This merges the implementation of tcg_out_addi and tcg_out_subi. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com> Tested-by: Claudio Fontana <claudio.fontana@huawei.com>
1494 lines
48 KiB
C
1494 lines
48 KiB
C
/*
|
|
* Initial TCG Implementation for aarch64
|
|
*
|
|
* Copyright (c) 2013 Huawei Technologies Duesseldorf GmbH
|
|
* Written by Claudio Fontana
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or
|
|
* (at your option) any later version.
|
|
*
|
|
* See the COPYING file in the top-level directory for details.
|
|
*/
|
|
|
|
#include "tcg-be-ldst.h"
|
|
#include "qemu/bitops.h"
|
|
|
|
/* We're going to re-use TCGType in setting of the SF bit, which controls
|
|
the size of the operation performed. If we know the values match, it
|
|
makes things much cleaner. */
|
|
QEMU_BUILD_BUG_ON(TCG_TYPE_I32 != 0 || TCG_TYPE_I64 != 1);
|
|
|
|
#ifndef NDEBUG
|
|
static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
|
|
"%x0", "%x1", "%x2", "%x3", "%x4", "%x5", "%x6", "%x7",
|
|
"%x8", "%x9", "%x10", "%x11", "%x12", "%x13", "%x14", "%x15",
|
|
"%x16", "%x17", "%x18", "%x19", "%x20", "%x21", "%x22", "%x23",
|
|
"%x24", "%x25", "%x26", "%x27", "%x28",
|
|
"%fp", /* frame pointer */
|
|
"%lr", /* link register */
|
|
"%sp", /* stack pointer */
|
|
};
|
|
#endif /* NDEBUG */
|
|
|
|
#ifdef TARGET_WORDS_BIGENDIAN
|
|
#define TCG_LDST_BSWAP 1
|
|
#else
|
|
#define TCG_LDST_BSWAP 0
|
|
#endif
|
|
|
|
static const int tcg_target_reg_alloc_order[] = {
|
|
TCG_REG_X20, TCG_REG_X21, TCG_REG_X22, TCG_REG_X23,
|
|
TCG_REG_X24, TCG_REG_X25, TCG_REG_X26, TCG_REG_X27,
|
|
TCG_REG_X28, /* we will reserve this for GUEST_BASE if configured */
|
|
|
|
TCG_REG_X9, TCG_REG_X10, TCG_REG_X11, TCG_REG_X12,
|
|
TCG_REG_X13, TCG_REG_X14, TCG_REG_X15,
|
|
TCG_REG_X16, TCG_REG_X17,
|
|
|
|
TCG_REG_X18, TCG_REG_X19, /* will not use these, see tcg_target_init */
|
|
|
|
TCG_REG_X0, TCG_REG_X1, TCG_REG_X2, TCG_REG_X3,
|
|
TCG_REG_X4, TCG_REG_X5, TCG_REG_X6, TCG_REG_X7,
|
|
|
|
TCG_REG_X8, /* will not use, see tcg_target_init */
|
|
};
|
|
|
|
static const int tcg_target_call_iarg_regs[8] = {
|
|
TCG_REG_X0, TCG_REG_X1, TCG_REG_X2, TCG_REG_X3,
|
|
TCG_REG_X4, TCG_REG_X5, TCG_REG_X6, TCG_REG_X7
|
|
};
|
|
static const int tcg_target_call_oarg_regs[1] = {
|
|
TCG_REG_X0
|
|
};
|
|
|
|
#define TCG_REG_TMP TCG_REG_X8
|
|
|
|
#ifndef CONFIG_SOFTMMU
|
|
# if defined(CONFIG_USE_GUEST_BASE)
|
|
# define TCG_REG_GUEST_BASE TCG_REG_X28
|
|
# else
|
|
# define TCG_REG_GUEST_BASE TCG_REG_XZR
|
|
# endif
|
|
#endif
|
|
|
|
static inline void reloc_pc26(void *code_ptr, intptr_t target)
|
|
{
|
|
intptr_t offset = (target - (intptr_t)code_ptr) / 4;
|
|
/* read instruction, mask away previous PC_REL26 parameter contents,
|
|
set the proper offset, then write back the instruction. */
|
|
uint32_t insn = *(uint32_t *)code_ptr;
|
|
insn = deposit32(insn, 0, 26, offset);
|
|
*(uint32_t *)code_ptr = insn;
|
|
}
|
|
|
|
static inline void reloc_pc19(void *code_ptr, intptr_t target)
|
|
{
|
|
intptr_t offset = (target - (intptr_t)code_ptr) / 4;
|
|
/* read instruction, mask away previous PC_REL19 parameter contents,
|
|
set the proper offset, then write back the instruction. */
|
|
uint32_t insn = *(uint32_t *)code_ptr;
|
|
insn = deposit32(insn, 5, 19, offset);
|
|
*(uint32_t *)code_ptr = insn;
|
|
}
|
|
|
|
static inline void patch_reloc(uint8_t *code_ptr, int type,
|
|
intptr_t value, intptr_t addend)
|
|
{
|
|
value += addend;
|
|
|
|
switch (type) {
|
|
case R_AARCH64_JUMP26:
|
|
case R_AARCH64_CALL26:
|
|
reloc_pc26(code_ptr, value);
|
|
break;
|
|
case R_AARCH64_CONDBR19:
|
|
reloc_pc19(code_ptr, value);
|
|
break;
|
|
|
|
default:
|
|
tcg_abort();
|
|
}
|
|
}
|
|
|
|
/* parse target specific constraints */
|
|
static int target_parse_constraint(TCGArgConstraint *ct,
|
|
const char **pct_str)
|
|
{
|
|
const char *ct_str = *pct_str;
|
|
|
|
switch (ct_str[0]) {
|
|
case 'r':
|
|
ct->ct |= TCG_CT_REG;
|
|
tcg_regset_set32(ct->u.regs, 0, (1ULL << TCG_TARGET_NB_REGS) - 1);
|
|
break;
|
|
case 'l': /* qemu_ld / qemu_st address, data_reg */
|
|
ct->ct |= TCG_CT_REG;
|
|
tcg_regset_set32(ct->u.regs, 0, (1ULL << TCG_TARGET_NB_REGS) - 1);
|
|
#ifdef CONFIG_SOFTMMU
|
|
/* x0 and x1 will be overwritten when reading the tlb entry,
|
|
and x2, and x3 for helper args, better to avoid using them. */
|
|
tcg_regset_reset_reg(ct->u.regs, TCG_REG_X0);
|
|
tcg_regset_reset_reg(ct->u.regs, TCG_REG_X1);
|
|
tcg_regset_reset_reg(ct->u.regs, TCG_REG_X2);
|
|
tcg_regset_reset_reg(ct->u.regs, TCG_REG_X3);
|
|
#endif
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
ct_str++;
|
|
*pct_str = ct_str;
|
|
return 0;
|
|
}
|
|
|
|
static inline int tcg_target_const_match(tcg_target_long val,
|
|
const TCGArgConstraint *arg_ct)
|
|
{
|
|
int ct = arg_ct->ct;
|
|
|
|
if (ct & TCG_CT_CONST) {
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
enum aarch64_cond_code {
|
|
COND_EQ = 0x0,
|
|
COND_NE = 0x1,
|
|
COND_CS = 0x2, /* Unsigned greater or equal */
|
|
COND_HS = COND_CS, /* ALIAS greater or equal */
|
|
COND_CC = 0x3, /* Unsigned less than */
|
|
COND_LO = COND_CC, /* ALIAS Lower */
|
|
COND_MI = 0x4, /* Negative */
|
|
COND_PL = 0x5, /* Zero or greater */
|
|
COND_VS = 0x6, /* Overflow */
|
|
COND_VC = 0x7, /* No overflow */
|
|
COND_HI = 0x8, /* Unsigned greater than */
|
|
COND_LS = 0x9, /* Unsigned less or equal */
|
|
COND_GE = 0xa,
|
|
COND_LT = 0xb,
|
|
COND_GT = 0xc,
|
|
COND_LE = 0xd,
|
|
COND_AL = 0xe,
|
|
COND_NV = 0xf, /* behaves like COND_AL here */
|
|
};
|
|
|
|
static const enum aarch64_cond_code tcg_cond_to_aarch64[] = {
|
|
[TCG_COND_EQ] = COND_EQ,
|
|
[TCG_COND_NE] = COND_NE,
|
|
[TCG_COND_LT] = COND_LT,
|
|
[TCG_COND_GE] = COND_GE,
|
|
[TCG_COND_LE] = COND_LE,
|
|
[TCG_COND_GT] = COND_GT,
|
|
/* unsigned */
|
|
[TCG_COND_LTU] = COND_LO,
|
|
[TCG_COND_GTU] = COND_HI,
|
|
[TCG_COND_GEU] = COND_HS,
|
|
[TCG_COND_LEU] = COND_LS,
|
|
};
|
|
|
|
/* opcodes for LDR / STR instructions with base + simm9 addressing */
|
|
enum aarch64_ldst_op_data { /* size of the data moved */
|
|
LDST_8 = 0x38,
|
|
LDST_16 = 0x78,
|
|
LDST_32 = 0xb8,
|
|
LDST_64 = 0xf8,
|
|
};
|
|
enum aarch64_ldst_op_type { /* type of operation */
|
|
LDST_ST = 0x0, /* store */
