/
tcg-target.c.inc
2975 lines (2652 loc) · 93.8 KB
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tcg-target.c.inc
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/*
* 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-pool.c.inc"
#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);
#ifdef CONFIG_DEBUG_TCG
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", "x30", "sp",
"v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15",
"v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23",
"v24", "v25", "v26", "v27", "v28", "fp", "v30", "v31",
};
#endif /* CONFIG_DEBUG_TCG */
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_X8, 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_X0, TCG_REG_X1, TCG_REG_X2, TCG_REG_X3,
TCG_REG_X4, TCG_REG_X5, TCG_REG_X6, TCG_REG_X7,
/* X18 reserved by system */
/* X19 reserved for AREG0 */
/* X29 reserved as fp */
/* X30 reserved as temporary */
TCG_REG_V0, TCG_REG_V1, TCG_REG_V2, TCG_REG_V3,
TCG_REG_V4, TCG_REG_V5, TCG_REG_V6, TCG_REG_V7,
/* V8 - V15 are call-saved, and skipped. */
TCG_REG_V16, TCG_REG_V17, TCG_REG_V18, TCG_REG_V19,
TCG_REG_V20, TCG_REG_V21, TCG_REG_V22, TCG_REG_V23,
TCG_REG_V24, TCG_REG_V25, TCG_REG_V26, TCG_REG_V27,
TCG_REG_V28, TCG_REG_V29, TCG_REG_V30, TCG_REG_V31,
};
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_X30
#define TCG_VEC_TMP TCG_REG_V31
#ifndef CONFIG_SOFTMMU
/* Note that XZR cannot be encoded in the address base register slot,
as that actaully encodes SP. So if we need to zero-extend the guest
address, via the address index register slot, we need to load even
a zero guest base into a register. */
#define USE_GUEST_BASE (guest_base != 0 || TARGET_LONG_BITS == 32)
#define TCG_REG_GUEST_BASE TCG_REG_X28
#endif
static bool reloc_pc26(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
{
const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
ptrdiff_t offset = target - src_rx;
if (offset == sextract64(offset, 0, 26)) {
/* read instruction, mask away previous PC_REL26 parameter contents,
set the proper offset, then write back the instruction. */
*src_rw = deposit32(*src_rw, 0, 26, offset);
return true;
}
return false;
}
static bool reloc_pc19(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
{
const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
ptrdiff_t offset = target - src_rx;
if (offset == sextract64(offset, 0, 19)) {
*src_rw = deposit32(*src_rw, 5, 19, offset);
return true;
}
return false;
}
static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
intptr_t value, intptr_t addend)
{
tcg_debug_assert(addend == 0);
switch (type) {
case R_AARCH64_JUMP26:
case R_AARCH64_CALL26:
return reloc_pc26(code_ptr, (const tcg_insn_unit *)value);
case R_AARCH64_CONDBR19:
return reloc_pc19(code_ptr, (const tcg_insn_unit *)value);
default:
g_assert_not_reached();
}
}
#define TCG_CT_CONST_AIMM 0x100
#define TCG_CT_CONST_LIMM 0x200
#define TCG_CT_CONST_ZERO 0x400
#define TCG_CT_CONST_MONE 0x800
#define TCG_CT_CONST_ORRI 0x1000
#define TCG_CT_CONST_ANDI 0x2000
/* parse target specific constraints */
static const char *target_parse_constraint(TCGArgConstraint *ct,
const char *ct_str, TCGType type)
{
switch (*ct_str++) {
case 'r': /* general registers */
ct->regs |= 0xffffffffu;
break;
case 'w': /* advsimd registers */
ct->regs |= 0xffffffff00000000ull;
break;
