;
#if defined(CONFIG_SOFTMMU)
uint8_t *label1_ptr, *label2_ptr;
int sp_args;
#endif
#if TARGET_LONG_BITS == 64
# if defined(CONFIG_SOFTMMU)
uint8_t *label3_ptr;
# endif
int addr_regh, addr_reg2, addr_memh;
#endif
data_regl = *args++;
if (opc == 3) {
data_regh = *args++;
#if defined(TCG_TARGET_WORDS_BIGENDIAN)
data_reg1 = data_regh;
data_reg2 = data_regl;
#else
data_reg1 = data_regl;
data_reg2 = data_regh;
#endif
} else {
data_reg1 = data_regl;
data_reg2 = 0;
data_regh = 0;
}
addr_regl = *args++;
#if TARGET_LONG_BITS == 64
addr_regh = *args++;
# if defined(TCG_TARGET_WORDS_BIGENDIAN)
addr_reg1 = addr_regh;
addr_reg2 = addr_regl;
addr_memh = 0;
addr_meml = 4;
# else
addr_reg1 = addr_regl;
addr_reg2 = addr_regh;
addr_memh = 4;
addr_meml = 0;
# endif
#else
addr_reg1 = addr_regl;
addr_meml = 0;
#endif
mem_index = *args;
s_bits = opc;
#if defined(CONFIG_SOFTMMU)
tcg_out_opc_sa(s, OPC_SRL, TCG_REG_A0, addr_regl, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_A0, TCG_REG_A0, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);
tcg_out_opc_reg(s, OPC_ADDU, TCG_REG_A0, TCG_REG_A0, TCG_AREG0);
tcg_out_opc_imm(s, OPC_LW, TCG_REG_AT, TCG_REG_A0,
offsetof(CPUState, tlb_table[mem_index][0].addr_write) + addr_meml);
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_T0, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
tcg_out_opc_reg(s, OPC_AND, TCG_REG_T0, TCG_REG_T0, addr_regl);
# if TARGET_LONG_BITS == 64
label3_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BNE, TCG_REG_T0, TCG_REG_AT, 0);
tcg_out_nop(s);
tcg_out_opc_imm(s, OPC_LW, TCG_REG_AT, TCG_REG_A0,
offsetof(CPUState, tlb_table[mem_index][0].addr_write) + addr_memh);
label1_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BEQ, addr_regh, TCG_REG_AT, 0);
tcg_out_nop(s);
reloc_pc16(label3_ptr, (tcg_target_long) s->code_ptr);
# else
label1_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BEQ, TCG_REG_T0, TCG_REG_AT, 0);
tcg_out_nop(s);
# endif
/* slow path */
sp_args = TCG_REG_A0;
tcg_out_mov(s, sp_args++, addr_reg1);
# if TARGET_LONG_BITS == 64
tcg_out_mov(s, sp_args++, addr_reg2);
# endif
switch(opc) {
case 0:
tcg_out_opc_imm(s, OPC_ANDI, sp_args++, data_reg1, 0xff);
break;
case 1:
tcg_out_opc_imm(s, OPC_ANDI, sp_args++, data_reg1, 0xffff);
break;
case 2:
tcg_out_mov(s, sp_args++, data_reg1);
break;
case 3:
sp_args = (sp_args + 1) & ~1;
tcg_out_mov(s, sp_args++, data_reg1);
tcg_out_mov(s, sp_args++, data_reg2);
break;
default:
tcg_abort();
}
if (sp_args > TCG_REG_A3) {
/* Push mem_index on the stack */
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_AT, mem_index);
tcg_out_st(s, TCG_TYPE_I32, TCG_REG_AT, TCG_REG_SP, 16);
} else {
tcg_out_movi(s, TCG_TYPE_I32, sp_args, mem_index);
}
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_T9, (tcg_target_long)qemu_st_helpers[s_bits]);
tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, TCG_REG_T9, 0);
tcg_out_nop(s);
label2_ptr = s->code_ptr;
tcg_out_opc_imm(s, OPC_BEQ, TCG_REG_ZERO, TCG_REG_ZERO, 0);
tcg_out_nop(s);
/* label1: fast path */
