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tcg-target.c
1699 lines (1522 loc) · 46.9 KB
/
tcg-target.c
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/*
* 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 TCG_CT_CONST_U32 0x100
static uint8_t *tb_ret_addr;
#define FAST_PATH
#if TARGET_LONG_BITS == 32
#define LD_ADDR LWZU
#define CMP_L 0
#else
#define LD_ADDR LDU
#define CMP_L (1<<21)
#endif
#ifndef GUEST_BASE
#define GUEST_BASE 0
#endif
#ifdef CONFIG_USE_GUEST_BASE
#define TCG_GUEST_BASE_REG 30
#else
#define TCG_GUEST_BASE_REG 0
#endif
#ifndef NDEBUG
static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
"r0",
"r1",
"r2",
"r3",
"r4",
"r5",
"r6",
"r7",
"r8",
"r9",
"r10",
"r11",
"r12",
"r13",
"r14",
"r15",
"r16",
"r17",
"r18",
"r19",
"r20",
"r21",
"r22",
"r23",
"r24",
"r25",
"r26",
"r27",
"r28",
"r29",
"r30",
"r31"
};
#endif
static const int tcg_target_reg_alloc_order[] = {
TCG_REG_R14,
TCG_REG_R15,
TCG_REG_R16,
TCG_REG_R17,
TCG_REG_R18,
TCG_REG_R19,
TCG_REG_R20,
TCG_REG_R21,
TCG_REG_R22,
TCG_REG_R23,
TCG_REG_R28,
TCG_REG_R29,
TCG_REG_R30,
TCG_REG_R31,
#ifdef __APPLE__
TCG_REG_R2,
#endif
TCG_REG_R3,
TCG_REG_R4,
TCG_REG_R5,
TCG_REG_R6,
TCG_REG_R7,
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
#ifndef __APPLE__
TCG_REG_R11,
#endif
TCG_REG_R12,
TCG_REG_R24,
TCG_REG_R25,
TCG_REG_R26,
TCG_REG_R27
};
static const int tcg_target_call_iarg_regs[] = {
TCG_REG_R3,
TCG_REG_R4,
TCG_REG_R5,
TCG_REG_R6,
TCG_REG_R7,
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10
};
static const int tcg_target_call_oarg_regs[2] = {
TCG_REG_R3
};
static const int tcg_target_callee_save_regs[] = {
#ifdef __APPLE__
TCG_REG_R11,
#endif
TCG_REG_R14,
TCG_REG_R15,
TCG_REG_R16,
TCG_REG_R17,
TCG_REG_R18,
TCG_REG_R19,
TCG_REG_R20,
TCG_REG_R21,
TCG_REG_R22,
TCG_REG_R23,
TCG_REG_R24,
TCG_REG_R25,
TCG_REG_R26,
/* TCG_REG_R27, */ /* currently used for the global env, so no
need to save */
TCG_REG_R28,
TCG_REG_R29,
TCG_REG_R30,
TCG_REG_R31
};
static uint32_t reloc_pc24_val (void *pc, tcg_target_long target)
{
tcg_target_long disp;
disp = target - (tcg_target_long) pc;
if ((disp << 38) >> 38 != disp)
tcg_abort ();
return disp & 0x3fffffc;
}
static void reloc_pc24 (void *pc, tcg_target_long target)
{
*(uint32_t *) pc = (*(uint32_t *) pc & ~0x3fffffc)
| reloc_pc24_val (pc, target);
}
static uint16_t reloc_pc14_val (void *pc, tcg_target_long target)
{
tcg_target_long disp;
disp = target - (tcg_target_long) pc;
if (disp != (int16_t) disp)
tcg_abort ();
return disp & 0xfffc;
}
static void reloc_pc14 (void *pc, tcg_target_long target)
{
*(uint32_t *) pc = (*(uint32_t *) pc & ~0xfffc)
| reloc_pc14_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_PPC_REL14:
reloc_pc14 (code_ptr, value);
break;
case R_PPC_REL24:
reloc_pc24 (code_ptr, value);
break;
default:
tcg_abort ();
}
}
/* maximum number of register used for input function arguments */
static int tcg_target_get_call_iarg_regs_count (int flags)
{
return ARRAY_SIZE (tcg_target_call_iarg_regs);
}
/* 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 'A': case 'B': case 'C': case 'D':
ct->ct |= TCG_CT_REG;
tcg_regset_set_reg (ct->u.regs, 3 + ct_str[0] - 'A');
break;
case 'r':
ct->ct |= TCG_CT_REG;
tcg_regset_set32 (ct->u.regs, 0, 0xffffffff);
break;
case 'L': /* qemu_ld constraint */
ct->ct |= TCG_CT_REG;
tcg_regset_set32 (ct->u.regs, 0, 0xffffffff);
tcg_regset_reset_reg (ct->u.regs, TCG_REG_R3);
#ifdef CONFIG_SOFTMMU
tcg_regset_reset_reg (ct->u.regs, TCG_REG_R4);
#endif
break;
case 'S': /* qemu_st constraint */
ct->ct |= TCG_CT_REG;
tcg_regset_set32 (ct->u.regs, 0, 0xffffffff);
tcg_regset_reset_reg (ct->u.regs, TCG_REG_R3);
#ifdef CONFIG_SOFTMMU
tcg_regset_reset_reg (ct->u.regs, TCG_REG_R4);
tcg_regset_reset_reg (ct->u.regs, TCG_REG_R5);
#endif
break;
case 'Z':
ct->ct |= TCG_CT_CONST_U32;
break;
default:
return -1;
}
ct_str++;
*pct_str = ct_str;
return 0;
}
/* test if a constant matches the constraint */
static 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_U32) && (val == (uint32_t) val))
return 1;
return 0;
}
#define OPCD(opc) ((opc)<<26)
#define XO19(opc) (OPCD(19)|((opc)<<1))
#define XO30(opc) (OPCD(30)|((opc)<<2))
#define XO31(opc) (OPCD(31)|((opc)<<1))
#define XO58(opc) (OPCD(58)|(opc))
#define XO62(opc) (OPCD(62)|(opc))
#define B OPCD( 18)
#define BC OPCD( 16)
#define LBZ OPCD( 34)
#define LHZ OPCD( 40)
#define LHA OPCD( 42)
#define LWZ OPCD( 32)
#define STB OPCD( 38)
#define STH OPCD( 44)
#define STW OPCD( 36)
#define STD XO62( 0)
#define STDU XO62( 1)
#define STDX XO31(149)
#define LD XO58( 0)
#define LDX XO31( 21)
#define LDU XO58( 1)
#define LWA XO58( 2)
#define LWAX XO31(341)
#define ADDIC OPCD( 12)
#define ADDI OPCD( 14)
#define ADDIS OPCD( 15)
#define ORI OPCD( 24)
#define ORIS OPCD( 25)
#define XORI OPCD( 26)
#define XORIS OPCD( 27)
#define ANDI OPCD( 28)
#define ANDIS OPCD( 29)
#define MULLI OPCD( 7)
#define CMPLI OPCD( 10)
#define CMPI OPCD( 11)
#define LWZU OPCD( 33)
#define STWU OPCD( 37)
#define RLWINM OPCD( 21)
#define RLDICL XO30( 0)
#define RLDICR XO30( 1)
#define RLDIMI XO30( 3)
#define BCLR XO19( 16)
#define BCCTR XO19(528)
#define CRAND XO19(257)
#define CRANDC XO19(129)
#define CRNAND XO19(225)
#define CROR XO19(449)
#define CRNOR XO19( 33)
#define EXTSB XO31(954)
#define EXTSH XO31(922)
#define EXTSW XO31(986)
#define ADD XO31(266)
#define ADDE XO31(138)
#define ADDC XO31( 10)
#define AND XO31( 28)
#define SUBF XO31( 40)
#define SUBFC XO31( 8)
#define SUBFE XO31(136)
#define OR XO31(444)
#define XOR XO31(316)
#define MULLW XO31(235)
#define MULHWU XO31( 11)
#define DIVW XO31(491)
#define DIVWU XO31(459)
#define CMP XO31( 0)
#define CMPL XO31( 32)
#define LHBRX XO31(790)
#define LWBRX XO31(534)
#define STHBRX XO31(918)
#define STWBRX XO31(662)
#define MFSPR XO31(339)
#define MTSPR XO31(467)
#define SRAWI XO31(824)
#define NEG XO31(104)
#define MFCR XO31( 19)
#define CNTLZW XO31( 26)
#define CNTLZD XO31( 58)
#define MULLD XO31(233)
#define MULHD XO31( 73)
#define MULHDU XO31( 9)
#define DIVD XO31(489)
#define DIVDU XO31(457)
#define LBZX XO31( 87)
#define LHZX XO31(279)
#define LHAX XO31(343)
#define LWZX XO31( 23)
#define STBX XO31(215)
#define STHX XO31(407)
#define STWX XO31(151)
#define SPR(a,b) ((((a)<<5)|(b))<<11)
#define LR SPR(8, 0)
#define CTR SPR(9, 0)
#define SLW XO31( 24)
#define SRW XO31(536)
#define SRAW XO31(792)
#define SLD XO31( 27)
#define SRD XO31(539)
#define SRAD XO31(794)
#define SRADI XO31(413<<1)
#define TW XO31( 4)
#define TRAP (TW | TO (31))
#define RT(r) ((r)<<21)
#define RS(r) ((r)<<21)
#define RA(r) ((r)<<16)
#define RB(r) ((r)<<11)
#define TO(t) ((t)<<21)
#define SH(s) ((s)<<11)
#define MB(b) ((b)<<6)
#define ME(e) ((e)<<1)
#define BO(o) ((o)<<21)
#define MB64(b) ((b)<<5)
#define LK 1
#define TAB(t,a,b) (RT(t) | RA(a) | RB(b))
#define SAB(s,a,b) (RS(s) | RA(a) | RB(b))
#define BF(n) ((n)<<23)
#define BI(n, c) (((c)+((n)*4))<<16)
#define BT(n, c) (((c)+((n)*4))<<21)
#define BA(n, c) (((c)+((n)*4))<<16)
#define BB(n, c) (((c)+((n)*4))<<11)
#define BO_COND_TRUE BO (12)
#define BO_COND_FALSE BO ( 4)
#define BO_ALWAYS BO (20)
enum {
CR_LT,
CR_GT,
CR_EQ,
CR_SO
};
static const uint32_t tcg_to_bc[10] = {
[TCG_COND_EQ] = BC | BI (7, CR_EQ) | BO_COND_TRUE,
[TCG_COND_NE] = BC | BI (7, CR_EQ) | BO_COND_FALSE,
[TCG_COND_LT] = BC | BI (7, CR_LT) | BO_COND_TRUE,
[TCG_COND_GE] = BC | BI (7, CR_LT) | BO_COND_FALSE,
[TCG_COND_LE] = BC | BI (7, CR_GT) | BO_COND_FALSE,
[TCG_COND_GT] = BC | BI (7, CR_GT) | BO_COND_TRUE,
[TCG_COND_LTU] = BC | BI (7, CR_LT) | BO_COND_TRUE,
[TCG_COND_GEU] = BC | BI (7, CR_LT) | BO_COND_FALSE,
[TCG_COND_LEU] = BC | BI (7, CR_GT) | BO_COND_FALSE,
[TCG_COND_GTU] = BC | BI (7, CR_GT) | BO_COND_TRUE,
};
static void tcg_out_mov (TCGContext *s, TCGType type, int ret, int arg)
{
tcg_out32 (s, OR | SAB (arg, ret, arg));
}
static void tcg_out_rld (TCGContext *s, int op, int ra, int rs, int sh, int mb)
{
sh = SH (sh & 0x1f) | (((sh >> 5) & 1) << 1);
mb = MB64 ((mb >> 5) | ((mb << 1) & 0x3f));
tcg_out32 (s, op | RA (ra) | RS (rs) | sh | mb);
}
static void tcg_out_movi32 (TCGContext *s, int ret, int32_t arg)
{
if (arg == (int16_t) arg)
tcg_out32 (s, ADDI | RT (ret) | RA (0) | (arg & 0xffff));
else {
tcg_out32 (s, ADDIS | RT (ret) | RA (0) | ((arg >> 16) & 0xffff));
if (arg & 0xffff)
tcg_out32 (s, ORI | RS (ret) | RA (ret) | (arg & 0xffff));
}
}
static void tcg_out_movi (TCGContext *s, TCGType type,
int ret, tcg_target_long arg)
{
int32_t arg32 = arg;
arg = type == TCG_TYPE_I32 ? arg & 0xffffffff : arg;
if (arg == arg32) {
tcg_out_movi32 (s, ret, arg32);
}
else {
if ((uint64_t) arg >> 32) {
uint16_t h16 = arg >> 16;
uint16_t l16 = arg;
tcg_out_movi32 (s, ret, arg >> 32);
tcg_out_rld (s, RLDICR, ret, ret, 32, 31);
if (h16) tcg_out32 (s, ORIS | RS (ret) | RA (ret) | h16);
if (l16) tcg_out32 (s, ORI | RS (ret) | RA (ret) | l16);
}
else {
tcg_out_movi32 (s, ret, arg32);
if (arg32 < 0)
tcg_out_rld (s, RLDICL, ret, ret, 0, 32);
}
}
}
static void tcg_out_b (TCGContext *s, int mask, tcg_target_long target)
{
tcg_target_long disp;
disp = target - (tcg_target_long) s->code_ptr;
if ((disp << 38) >> 38 == disp)
tcg_out32 (s, B | (disp & 0x3fffffc) | mask);
else {
tcg_out_movi (s, TCG_TYPE_I64, 0, (tcg_target_long) target);
tcg_out32 (s, MTSPR | RS (0) | CTR);
tcg_out32 (s, BCCTR | BO_ALWAYS | mask);
}
}
static void tcg_out_call (TCGContext *s, tcg_target_long arg, int const_arg)
{
#ifdef __APPLE__
if (const_arg) {
tcg_out_b (s, LK, arg);
}
else {
tcg_out32 (s, MTSPR | RS (arg) | LR);
tcg_out32 (s, BCLR | BO_ALWAYS | LK);
}
#else
int reg;
if (const_arg) {
reg = 2;
tcg_out_movi (s, TCG_TYPE_I64, reg, arg);
}
else reg = arg;
tcg_out32 (s, LD | RT (0) | RA (reg));
tcg_out32 (s, MTSPR | RA (0) | CTR);
tcg_out32 (s, LD | RT (11) | RA (reg) | 16);
tcg_out32 (s, LD | RT (2) | RA (reg) | 8);
tcg_out32 (s, BCCTR | BO_ALWAYS | LK);
#endif
}
static void tcg_out_ldst (TCGContext *s, int ret, int addr,
int offset, int op1, int op2)
{
if (offset == (int16_t) offset)
tcg_out32 (s, op1 | RT (ret) | RA (addr) | (offset & 0xffff));
else {
tcg_out_movi (s, TCG_TYPE_I64, 0, offset);
tcg_out32 (s, op2 | RT (ret) | RA (addr) | RB (0));
}
}
static void tcg_out_ldsta (TCGContext *s, int ret, int addr,
int offset, int op1, int op2)
{
if (offset == (int16_t) (offset & ~3))
tcg_out32 (s, op1 | RT (ret) | RA (addr) | (offset & 0xffff));
else {
tcg_out_movi (s, TCG_TYPE_I64, 0, offset);
tcg_out32 (s, op2 | RT (ret) | RA (addr) | RB (0));
}
}
#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,
};
static void tcg_out_tlb_read (TCGContext *s, int r0, int r1, int r2,
int addr_reg, int s_bits, int offset)
{
#if TARGET_LONG_BITS == 32
tcg_out_rld (s, RLDICL, addr_reg, addr_reg, 0, 32);
tcg_out32 (s, (RLWINM
| RA (r0)
| RS (addr_reg)
| SH (32 - (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS))
| MB (32 - (CPU_TLB_BITS + CPU_TLB_ENTRY_BITS))
| ME (31 - CPU_TLB_ENTRY_BITS)
)
);
tcg_out32 (s, ADD | RT (r0) | RA (r0) | RB (TCG_AREG0));
tcg_out32 (s, (LWZU | RT (r1) | RA (r0) | offset));
tcg_out32 (s, (RLWINM
| RA (r2)
| RS (addr_reg)
| SH (0)
| MB ((32 - s_bits) & 31)
| ME (31 - TARGET_PAGE_BITS)
)
);
#else
tcg_out_rld (s, RLDICL, r0, addr_reg,
64 - TARGET_PAGE_BITS,
64 - CPU_TLB_BITS);
tcg_out_rld (s, RLDICR, r0, r0,
CPU_TLB_ENTRY_BITS,
63 - CPU_TLB_ENTRY_BITS);
tcg_out32 (s, ADD | TAB (r0, r0, TCG_AREG0));
tcg_out32 (s, LD_ADDR | RT (r1) | RA (r0) | offset);
if (!s_bits) {
tcg_out_rld (s, RLDICR, r2, addr_reg, 0, 63 - TARGET_PAGE_BITS);
}
else {
tcg_out_rld (s, RLDICL, r2, addr_reg,
64 - TARGET_PAGE_BITS,
TARGET_PAGE_BITS - s_bits);
tcg_out_rld (s, RLDICL, r2, r2, TARGET_PAGE_BITS, 0);
}
#endif
}
#endif
static void tcg_out_qemu_ld (TCGContext *s, const TCGArg *args, int opc)
{
int addr_reg, data_reg, r0, r1, rbase, mem_index, s_bits, bswap;
#ifdef CONFIG_SOFTMMU
int r2;
void *label1_ptr, *label2_ptr;
#endif
data_reg = *args++;
addr_reg = *args++;
mem_index = *args;
s_bits = opc & 3;
#ifdef CONFIG_SOFTMMU
r0 = 3;
r1 = 4;
r2 = 0;
rbase = 0;
tcg_out_tlb_read (s, r0, r1, r2, addr_reg, s_bits,
offsetof (CPUState, tlb_table[mem_index][0].addr_read));
tcg_out32 (s, CMP | BF (7) | RA (r2) | RB (r1) | CMP_L);
label1_ptr = s->code_ptr;
#ifdef FAST_PATH
tcg_out32 (s, BC | BI (7, CR_EQ) | BO_COND_TRUE);
#endif
/* slow path */
tcg_out_mov (s, TCG_TYPE_I64, 3, addr_reg);
tcg_out_movi (s, TCG_TYPE_I64, 4, mem_index);
tcg_out_call (s, (tcg_target_long) qemu_ld_helpers[s_bits], 1);
switch (opc) {
case 0|4:
tcg_out32 (s, EXTSB | RA (data_reg) | RS (3));
break;
case 1|4:
tcg_out32 (s, EXTSH | RA (data_reg) | RS (3));
break;
case 2|4:
tcg_out32 (s, EXTSW | RA (data_reg) | RS (3));
break;
case 0:
case 1:
case 2:
case 3:
if (data_reg != 3)
tcg_out_mov (s, TCG_TYPE_I64, data_reg, 3);
break;
}
label2_ptr = s->code_ptr;
tcg_out32 (s, B);
/* label1: fast path */
#ifdef FAST_PATH
reloc_pc14 (label1_ptr, (tcg_target_long) s->code_ptr);
#endif
/* r0 now contains &env->tlb_table[mem_index][index].addr_read */
tcg_out32 (s, (LD
| RT (r0)
| RA (r0)
| (offsetof (CPUTLBEntry, addend)
- offsetof (CPUTLBEntry, addr_read))
));
/* r0 = env->tlb_table[mem_index][index].addend */
tcg_out32 (s, ADD | RT (r0) | RA (r0) | RB (addr_reg));
/* r0 = env->tlb_table[mem_index][index].addend + addr */
#else /* !CONFIG_SOFTMMU */
#if TARGET_LONG_BITS == 32
tcg_out_rld (s, RLDICL, addr_reg, addr_reg, 0, 32);
#endif
r0 = addr_reg;
r1 = 3;
rbase = GUEST_BASE ? TCG_GUEST_BASE_REG : 0;
#endif
#ifdef TARGET_WORDS_BIGENDIAN
bswap = 0;
#else
bswap = 1;
#endif
switch (opc) {
default:
case 0:
tcg_out32 (s, LBZX | TAB (data_reg, rbase, r0));
break;
case 0|4:
tcg_out32 (s, LBZX | TAB (data_reg, rbase, r0));
tcg_out32 (s, EXTSB | RA (data_reg) | RS (data_reg));
break;
case 1:
if (bswap)
tcg_out32 (s, LHBRX | TAB (data_reg, rbase, r0));
else
tcg_out32 (s, LHZX | TAB (data_reg, rbase, r0));
break;
case 1|4:
if (bswap) {
tcg_out32 (s, LHBRX | TAB (data_reg, rbase, r0));
tcg_out32 (s, EXTSH | RA (data_reg) | RS (data_reg));
}
else tcg_out32 (s, LHAX | TAB (data_reg, rbase, r0));
break;
case 2:
if (bswap)
tcg_out32 (s, LWBRX | TAB (data_reg, rbase, r0));
else
tcg_out32 (s, LWZX | TAB (data_reg, rbase, r0));
break;
case 2|4:
if (bswap) {
tcg_out32 (s, LWBRX | TAB (data_reg, rbase, r0));
tcg_out32 (s, EXTSW | RA (data_reg) | RS (data_reg));
}
else tcg_out32 (s, LWAX | TAB (data_reg, rbase, r0));
break;
case 3:
#ifdef CONFIG_USE_GUEST_BASE
if (bswap) {
tcg_out32 (s, ADDI | RT (r1) | RA (r0) | 4);
tcg_out32 (s, LWBRX | TAB (data_reg, rbase, r0));
tcg_out32 (s, LWBRX | TAB ( r1, rbase, r1));
tcg_out_rld (s, RLDIMI, data_reg, r1, 32, 0);
}
else tcg_out32 (s, LDX | TAB (data_reg, rbase, r0));
#else
if (bswap) {
tcg_out_movi32 (s, 0, 4);
tcg_out32 (s, LWBRX | RT (data_reg) | RB (r0));
tcg_out32 (s, LWBRX | RT ( r1) | RA (r0));
tcg_out_rld (s, RLDIMI, data_reg, r1, 32, 0);
}
else tcg_out32 (s, LD | RT (data_reg) | RA (r0));
#endif
break;
}
#ifdef CONFIG_SOFTMMU
reloc_pc24 (label2_ptr, (tcg_target_long) s->code_ptr);
#endif
}
static void tcg_out_qemu_st (TCGContext *s, const TCGArg *args, int opc)
{
int addr_reg, r0, r1, rbase, data_reg, mem_index, bswap;
#ifdef CONFIG_SOFTMMU
int r2;
void *label1_ptr, *label2_ptr;
#endif
data_reg = *args++;
addr_reg = *args++;
mem_index = *args;
#ifdef CONFIG_SOFTMMU
r0 = 3;
r1 = 4;
r2 = 0;
rbase = 0;
tcg_out_tlb_read (s, r0, r1, r2, addr_reg, opc,
offsetof (CPUState, tlb_table[mem_index][0].addr_write));
tcg_out32 (s, CMP | BF (7) | RA (r2) | RB (r1) | CMP_L);
label1_ptr = s->code_ptr;
#ifdef FAST_PATH
tcg_out32 (s, BC | BI (7, CR_EQ) | BO_COND_TRUE);
#endif
/* slow path */
tcg_out_mov (s, TCG_TYPE_I64, 3, addr_reg);
tcg_out_rld (s, RLDICL, 4, data_reg, 0, 64 - (1 << (3 + opc)));
tcg_out_movi (s, TCG_TYPE_I64, 5, mem_index);
tcg_out_call (s, (tcg_target_long) qemu_st_helpers[opc], 1);
label2_ptr = s->code_ptr;
tcg_out32 (s, B);
/* label1: fast path */
#ifdef FAST_PATH
reloc_pc14 (label1_ptr, (tcg_target_long) s->code_ptr);
#endif
tcg_out32 (s, (LD
| RT (r0)
| RA (r0)
| (offsetof (CPUTLBEntry, addend)
- offsetof (CPUTLBEntry, addr_write))
));
/* r0 = env->tlb_table[mem_index][index].addend */
tcg_out32 (s, ADD | RT (r0) | RA (r0) | RB (addr_reg));
/* r0 = env->tlb_table[mem_index][index].addend + addr */
#else /* !CONFIG_SOFTMMU */
#if TARGET_LONG_BITS == 32
tcg_out_rld (s, RLDICL, addr_reg, addr_reg, 0, 32);
#endif
r1 = 3;
r0 = addr_reg;
rbase = GUEST_BASE ? TCG_GUEST_BASE_REG : 0;
#endif
#ifdef TARGET_WORDS_BIGENDIAN
bswap = 0;
#else
bswap = 1;
#endif
switch (opc) {
case 0:
tcg_out32 (s, STBX | SAB (data_reg, rbase, r0));
break;
case 1:
if (bswap)
tcg_out32 (s, STHBRX | SAB (data_reg, rbase, r0));
else
tcg_out32 (s, STHX | SAB (data_reg, rbase, r0));
break;
case 2:
if (bswap)
tcg_out32 (s, STWBRX | SAB (data_reg, rbase, r0));
else
tcg_out32 (s, STWX | SAB (data_reg, rbase, r0));
break;
case 3:
if (bswap) {
tcg_out32 (s, STWBRX | SAB (data_reg, rbase, r0));
tcg_out32 (s, ADDI | RT (r1) | RA (r0) | 4);
tcg_out_rld (s, RLDICL, 0, data_reg, 32, 0);
tcg_out32 (s, STWBRX | SAB (0, rbase, r1));
}
else tcg_out32 (s, STDX | SAB (data_reg, rbase, r0));
break;
}
#ifdef CONFIG_SOFTMMU
reloc_pc24 (label2_ptr, (tcg_target_long) s->code_ptr);
#endif
}
static void tcg_target_qemu_prologue (TCGContext *s)
{
int i, frame_size;
#ifndef __APPLE__
uint64_t addr;
#endif
frame_size = 0
+ 8 /* back chain */
+ 8 /* CR */
+ 8 /* LR */
+ 8 /* compiler doubleword */
+ 8 /* link editor doubleword */
+ 8 /* TOC save area */
+ TCG_STATIC_CALL_ARGS_SIZE
+ ARRAY_SIZE (tcg_target_callee_save_regs) * 8
;
frame_size = (frame_size + 15) & ~15;
#ifndef __APPLE__
/* First emit adhoc function descriptor */
addr = (uint64_t) s->code_ptr + 24;
tcg_out32 (s, addr >> 32); tcg_out32 (s, addr); /* entry point */
s->code_ptr += 16; /* skip TOC and environment pointer */
#endif
/* Prologue */
tcg_out32 (s, MFSPR | RT (0) | LR);
tcg_out32 (s, STDU | RS (1) | RA (1) | (-frame_size & 0xffff));
for (i = 0; i < ARRAY_SIZE (tcg_target_callee_save_regs); ++i)
tcg_out32 (s, (STD
| RS (tcg_target_callee_save_regs[i])
| RA (1)
| (i * 8 + 48 + TCG_STATIC_CALL_ARGS_SIZE)
)
);
tcg_out32 (s, STD | RS (0) | RA (1) | (frame_size + 16));
#ifdef CONFIG_USE_GUEST_BASE
if (GUEST_BASE) {
tcg_out_movi (s, TCG_TYPE_I64, TCG_GUEST_BASE_REG, GUEST_BASE);
tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
}
#endif
tcg_out32 (s, MTSPR | RS (3) | CTR);
tcg_out32 (s, BCCTR | BO_ALWAYS);
/* Epilogue */
tb_ret_addr = s->code_ptr;
for (i = 0; i < ARRAY_SIZE (tcg_target_callee_save_regs); ++i)
tcg_out32 (s, (LD
| RT (tcg_target_callee_save_regs[i])
| RA (1)
| (i * 8 + 48 + TCG_STATIC_CALL_ARGS_SIZE)
)
);
tcg_out32 (s, LD | RT (0) | RA (1) | (frame_size + 16));
tcg_out32 (s, MTSPR | RS (0) | LR);
tcg_out32 (s, ADDI | RT (1) | RA (1) | frame_size);
tcg_out32 (s, BCLR | BO_ALWAYS);
}
static void tcg_out_ld (TCGContext *s, TCGType type, int ret, int arg1,
tcg_target_long arg2)
{
if (type == TCG_TYPE_I32)
tcg_out_ldst (s, ret, arg1, arg2, LWZ, LWZX);
else
tcg_out_ldsta (s, ret, arg1, arg2, LD, LDX);
}
static void tcg_out_st (TCGContext *s, TCGType type, int arg, int arg1,
tcg_target_long arg2)
{
if (type == TCG_TYPE_I32)
tcg_out_ldst (s, arg, arg1, arg2, STW, STWX);
else
tcg_out_ldsta (s, arg, arg1, arg2, STD, STDX);
}
static void ppc_addi32 (TCGContext *s, int rt, int ra, tcg_target_long si)
{
if (!si && rt == ra)
return;
if (si == (int16_t) si)
tcg_out32 (s, ADDI | RT (rt) | RA (ra) | (si & 0xffff));
else {
uint16_t h = ((si >> 16) & 0xffff) + ((uint16_t) si >> 15);
tcg_out32 (s, ADDIS | RT (rt) | RA (ra) | h);
tcg_out32 (s, ADDI | RT (rt) | RA (rt) | (si & 0xffff));
}
}
static void ppc_addi64 (TCGContext *s, int rt, int ra, tcg_target_long si)
{
/* XXX: suboptimal */
if (si == (int16_t) si
|| ((((uint64_t) si >> 31) == 0) && (si & 0x8000) == 0))
ppc_addi32 (s, rt, ra, si);
else {
tcg_out_movi (s, TCG_TYPE_I64, 0, si);
tcg_out32 (s, ADD | RT (rt) | RA (ra));
}
}
static void tcg_out_addi (TCGContext *s, int reg, tcg_target_long val)
{
ppc_addi64 (s, reg, reg, val);
}
static void tcg_out_cmp (TCGContext *s, int cond, TCGArg arg1, TCGArg arg2,
int const_arg2, int cr, int arch64)
{
int imm;
uint32_t op;
switch (cond) {
case TCG_COND_EQ:
case TCG_COND_NE:
if (const_arg2) {
if ((int16_t) arg2 == arg2) {
op = CMPI;
imm = 1;
break;
}
else if ((uint16_t) arg2 == arg2) {
op = CMPLI;
imm = 1;
break;
}
}
op = CMPL;
imm = 0;
break;