case 'l': /* qemu_ld / qemu_st address, data_reg */
ct->regs = 0xffffffffu;
#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->regs, TCG_REG_X0);
tcg_regset_reset_reg(ct->regs, TCG_REG_X1);
tcg_regset_reset_reg(ct->regs, TCG_REG_X2);
tcg_regset_reset_reg(ct->regs, TCG_REG_X3);
#endif
break;
case 'A': /* Valid for arithmetic immediate (positive or negative). */
ct->ct |= TCG_CT_CONST_AIMM;
break;
case 'L': /* Valid for logical immediate. */
ct->ct |= TCG_CT_CONST_LIMM;
break;
case 'M': /* minus one */
ct->ct |= TCG_CT_CONST_MONE;
break;
case 'O': /* vector orr/bic immediate */
ct->ct |= TCG_CT_CONST_ORRI;
break;
case 'N': /* vector orr/bic immediate, inverted */
ct->ct |= TCG_CT_CONST_ANDI;
break;
case 'Z': /* zero */
ct->ct |= TCG_CT_CONST_ZERO;
break;
default:
return NULL;
}
return ct_str;
}
/* Match a constant valid for addition (12-bit, optionally shifted). */
static inline bool is_aimm(uint64_t val)
{
return (val & ~0xfff) == 0 || (val & ~0xfff000) == 0;
}
/* Match a constant valid for logical operations. */
static inline bool is_limm(uint64_t val)
{
/* Taking a simplified view of the logical immediates for now, ignoring
the replication that can happen across the field. Match bit patterns
of the forms
0....01....1
0..01..10..0
and their inverses. */
/* Make things easier below, by testing the form with msb clear. */
if ((int64_t)val < 0) {
val = ~val;
}
if (val == 0) {
return false;
}
val += val & -val;
return (val & (val - 1)) == 0;
}
/* Return true if v16 is a valid 16-bit shifted immediate. */
static bool is_shimm16(uint16_t v16, int *cmode, int *imm8)
{
if (v16 == (v16 & 0xff)) {
*cmode = 0x8;
*imm8 = v16 & 0xff;
return true;
} else if (v16 == (v16 & 0xff00)) {
*cmode = 0xa;
*imm8 = v16 >> 8;
return true;
}
return false;
}
/* Return true if v32 is a valid 32-bit shifted immediate. */
static bool is_shimm32(uint32_t v32, int *cmode, int *imm8)
{
if (v32 == (v32 & 0xff)) {
*cmode = 0x0;
*imm8 = v32 & 0xff;
return true;
} else if (v32 == (v32 & 0xff00)) {
*cmode = 0x2;
*imm8 = (v32 >> 8) & 0xff;
return true;
} else if (v32 == (v32 & 0xff0000)) {
*cmode = 0x4;
*imm8 = (v32 >> 16) & 0xff;
return true;
} else if (v32 == (v32 & 0xff000000)) {
*cmode = 0x6;
*imm8 = v32 >> 24;
return true;
}
return false;
}
/* Return true if v32 is a valid 32-bit shifting ones immediate. */
static bool is_soimm32(uint32_t v32, int *cmode, int *imm8)
{
if ((v32 & 0xffff00ff) == 0xff) {
*cmode = 0xc;
*imm8 = (v32 >> 8) & 0xff;
return true;
} else if ((v32 & 0xff00ffff) == 0xffff) {
*cmode = 0xd;
*imm8 = (v32 >> 16) & 0xff;
return true;
}
return false;
}
/* Return true if v32 is a valid float32 immediate. */
static bool is_fimm32(uint32_t v32, int *cmode, int *imm8)
{
if (extract32(v32, 0, 19) == 0
&& (extract32(v32, 25, 6) == 0x20
|| extract32(v32, 25, 6) == 0x1f)) {
*cmode = 0xf;
*imm8 = (extract32(v32, 31, 1) << 7)
| (extract32(v32, 25, 1) << 6)
| extract32(v32, 19, 6);
return true;
}
return false;
}
/* Return true if v64 is a valid float64 immediate. */
static bool is_fimm64(uint64_t v64, int *cmode, int *imm8)
{
if (extract64(v64, 0, 48) == 0
&& (extract64(v64, 54, 9) == 0x100
|| extract64(v64, 54, 9) == 0x0ff)) {
*cmode = 0xf;
*imm8 = (extract64(v64, 63, 1) << 7)
| (extract64(v64, 54, 1) << 6)
| extract64(v64, 48, 6);
return true;
}
return false;
}
/*
* Return non-zero if v32 can be formed by MOVI+ORR.