|
|
LDST_LD = 0x4, /* load */
|
|
LDST_LD_S_X = 0x8, /* load and sign-extend into Xt */
|
|
LDST_LD_S_W = 0xc, /* load and sign-extend into Wt */
|
|
};
|
|
|
|
/* We encode the format of the insn into the beginning of the name, so that
|
|
we can have the preprocessor help "typecheck" the insn vs the output
|
|
function. Arm didn't provide us with nice names for the formats, so we
|
|
use the section number of the architecture reference manual in which the
|
|
instruction group is described. */
|
|
typedef enum {
|
|
/* Add/subtract immediate instructions. */
|
|
I3401_ADDI = 0x11000000,
|
|
I3401_ADDSI = 0x31000000,
|
|
I3401_SUBI = 0x51000000,
|
|
I3401_SUBSI = 0x71000000,
|
|
|
|
/* Add/subtract shifted register instructions (without a shift). */
|
|
I3502_ADD = 0x0b000000,
|
|
I3502_ADDS = 0x2b000000,
|
|
I3502_SUB = 0x4b000000,
|
|
I3502_SUBS = 0x6b000000,
|
|
|
|
/* Add/subtract shifted register instructions (with a shift). */
|
|
I3502S_ADD_LSL = I3502_ADD,
|
|
|
|
/* Data-processing (2 source) instructions. */
|
|
I3508_LSLV = 0x1ac02000,
|
|
I3508_LSRV = 0x1ac02400,
|
|
I3508_ASRV = 0x1ac02800,
|
|
I3508_RORV = 0x1ac02c00,
|
|
|
|
/* Logical shifted register instructions (without a shift). */
|
|
I3510_AND = 0x0a000000,
|
|
I3510_ORR = 0x2a000000,
|
|
I3510_EOR = 0x4a000000,
|
|
I3510_ANDS = 0x6a000000,
|
|
} AArch64Insn;
|
|
|
|
static inline enum aarch64_ldst_op_data
|
|
aarch64_ldst_get_data(TCGOpcode tcg_op)
|
|
{
|
|
switch (tcg_op) {
|
|
case INDEX_op_ld8u_i32:
|
|
case INDEX_op_ld8s_i32:
|
|
case INDEX_op_ld8u_i64:
|
|
case INDEX_op_ld8s_i64:
|
|
case INDEX_op_st8_i32:
|
|
case INDEX_op_st8_i64:
|
|
return LDST_8;
|
|
|
|
case INDEX_op_ld16u_i32:
|
|
case INDEX_op_ld16s_i32:
|
|
case INDEX_op_ld16u_i64:
|
|
case INDEX_op_ld16s_i64:
|
|
case INDEX_op_st16_i32:
|
|
case INDEX_op_st16_i64:
|
|
return LDST_16;
|
|
|
|
case INDEX_op_ld_i32:
|
|
case INDEX_op_st_i32:
|
|
case INDEX_op_ld32u_i64:
|
|
case INDEX_op_ld32s_i64:
|
|
case INDEX_op_st32_i64:
|
|
return LDST_32;
|
|
|
|
case INDEX_op_ld_i64:
|
|
case INDEX_op_st_i64:
|
|
return LDST_64;
|
|
|
|
default:
|
|
tcg_abort();
|
|
}
|
|
}
|
|
|
|
static inline enum aarch64_ldst_op_type
|
|
aarch64_ldst_get_type(TCGOpcode tcg_op)
|
|
{
|
|
switch (tcg_op) {
|
|
case INDEX_op_st8_i32:
|
|
case INDEX_op_st16_i32:
|
|
case INDEX_op_st8_i64:
|
|
case INDEX_op_st16_i64:
|
|
case INDEX_op_st_i32:
|
|
case INDEX_op_st32_i64:
|
|
case INDEX_op_st_i64:
|
|
return LDST_ST;
|
|
|
|
case INDEX_op_ld8u_i32:
|
|
case INDEX_op_ld16u_i32:
|
|
case INDEX_op_ld8u_i64:
|
|
case INDEX_op_ld16u_i64:
|
|
case INDEX_op_ld_i32:
|
|
case INDEX_op_ld32u_i64:
|
|
case INDEX_op_ld_i64:
|
|
return LDST_LD;
|
|
|
|
case INDEX_op_ld8s_i32:
|
|
case INDEX_op_ld16s_i32:
|
|
return LDST_LD_S_W;
|
|
|
|
case INDEX_op_ld8s_i64:
|
|
case INDEX_op_ld16s_i64:
|
|
case INDEX_op_ld32s_i64:
|
|
return LDST_LD_S_X;
|
|
|
|
default:
|
|
tcg_abort();
|
|
}
|
|
}
|
|
|
|
static inline uint32_t tcg_in32(TCGContext *s)
|
|
{
|
|
uint32_t v = *(uint32_t *)s->code_ptr;
|
|
return v;
|
|
}
|
|
|
|
/* Emit an opcode with "type-checking" of the format. */
|
|
#define tcg_out_insn(S, FMT, OP, ...) \
|
|
glue(tcg_out_insn_,FMT)(S, glue(glue(glue(I,FMT),_),OP), ## __VA_ARGS__)
|
|
|
|
static void tcg_out_insn_3401(TCGContext *s, AArch64Insn insn, TCGType ext,
|
|
TCGReg rd, TCGReg rn, uint64_t aimm)
|
|
{
|
|
if (aimm > 0xfff) {
|
|
assert((aimm & 0xfff) == 0);
|
|
aimm >>= 12;
|
|
assert(aimm <= 0xfff);
|
|
aimm |= 1 << 12; /* apply LSL 12 */
|
|
}
|
|
tcg_out32(s, insn | ext << 31 | aimm << 10 | rn << 5 | rd);
|
|
}
|
|
|
|
/* This function is for both 3.5.2 (Add/Subtract shifted register), for
|
|
the rare occasion when we actually want to supply a shift amount. */
|
|
static inline void tcg_out_insn_3502S(TCGContext *s, AArch64Insn insn,
|
|
TCGType ext, TCGReg rd, TCGReg rn,
|
|
TCGReg rm, int imm6)
|
|
{
|
|
tcg_out32(s, insn | ext << 31 | rm << 16 | imm6 << 10 | rn << 5 | rd);
|
|
}
|
|
|
|
/* This function is for 3.5.2 (Add/subtract shifted register),
|
|
and 3.5.10 (Logical shifted register), for the vast majorty of cases
|
|
when we don't want to apply a shift. Thus it can also be used for
|
|
3.5.3 (Add/subtract with carry) and 3.5.8 (Data processing 2 source). */
|
|
static void tcg_out_insn_3502(TCGContext *s, AArch64Insn insn, TCGType ext,
|
|
TCGReg rd, TCGReg rn, TCGReg rm)
|
|
{
|
|
tcg_out32(s, insn | ext << 31 | rm << 16 | rn << 5 | rd);
|
|
}
|
|
|
|
#define tcg_out_insn_3503 tcg_out_insn_3502
|
|
#define tcg_out_insn_3508 tcg_out_insn_3502
|
|
#define tcg_out_insn_3510 tcg_out_insn_3502
|
|
|
|
|
|
static inline void tcg_out_ldst_9(TCGContext *s,
|
|
enum aarch64_ldst_op_data op_data,
|
|
enum aarch64_ldst_op_type op_type,
|
|
TCGReg rd, TCGReg rn, tcg_target_long offset)
|
|
{
|
|
/* use LDUR with BASE register with 9bit signed unscaled offset */
|
|
tcg_out32(s, op_data << 24 | op_type << 20
|
|
| (offset & 0x1ff) << 12 | rn << 5 | rd);
|
|
}
|
|
|
|
/* tcg_out_ldst_12 expects a scaled unsigned immediate offset */
|
|
static inline void tcg_out_ldst_12(TCGContext *s,
|
|
enum aarch64_ldst_op_data op_data,
|
|
enum aarch64_ldst_op_type op_type,
|
|
TCGReg rd, TCGReg rn,
|
|
tcg_target_ulong scaled_uimm)
|
|
{
|
|
tcg_out32(s, (op_data | 1) << 24
|
|
| op_type << 20 | scaled_uimm << 10 | rn << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_movr(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg src)
|
|
{
|
|
/* register to register move using MOV (shifted register with no shift) */
|
|
/* using MOV 0x2a0003e0 | (shift).. */
|
|
unsigned int base = ext ? 0xaa0003e0 : 0x2a0003e0;
|
|
tcg_out32(s, base | src << 16 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_movi_aux(TCGContext *s,
|
|
TCGReg rd, uint64_t value)
|
|
{
|
|
uint32_t half, base, shift, movk = 0;
|
|
/* construct halfwords of the immediate with MOVZ/MOVK with LSL */
|
|
/* using MOVZ 0x52800000 | extended reg.. */
|
|
base = (value > 0xffffffff) ? 0xd2800000 : 0x52800000;
|
|
/* count trailing zeros in 16 bit steps, mapping 64 to 0. Emit the
|
|
first MOVZ with the half-word immediate skipping the zeros, with a shift
|
|
(LSL) equal to this number. Then morph all next instructions into MOVKs.