reloc_pc16(label1_ptr, (tcg_target_long) s->code_ptr);
tcg_out_opc_imm(s, OPC_LW, TCG_REG_A0, TCG_REG_A0,
offsetof(CPUState, tlb_table[mem_index][0].addend) + addr_meml);
tcg_out_opc_reg(s, OPC_ADDU, TCG_REG_A0, TCG_REG_A0, addr_regl);
addr_reg1 = TCG_REG_A0;
#endif
switch(opc) {
case 0:
tcg_out_opc_imm(s, OPC_SB, data_reg1, addr_reg1, 0);
break;
case 1:
if (TCG_NEED_BSWAP) {
tcg_out_bswap16(s, TCG_REG_T0, data_reg1);
tcg_out_opc_imm(s, OPC_SH, TCG_REG_T0, addr_reg1, 0);
} else {
tcg_out_opc_imm(s, OPC_SH, data_reg1, addr_reg1, 0);
}
break;
case 2:
if (TCG_NEED_BSWAP) {
tcg_out_bswap32(s, TCG_REG_T0, data_reg1);
tcg_out_opc_imm(s, OPC_SW, TCG_REG_T0, addr_reg1, 0);
} else {
tcg_out_opc_imm(s, OPC_SW, data_reg1, addr_reg1, 0);
}
break;
case 3:
if (TCG_NEED_BSWAP) {
tcg_out_bswap32(s, TCG_REG_T0, data_reg2);
tcg_out_opc_imm(s, OPC_SW, TCG_REG_T0, addr_reg1, 0);
tcg_out_bswap32(s, TCG_REG_T0, data_reg1);
tcg_out_opc_imm(s, OPC_SW, TCG_REG_T0, addr_reg1, 4);
} else {
tcg_out_opc_imm(s, OPC_SW, data_reg1, addr_reg1, 0);
tcg_out_opc_imm(s, OPC_SW, data_reg2, addr_reg1, 4);
}
break;
default:
tcg_abort();
}
#if defined(CONFIG_SOFTMMU)
reloc_pc16(label2_ptr, (tcg_target_long) s->code_ptr);
#endif
}
static inline void tcg_out_op(TCGContext *s, int opc,
const TCGArg *args, const int *const_args)
{
switch(opc) {
case INDEX_op_exit_tb:
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_V0, args[0]);
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_AT, (tcg_target_long)tb_ret_addr);
tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_AT, 0);
tcg_out_nop(s);
break;
case INDEX_op_goto_tb:
if (s->tb_jmp_offset) {
/* direct jump method */
tcg_abort();
} else {
/* indirect jump method */
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_AT, (tcg_target_long)(s->tb_next + args[0]));
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_AT, TCG_REG_AT, 0);
tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_AT, 0);
}
tcg_out_nop(s);
s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
break;
case INDEX_op_call:
tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, args[0], 0);
tcg_out_nop(s);
break;
case INDEX_op_jmp:
tcg_out_opc_reg(s, OPC_JR, 0, args[0], 0);
tcg_out_nop(s);
break;
case INDEX_op_br:
tcg_out_brcond(s, TCG_COND_EQ, TCG_REG_ZERO, TCG_REG_ZERO, args[0]);
break;
case INDEX_op_mov_i32:
tcg_out_mov(s, args[0], args[1]);
break;
case INDEX_op_movi_i32:
tcg_out_movi(s, TCG_TYPE_I32, args[0], args[1]);
break;
case INDEX_op_ld8u_i32:
tcg_out_ldst(s, OPC_LBU, args[0], args[1], args[2]);
break;
case INDEX_op_ld8s_i32:
tcg_out_ldst(s, OPC_LB, args[0], args[1], args[2]);
break;
case INDEX_op_ld16u_i32:
tcg_out_ldst(s, OPC_LHU, args[0], args[1], args[2]);
break;
case INDEX_op_ld16s_i32:
tcg_out_ldst(s, OPC_LH, args[0], args[1], args[2]);
break;
case INDEX_op_ld_i32:
tcg_out_ldst(s, OPC_LW, args[0], args[1], args[2]);
break;
case INDEX_op_st8_i32:
tcg_out_ldst(s, OPC_SB, args[0], args[1], args[2]);
break;
case INDEX_op_st16_i32:
tcg_out_ldst(s, OPC_SH, args[0], args[1], args[2]);
break;
case INDEX_op_st_i32:
tcg_out_ldst(s, OPC_SW, args[0], args[1], args[2]);
break;
case INDEX_op_add_i32:
if (const_args[2]) {
tcg_out_opc_imm(s, OPC_ADDIU, args[0], args[1], args[2]);
} else {
tcg_out_opc_reg(s, OPC_ADDU, args[0], args[1], args[2]);
}
break;
case INDEX_op_add2_i32:
if (const_args[4]) {
tcg_out_opc_imm(s, OPC_ADDIU, TCG_REG_AT, args[2], args[4]);
} else {
tcg_out_opc_reg(s, OPC_ADDU, TCG_REG_AT, args[2], args[4]);
}
tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_T0, TCG_REG_AT, args[2]);
if (const_args[5]) {
tcg_out_opc_imm(s, OPC_ADDIU, args[1], args[3], args[5]);
} else {
tcg_out_opc_reg(s, OPC_ADDU, args[1], args[3], args[5]);
}
tcg_out_opc_reg(s, OPC_ADDU, args[1], args[1], TCG_REG_T0);
tcg_out_mov(s, args[0], TCG_REG_AT);
break;
case INDEX_op_sub_i32:
if (const_args[2]) {
tcg_out_opc_imm(s, OPC_ADDIU, args[0], args[1], -args[2]);
} else {
tcg_out_opc_reg(s, OPC_SUBU, args[0], args[1], args[2]);
}
break;
case INDEX_op_sub2_i32:
if (const_args[4]) {
tcg_out_opc_imm(s, OPC_ADDIU, TCG_REG_AT, args[2], -args[4]);
} else {
tcg_out_opc_reg(s, OPC_SUBU, TCG_REG_AT, args[2], args[4]);
}
tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_T0, args[2], TCG_REG_AT);
if (const_args[5]) {
tcg_out_opc_imm(s, OPC_ADDIU, args[1], args[3], -args[5]);
} else {
tcg_out_opc_reg(s, OPC_SUBU, args[1], args[3], args[5]);
}
tcg_out_opc_reg(s, OPC_SUBU, args[1], args[1], TCG_REG_T0);
tcg_out_mov(s, args[0], TCG_REG_AT);
break;
case INDEX_op_mul_i32:
tcg_out_opc_reg(s, OPC_MULT, 0, args[1], args[2]);
tcg_out_opc_reg(s, OPC_MFLO, args[0], 0, 0);
break;
case INDEX_op_mulu2_i32:
tcg_out_opc_reg(s, OPC_MULTU, 0, args[2], args[3]);
tcg_out_opc_reg(s, OPC_MFLO, args[0], 0, 0);
tcg_out_opc_reg(s, OPC_MFHI, args[1], 0, 0);
break;
case INDEX_op_div_i32:
tcg_out_opc_reg(s, OPC_DIV, 0, args[1], args[2]);
tcg_out_opc_reg(s, OPC_MFLO, args[0], 0, 0);
break;
case INDEX_op_divu_i32:
tcg_out_opc_reg(s, OPC_DIVU, 0, args[1], args[2]);
tcg_out_opc_reg(s, OPC_MFLO, args[0], 0, 0);
break;
case INDEX_op_rem_i32:
tcg_out_opc_reg(s, OPC_DIV, 0, args[1], args[2]);
tcg_out_opc_reg(s, OPC_MFHI, args[0], 0, 0);
break;
case INDEX_op_remu_i32:
tcg_out_opc_reg(s, OPC_DIVU, 0, args[1], args[2]);
tcg_out_opc_reg(s, OPC_MFHI, args[0], 0, 0);
break;
case INDEX_op_and_i32:
if (const_args[2]) {
tcg_out_opc_imm(s, OPC_ANDI, args[0], args[1], args[2]);
} else {
tcg_out_opc_reg(s, OPC_AND, args[0], args[1], args[2]);
}
break;
case INDEX_op_or_i32:
if (const_args[2]) {
tcg_out_opc_imm(s, OPC_ORI, args[0], args[1], args[2]);
} else {
tcg_out_opc_reg(s, OPC_OR, args[0], args[1], args[2]);
}
break;
case INDEX_op_not_i32:
tcg_out_opc_reg(s, OPC_NOR, args[0], args[1], args[1]);
break;
case INDEX_op_xor_i32:
if (const_args[2]) {
tcg_out_opc_imm(s, OPC_XORI, args[0], args[1], args[2]);
} else {
tcg_out_opc_reg(s, OPC_XOR, args[0], args[1], args[2]);
}
break;
case INDEX_op_sar_i32:
if (const_args[2]) {
tcg_out_opc_sa(s, OPC_SRA, args[0], args[1], args[2]);
} else {
tcg_out_opc_reg(s, OPC_SRAV, args[0], args[2], args[1]);
}
break;
case INDEX_op_shl_i32:
if (const_args[2]) {
tcg_out_opc_sa(s, OPC_SLL, args[0], args[1], args[2]);
} else {
tcg_out_opc_reg(s, OPC_SLLV, args[0], args[2], args[1]);
}
break;
case INDEX_op_shr_i32:
if (const_args[2]) {
tcg_out_opc_sa(s, OPC_SRL, args[0], args[1], args[2]);
} else {
tcg_out_opc_reg(s, OPC_SRLV, args[0], args[2], args[1]);
}
break;
case INDEX_op_brcond_i32:
tcg_out_brcond(s, args[2], args[0], args[1], args[3]);
break;
case INDEX_op_brcond2_i32:
tcg_out_brcond2(s, args[4], args[0], args[1], args[2], args[3], args[5]);
break;
case INDEX_op_qemu_ld8u:
tcg_out_qemu_ld(s, args, 0);
break;
case INDEX_op_qemu_ld8s:
tcg_out_qemu_ld(s, args, 0 | 4);
break;
case INDEX_op_qemu_ld16u:
tcg_out_qemu_ld(s, args, 1);
break;
case INDEX_op_qemu_ld16s:
tcg_out_qemu_ld(s, args, 1 | 4);
break;
case INDEX_op_qemu_ld32u:
tcg_out_qemu_ld(s, args, 2);
break;
case INDEX_op_qemu_ld64:
tcg_out_qemu_ld(s, args, 3);
break;
case INDEX_op_qemu_st8:
tcg_out_qemu_st(s, args, 0);
break;
case INDEX_op_qemu_st16:
tcg_out_qemu_st(s, args, 1);
break;
case INDEX_op_qemu_st32:
tcg_out_qemu_st(s, args, 2);
break;
case INDEX_op_qemu_st64:
tcg_out_qemu_st(s, args, 3);
break;
default:
tcg_abort();
}
}
static const TCGTargetOpDef mips_op_defs[] = {
{ INDEX_op_exit_tb, { } },
{ INDEX_op_goto_tb, { } },
{ INDEX_op_call, { "C" } },
{ INDEX_op_jmp, { "r" } },
{ INDEX_op_br, { } },
{ INDEX_op_mov_i32, { "r", "r" } },
{ INDEX_op_movi_i32, { "r" } },
{ INDEX_op_ld8u_i32, { "r", "r" } },
{ INDEX_op_ld8s_i32, { "r", "r" } },
{ INDEX_op_ld16u_i32, { "r", "r" } },
{ INDEX_op_ld16s_i32, { "r", "r" } },
{ INDEX_op_ld_i32, { "r", "r" } },
{ INDEX_op_st8_i32, { "rZ", "r" } },
{ INDEX_op_st16_i32, { "rZ", "r" } },
{ INDEX_op_st_i32, { "rZ", "r" } },
{ INDEX_op_add_i32, { "r", "rZ", "rJZ" } },
{ INDEX_op_mul_i32, { "r", "rZ", "rZ" } },
{ INDEX_op_mulu2_i32, { "r", "r", "rZ", "rZ" } },
{ INDEX_op_div_i32, { "r", "rZ", "rZ" } },
{ INDEX_op_divu_i32, { "r", "rZ", "rZ" } },
{ INDEX_op_rem_i32, { "r", "rZ", "rZ" } },
{ INDEX_op_remu_i32, { "r", "rZ", "rZ" } },
{ INDEX_op_sub_i32, { "r", "rZ", "rJZ" } },
{ INDEX_op_and_i32, { "r", "rZ", "rIZ" } },
{ INDEX_op_not_i32, { "r", "rZ" } },
{ INDEX_op_or_i32, { "r", "rZ", "rIZ" } },
{ INDEX_op_xor_i32, { "r", "rZ", "rIZ" } },
{ INDEX_op_shl_i32, { "r", "rZ", "riZ" } },
{ INDEX_op_shr_i32, { "r", "rZ", "riZ" } },
{ INDEX_op_sar_i32, { "r", "rZ", "riZ" } },
{ INDEX_op_brcond_i32, { "rZ", "rZ" } },
{ INDEX_op_add2_i32, { "r", "r", "rZ", "rZ", "rJZ", "rJZ" } },
{ INDEX_op_sub2_i32, { "r", "r", "rZ", "rZ", "rJZ", "rJZ" } },
{ INDEX_op_brcond2_i32, { "rZ", "rZ", "rZ", "rZ" } },
#if TARGET_LONG_BITS == 32
{ INDEX_op_qemu_ld8u, { "L", "lZ" } },
{ INDEX_op_qemu_ld8s, { "L", "lZ" } },
{ INDEX_op_qemu_ld16u, { "L", "lZ" } },
{ INDEX_op_qemu_ld16s, { "L", "lZ" } },
{ INDEX_op_qemu_ld32u, { "L", "lZ" } },
{ INDEX_op_qemu_ld64, { "L", "L", "lZ" } },
{ INDEX_op_qemu_st8, { "SZ", "SZ" } },
{ INDEX_op_qemu_st16, { "SZ", "SZ" } },
{ INDEX_op_qemu_st32, { "SZ", "SZ" } },
{ INDEX_op_qemu_st64, { "SZ", "SZ", "SZ" } },
#else
{ INDEX_op_qemu_ld8u, { "L", "lZ", "lZ" } },
{ INDEX_op_qemu_ld8s, { "L", "lZ", "lZ" } },
{ INDEX_op_qemu_ld16u, { "L", "lZ", "lZ" } },
{ INDEX_op_qemu_ld16s, { "L", "lZ", "lZ" } },
{ INDEX_op_qemu_ld32u, { "L", "lZ", "lZ" } },
{ INDEX_op_qemu_ld64, { "L", "L", "lZ", "lZ" } },
{ INDEX_op_qemu_st8, { "SZ", "SZ", "SZ" } },
{ INDEX_op_qemu_st16, { "SZ", "SZ", "SZ" } },
{ INDEX_op_qemu_st32, { "SZ", "SZ", "SZ" } },
{ INDEX_op_qemu_st64, { "SZ", "SZ", "SZ", "SZ" } },
#endif
{ -1 },
};
static int tcg_target_callee_save_regs[] = {
TCG_REG_S0,
TCG_REG_S1,
TCG_REG_S2,
TCG_REG_S3,
TCG_REG_S4,
TCG_REG_S5,
TCG_REG_S6,
TCG_REG_S7,
TCG_REG_GP,
/* TCG_REG_FP, */ /* currently used for the global env, so np
need to save */
TCG_REG_RA, /* should be last for ABI compliance */
};
/* Generate global QEMU prologue and epilogue code */
void tcg_target_qemu_prologue(TCGContext *s)
{
int i, frame_size;
/* reserve some stack space */
frame_size = ARRAY_SIZE(tcg_target_callee_save_regs) * 4
+ TCG_STATIC_CALL_ARGS_SIZE;
frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) &
~(TCG_TARGET_STACK_ALIGN - 1);
/* TB prologue */
tcg_out_addi(s, TCG_REG_SP, -frame_size);
for(i = 0 ; i < ARRAY_SIZE(tcg_target_callee_save_regs) ; i++) {
tcg_out_st(s, TCG_TYPE_I32, tcg_target_callee_save_regs[i],
TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE + i * 4);
}
/* Call generated code */
tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_A0, 0);
tcg_out_nop(s);
tb_ret_addr = s->code_ptr;
/* TB epilogue */
for(i = 0 ; i < ARRAY_SIZE(tcg_target_callee_save_regs) ; i++) {
tcg_out_ld(s, TCG_TYPE_I32, tcg_target_callee_save_regs[i],
TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE + i * 4);
}
tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0);
tcg_out_addi(s, TCG_REG_SP, frame_size);
}
void tcg_target_init(TCGContext *s)
{
tcg_regset_set(tcg_target_available_regs[TCG_TYPE_I32], 0xffffffff);
tcg_regset_set(tcg_target_call_clobber_regs,
(1 << TCG_REG_V0) |
(1 << TCG_REG_V1) |
(1 << TCG_REG_A0) |
(1 << TCG_REG_A1) |
(1 << TCG_REG_A2) |
(1 << TCG_REG_A3) |
(1 << TCG_REG_T1) |
(1 << TCG_REG_T2) |
(1 << TCG_REG_T3) |
(1 << TCG_REG_T4) |
(1 << TCG_REG_T5) |
(1 << TCG_REG_T6) |
(1 << TCG_REG_T7) |
(1 << TCG_REG_T8) |
(1 << TCG_REG_T9));
tcg_regset_clear(s->reserved_regs);
tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO); /* zero register */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_K0); /* kernel use only */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_K1); /* kernel use only */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_AT); /* internal use */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_T0); /* internal use */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_RA); /* return address */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); /* stack pointer */
tcg_add_target_add_op_defs(mips_op_defs);
}
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