* Place the parameters for MOVI in (cmode, imm8).
* Return the cmode for ORR; the imm8 can be had via extraction from v32.
*/
static int is_shimm32_pair(uint32_t v32, int *cmode, int *imm8)
{
int i;
for (i = 6; i > 0; i -= 2) {
/* Mask out one byte we can add with ORR. */
uint32_t tmp = v32 & ~(0xffu << (i * 4));
if (is_shimm32(tmp, cmode, imm8) ||
is_soimm32(tmp, cmode, imm8)) {
break;
}
}
return i;
}
/* Return true if V is a valid 16-bit or 32-bit shifted immediate. */
static bool is_shimm1632(uint32_t v32, int *cmode, int *imm8)
{
if (v32 == deposit32(v32, 16, 16, v32)) {
return is_shimm16(v32, cmode, imm8);
} else {
return is_shimm32(v32, cmode, imm8);
}
}
static int tcg_target_const_match(tcg_target_long val, TCGType type,
const TCGArgConstraint *arg_ct)
{
int ct = arg_ct->ct;
if (ct & TCG_CT_CONST) {
return 1;
}
if (type == TCG_TYPE_I32) {
val = (int32_t)val;
}
if ((ct & TCG_CT_CONST_AIMM) && (is_aimm(val) || is_aimm(-val))) {
return 1;
}
if ((ct & TCG_CT_CONST_LIMM) && is_limm(val)) {
return 1;
}
if ((ct & TCG_CT_CONST_ZERO) && val == 0) {
return 1;
}
if ((ct & TCG_CT_CONST_MONE) && val == -1) {
return 1;
}
switch (ct & (TCG_CT_CONST_ORRI | TCG_CT_CONST_ANDI)) {
case 0:
break;
case TCG_CT_CONST_ANDI:
val = ~val;
/* fallthru */
case TCG_CT_CONST_ORRI:
if (val == deposit64(val, 32, 32, val)) {
int cmode, imm8;
return is_shimm1632(val, &cmode, &imm8);
}
break;
default:
/* Both bits should not be set for the same insn. */
g_assert_not_reached();
}
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,
};
typedef enum {
LDST_ST = 0, /* store */
LDST_LD = 1, /* load */
LDST_LD_S_X = 2, /* load and sign-extend into Xt */
LDST_LD_S_W = 3, /* load and sign-extend into Wt */
} AArch64LdstType;
/* 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 {
/* Compare and branch (immediate). */
I3201_CBZ = 0x34000000,
I3201_CBNZ = 0x35000000,
/* Conditional branch (immediate). */
I3202_B_C = 0x54000000,
/* Unconditional branch (immediate). */
I3206_B = 0x14000000,
I3206_BL = 0x94000000,
/* Unconditional branch (register). */
I3207_BR = 0xd61f0000,
I3207_BLR = 0xd63f0000,
I3207_RET = 0xd65f0000,
/* AdvSIMD load/store single structure. */
I3303_LD1R = 0x0d40c000,
/* Load literal for loading the address at pc-relative offset */
I3305_LDR = 0x58000000,
I3305_LDR_v64 = 0x5c000000,
I3305_LDR_v128 = 0x9c000000,
/* Load/store register. Described here as 3.3.12, but the helper
that emits them can transform to 3.3.10 or 3.3.13. */
I3312_STRB = 0x38000000 | LDST_ST << 22 | MO_8 << 30,
I3312_STRH = 0x38000000 | LDST_ST << 22 | MO_16 << 30,
I3312_STRW = 0x38000000 | LDST_ST << 22 | MO_32 << 30,
I3312_STRX = 0x38000000 | LDST_ST << 22 | MO_64 << 30,
I3312_LDRB = 0x38000000 | LDST_LD << 22 | MO_8 << 30,
I3312_LDRH = 0x38000000 | LDST_LD << 22 | MO_16 << 30,
I3312_LDRW = 0x38000000 | LDST_LD << 22 | MO_32 << 30,