|
|
Zero the processed half-word in the value, continue until empty.
|
|
We build the final result 16bits at a time with up to 4 instructions,
|
|
but do not emit instructions for 16bit zero holes. */
|
|
do {
|
|
shift = ctz64(value) & (63 & -16);
|
|
half = (value >> shift) & 0xffff;
|
|
tcg_out32(s, base | movk | shift << 17 | half << 5 | rd);
|
|
movk = 0x20000000; /* morph next MOVZs into MOVKs */
|
|
value &= ~(0xffffUL << shift);
|
|
} while (value);
|
|
}
|
|
|
|
static inline void tcg_out_movi(TCGContext *s, TCGType type,
|
|
TCGReg rd, tcg_target_long value)
|
|
{
|
|
if (type == TCG_TYPE_I64) {
|
|
tcg_out_movi_aux(s, rd, value);
|
|
} else {
|
|
tcg_out_movi_aux(s, rd, value & 0xffffffff);
|
|
}
|
|
}
|
|
|
|
static inline void tcg_out_ldst_r(TCGContext *s,
|
|
enum aarch64_ldst_op_data op_data,
|
|
enum aarch64_ldst_op_type op_type,
|
|
TCGReg rd, TCGReg base, TCGReg regoff)
|
|
{
|
|
/* load from memory to register using base + 64bit register offset */
|
|
/* using f.e. STR Wt, [Xn, Xm] 0xb8600800|(regoff << 16)|(base << 5)|rd */
|
|
/* the 0x6000 is for the "no extend field" */
|
|
tcg_out32(s, 0x00206800
|
|
| op_data << 24 | op_type << 20 | regoff << 16 | base << 5 | rd);
|
|
}
|
|
|
|
/* solve the whole ldst problem */
|
|
static inline void tcg_out_ldst(TCGContext *s, enum aarch64_ldst_op_data data,
|
|
enum aarch64_ldst_op_type type,
|
|
TCGReg rd, TCGReg rn, tcg_target_long offset)
|
|
{
|
|
if (offset >= -256 && offset < 256) {
|
|
tcg_out_ldst_9(s, data, type, rd, rn, offset);
|
|
return;
|
|
}
|
|
|
|
if (offset >= 256) {
|
|
/* if the offset is naturally aligned and in range,
|
|
then we can use the scaled uimm12 encoding */
|
|
unsigned int s_bits = data >> 6;
|
|
if (!(offset & ((1 << s_bits) - 1))) {
|
|
tcg_target_ulong scaled_uimm = offset >> s_bits;
|
|
if (scaled_uimm <= 0xfff) {
|
|
tcg_out_ldst_12(s, data, type, rd, rn, scaled_uimm);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* worst-case scenario, move offset to temp register, use reg offset */
|
|
tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP, offset);
|
|
tcg_out_ldst_r(s, data, type, rd, rn, TCG_REG_TMP);
|
|
}
|
|
|
|
/* mov alias implemented with add immediate, useful to move to/from SP */
|
|
static inline void tcg_out_movr_sp(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rn)
|
|
{
|
|
/* using ADD 0x11000000 | (ext) | rn << 5 | rd */
|
|
unsigned int base = ext ? 0x91000000 : 0x11000000;
|
|
tcg_out32(s, base | rn << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_mov(TCGContext *s,
|
|
TCGType type, TCGReg ret, TCGReg arg)
|
|
{
|
|
if (ret != arg) {
|
|
tcg_out_movr(s, type == TCG_TYPE_I64, ret, arg);
|
|
}
|
|
}
|
|
|
|
static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg,
|
|
TCGReg arg1, intptr_t arg2)
|
|
{
|
|
tcg_out_ldst(s, (type == TCG_TYPE_I64) ? LDST_64 : LDST_32, LDST_LD,
|
|
arg, arg1, arg2);
|
|
}
|
|
|
|
static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg,
|
|
TCGReg arg1, intptr_t arg2)
|
|
{
|
|
tcg_out_ldst(s, (type == TCG_TYPE_I64) ? LDST_64 : LDST_32, LDST_ST,
|
|
arg, arg1, arg2);
|
|
}
|
|
|
|
static inline void tcg_out_mul(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rn, TCGReg rm)
|
|
{
|
|
/* Using MADD 0x1b000000 with Ra = wzr alias MUL 0x1b007c00 */
|
|
unsigned int base = ext ? 0x9b007c00 : 0x1b007c00;
|
|
tcg_out32(s, base | rm << 16 | rn << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_ubfm(TCGContext *s, TCGType ext, TCGReg rd,
|
|
TCGReg rn, unsigned int a, unsigned int b)
|
|
{
|
|
/* Using UBFM 0x53000000 Wd, Wn, a, b */
|
|
unsigned int base = ext ? 0xd3400000 : 0x53000000;
|
|
tcg_out32(s, base | a << 16 | b << 10 | rn << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_sbfm(TCGContext *s, TCGType ext, TCGReg rd,
|
|
TCGReg rn, unsigned int a, unsigned int b)
|
|
{
|
|
/* Using SBFM 0x13000000 Wd, Wn, a, b */
|
|
unsigned int base = ext ? 0x93400000 : 0x13000000;
|
|
tcg_out32(s, base | a << 16 | b << 10 | rn << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_extr(TCGContext *s, TCGType ext, TCGReg rd,
|
|
TCGReg rn, TCGReg rm, unsigned int a)
|
|
{
|
|
/* Using EXTR 0x13800000 Wd, Wn, Wm, a */
|
|
unsigned int base = ext ? 0x93c00000 : 0x13800000;
|
|
tcg_out32(s, base | rm << 16 | a << 10 | rn << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_shl(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rn, unsigned int m)
|
|
{
|
|
int bits, max;
|
|
bits = ext ? 64 : 32;
|
|
max = bits - 1;
|
|
tcg_out_ubfm(s, ext, rd, rn, bits - (m & max), max - (m & max));
|
|
}
|
|
|
|
static inline void tcg_out_shr(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rn, unsigned int m)
|
|
{
|
|
int max = ext ? 63 : 31;
|
|
tcg_out_ubfm(s, ext, rd, rn, m & max, max);
|
|
}
|
|
|
|
static inline void tcg_out_sar(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rn, unsigned int m)
|
|
{
|
|
int max = ext ? 63 : 31;
|
|
tcg_out_sbfm(s, ext, rd, rn, m & max, max);
|
|
}
|
|
|
|
static inline void tcg_out_rotr(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rn, unsigned int m)
|
|
{
|
|
int max = ext ? 63 : 31;
|
|
tcg_out_extr(s, ext, rd, rn, rn, m & max);
|
|
}
|
|
|
|
static inline void tcg_out_rotl(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rn, unsigned int m)
|
|
{
|
|
int bits, max;
|
|
bits = ext ? 64 : 32;
|
|
max = bits - 1;
|
|
tcg_out_extr(s, ext, rd, rn, rn, bits - (m & max));
|
|
}
|
|
|
|
static void tcg_out_cmp(TCGContext *s, TCGType ext, TCGReg rn, TCGReg rm)
|
|
{
|
|
/* Using CMP alias SUBS wzr, Wn, Wm */
|
|
tcg_out_insn(s, 3502, SUBS, ext, TCG_REG_XZR, rn, rm);
|
|
}
|
|
|
|
static inline void tcg_out_cset(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGCond c)
|
|
{
|
|
/* Using CSET alias of CSINC 0x1a800400 Xd, XZR, XZR, invert(cond) */
|
|
unsigned int base = ext ? 0x9a9f07e0 : 0x1a9f07e0;
|
|
tcg_out32(s, base | tcg_cond_to_aarch64[tcg_invert_cond(c)] << 12 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_goto(TCGContext *s, intptr_t target)
|
|
{
|
|
intptr_t offset = (target - (intptr_t)s->code_ptr) / 4;
|
|
|
|
if (offset < -0x02000000 || offset >= 0x02000000) {
|
|
/* out of 26bit range */
|
|
tcg_abort();
|
|
}
|
|
|
|
tcg_out32(s, 0x14000000 | (offset & 0x03ffffff));
|
|
}
|
|
|
|
static inline void tcg_out_goto_noaddr(TCGContext *s)
|
|
{
|
|
/* We pay attention here to not modify the branch target by
|
|
reading from the buffer. This ensure that caches and memory are
|
|
kept coherent during retranslation.