I3312_LDRX = 0x38000000 | LDST_LD << 22 | MO_64 << 30,
I3312_LDRSBW = 0x38000000 | LDST_LD_S_W << 22 | MO_8 << 30,
I3312_LDRSHW = 0x38000000 | LDST_LD_S_W << 22 | MO_16 << 30,
I3312_LDRSBX = 0x38000000 | LDST_LD_S_X << 22 | MO_8 << 30,
I3312_LDRSHX = 0x38000000 | LDST_LD_S_X << 22 | MO_16 << 30,
I3312_LDRSWX = 0x38000000 | LDST_LD_S_X << 22 | MO_32 << 30,
I3312_LDRVS = 0x3c000000 | LDST_LD << 22 | MO_32 << 30,
I3312_STRVS = 0x3c000000 | LDST_ST << 22 | MO_32 << 30,
I3312_LDRVD = 0x3c000000 | LDST_LD << 22 | MO_64 << 30,
I3312_STRVD = 0x3c000000 | LDST_ST << 22 | MO_64 << 30,
I3312_LDRVQ = 0x3c000000 | 3 << 22 | 0 << 30,
I3312_STRVQ = 0x3c000000 | 2 << 22 | 0 << 30,
I3312_TO_I3310 = 0x00200800,
I3312_TO_I3313 = 0x01000000,
/* Load/store register pair instructions. */
I3314_LDP = 0x28400000,
I3314_STP = 0x28000000,
/* Add/subtract immediate instructions. */
I3401_ADDI = 0x11000000,
I3401_ADDSI = 0x31000000,
I3401_SUBI = 0x51000000,
I3401_SUBSI = 0x71000000,
/* Bitfield instructions. */
I3402_BFM = 0x33000000,
I3402_SBFM = 0x13000000,
I3402_UBFM = 0x53000000,
/* Extract instruction. */
I3403_EXTR = 0x13800000,
/* Logical immediate instructions. */
I3404_ANDI = 0x12000000,
I3404_ORRI = 0x32000000,
I3404_EORI = 0x52000000,
/* Move wide immediate instructions. */
I3405_MOVN = 0x12800000,
I3405_MOVZ = 0x52800000,
I3405_MOVK = 0x72800000,
/* PC relative addressing instructions. */
I3406_ADR = 0x10000000,
I3406_ADRP = 0x90000000,
/* 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,
/* Add/subtract with carry instructions. */
I3503_ADC = 0x1a000000,
I3503_SBC = 0x5a000000,
/* Conditional select instructions. */
I3506_CSEL = 0x1a800000,
I3506_CSINC = 0x1a800400,
I3506_CSINV = 0x5a800000,
I3506_CSNEG = 0x5a800400,
/* Data-processing (1 source) instructions. */
I3507_CLZ = 0x5ac01000,
I3507_RBIT = 0x5ac00000,
I3507_REV16 = 0x5ac00400,
I3507_REV32 = 0x5ac00800,
I3507_REV64 = 0x5ac00c00,
/* Data-processing (2 source) instructions. */
I3508_LSLV = 0x1ac02000,
I3508_LSRV = 0x1ac02400,
I3508_ASRV = 0x1ac02800,
I3508_RORV = 0x1ac02c00,
I3508_SMULH = 0x9b407c00,
I3508_UMULH = 0x9bc07c00,
I3508_UDIV = 0x1ac00800,
I3508_SDIV = 0x1ac00c00,
/* Data-processing (3 source) instructions. */
I3509_MADD = 0x1b000000,
I3509_MSUB = 0x1b008000,
/* Logical shifted register instructions (without a shift). */
I3510_AND = 0x0a000000,
I3510_BIC = 0x0a200000,
I3510_ORR = 0x2a000000,
I3510_ORN = 0x2a200000,
I3510_EOR = 0x4a000000,
I3510_EON = 0x4a200000,
I3510_ANDS = 0x6a000000,
/* Logical shifted register instructions (with a shift). */
I3502S_AND_LSR = I3510_AND | (1 << 22),
/* AdvSIMD copy */
I3605_DUP = 0x0e000400,
I3605_INS = 0x4e001c00,
I3605_UMOV = 0x0e003c00,
/* AdvSIMD modified immediate */
I3606_MOVI = 0x0f000400,
I3606_MVNI = 0x2f000400,
I3606_BIC = 0x2f001400,
I3606_ORR = 0x0f001400,
/* AdvSIMD shift by immediate */
I3614_SSHR = 0x0f000400,
I3614_SSRA = 0x0f001400,
I3614_SHL = 0x0f005400,
I3614_SLI = 0x2f005400,
I3614_USHR = 0x2f000400,
I3614_USRA = 0x2f001400,
/* AdvSIMD three same. */
I3616_ADD = 0x0e208400,
I3616_AND = 0x0e201c00,
I3616_BIC = 0x0e601c00,
I3616_BIF = 0x2ee01c00,
I3616_BIT = 0x2ea01c00,
I3616_BSL = 0x2e601c00,
I3616_EOR = 0x2e201c00,
I3616_MUL = 0x0e209c00,
I3616_ORR = 0x0ea01c00,
I3616_ORN = 0x0ee01c00,
I3616_SUB = 0x2e208400,
I3616_CMGT = 0x0e203400,
I3616_CMGE = 0x0e203c00,
I3616_CMTST = 0x0e208c00,
I3616_CMHI = 0x2e203400,
I3616_CMHS = 0x2e203c00,
I3616_CMEQ = 0x2e208c00,
I3616_SMAX = 0x0e206400,
I3616_SMIN = 0x0e206c00,
I3616_SSHL = 0x0e204400,
I3616_SQADD = 0x0e200c00,
I3616_SQSUB = 0x0e202c00,
I3616_UMAX = 0x2e206400,
I3616_UMIN = 0x2e206c00,
I3616_UQADD = 0x2e200c00,
I3616_UQSUB = 0x2e202c00,
I3616_USHL = 0x2e204400,
/* AdvSIMD two-reg misc. */
I3617_CMGT0 = 0x0e208800,
I3617_CMEQ0 = 0x0e209800,
I3617_CMLT0 = 0x0e20a800,
I3617_CMGE0 = 0x2e208800,
I3617_CMLE0 = 0x2e20a800,
I3617_NOT = 0x2e205800,
I3617_ABS = 0x0e20b800,
I3617_NEG = 0x2e20b800,
/* System instructions. */
NOP = 0xd503201f,
DMB_ISH = 0xd50338bf,
DMB_LD = 0x00000100,
DMB_ST = 0x00000200,
} AArch64Insn;
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_3303(TCGContext *s, AArch64Insn insn, bool q,
TCGReg rt, TCGReg rn, unsigned size)
{
tcg_out32(s, insn | (rt & 0x1f) | (rn << 5) | (size << 10) | (q << 30));
}
static void tcg_out_insn_3305(TCGContext *s, AArch64Insn insn,
int imm19, TCGReg rt)
{
tcg_out32(s, insn | (imm19 & 0x7ffff) << 5 | rt);
}
static void tcg_out_insn_3201(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rt, int imm19)
{
tcg_out32(s, insn | ext << 31 | (imm19 & 0x7ffff) << 5 | rt);
}
static void tcg_out_insn_3202(TCGContext *s, AArch64Insn insn,
TCGCond c, int imm19)
{
tcg_out32(s, insn | tcg_cond_to_aarch64[c] | (imm19 & 0x7ffff) << 5);
}
static void tcg_out_insn_3206(TCGContext *s, AArch64Insn insn, int imm26)
{
tcg_out32(s, insn | (imm26 & 0x03ffffff));
}
static void tcg_out_insn_3207(TCGContext *s, AArch64Insn insn, TCGReg rn)
{
tcg_out32(s, insn | rn << 5);
}
static void tcg_out_insn_3314(TCGContext *s, AArch64Insn insn,
TCGReg r1, TCGReg r2, TCGReg rn,
tcg_target_long ofs, bool pre, bool w)
{
insn |= 1u << 31; /* ext */
insn |= pre << 24;
insn |= w << 23;
tcg_debug_assert(ofs >= -0x200 && ofs < 0x200 && (ofs & 7) == 0);
insn |= (ofs & (0x7f << 3)) << (15 - 3);
tcg_out32(s, insn | r2 << 10 | rn << 5 | r1);
}
static void tcg_out_insn_3401(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, TCGReg rn, uint64_t aimm)
{
if (aimm > 0xfff) {
tcg_debug_assert((aimm & 0xfff) == 0);
aimm >>= 12;
tcg_debug_assert(aimm <= 0xfff);
aimm |= 1 << 12; /* apply LSL 12 */
}
tcg_out32(s, insn | ext << 31 | aimm << 10 | rn << 5 | rd);