|
|
Mask away possible garbage in the high bits for the first translation,
|
|
while keeping the offset bits for retranslation. */
|
|
uint32_t insn;
|
|
insn = (tcg_in32(s) & 0x03ffffff) | 0x14000000;
|
|
tcg_out32(s, insn);
|
|
}
|
|
|
|
static inline void tcg_out_goto_cond_noaddr(TCGContext *s, TCGCond c)
|
|
{
|
|
/* see comments in tcg_out_goto_noaddr */
|
|
uint32_t insn;
|
|
insn = tcg_in32(s) & (0x07ffff << 5);
|
|
insn |= 0x54000000 | tcg_cond_to_aarch64[c];
|
|
tcg_out32(s, insn);
|
|
}
|
|
|
|
static inline void tcg_out_goto_cond(TCGContext *s, TCGCond c, intptr_t target)
|
|
{
|
|
intptr_t offset = (target - (intptr_t)s->code_ptr) / 4;
|
|
|
|
if (offset < -0x40000 || offset >= 0x40000) {
|
|
/* out of 19bit range */
|
|
tcg_abort();
|
|
}
|
|
|
|
offset &= 0x7ffff;
|
|
tcg_out32(s, 0x54000000 | tcg_cond_to_aarch64[c] | offset << 5);
|
|
}
|
|
|
|
static inline void tcg_out_callr(TCGContext *s, TCGReg reg)
|
|
{
|
|
tcg_out32(s, 0xd63f0000 | reg << 5);
|
|
}
|
|
|
|
static inline void tcg_out_gotor(TCGContext *s, TCGReg reg)
|
|
{
|
|
tcg_out32(s, 0xd61f0000 | reg << 5);
|
|
}
|
|
|
|
static inline void tcg_out_call(TCGContext *s, intptr_t target)
|
|
{
|
|
intptr_t offset = (target - (intptr_t)s->code_ptr) / 4;
|
|
|
|
if (offset < -0x02000000 || offset >= 0x02000000) { /* out of 26bit rng */
|
|
tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP, target);
|
|
tcg_out_callr(s, TCG_REG_TMP);
|
|
} else {
|
|
tcg_out32(s, 0x94000000 | (offset & 0x03ffffff));
|
|
}
|
|
}
|
|
|
|
/* encode a logical immediate, mapping user parameter
|
|
M=set bits pattern length to S=M-1 */
|
|
static inline unsigned int
|
|
aarch64_limm(unsigned int m, unsigned int r)
|
|
{
|
|
assert(m > 0);
|
|
return r << 16 | (m - 1) << 10;
|
|
}
|
|
|
|
/* test a register against an immediate bit pattern made of
|
|
M set bits rotated right by R.
|
|
Examples:
|
|
to test a 32/64 reg against 0x00000007, pass M = 3, R = 0.
|
|
to test a 32/64 reg against 0x000000ff, pass M = 8, R = 0.
|
|
to test a 32bit reg against 0xff000000, pass M = 8, R = 8.
|
|
to test a 32bit reg against 0xff0000ff, pass M = 16, R = 8.
|
|
*/
|
|
static inline void tcg_out_tst(TCGContext *s, TCGType ext, TCGReg rn,
|
|
unsigned int m, unsigned int r)
|
|
{
|
|
/* using TST alias of ANDS XZR, Xn,#bimm64 0x7200001f */
|
|
unsigned int base = ext ? 0xf240001f : 0x7200001f;
|
|
tcg_out32(s, base | aarch64_limm(m, r) | rn << 5);
|
|
}
|
|
|
|
/* and a register with a bit pattern, similarly to TST, no flags change */
|
|
static inline void tcg_out_andi(TCGContext *s, TCGType ext, TCGReg rd,
|
|
TCGReg rn, unsigned int m, unsigned int r)
|
|
{
|
|
/* using AND 0x12000000 */
|
|
unsigned int base = ext ? 0x92400000 : 0x12000000;
|
|
tcg_out32(s, base | aarch64_limm(m, r) | rn << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_ret(TCGContext *s)
|
|
{
|
|
/* emit RET { LR } */
|
|
tcg_out32(s, 0xd65f03c0);
|
|
}
|
|
|
|
void aarch64_tb_set_jmp_target(uintptr_t jmp_addr, uintptr_t addr)
|
|
{
|
|
intptr_t target = addr;
|
|
intptr_t offset = (target - (intptr_t)jmp_addr) / 4;
|
|
|
|
if (offset < -0x02000000 || offset >= 0x02000000) {
|
|
/* out of 26bit range */
|
|
tcg_abort();
|
|
}
|
|
|
|
patch_reloc((uint8_t *)jmp_addr, R_AARCH64_JUMP26, target, 0);
|
|
flush_icache_range(jmp_addr, jmp_addr + 4);
|
|
}
|
|
|
|
static inline void tcg_out_goto_label(TCGContext *s, int label_index)
|
|
{
|
|
TCGLabel *l = &s->labels[label_index];
|
|
|
|
if (!l->has_value) {
|
|
tcg_out_reloc(s, s->code_ptr, R_AARCH64_JUMP26, label_index, 0);
|
|
tcg_out_goto_noaddr(s);
|
|
} else {
|
|
tcg_out_goto(s, l->u.value);
|
|
}
|
|
}
|
|
|
|
static inline void tcg_out_goto_label_cond(TCGContext *s,
|
|
TCGCond c, int label_index)
|
|
{
|
|
TCGLabel *l = &s->labels[label_index];
|
|
|
|
if (!l->has_value) {
|
|
tcg_out_reloc(s, s->code_ptr, R_AARCH64_CONDBR19, label_index, 0);
|
|
tcg_out_goto_cond_noaddr(s, c);
|
|
} else {
|
|
tcg_out_goto_cond(s, c, l->u.value);
|
|
}
|
|
}
|
|
|
|
static inline void tcg_out_rev(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rm)
|
|
{
|
|
/* using REV 0x5ac00800 */
|
|
unsigned int base = ext ? 0xdac00c00 : 0x5ac00800;
|
|
tcg_out32(s, base | rm << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_rev16(TCGContext *s, TCGType ext,
|
|
TCGReg rd, TCGReg rm)
|
|
{
|
|
/* using REV16 0x5ac00400 */
|
|
unsigned int base = ext ? 0xdac00400 : 0x5ac00400;
|
|
tcg_out32(s, base | rm << 5 | rd);
|
|
}
|
|
|
|
static inline void tcg_out_sxt(TCGContext *s, TCGType ext, int s_bits,
|
|
TCGReg rd, TCGReg rn)
|
|
{
|
|
/* using ALIASes SXTB 0x13001c00, SXTH 0x13003c00, SXTW 0x93407c00
|
|
of SBFM Xd, Xn, #0, #7|15|31 */
|
|
int bits = 8 * (1 << s_bits) - 1;
|
|
tcg_out_sbfm(s, ext, rd, rn, 0, bits);
|
|
}
|
|
|
|
static inline void tcg_out_uxt(TCGContext *s, int s_bits,
|
|
TCGReg rd, TCGReg rn)
|
|
{
|
|
/* using ALIASes UXTB 0x53001c00, UXTH 0x53003c00
|
|
of UBFM Wd, Wn, #0, #7|15 */
|
|
int bits = 8 * (1 << s_bits) - 1;
|
|
tcg_out_ubfm(s, 0, rd, rn, 0, bits);
|
|
}
|
|
|
|
#ifdef CONFIG_SOFTMMU
|
|
/* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr,
|
|
* int mmu_idx, uintptr_t ra)
|
|
*/
|
|
static const void * const qemu_ld_helpers[4] = {
|
|
helper_ret_ldub_mmu,
|
|
helper_ret_lduw_mmu,
|
|
helper_ret_ldul_mmu,
|
|
helper_ret_ldq_mmu,
|
|
};
|
|
|
|
/* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr,
|
|
* uintxx_t val, int mmu_idx, uintptr_t ra)
|
|
*/
|
|
static const void * const qemu_st_helpers[4] = {
|
|
helper_ret_stb_mmu,
|
|
helper_ret_stw_mmu,
|
|
helper_ret_stl_mmu,
|
|
helper_ret_stq_mmu,
|
|
};
|
|
|
|
static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