}
/* This function can be used for both 3.4.2 (Bitfield) and 3.4.4
(Logical immediate). Both insn groups have N, IMMR and IMMS fields
that feed the DecodeBitMasks pseudo function. */
static void tcg_out_insn_3402(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, TCGReg rn, int n, int immr, int imms)
{
tcg_out32(s, insn | ext << 31 | n << 22 | immr << 16 | imms << 10
| rn << 5 | rd);
}
#define tcg_out_insn_3404 tcg_out_insn_3402
static void tcg_out_insn_3403(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, TCGReg rn, TCGReg rm, int imms)
{
tcg_out32(s, insn | ext << 31 | ext << 22 | rm << 16 | imms << 10
| rn << 5 | rd);
}
/* This function is used for the Move (wide immediate) instruction group.
Note that SHIFT is a full shift count, not the 2 bit HW field. */
static void tcg_out_insn_3405(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, uint16_t half, unsigned shift)
{
tcg_debug_assert((shift & ~0x30) == 0);
tcg_out32(s, insn | ext << 31 | shift << (21 - 4) | half << 5 | rd);
}
static void tcg_out_insn_3406(TCGContext *s, AArch64Insn insn,
TCGReg rd, int64_t disp)
{
tcg_out32(s, insn | (disp & 3) << 29 | (disp & 0x1ffffc) << (5 - 2) | 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 void tcg_out_insn_3506(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, TCGReg rn, TCGReg rm, TCGCond c)
{
tcg_out32(s, insn | ext << 31 | rm << 16 | rn << 5 | rd
| tcg_cond_to_aarch64[c] << 12);
}
static void tcg_out_insn_3507(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, TCGReg rn)
{
tcg_out32(s, insn | ext << 31 | rn << 5 | rd);
}
static void tcg_out_insn_3509(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, TCGReg rn, TCGReg rm, TCGReg ra)
{
tcg_out32(s, insn | ext << 31 | rm << 16 | ra << 10 | rn << 5 | rd);
}
static void tcg_out_insn_3605(TCGContext *s, AArch64Insn insn, bool q,
TCGReg rd, TCGReg rn, int dst_idx, int src_idx)
{
/* Note that bit 11 set means general register input. Therefore
we can handle both register sets with one function. */
tcg_out32(s, insn | q << 30 | (dst_idx << 16) | (src_idx << 11)
| (rd & 0x1f) | (~rn & 0x20) << 6 | (rn & 0x1f) << 5);
}
static void tcg_out_insn_3606(TCGContext *s, AArch64Insn insn, bool q,
TCGReg rd, bool op, int cmode, uint8_t imm8)
{
tcg_out32(s, insn | q << 30 | op << 29 | cmode << 12 | (rd & 0x1f)
| (imm8 & 0xe0) << (16 - 5) | (imm8 & 0x1f) << 5);
}
static void tcg_out_insn_3614(TCGContext *s, AArch64Insn insn, bool q,
TCGReg rd, TCGReg rn, unsigned immhb)
{
tcg_out32(s, insn | q << 30 | immhb << 16
| (rn & 0x1f) << 5 | (rd & 0x1f));
}
static void tcg_out_insn_3616(TCGContext *s, AArch64Insn insn, bool q,
unsigned size, TCGReg rd, TCGReg rn, TCGReg rm)
{
tcg_out32(s, insn | q << 30 | (size << 22) | (rm & 0x1f) << 16
| (rn & 0x1f) << 5 | (rd & 0x1f));
}
static void tcg_out_insn_3617(TCGContext *s, AArch64Insn insn, bool q,
unsigned size, TCGReg rd, TCGReg rn)
{
tcg_out32(s, insn | q << 30 | (size << 22)
| (rn & 0x1f) << 5 | (rd & 0x1f));
}
static void tcg_out_insn_3310(TCGContext *s, AArch64Insn insn,
TCGReg rd, TCGReg base, TCGType ext,
TCGReg regoff)
{
/* Note the AArch64Insn constants above are for C3.3.12. Adjust. */
tcg_out32(s, insn | I3312_TO_I3310 | regoff << 16 |
0x4000 | ext << 13 | base << 5 | (rd & 0x1f));
}
static void tcg_out_insn_3312(TCGContext *s, AArch64Insn insn,
TCGReg rd, TCGReg rn, intptr_t offset)
{
tcg_out32(s, insn | (offset & 0x1ff) << 12 | rn << 5 | (rd & 0x1f));
}
static void tcg_out_insn_3313(TCGContext *s, AArch64Insn insn,
TCGReg rd, TCGReg rn, uintptr_t scaled_uimm)
{
/* Note the AArch64Insn constants above are for C3.3.12. Adjust. */
tcg_out32(s, insn | I3312_TO_I3313 | scaled_uimm << 10
| rn << 5 | (rd & 0x1f));
}
/* Register to register move using ORR (shifted register with no shift). */
static void tcg_out_movr(TCGContext *s, TCGType ext, TCGReg rd, TCGReg rm)
{
tcg_out_insn(s, 3510, ORR, ext, rd, TCG_REG_XZR, rm);
}
/* Register to register move using ADDI (move to/from SP). */
static void tcg_out_movr_sp(TCGContext *s, TCGType ext, TCGReg rd, TCGReg rn)
{
tcg_out_insn(s, 3401, ADDI, ext, rd, rn, 0);
}
/* This function is used for the Logical (immediate) instruction group.
The value of LIMM must satisfy IS_LIMM. See the comment above about
only supporting simplified logical immediates. */
static void tcg_out_logicali(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, TCGReg rn, uint64_t limm)
{
unsigned h, l, r, c;
tcg_debug_assert(is_limm(limm));
h = clz64(limm);
l = ctz64(limm);
if (l == 0) {
r = 0; /* form 0....01....1 */
c = ctz64(~limm) - 1;
if (h == 0) {
r = clz64(~limm); /* form 1..10..01..1 */
c += r;
}
} else {
r = 64 - l; /* form 1....10....0 or 0..01..10..0 */
c = r - h - 1;
}
if (ext == TCG_TYPE_I32) {
r &= 31;
c &= 31;
}
tcg_out_insn_3404(s, insn, ext, rd, rn, ext, r, c);
}
static void tcg_out_dupi_vec(TCGContext *s, TCGType type,
TCGReg rd, tcg_target_long v64)
{
bool q = type == TCG_TYPE_V128;
int cmode, imm8, i;
/* Test all bytes equal first. */
if (v64 == dup_const(MO_8, v64)) {
imm8 = (uint8_t)v64;
tcg_out_insn(s, 3606, MOVI, q, rd, 0, 0xe, imm8);
return;
}
/*
* Test all bytes 0x00 or 0xff second. This can match cases that
* might otherwise take 2 or 3 insns for MO_16 or MO_32 below.
*/
for (i = imm8 = 0; i < 8; i++) {
uint8_t byte = v64 >> (i * 8);
if (byte == 0xff) {
imm8 |= 1 << i;
} else if (byte != 0) {
goto fail_bytes;
}
}
tcg_out_insn(s, 3606, MOVI, q, rd, 1, 0xe, imm8);
return;
fail_bytes:
/*
* Tests for various replications. For each element width, if we
* cannot find an expansion there's no point checking a larger
* width because we already know by replication it cannot match.