|
|
{
|
|
reloc_pc19(lb->label_ptr[0], (intptr_t)s->code_ptr);
|
|
|
|
tcg_out_movr(s, 1, TCG_REG_X0, TCG_AREG0);
|
|
tcg_out_movr(s, (TARGET_LONG_BITS == 64), TCG_REG_X1, lb->addrlo_reg);
|
|
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_X2, lb->mem_index);
|
|
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_X3, (tcg_target_long)lb->raddr);
|
|
tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP,
|
|
(tcg_target_long)qemu_ld_helpers[lb->opc & 3]);
|
|
tcg_out_callr(s, TCG_REG_TMP);
|
|
if (lb->opc & 0x04) {
|
|
tcg_out_sxt(s, 1, lb->opc & 3, lb->datalo_reg, TCG_REG_X0);
|
|
} else {
|
|
tcg_out_movr(s, 1, lb->datalo_reg, TCG_REG_X0);
|
|
}
|
|
|
|
tcg_out_goto(s, (intptr_t)lb->raddr);
|
|
}
|
|
|
|
static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
|
|
{
|
|
reloc_pc19(lb->label_ptr[0], (intptr_t)s->code_ptr);
|
|
|
|
tcg_out_movr(s, 1, TCG_REG_X0, TCG_AREG0);
|
|
tcg_out_movr(s, (TARGET_LONG_BITS == 64), TCG_REG_X1, lb->addrlo_reg);
|
|
tcg_out_movr(s, 1, TCG_REG_X2, lb->datalo_reg);
|
|
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_X3, lb->mem_index);
|
|
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_X4, (intptr_t)lb->raddr);
|
|
tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP,
|
|
(intptr_t)qemu_st_helpers[lb->opc & 3]);
|
|
tcg_out_callr(s, TCG_REG_TMP);
|
|
tcg_out_goto(s, (tcg_target_long)lb->raddr);
|
|
}
|
|
|
|
static void add_qemu_ldst_label(TCGContext *s, int is_ld, int opc,
|
|
TCGReg data_reg, TCGReg addr_reg,
|
|
int mem_index,
|
|
uint8_t *raddr, uint8_t *label_ptr)
|
|
{
|
|
TCGLabelQemuLdst *label = new_ldst_label(s);
|
|
|
|
label->is_ld = is_ld;
|
|
label->opc = opc;
|
|
label->datalo_reg = data_reg;
|
|
label->addrlo_reg = addr_reg;
|
|
label->mem_index = mem_index;
|
|
label->raddr = raddr;
|
|
label->label_ptr[0] = label_ptr;
|
|
}
|
|
|
|
/* Load and compare a TLB entry, emitting the conditional jump to the
|
|
slow path for the failure case, which will be patched later when finalizing
|
|
the slow path. Generated code returns the host addend in X1,
|
|
clobbers X0,X2,X3,TMP. */
|
|
static void tcg_out_tlb_read(TCGContext *s, TCGReg addr_reg,
|
|
int s_bits, uint8_t **label_ptr, int mem_index, int is_read)
|
|
{
|
|
TCGReg base = TCG_AREG0;
|
|
int tlb_offset = is_read ?
|
|
offsetof(CPUArchState, tlb_table[mem_index][0].addr_read)
|
|
: offsetof(CPUArchState, tlb_table[mem_index][0].addr_write);
|
|
/* Extract the TLB index from the address into X0.
|
|
X0<CPU_TLB_BITS:0> =
|
|
addr_reg<TARGET_PAGE_BITS+CPU_TLB_BITS:TARGET_PAGE_BITS> */
|
|
tcg_out_ubfm(s, (TARGET_LONG_BITS == 64), TCG_REG_X0, addr_reg,
|
|
TARGET_PAGE_BITS, TARGET_PAGE_BITS + CPU_TLB_BITS);
|
|
/* Store the page mask part of the address and the low s_bits into X3.
|
|
Later this allows checking for equality and alignment at the same time.
|
|
X3 = addr_reg & (PAGE_MASK | ((1 << s_bits) - 1)) */
|
|
tcg_out_andi(s, (TARGET_LONG_BITS == 64), TCG_REG_X3, addr_reg,
|
|
(TARGET_LONG_BITS - TARGET_PAGE_BITS) + s_bits,
|
|
(TARGET_LONG_BITS - TARGET_PAGE_BITS));
|
|
/* Add any "high bits" from the tlb offset to the env address into X2,
|
|
to take advantage of the LSL12 form of the ADDI instruction.
|
|
X2 = env + (tlb_offset & 0xfff000) */
|
|
tcg_out_insn(s, 3401, ADDI, TCG_TYPE_I64, TCG_REG_X2, base,
|
|
tlb_offset & 0xfff000);
|
|
/* Merge the tlb index contribution into X2.
|
|
X2 = X2 + (X0 << CPU_TLB_ENTRY_BITS) */
|
|
tcg_out_insn(s, 3502S, ADD_LSL, 1, TCG_REG_X2, TCG_REG_X2,
|
|
TCG_REG_X0, CPU_TLB_ENTRY_BITS);
|
|
/* Merge "low bits" from tlb offset, load the tlb comparator into X0.
|
|
X0 = load [X2 + (tlb_offset & 0x000fff)] */
|
|
tcg_out_ldst(s, TARGET_LONG_BITS == 64 ? LDST_64 : LDST_32,
|
|
LDST_LD, TCG_REG_X0, TCG_REG_X2,
|
|
(tlb_offset & 0xfff));
|
|
/* Load the tlb addend. Do that early to avoid stalling.
|
|
X1 = load [X2 + (tlb_offset & 0xfff) + offsetof(addend)] */
|
|
tcg_out_ldst(s, LDST_64, LDST_LD, TCG_REG_X1, TCG_REG_X2,
|
|
(tlb_offset & 0xfff) + (offsetof(CPUTLBEntry, addend)) -
|
|
(is_read ? offsetof(CPUTLBEntry, addr_read)
|
|
: offsetof(CPUTLBEntry, addr_write)));
|
|
/* Perform the address comparison. */
|
|
tcg_out_cmp(s, (TARGET_LONG_BITS == 64), TCG_REG_X0, TCG_REG_X3);
|
|
*label_ptr = s->code_ptr;
|
|
/* If not equal, we jump to the slow path. */
|
|
tcg_out_goto_cond_noaddr(s, TCG_COND_NE);
|
|
}
|
|
|
|
#endif /* CONFIG_SOFTMMU */
|
|
|
|
static void tcg_out_qemu_ld_direct(TCGContext *s, int opc, TCGReg data_r,
|
|
TCGReg addr_r, TCGReg off_r)
|
|
{
|
|
switch (opc) {
|
|
case 0:
|
|
tcg_out_ldst_r(s, LDST_8, LDST_LD, data_r, addr_r, off_r);
|
|
break;
|
|
case 0 | 4:
|
|
tcg_out_ldst_r(s, LDST_8, LDST_LD_S_X, data_r, addr_r, off_r);
|
|
break;
|
|
case 1:
|
|
tcg_out_ldst_r(s, LDST_16, LDST_LD, data_r, addr_r, off_r);
|
|
if (TCG_LDST_BSWAP) {
|
|
tcg_out_rev16(s, 0, data_r, data_r);
|
|
}
|
|
break;
|
|
case 1 | 4:
|
|
if (TCG_LDST_BSWAP) {
|
|
tcg_out_ldst_r(s, LDST_16, LDST_LD, data_r, addr_r, off_r);
|
|
tcg_out_rev16(s, 0, data_r, data_r);
|
|
tcg_out_sxt(s, 1, 1, data_r, data_r);
|
|
} else {
|
|
tcg_out_ldst_r(s, LDST_16, LDST_LD_S_X, data_r, addr_r, off_r);
|
|
}
|
|
break;
|
|
case 2:
|
|
tcg_out_ldst_r(s, LDST_32, LDST_LD, data_r, addr_r, off_r);
|
|
if (TCG_LDST_BSWAP) {
|
|
tcg_out_rev(s, 0, data_r, data_r);
|
|
}
|
|
break;
|
|
case 2 | 4:
|
|
if (TCG_LDST_BSWAP) {
|
|
tcg_out_ldst_r(s, LDST_32, LDST_LD, data_r, addr_r, off_r);
|
|
tcg_out_rev(s, 0, data_r, data_r);
|
|
tcg_out_sxt(s, 1, 2, data_r, data_r);
|
|
} else {
|
|
tcg_out_ldst_r(s, LDST_32, LDST_LD_S_X, data_r, addr_r, off_r);
|
|
}
|
|
break;
|
|
case 3:
|
|
tcg_out_ldst_r(s, LDST_64, LDST_LD, data_r, addr_r, off_r);
|
|
if (TCG_LDST_BSWAP) {
|
|
tcg_out_rev(s, 1, data_r, data_r);
|
|
}
|
|
break;
|
|
default:
|
|
tcg_abort();
|
|
}
|
|
}
|
|
|
|
static void tcg_out_qemu_st_direct(TCGContext *s, int opc, TCGReg data_r,
|
|
TCGReg addr_r, TCGReg off_r)
|
|
{
|
|
switch (opc) {
|
|
case 0:
|
|
tcg_out_ldst_r(s, LDST_8, LDST_ST, data_r, addr_r, off_r);
|
|
break;
|
|
case 1:
|
|
if (TCG_LDST_BSWAP) {
|
|
tcg_out_rev16(s, 0, TCG_REG_TMP, data_r);
|
|
tcg_out_ldst_r(s, LDST_16, LDST_ST, TCG_REG_TMP, addr_r, off_r);
|
|
} else {
|
|
tcg_out_ldst_r(s, LDST_16, LDST_ST, data_r, addr_r, off_r);
|
|
}
|
|
break;
|
|
case 2:
|
|
if (TCG_LDST_BSWAP) {
|
|
tcg_out_rev(s, 0, TCG_REG_TMP, data_r);
|
|
tcg_out_ldst_r(s, LDST_32, LDST_ST, TCG_REG_TMP, addr_r, off_r);
|
|
} else {
|
|
tcg_out_ldst_r(s, LDST_32, LDST_ST, data_r, addr_r, off_r);
|
|
}
|
|
break;
|
|
case 3:
|
|
if (TCG_LDST_BSWAP) {
|
|
tcg_out_rev(s, 1, TCG_REG_TMP, data_r);
|
|
tcg_out_ldst_r(s, LDST_64, LDST_ST, TCG_REG_TMP, addr_r, off_r);
|
|
} else {
|
|
tcg_out_ldst_r(s, LDST_64, LDST_ST, data_r, addr_r, off_r);
|
|
}
|
|
break;
|
|
default:
|
|
tcg_abort();
|
|
}
|
|
}
|
|
|
|
static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc)
|
|
{
|
|
TCGReg addr_reg, data_reg;
|
|
#ifdef CONFIG_SOFTMMU
|
|
int mem_index, s_bits;
|
|
uint8_t *label_ptr;
|
|
#endif
|
|
data_reg = args[0];
|
|
addr_reg = args[1];
|
|
|
|
#ifdef CONFIG_SOFTMMU
|
|
mem_index = args[2];
|
|
s_bits = opc & 3;
|
|
tcg_out_tlb_read(s, addr_reg, s_bits, &label_ptr, mem_index, 1);
|
|
tcg_out_qemu_ld_direct(s, opc, data_reg, addr_reg, TCG_REG_X1);
|
|
add_qemu_ldst_label(s, 1, opc, data_reg, addr_reg,
|
|
mem_index, s->code_ptr, label_ptr);
|
|
#else /* !CONFIG_SOFTMMU */
|
|
tcg_out_qemu_ld_direct(s, opc, data_reg, addr_reg,
|
|
GUEST_BASE ? TCG_REG_GUEST_BASE : TCG_REG_XZR);
|
|
#endif /* CONFIG_SOFTMMU */
|
|
}
|
|
|
|
static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
|
|
{
|
|
TCGReg addr_reg, data_reg;
|
|
#ifdef CONFIG_SOFTMMU
|
|
int mem_index, s_bits;
|
|
uint8_t *label_ptr;
|
|
#endif
|
|
data_reg = args[0];
|
|
addr_reg = args[1];
|
|
|
|
#ifdef CONFIG_SOFTMMU
|
|
mem_index = args[2];
|
|
s_bits = opc & 3;
|
|
|
|
tcg_out_tlb_read(s, addr_reg, s_bits, &label_ptr, mem_index, 0);
|
|
tcg_out_qemu_st_direct(s, opc, data_reg, addr_reg, TCG_REG_X1);
|
|
add_qemu_ldst_label(s, 0, opc, data_reg, addr_reg,
|
|
mem_index, s->code_ptr, label_ptr);
|
|
#else /* !CONFIG_SOFTMMU */
|
|
tcg_out_qemu_st_direct(s, opc, data_reg, addr_reg,
|
|
GUEST_BASE ? TCG_REG_GUEST_BASE : TCG_REG_XZR);
|
|
#endif /* CONFIG_SOFTMMU */
|
|
}
|
|
|
|
static uint8_t *tb_ret_addr;
|
|
|
|
/* callee stack use example:
|
|
stp x29, x30, [sp,#-32]!
|
|
mov x29, sp
|
|
stp x1, x2, [sp,#16]
|
|
...
|
|
ldp x1, x2, [sp,#16]
|
|
ldp x29, x30, [sp],#32
|
|
ret
|
|
*/
|
|
|
|
/* push r1 and r2, and alloc stack space for a total of
|
|
alloc_n elements (1 element=16 bytes, must be between 1 and 31. */
|
|
static inline void tcg_out_push_pair(TCGContext *s, TCGReg addr,
|
|
TCGReg r1, TCGReg r2, int alloc_n)
|
|
{
|
|
/* using indexed scaled simm7 STP 0x28800000 | (ext) | 0x01000000 (pre-idx)
|
|
| alloc_n * (-1) << 16 | r2 << 10 | addr << 5 | r1 */
|
|
assert(alloc_n > 0 && alloc_n < 0x20);
|
|
alloc_n = (-alloc_n) & 0x3f;
|
|
tcg_out32(s, 0xa9800000 | alloc_n << 16 | r2 << 10 | addr << 5 | r1);
|
|
}
|
|
|
|
/* dealloc stack space for a total of alloc_n elements and pop r1, r2. */
|
|
static inline void tcg_out_pop_pair(TCGContext *s, TCGReg addr,
|
|
TCGReg r1, TCGReg r2, int alloc_n)
|
|
{
|
|
/* using indexed scaled simm7 LDP 0x28c00000 | (ext) | nothing (post-idx)
|
|
| alloc_n << 16 | r2 << 10 | addr << 5 | r1 */
|
|
assert(alloc_n > 0 && alloc_n < 0x20);
|
|
tcg_out32(s, 0xa8c00000 | alloc_n << 16 | r2 << 10 | addr << 5 | r1);
|
|
}
|
|
|
|
static inline void tcg_out_store_pair(TCGContext *s, TCGReg addr,
|
|
TCGReg r1, TCGReg r2, int idx)
|
|
{
|
|
/* using register pair offset simm7 STP 0x29000000 | (ext)
|
|
| idx << 16 | r2 << 10 | addr << 5 | r1 */
|
|
assert(idx > 0 && idx < 0x20);
|
|
tcg_out32(s, 0xa9000000 | idx << 16 | r2 << 10 | addr << 5 | r1);
|
|
}
|
|
|
|
static inline void tcg_out_load_pair(TCGContext *s, TCGReg addr,
|
|
TCGReg r1, TCGReg r2, int idx)
|
|
{
|
|
/* using register pair offset simm7 LDP 0x29400000 | (ext)
|
|
| idx << 16 | r2 << 10 | addr << 5 | r1 */
|
|
assert(idx > 0 && idx < 0x20);
|
|
tcg_out32(s, 0xa9400000 | idx << 16 | r2 << 10 | addr << 5 | r1);
|
|
}
|
|
|
|
static void tcg_out_op(TCGContext *s, TCGOpcode opc,
|
|
const TCGArg args[TCG_MAX_OP_ARGS],
|
|
const int const_args[TCG_MAX_OP_ARGS])
|
|
{
|
|
/* 99% of the time, we can signal the use of extension registers
|
|
by looking to see if the opcode handles 64-bit data. */
|
|
TCGType ext = (tcg_op_defs[opc].flags & TCG_OPF_64BIT) != 0;
|
|
|
|
/* Hoist the loads of the most common arguments. */
|
|
TCGArg a0 = args[0];
|
|
TCGArg a1 = args[1];
|
|
TCGArg a2 = args[2];
|
|
int c2 = const_args[2];
|
|
|
|
switch (opc) {
|
|
case INDEX_op_exit_tb:
|
|
tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_X0, a0);
|
|
tcg_out_goto(s, (intptr_t)tb_ret_addr);
|
|
break;
|
|
|
|
case INDEX_op_goto_tb:
|
|
#ifndef USE_DIRECT_JUMP
|
|
#error "USE_DIRECT_JUMP required for aarch64"
|
|
#endif
|
|
assert(s->tb_jmp_offset != NULL); /* consistency for USE_DIRECT_JUMP */
|
|
s->tb_jmp_offset[a0] = s->code_ptr - s->code_buf;
|
|
/* actual branch destination will be patched by
|
|
aarch64_tb_set_jmp_target later, beware retranslation. */
|
|
tcg_out_goto_noaddr(s);
|
|
s->tb_next_offset[a0] = s->code_ptr - s->code_buf;
|
|
break;
|
|
|
|
case INDEX_op_call:
|
|
if (const_args[0]) {
|
|
tcg_out_call(s, a0);
|
|
} else {
|
|
tcg_out_callr(s, a0);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_br:
|
|
tcg_out_goto_label(s, a0);
|
|
break;
|
|
|
|
case INDEX_op_ld_i32:
|
|
case INDEX_op_ld_i64:
|
|
case INDEX_op_st_i32:
|
|
case INDEX_op_st_i64:
|
|
case INDEX_op_ld8u_i32:
|
|
case INDEX_op_ld8s_i32:
|
|
case INDEX_op_ld16u_i32:
|
|
case INDEX_op_ld16s_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_st8_i32:
|
|
case INDEX_op_st8_i64:
|
|
case INDEX_op_st16_i32:
|
|
case INDEX_op_st16_i64:
|
|
case INDEX_op_st32_i64:
|
|
tcg_out_ldst(s, aarch64_ldst_get_data(opc), aarch64_ldst_get_type(opc),
|
|
a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_add_i64:
|
|
case INDEX_op_add_i32:
|
|
tcg_out_insn(s, 3502, ADD, ext, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_sub_i64:
|
|
case INDEX_op_sub_i32:
|
|
tcg_out_insn(s, 3502, SUB, ext, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_and_i64:
|
|
case INDEX_op_and_i32:
|
|
tcg_out_insn(s, 3510, AND, ext, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_or_i64:
|
|
case INDEX_op_or_i32:
|
|
tcg_out_insn(s, 3510, ORR, ext, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_xor_i64:
|
|
case INDEX_op_xor_i32:
|
|
tcg_out_insn(s, 3510, EOR, ext, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_mul_i64:
|
|
case INDEX_op_mul_i32:
|
|
tcg_out_mul(s, ext, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_shl_i64:
|
|
case INDEX_op_shl_i32:
|
|
if (c2) {
|
|
tcg_out_shl(s, ext, a0, a1, a2);
|
|
} else {
|
|
tcg_out_insn(s, 3508, LSLV, ext, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_shr_i64:
|
|
case INDEX_op_shr_i32:
|
|
if (c2) {
|
|
tcg_out_shr(s, ext, a0, a1, a2);
|
|
} else {
|
|
tcg_out_insn(s, 3508, LSRV, ext, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_sar_i64:
|
|
case INDEX_op_sar_i32:
|
|
if (c2) {
|
|
tcg_out_sar(s, ext, a0, a1, a2);
|
|
} else {
|
|
tcg_out_insn(s, 3508, ASRV, ext, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_rotr_i64:
|
|
case INDEX_op_rotr_i32:
|
|
if (c2) {
|
|
tcg_out_rotr(s, ext, a0, a1, a2);
|
|
} else {
|
|
tcg_out_insn(s, 3508, RORV, ext, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_rotl_i64:
|
|
case INDEX_op_rotl_i32:
|
|
if (c2) {
|
|
tcg_out_rotl(s, ext, a0, a1, a2);
|
|
} else {
|
|
tcg_out_insn(s, 3502, SUB, 0, TCG_REG_TMP, TCG_REG_XZR, a2);
|
|
tcg_out_insn(s, 3508, RORV, ext, a0, a1, TCG_REG_TMP);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_brcond_i64:
|
|
case INDEX_op_brcond_i32:
|
|
tcg_out_cmp(s, ext, a0, a1);
|
|
tcg_out_goto_label_cond(s, a2, args[3]);
|
|
break;
|
|
|
|
case INDEX_op_setcond_i64:
|
|
case INDEX_op_setcond_i32:
|
|
tcg_out_cmp(s, ext, a1, a2);
|
|
tcg_out_cset(s, 0, a0, args[3]);
|
|
break;
|
|
|
|
case INDEX_op_qemu_ld8u:
|
|
tcg_out_qemu_ld(s, args, 0 | 0);
|
|
break;
|
|
case INDEX_op_qemu_ld8s:
|
|
tcg_out_qemu_ld(s, args, 4 | 0);
|
|
break;
|
|
case INDEX_op_qemu_ld16u:
|
|
tcg_out_qemu_ld(s, args, 0 | 1);
|
|
break;
|
|
case INDEX_op_qemu_ld16s:
|
|
tcg_out_qemu_ld(s, args, 4 | 1);
|
|
break;
|
|
case INDEX_op_qemu_ld32u:
|
|
tcg_out_qemu_ld(s, args, 0 | 2);
|
|
break;
|
|
case INDEX_op_qemu_ld32s:
|
|
tcg_out_qemu_ld(s, args, 4 | 2);
|
|
break;
|
|
case INDEX_op_qemu_ld32:
|
|
tcg_out_qemu_ld(s, args, 0 | 2);
|
|
break;
|
|
case INDEX_op_qemu_ld64:
|
|
tcg_out_qemu_ld(s, args, 0 | 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;
|
|
|
|
case INDEX_op_bswap32_i64:
|
|
/* Despite the _i64, this is a 32-bit bswap. */
|
|
ext = 0;
|
|
/* FALLTHRU */
|
|
case INDEX_op_bswap64_i64:
|
|
case INDEX_op_bswap32_i32:
|
|
tcg_out_rev(s, ext, a0, a1);
|
|
break;
|
|
case INDEX_op_bswap16_i64:
|
|
case INDEX_op_bswap16_i32:
|
|
tcg_out_rev16(s, 0, a0, a1);
|
|
break;
|
|
|
|
case INDEX_op_ext8s_i64:
|
|
case INDEX_op_ext8s_i32:
|
|
tcg_out_sxt(s, ext, 0, a0, a1);
|
|
break;
|
|
case INDEX_op_ext16s_i64:
|
|
case INDEX_op_ext16s_i32:
|
|
tcg_out_sxt(s, ext, 1, a0, a1);
|
|
break;
|
|
case INDEX_op_ext32s_i64:
|
|
tcg_out_sxt(s, 1, 2, a0, a1);
|
|
break;
|
|
case INDEX_op_ext8u_i64:
|
|
case INDEX_op_ext8u_i32:
|
|
tcg_out_uxt(s, 0, a0, a1);
|
|
break;
|
|
case INDEX_op_ext16u_i64:
|
|
case INDEX_op_ext16u_i32:
|
|
tcg_out_uxt(s, 1, a0, a1);
|
|
break;
|
|
case INDEX_op_ext32u_i64:
|
|
tcg_out_movr(s, 0, a0, a1);
|
|
break;
|
|
|
|
case INDEX_op_mov_i64:
|
|
case INDEX_op_mov_i32:
|
|
case INDEX_op_movi_i64:
|
|
case INDEX_op_movi_i32:
|
|
/* Always implemented with tcg_out_mov/i, never with tcg_out_op. */
|
|
default:
|
|
/* Opcode not implemented. */
|
|
tcg_abort();
|
|
}
|
|
}
|
|
|
|
static const TCGTargetOpDef aarch64_op_defs[] = {
|
|
{ INDEX_op_exit_tb, { } },
|
|
{ INDEX_op_goto_tb, { } },
|
|
{ INDEX_op_call, { "ri" } },
|
|
{ INDEX_op_br, { } },
|
|
|
|
{ INDEX_op_mov_i32, { "r", "r" } },
|
|
{ INDEX_op_mov_i64, { "r", "r" } },
|
|
|
|
{ INDEX_op_movi_i32, { "r" } },
|
|
{ INDEX_op_movi_i64, { "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_ld8u_i64, { "r", "r" } },
|
|
{ INDEX_op_ld8s_i64, { "r", "r" } },
|
|
{ INDEX_op_ld16u_i64, { "r", "r" } },
|
|
{ INDEX_op_ld16s_i64, { "r", "r" } },
|
|
{ INDEX_op_ld32u_i64, { "r", "r" } },
|
|
{ INDEX_op_ld32s_i64, { "r", "r" } },
|
|
{ INDEX_op_ld_i64, { "r", "r" } },
|
|
|
|
{ INDEX_op_st8_i32, { "r", "r" } },
|
|
{ INDEX_op_st16_i32, { "r", "r" } },
|
|
{ INDEX_op_st_i32, { "r", "r" } },
|
|
{ INDEX_op_st8_i64, { "r", "r" } },
|
|
{ INDEX_op_st16_i64, { "r", "r" } },
|
|
{ INDEX_op_st32_i64, { "r", "r" } },
|
|
{ INDEX_op_st_i64, { "r", "r" } },
|
|
|
|
{ INDEX_op_add_i32, { "r", "r", "r" } },
|
|
{ INDEX_op_add_i64, { "r", "r", "r" } },
|
|
{ INDEX_op_sub_i32, { "r", "r", "r" } },
|
|
{ INDEX_op_sub_i64, { "r", "r", "r" } },
|
|
{ INDEX_op_mul_i32, { "r", "r", "r" } },
|
|
{ INDEX_op_mul_i64, { "r", "r", "r" } },
|
|
{ INDEX_op_and_i32, { "r", "r", "r" } },
|
|
{ INDEX_op_and_i64, { "r", "r", "r" } },
|
|
{ INDEX_op_or_i32, { "r", "r", "r" } },
|
|
{ INDEX_op_or_i64, { "r", "r", "r" } },
|
|
{ INDEX_op_xor_i32, { "r", "r", "r" } },
|
|
{ INDEX_op_xor_i64, { "r", "r", "r" } },
|
|
|
|
{ INDEX_op_shl_i32, { "r", "r", "ri" } },
|
|
{ INDEX_op_shr_i32, { "r", "r", "ri" } },
|
|
{ INDEX_op_sar_i32, { "r", "r", "ri" } },
|
|
{ INDEX_op_rotl_i32, { "r", "r", "ri" } },
|
|
{ INDEX_op_rotr_i32, { "r", "r", "ri" } },
|
|
{ INDEX_op_shl_i64, { "r", "r", "ri" } },
|
|
{ INDEX_op_shr_i64, { "r", "r", "ri" } },
|
|
{ INDEX_op_sar_i64, { "r", "r", "ri" } },
|
|
{ INDEX_op_rotl_i64, { "r", "r", "ri" } },
|
|
{ INDEX_op_rotr_i64, { "r", "r", "ri" } },
|
|
|
|
{ INDEX_op_brcond_i32, { "r", "r" } },
|
|
{ INDEX_op_setcond_i32, { "r", "r", "r" } },
|
|
{ INDEX_op_brcond_i64, { "r", "r" } },
|
|
{ INDEX_op_setcond_i64, { "r", "r", "r" } },
|
|
|
|
{ INDEX_op_qemu_ld8u, { "r", "l" } },
|
|
{ INDEX_op_qemu_ld8s, { "r", "l" } },
|
|
{ INDEX_op_qemu_ld16u, { "r", "l" } },
|
|
{ INDEX_op_qemu_ld16s, { "r", "l" } },
|
|
{ INDEX_op_qemu_ld32u, { "r", "l" } },
|
|
{ INDEX_op_qemu_ld32s, { "r", "l" } },
|
|
|
|
{ INDEX_op_qemu_ld32, { "r", "l" } },
|
|
{ INDEX_op_qemu_ld64, { "r", "l" } },
|
|
|
|
{ INDEX_op_qemu_st8, { "l", "l" } },
|
|
{ INDEX_op_qemu_st16, { "l", "l" } },
|
|
{ INDEX_op_qemu_st32, { "l", "l" } },
|
|
{ INDEX_op_qemu_st64, { "l", "l" } },
|
|
|
|
{ INDEX_op_bswap16_i32, { "r", "r" } },
|
|
{ INDEX_op_bswap32_i32, { "r", "r" } },
|
|
{ INDEX_op_bswap16_i64, { "r", "r" } },
|
|
{ INDEX_op_bswap32_i64, { "r", "r" } },
|
|
{ INDEX_op_bswap64_i64, { "r", "r" } },
|
|
|
|
{ INDEX_op_ext8s_i32, { "r", "r" } },
|
|
{ INDEX_op_ext16s_i32, { "r", "r" } },
|
|
{ INDEX_op_ext8u_i32, { "r", "r" } },
|
|
{ INDEX_op_ext16u_i32, { "r", "r" } },
|
|
|
|
{ INDEX_op_ext8s_i64, { "r", "r" } },
|
|
{ INDEX_op_ext16s_i64, { "r", "r" } },
|
|
{ INDEX_op_ext32s_i64, { "r", "r" } },
|
|
{ INDEX_op_ext8u_i64, { "r", "r" } },
|
|
{ INDEX_op_ext16u_i64, { "r", "r" } },
|
|
{ INDEX_op_ext32u_i64, { "r", "r" } },
|
|
|
|
{ -1 },
|
|
};
|
|
|
|
static void tcg_target_init(TCGContext *s)
|
|
{
|
|
tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
|
|
tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);
|
|
|
|
tcg_regset_set32(tcg_target_call_clobber_regs, 0,
|
|
(1 << TCG_REG_X0) | (1 << TCG_REG_X1) |
|
|
(1 << TCG_REG_X2) | (1 << TCG_REG_X3) |
|
|
(1 << TCG_REG_X4) | (1 << TCG_REG_X5) |
|
|
(1 << TCG_REG_X6) | (1 << TCG_REG_X7) |
|
|
(1 << TCG_REG_X8) | (1 << TCG_REG_X9) |
|
|
(1 << TCG_REG_X10) | (1 << TCG_REG_X11) |
|
|
(1 << TCG_REG_X12) | (1 << TCG_REG_X13) |
|
|
(1 << TCG_REG_X14) | (1 << TCG_REG_X15) |
|
|
(1 << TCG_REG_X16) | (1 << TCG_REG_X17) |
|
|
(1 << TCG_REG_X18));
|
|
|
|
tcg_regset_clear(s->reserved_regs);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_FP);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_X18); /* platform register */
|
|
|
|
tcg_add_target_add_op_defs(aarch64_op_defs);
|
|
}
|
|
|
|
static void tcg_target_qemu_prologue(TCGContext *s)
|
|
{
|
|
/* NB: frame sizes are in 16 byte stack units! */
|
|
int frame_size_callee_saved, frame_size_tcg_locals;
|
|
TCGReg r;
|
|
|
|
/* save pairs (FP, LR) and (X19, X20) .. (X27, X28) */
|
|
frame_size_callee_saved = (1) + (TCG_REG_X28 - TCG_REG_X19) / 2 + 1;
|
|
|
|
/* frame size requirement for TCG local variables */
|
|
frame_size_tcg_locals = TCG_STATIC_CALL_ARGS_SIZE
|
|
+ CPU_TEMP_BUF_NLONGS * sizeof(long)
|
|
+ (TCG_TARGET_STACK_ALIGN - 1);
|
|
frame_size_tcg_locals &= ~(TCG_TARGET_STACK_ALIGN - 1);
|
|
frame_size_tcg_locals /= TCG_TARGET_STACK_ALIGN;
|
|
|
|
/* push (FP, LR) and update sp */
|
|
tcg_out_push_pair(s, TCG_REG_SP,
|
|
TCG_REG_FP, TCG_REG_LR, frame_size_callee_saved);
|
|
|
|
/* FP -> callee_saved */
|
|
tcg_out_movr_sp(s, 1, TCG_REG_FP, TCG_REG_SP);
|
|
|
|
/* store callee-preserved regs x19..x28 using FP -> callee_saved */
|
|
for (r = TCG_REG_X19; r <= TCG_REG_X27; r += 2) {
|
|
int idx = (r - TCG_REG_X19) / 2 + 1;
|
|
tcg_out_store_pair(s, TCG_REG_FP, r, r + 1, idx);
|
|
}
|
|
|
|
/* Make stack space for TCG locals. */
|
|
tcg_out_insn(s, 3401, SUBI, TCG_TYPE_I64, TCG_REG_SP, TCG_REG_SP,
|
|
frame_size_tcg_locals * TCG_TARGET_STACK_ALIGN);
|
|
|
|
/* inform TCG about how to find TCG locals with register, offset, size */
|
|
tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE,
|
|
CPU_TEMP_BUF_NLONGS * sizeof(long));
|
|
|
|
#if defined(CONFIG_USE_GUEST_BASE)
|
|
if (GUEST_BASE) {
|
|
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_GUEST_BASE, GUEST_BASE);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_GUEST_BASE);
|
|
}
|
|
#endif
|
|
|
|
tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
|
|
tcg_out_gotor(s, tcg_target_call_iarg_regs[1]);
|
|
|
|
tb_ret_addr = s->code_ptr;
|
|
|
|
/* Remove TCG locals stack space. */
|
|
tcg_out_insn(s, 3401, ADDI, TCG_TYPE_I64, TCG_REG_SP, TCG_REG_SP,
|
|
frame_size_tcg_locals * TCG_TARGET_STACK_ALIGN);
|
|
|
|
/* restore registers x19..x28.
|
|
FP must be preserved, so it still points to callee_saved area */
|
|
for (r = TCG_REG_X19; r <= TCG_REG_X27; r += 2) {
|
|
int idx = (r - TCG_REG_X19) / 2 + 1;
|
|
tcg_out_load_pair(s, TCG_REG_FP, r, r + 1, idx);
|
|
}
|
|
|
|
/* pop (FP, LR), restore SP to previous frame, return */
|
|
tcg_out_pop_pair(s, TCG_REG_SP,
|
|
TCG_REG_FP, TCG_REG_LR, frame_size_callee_saved);
|
|
tcg_out_ret(s);
|
|
}
|