*/
if (v64 == dup_const(MO_16, v64)) {
uint16_t v16 = v64;
if (is_shimm16(v16, &cmode, &imm8)) {
tcg_out_insn(s, 3606, MOVI, q, rd, 0, cmode, imm8);
return;
}
if (is_shimm16(~v16, &cmode, &imm8)) {
tcg_out_insn(s, 3606, MVNI, q, rd, 0, cmode, imm8);
return;
}
/*
* Otherwise, all remaining constants can be loaded in two insns:
* rd = v16 & 0xff, rd |= v16 & 0xff00.
*/
tcg_out_insn(s, 3606, MOVI, q, rd, 0, 0x8, v16 & 0xff);
tcg_out_insn(s, 3606, ORR, q, rd, 0, 0xa, v16 >> 8);
return;
} else if (v64 == dup_const(MO_32, v64)) {
uint32_t v32 = v64;
uint32_t n32 = ~v32;
if (is_shimm32(v32, &cmode, &imm8) ||
is_soimm32(v32, &cmode, &imm8) ||
is_fimm32(v32, &cmode, &imm8)) {
tcg_out_insn(s, 3606, MOVI, q, rd, 0, cmode, imm8);
return;
}
if (is_shimm32(n32, &cmode, &imm8) ||
is_soimm32(n32, &cmode, &imm8)) {
tcg_out_insn(s, 3606, MVNI, q, rd, 0, cmode, imm8);
return;
}
/*
* Restrict the set of constants to those we can load with
* two instructions. Others we load from the pool.
*/
i = is_shimm32_pair(v32, &cmode, &imm8);
if (i) {
tcg_out_insn(s, 3606, MOVI, q, rd, 0, cmode, imm8);
tcg_out_insn(s, 3606, ORR, q, rd, 0, i, extract32(v32, i * 4, 8));
return;
}
i = is_shimm32_pair(n32, &cmode, &imm8);
if (i) {
tcg_out_insn(s, 3606, MVNI, q, rd, 0, cmode, imm8);
tcg_out_insn(s, 3606, BIC, q, rd, 0, i, extract32(n32, i * 4, 8));
return;
}
} else if (is_fimm64(v64, &cmode, &imm8)) {
tcg_out_insn(s, 3606, MOVI, q, rd, 1, cmode, imm8);
return;
}
/*
* As a last resort, load from the constant pool. Sadly there
* is no LD1R (literal), so store the full 16-byte vector.
*/
if (type == TCG_TYPE_V128) {
new_pool_l2(s, R_AARCH64_CONDBR19, s->code_ptr, 0, v64, v64);
tcg_out_insn(s, 3305, LDR_v128, 0, rd);
} else {
new_pool_label(s, v64, R_AARCH64_CONDBR19, s->code_ptr, 0);
tcg_out_insn(s, 3305, LDR_v64, 0, rd);
}
}
static bool tcg_out_dup_vec(TCGContext *s, TCGType type, unsigned vece,
TCGReg rd, TCGReg rs)
{
int is_q = type - TCG_TYPE_V64;
tcg_out_insn(s, 3605, DUP, is_q, rd, rs, 1 << vece, 0);
return true;
}
static bool tcg_out_dupm_vec(TCGContext *s, TCGType type, unsigned vece,
TCGReg r, TCGReg base, intptr_t offset)
{
TCGReg temp = TCG_REG_TMP;
if (offset < -0xffffff || offset > 0xffffff) {
tcg_out_movi(s, TCG_TYPE_PTR, temp, offset);
tcg_out_insn(s, 3502, ADD, 1, temp, temp, base);
base = temp;
} else {
AArch64Insn add_insn = I3401_ADDI;
if (offset < 0) {
add_insn = I3401_SUBI;
offset = -offset;
}
if (offset & 0xfff000) {
tcg_out_insn_3401(s, add_insn, 1, temp, base, offset & 0xfff000);
base = temp;
}
if (offset & 0xfff) {
tcg_out_insn_3401(s, add_insn, 1, temp, base, offset & 0xfff);
base = temp;
}
}
tcg_out_insn(s, 3303, LD1R, type == TCG_TYPE_V128, r, base, vece);
return true;
}
static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd,