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Copy pathsljitNativeARM_64.c
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sljitNativeARM_64.c
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/*
* Stack-less Just-In-Time compiler
*
* Copyright Zoltan Herczeg ([email protected]). All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
SLJIT_API_FUNC_ATTRIBUTE const char* sljit_get_platform_name(void)
{
return "ARM-64" SLJIT_CPUINFO;
}
/* Length of an instruction word */
typedef sljit_u32 sljit_ins;
#define TMP_ZERO (0)
#define TMP_REG1 (SLJIT_NUMBER_OF_REGISTERS + 2)
#define TMP_REG2 (SLJIT_NUMBER_OF_REGISTERS + 3)
#define TMP_LR (SLJIT_NUMBER_OF_REGISTERS + 4)
#define TMP_FP (SLJIT_NUMBER_OF_REGISTERS + 5)
#define TMP_FREG1 (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 1)
#define TMP_FREG2 (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 2)
/* r18 - platform register, currently not used */
static const sljit_u8 reg_map[SLJIT_NUMBER_OF_REGISTERS + 8] = {
31, 0, 1, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15, 16, 17, 8, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 31, 9, 10, 30, 29
};
static const sljit_u8 freg_map[SLJIT_NUMBER_OF_FLOAT_REGISTERS + 3] = {
0, 0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 15, 14, 13, 12, 11, 10, 9, 8, 30, 31
};
#define W_OP ((sljit_ins)1 << 31)
#define RD(rd) ((sljit_ins)reg_map[rd])
#define RT(rt) ((sljit_ins)reg_map[rt])
#define RN(rn) ((sljit_ins)reg_map[rn] << 5)
#define RT2(rt2) ((sljit_ins)reg_map[rt2] << 10)
#define RM(rm) ((sljit_ins)reg_map[rm] << 16)
#define VD(vd) ((sljit_ins)freg_map[vd])
#define VT(vt) ((sljit_ins)freg_map[vt])
#define VT2(vt) ((sljit_ins)freg_map[vt] << 10)
#define VN(vn) ((sljit_ins)freg_map[vn] << 5)
#define VM(vm) ((sljit_ins)freg_map[vm] << 16)
/* --------------------------------------------------------------------- */
/* Instrucion forms */
/* --------------------------------------------------------------------- */
#define ADC 0x9a000000
#define ADD 0x8b000000
#define ADDE 0x8b200000
#define ADDI 0x91000000
#define AND 0x8a000000
#define ANDI 0x92000000
#define ASRV 0x9ac02800
#define B 0x14000000
#define B_CC 0x54000000
#define BL 0x94000000
#define BLR 0xd63f0000
#define BR 0xd61f0000
#define BRK 0xd4200000
#define CBZ 0xb4000000
#define CLZ 0xdac01000
#define CSEL 0x9a800000
#define CSINC 0x9a800400
#define EOR 0xca000000
#define EORI 0xd2000000
#define FABS 0x1e60c000
#define FADD 0x1e602800
#define FCMP 0x1e602000
#define FCVT 0x1e224000
#define FCVTZS 0x9e780000
#define FDIV 0x1e601800
#define FMOV 0x1e604000
#define FMUL 0x1e600800
#define FNEG 0x1e614000
#define FSUB 0x1e603800
#define LDRI 0xf9400000
#define LDRI_F64 0xfd400000
#define LDP 0xa9400000
#define LDP_F64 0x6d400000
#define LDP_POST 0xa8c00000
#define LDR_PRE 0xf8400c00
#define LSLV 0x9ac02000
#define LSRV 0x9ac02400
#define MADD 0x9b000000
#define MOVK 0xf2800000
#define MOVN 0x92800000
#define MOVZ 0xd2800000
#define NOP 0xd503201f
#define ORN 0xaa200000
#define ORR 0xaa000000
#define ORRI 0xb2000000
#define RET 0xd65f0000
#define SBC 0xda000000
#define SBFM 0x93000000
#define SCVTF 0x9e620000
#define SDIV 0x9ac00c00
#define SMADDL 0x9b200000
#define SMULH 0x9b403c00
#define STP 0xa9000000
#define STP_F64 0x6d000000
#define STP_PRE 0xa9800000
#define STRB 0x38206800
#define STRBI 0x39000000
#define STRI 0xf9000000
#define STRI_F64 0xfd000000
#define STR_FI 0x3d000000
#define STR_FR 0x3c206800
#define STUR_FI 0x3c000000
#define STURBI 0x38000000
#define SUB 0xcb000000
#define SUBI 0xd1000000
#define SUBS 0xeb000000
#define UBFM 0xd3000000
#define UDIV 0x9ac00800
#define UMULH 0x9bc03c00
/* dest_reg is the absolute name of the register
Useful for reordering instructions in the delay slot. */
static sljit_s32 push_inst(struct sljit_compiler *compiler, sljit_ins ins)
{
sljit_ins *ptr = (sljit_ins*)ensure_buf(compiler, sizeof(sljit_ins));
FAIL_IF(!ptr);
*ptr = ins;
compiler->size++;
return SLJIT_SUCCESS;
}
static SLJIT_INLINE sljit_s32 emit_imm64_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_uw imm)
{
FAIL_IF(push_inst(compiler, MOVZ | RD(dst) | ((sljit_ins)(imm & 0xffff) << 5)));
FAIL_IF(push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)(imm >> 16) & 0xffff) << 5) | (1 << 21)));
FAIL_IF(push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)(imm >> 32) & 0xffff) << 5) | (2 << 21)));
return push_inst(compiler, MOVK | RD(dst) | ((sljit_ins)(imm >> 48) << 5) | (3 << 21));
}
static SLJIT_INLINE sljit_sw detect_jump_type(struct sljit_jump *jump, sljit_ins *code_ptr, sljit_ins *code, sljit_sw executable_offset)
{
sljit_sw diff;
sljit_uw target_addr;
if (jump->flags & SLJIT_REWRITABLE_JUMP) {
jump->flags |= PATCH_ABS64;
return 0;
}
if (jump->flags & JUMP_ADDR)
target_addr = jump->u.target;
else {
SLJIT_ASSERT(jump->flags & JUMP_LABEL);
target_addr = (sljit_uw)(code + jump->u.label->size) + (sljit_uw)executable_offset;
}
diff = (sljit_sw)target_addr - (sljit_sw)(code_ptr + 4) - executable_offset;
if (jump->flags & IS_COND) {
diff += SSIZE_OF(ins);
if (diff <= 0xfffff && diff >= -0x100000) {
code_ptr[-5] ^= (jump->flags & IS_CBZ) ? (0x1 << 24) : 0x1;
jump->addr -= sizeof(sljit_ins);
jump->flags |= PATCH_COND;
return 5;
}
diff -= SSIZE_OF(ins);
}
if (diff <= 0x7ffffff && diff >= -0x8000000) {
jump->flags |= PATCH_B;
return 4;
}
if (target_addr < 0x100000000l) {
if (jump->flags & IS_COND)
code_ptr[-5] -= (2 << 5);
code_ptr[-2] = code_ptr[0];
return 2;
}
if (target_addr < 0x1000000000000l) {
if (jump->flags & IS_COND)
code_ptr[-5] -= (1 << 5);
jump->flags |= PATCH_ABS48;
code_ptr[-1] = code_ptr[0];
return 1;
}
jump->flags |= PATCH_ABS64;
return 0;
}
static SLJIT_INLINE sljit_sw put_label_get_length(struct sljit_put_label *put_label, sljit_uw max_label)
{
if (max_label < 0x100000000l) {
put_label->flags = 0;
return 2;
}
if (max_label < 0x1000000000000l) {
put_label->flags = 1;
return 1;
}
put_label->flags = 2;
return 0;
}
SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
{
struct sljit_memory_fragment *buf;
sljit_ins *code;
sljit_ins *code_ptr;
sljit_ins *buf_ptr;
sljit_ins *buf_end;
sljit_uw word_count;
sljit_uw next_addr;
sljit_sw executable_offset;
sljit_sw addr;
sljit_u32 dst;
struct sljit_label *label;
struct sljit_jump *jump;
struct sljit_const *const_;
struct sljit_put_label *put_label;
CHECK_ERROR_PTR();
CHECK_PTR(check_sljit_generate_code(compiler));
reverse_buf(compiler);
code = (sljit_ins*)SLJIT_MALLOC_EXEC(compiler->size * sizeof(sljit_ins), compiler->exec_allocator_data);
PTR_FAIL_WITH_EXEC_IF(code);
buf = compiler->buf;
code_ptr = code;
word_count = 0;
next_addr = 0;
executable_offset = SLJIT_EXEC_OFFSET(code);
label = compiler->labels;
jump = compiler->jumps;
const_ = compiler->consts;
put_label = compiler->put_labels;
do {
buf_ptr = (sljit_ins*)buf->memory;
buf_end = buf_ptr + (buf->used_size >> 2);
do {
*code_ptr = *buf_ptr++;
if (next_addr == word_count) {
SLJIT_ASSERT(!label || label->size >= word_count);
SLJIT_ASSERT(!jump || jump->addr >= word_count);
SLJIT_ASSERT(!const_ || const_->addr >= word_count);
SLJIT_ASSERT(!put_label || put_label->addr >= word_count);
/* These structures are ordered by their address. */
if (label && label->size == word_count) {
label->addr = (sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
label->size = (sljit_uw)(code_ptr - code);
label = label->next;
}
if (jump && jump->addr == word_count) {
jump->addr = (sljit_uw)(code_ptr - 4);
code_ptr -= detect_jump_type(jump, code_ptr, code, executable_offset);
jump = jump->next;
}
if (const_ && const_->addr == word_count) {
const_->addr = (sljit_uw)code_ptr;
const_ = const_->next;
}
if (put_label && put_label->addr == word_count) {
SLJIT_ASSERT(put_label->label);
put_label->addr = (sljit_uw)(code_ptr - 3);
code_ptr -= put_label_get_length(put_label, (sljit_uw)(SLJIT_ADD_EXEC_OFFSET(code, executable_offset) + put_label->label->size));
put_label = put_label->next;
}
next_addr = compute_next_addr(label, jump, const_, put_label);
}
code_ptr ++;
word_count ++;
} while (buf_ptr < buf_end);
buf = buf->next;
} while (buf);
if (label && label->size == word_count) {
label->addr = (sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
label->size = (sljit_uw)(code_ptr - code);
label = label->next;
}
SLJIT_ASSERT(!label);
SLJIT_ASSERT(!jump);
SLJIT_ASSERT(!const_);
SLJIT_ASSERT(!put_label);
SLJIT_ASSERT(code_ptr - code <= (sljit_sw)compiler->size);
jump = compiler->jumps;
while (jump) {
do {
addr = (sljit_sw)((jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target);
buf_ptr = (sljit_ins *)jump->addr;
if (jump->flags & PATCH_B) {
addr = (addr - (sljit_sw)SLJIT_ADD_EXEC_OFFSET(buf_ptr, executable_offset)) >> 2;
SLJIT_ASSERT(addr <= 0x1ffffff && addr >= -0x2000000);
buf_ptr[0] = ((jump->flags & IS_BL) ? BL : B) | (sljit_ins)(addr & 0x3ffffff);
if (jump->flags & IS_COND)
buf_ptr[-1] -= (4 << 5);
break;
}
if (jump->flags & PATCH_COND) {
addr = (addr - (sljit_sw)SLJIT_ADD_EXEC_OFFSET(buf_ptr, executable_offset)) >> 2;
SLJIT_ASSERT(addr <= 0x3ffff && addr >= -0x40000);
buf_ptr[0] = (buf_ptr[0] & ~(sljit_ins)0xffffe0) | (sljit_ins)((addr & 0x7ffff) << 5);
break;
}
SLJIT_ASSERT((jump->flags & (PATCH_ABS48 | PATCH_ABS64)) || (sljit_uw)addr <= (sljit_uw)0xffffffff);
SLJIT_ASSERT((jump->flags & PATCH_ABS64) || (sljit_uw)addr <= (sljit_uw)0xffffffffffff);
dst = buf_ptr[0] & 0x1f;
buf_ptr[0] = MOVZ | dst | (((sljit_ins)addr & 0xffff) << 5);
buf_ptr[1] = MOVK | dst | (((sljit_ins)(addr >> 16) & 0xffff) << 5) | (1 << 21);
if (jump->flags & (PATCH_ABS48 | PATCH_ABS64))
buf_ptr[2] = MOVK | dst | (((sljit_ins)(addr >> 32) & 0xffff) << 5) | (2 << 21);
if (jump->flags & PATCH_ABS64)
buf_ptr[3] = MOVK | dst | ((sljit_ins)(addr >> 48) << 5) | (3 << 21);
} while (0);
jump = jump->next;
}
put_label = compiler->put_labels;
while (put_label) {
addr = (sljit_sw)put_label->label->addr;
buf_ptr = (sljit_ins*)put_label->addr;
buf_ptr[0] |= ((sljit_ins)addr & 0xffff) << 5;
buf_ptr[1] |= ((sljit_ins)(addr >> 16) & 0xffff) << 5;
if (put_label->flags >= 1)
buf_ptr[2] |= ((sljit_ins)(addr >> 32) & 0xffff) << 5;
if (put_label->flags >= 2)
buf_ptr[3] |= (sljit_ins)(addr >> 48) << 5;
put_label = put_label->next;
}
compiler->error = SLJIT_ERR_COMPILED;
compiler->executable_offset = executable_offset;
compiler->executable_size = (sljit_uw)(code_ptr - code) * sizeof(sljit_ins);
code = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(code, executable_offset);
code_ptr = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
SLJIT_CACHE_FLUSH(code, code_ptr);
SLJIT_UPDATE_WX_FLAGS(code, code_ptr, 1);
return code;
}
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_has_cpu_feature(sljit_s32 feature_type)
{
switch (feature_type) {
case SLJIT_HAS_FPU:
#ifdef SLJIT_IS_FPU_AVAILABLE
return SLJIT_IS_FPU_AVAILABLE;
#else
/* Available by default. */
return 1;
#endif
case SLJIT_HAS_CLZ:
case SLJIT_HAS_CMOV:
case SLJIT_HAS_PREFETCH:
return 1;
default:
return 0;
}
}
/* --------------------------------------------------------------------- */
/* Core code generator functions. */
/* --------------------------------------------------------------------- */
#define COUNT_TRAILING_ZERO(value, result) \
result = 0; \
if (!(value & 0xffffffff)) { \
result += 32; \
value >>= 32; \
} \
if (!(value & 0xffff)) { \
result += 16; \
value >>= 16; \
} \
if (!(value & 0xff)) { \
result += 8; \
value >>= 8; \
} \
if (!(value & 0xf)) { \
result += 4; \
value >>= 4; \
} \
if (!(value & 0x3)) { \
result += 2; \
value >>= 2; \
} \
if (!(value & 0x1)) { \
result += 1; \
value >>= 1; \
}
#define LOGICAL_IMM_CHECK (sljit_ins)0x100
static sljit_ins logical_imm(sljit_sw imm, sljit_u32 len)
{
sljit_s32 negated;
sljit_u32 ones, right;
sljit_uw mask, uimm;
sljit_ins ins;
if (len & LOGICAL_IMM_CHECK) {
len &= ~LOGICAL_IMM_CHECK;
if (len == 32 && (imm == 0 || imm == -1))
return 0;
if (len == 16 && ((sljit_s32)imm == 0 || (sljit_s32)imm == -1))
return 0;
}
SLJIT_ASSERT((len == 32 && imm != 0 && imm != -1)
|| (len == 16 && (sljit_s32)imm != 0 && (sljit_s32)imm != -1));
uimm = (sljit_uw)imm;
while (1) {
if (len <= 0) {
SLJIT_UNREACHABLE();
return 0;
}
mask = ((sljit_uw)1 << len) - 1;
if ((uimm & mask) != ((uimm >> len) & mask))
break;
len >>= 1;
}
len <<= 1;
negated = 0;
if (uimm & 0x1) {
negated = 1;
uimm = ~uimm;
}
if (len < 64)
uimm &= ((sljit_uw)1 << len) - 1;
/* Unsigned right shift. */
COUNT_TRAILING_ZERO(uimm, right);
/* Signed shift. We also know that the highest bit is set. */
imm = (sljit_sw)~uimm;
SLJIT_ASSERT(imm < 0);
COUNT_TRAILING_ZERO(imm, ones);
if (~imm)
return 0;
if (len == 64)
ins = 1 << 22;
else
ins = (0x3f - ((len << 1) - 1)) << 10;
if (negated)
return ins | ((len - ones - 1) << 10) | ((len - ones - right) << 16);
return ins | ((ones - 1) << 10) | ((len - right) << 16);
}
#undef COUNT_TRAILING_ZERO
static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw simm)
{
sljit_uw imm = (sljit_uw)simm;
sljit_u32 i, zeros, ones, first;
sljit_ins bitmask;
/* Handling simple immediates first. */
if (imm <= 0xffff)
return push_inst(compiler, MOVZ | RD(dst) | ((sljit_ins)imm << 5));
if (simm < 0 && simm >= -0x10000)
return push_inst(compiler, MOVN | RD(dst) | (((sljit_ins)~imm & 0xffff) << 5));
if (imm <= 0xffffffffl) {
if ((imm & 0xffff) == 0)
return push_inst(compiler, MOVZ | RD(dst) | ((sljit_ins)(imm >> 16) << 5) | (1 << 21));
if ((imm & 0xffff0000l) == 0xffff0000)
return push_inst(compiler, (MOVN ^ W_OP) | RD(dst) | (((sljit_ins)~imm & 0xffff) << 5));
if ((imm & 0xffff) == 0xffff)
return push_inst(compiler, (MOVN ^ W_OP) | RD(dst) | (((sljit_ins)~imm & 0xffff0000u) >> (16 - 5)) | (1 << 21));
bitmask = logical_imm(simm, 16);
if (bitmask != 0)
return push_inst(compiler, (ORRI ^ W_OP) | RD(dst) | RN(TMP_ZERO) | bitmask);
FAIL_IF(push_inst(compiler, MOVZ | RD(dst) | (((sljit_ins)imm & 0xffff) << 5)));
return push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)imm & 0xffff0000u) >> (16 - 5)) | (1 << 21));
}
bitmask = logical_imm(simm, 32);
if (bitmask != 0)
return push_inst(compiler, ORRI | RD(dst) | RN(TMP_ZERO) | bitmask);
if (simm < 0 && simm >= -0x100000000l) {
if ((imm & 0xffff) == 0xffff)
return push_inst(compiler, MOVN | RD(dst) | (((sljit_ins)~imm & 0xffff0000u) >> (16 - 5)) | (1 << 21));
FAIL_IF(push_inst(compiler, MOVN | RD(dst) | (((sljit_ins)~imm & 0xffff) << 5)));
return push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)imm & 0xffff0000u) >> (16 - 5)) | (1 << 21));
}
/* A large amount of number can be constructed from ORR and MOVx, but computing them is costly. */
zeros = 0;
ones = 0;
for (i = 4; i > 0; i--) {
if ((simm & 0xffff) == 0)
zeros++;
if ((simm & 0xffff) == 0xffff)
ones++;
simm >>= 16;
}
simm = (sljit_sw)imm;
first = 1;
if (ones > zeros) {
simm = ~simm;
for (i = 0; i < 4; i++) {
if (!(simm & 0xffff)) {
simm >>= 16;
continue;
}
if (first) {
first = 0;
FAIL_IF(push_inst(compiler, MOVN | RD(dst) | (((sljit_ins)simm & 0xffff) << 5) | (i << 21)));
}
else
FAIL_IF(push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)~simm & 0xffff) << 5) | (i << 21)));
simm >>= 16;
}
return SLJIT_SUCCESS;
}
for (i = 0; i < 4; i++) {
if (!(simm & 0xffff)) {
simm >>= 16;
continue;
}
if (first) {
first = 0;
FAIL_IF(push_inst(compiler, MOVZ | RD(dst) | (((sljit_ins)simm & 0xffff) << 5) | (i << 21)));
}
else
FAIL_IF(push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)simm & 0xffff) << 5) | (i << 21)));
simm >>= 16;
}
return SLJIT_SUCCESS;
}
#define ARG1_IMM 0x0010000
#define ARG2_IMM 0x0020000
#define INT_OP 0x0040000
#define SET_FLAGS 0x0080000
#define UNUSED_RETURN 0x0100000
#define CHECK_FLAGS(flag_bits) \
if (flags & SET_FLAGS) { \
inv_bits |= flag_bits; \
if (flags & UNUSED_RETURN) \
dst = TMP_ZERO; \
}
static sljit_s32 emit_op_imm(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 dst, sljit_sw arg1, sljit_sw arg2)
{
/* dst must be register, TMP_REG1
arg1 must be register, TMP_REG1, imm
arg2 must be register, TMP_REG2, imm */
sljit_ins inv_bits = (flags & INT_OP) ? W_OP : 0;
sljit_ins inst_bits;
sljit_s32 op = (flags & 0xffff);
sljit_s32 reg;
sljit_sw imm, nimm;
if (SLJIT_UNLIKELY((flags & (ARG1_IMM | ARG2_IMM)) == (ARG1_IMM | ARG2_IMM))) {
/* Both are immediates. */
flags &= ~ARG1_IMM;
if (arg1 == 0 && op != SLJIT_ADD && op != SLJIT_SUB)
arg1 = TMP_ZERO;
else {
FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
arg1 = TMP_REG1;
}
}
if (flags & (ARG1_IMM | ARG2_IMM)) {
reg = (sljit_s32)((flags & ARG2_IMM) ? arg1 : arg2);
imm = (flags & ARG2_IMM) ? arg2 : arg1;
switch (op) {
case SLJIT_MUL:
case SLJIT_CLZ:
case SLJIT_ADDC:
case SLJIT_SUBC:
/* No form with immediate operand (except imm 0, which
is represented by a ZERO register). */
break;
case SLJIT_MOV:
SLJIT_ASSERT(!(flags & SET_FLAGS) && (flags & ARG2_IMM) && arg1 == TMP_REG1);
return load_immediate(compiler, dst, imm);
case SLJIT_NOT:
SLJIT_ASSERT(flags & ARG2_IMM);
FAIL_IF(load_immediate(compiler, dst, (flags & INT_OP) ? (~imm & 0xffffffff) : ~imm));
goto set_flags;
case SLJIT_SUB:
compiler->status_flags_state = SLJIT_CURRENT_FLAGS_SUB;
if (flags & ARG1_IMM)
break;
imm = -imm;
/* Fall through. */
case SLJIT_ADD:
if (op != SLJIT_SUB)
compiler->status_flags_state = SLJIT_CURRENT_FLAGS_ADD;
if (imm == 0) {
CHECK_FLAGS(1 << 29);
return push_inst(compiler, ((op == SLJIT_ADD ? ADDI : SUBI) ^ inv_bits) | RD(dst) | RN(reg));
}
if (imm > 0 && imm <= 0xfff) {
CHECK_FLAGS(1 << 29);
return push_inst(compiler, (ADDI ^ inv_bits) | RD(dst) | RN(reg) | ((sljit_ins)imm << 10));
}
nimm = -imm;
if (nimm > 0 && nimm <= 0xfff) {
CHECK_FLAGS(1 << 29);
return push_inst(compiler, (SUBI ^ inv_bits) | RD(dst) | RN(reg) | ((sljit_ins)nimm << 10));
}
if (imm > 0 && imm <= 0xffffff && !(imm & 0xfff)) {
CHECK_FLAGS(1 << 29);
return push_inst(compiler, (ADDI ^ inv_bits) | RD(dst) | RN(reg) | (((sljit_ins)imm >> 12) << 10) | (1 << 22));
}
if (nimm > 0 && nimm <= 0xffffff && !(nimm & 0xfff)) {
CHECK_FLAGS(1 << 29);
return push_inst(compiler, (SUBI ^ inv_bits) | RD(dst) | RN(reg) | (((sljit_ins)nimm >> 12) << 10) | (1 << 22));
}
if (imm > 0 && imm <= 0xffffff && !(flags & SET_FLAGS)) {
FAIL_IF(push_inst(compiler, (ADDI ^ inv_bits) | RD(dst) | RN(reg) | (((sljit_ins)imm >> 12) << 10) | (1 << 22)));
return push_inst(compiler, (ADDI ^ inv_bits) | RD(dst) | RN(dst) | (((sljit_ins)imm & 0xfff) << 10));
}
if (nimm > 0 && nimm <= 0xffffff && !(flags & SET_FLAGS)) {
FAIL_IF(push_inst(compiler, (SUBI ^ inv_bits) | RD(dst) | RN(reg) | (((sljit_ins)nimm >> 12) << 10) | (1 << 22)));
return push_inst(compiler, (SUBI ^ inv_bits) | RD(dst) | RN(dst) | (((sljit_ins)nimm & 0xfff) << 10));
}
break;
case SLJIT_AND:
inst_bits = logical_imm(imm, LOGICAL_IMM_CHECK | ((flags & INT_OP) ? 16 : 32));
if (!inst_bits)
break;
CHECK_FLAGS(3 << 29);
return push_inst(compiler, (ANDI ^ inv_bits) | RD(dst) | RN(reg) | inst_bits);
case SLJIT_OR:
case SLJIT_XOR:
inst_bits = logical_imm(imm, LOGICAL_IMM_CHECK | ((flags & INT_OP) ? 16 : 32));
if (!inst_bits)
break;
if (op == SLJIT_OR)
inst_bits |= ORRI;
else
inst_bits |= EORI;
FAIL_IF(push_inst(compiler, (inst_bits ^ inv_bits) | RD(dst) | RN(reg)));
goto set_flags;
case SLJIT_SHL:
if (flags & ARG1_IMM)
break;
if (flags & INT_OP) {
imm &= 0x1f;
FAIL_IF(push_inst(compiler, (UBFM ^ inv_bits) | RD(dst) | RN(arg1)
| (((sljit_ins)-imm & 0x1f) << 16) | ((31 - (sljit_ins)imm) << 10)));
}
else {
imm &= 0x3f;
FAIL_IF(push_inst(compiler, (UBFM ^ inv_bits) | RD(dst) | RN(arg1) | (1 << 22)
| (((sljit_ins)-imm & 0x3f) << 16) | ((63 - (sljit_ins)imm) << 10)));
}
goto set_flags;
case SLJIT_LSHR:
case SLJIT_ASHR:
if (flags & ARG1_IMM)
break;
if (op == SLJIT_ASHR)
inv_bits |= 1 << 30;
if (flags & INT_OP) {
imm &= 0x1f;
FAIL_IF(push_inst(compiler, (UBFM ^ inv_bits) | RD(dst) | RN(arg1)
| ((sljit_ins)imm << 16) | (31 << 10)));
}
else {
imm &= 0x3f;
FAIL_IF(push_inst(compiler, (UBFM ^ inv_bits) | RD(dst) | RN(arg1)
| (1 << 22) | ((sljit_ins)imm << 16) | (63 << 10)));
}
goto set_flags;
default:
SLJIT_UNREACHABLE();
break;
}
if (flags & ARG2_IMM) {
if (arg2 == 0)
arg2 = TMP_ZERO;
else {
FAIL_IF(load_immediate(compiler, TMP_REG2, arg2));
arg2 = TMP_REG2;
}
}
else {
if (arg1 == 0)
arg1 = TMP_ZERO;
else {
FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
arg1 = TMP_REG1;
}
}
}
/* Both arguments are registers. */
switch (op) {
case SLJIT_MOV:
case SLJIT_MOV_P:
SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
if (dst == arg2)
return SLJIT_SUCCESS;
return push_inst(compiler, ORR | RD(dst) | RN(TMP_ZERO) | RM(arg2));
case SLJIT_MOV_U8:
SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
return push_inst(compiler, (UBFM ^ W_OP) | RD(dst) | RN(arg2) | (7 << 10));
case SLJIT_MOV_S8:
SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
if (!(flags & INT_OP))
inv_bits |= 1 << 22;
return push_inst(compiler, (SBFM ^ inv_bits) | RD(dst) | RN(arg2) | (7 << 10));
case SLJIT_MOV_U16:
SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
return push_inst(compiler, (UBFM ^ W_OP) | RD(dst) | RN(arg2) | (15 << 10));
case SLJIT_MOV_S16:
SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
if (!(flags & INT_OP))
inv_bits |= 1 << 22;
return push_inst(compiler, (SBFM ^ inv_bits) | RD(dst) | RN(arg2) | (15 << 10));
case SLJIT_MOV32:
SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
if (dst == arg2)
return SLJIT_SUCCESS;
/* fallthrough */
case SLJIT_MOV_U32:
SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
return push_inst(compiler, (ORR ^ W_OP) | RD(dst) | RN(TMP_ZERO) | RM(arg2));
case SLJIT_MOV_S32:
SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
return push_inst(compiler, SBFM | (1 << 22) | RD(dst) | RN(arg2) | (31 << 10));
case SLJIT_NOT:
SLJIT_ASSERT(arg1 == TMP_REG1);
FAIL_IF(push_inst(compiler, (ORN ^ inv_bits) | RD(dst) | RN(TMP_ZERO) | RM(arg2)));
break; /* Set flags. */
case SLJIT_CLZ:
SLJIT_ASSERT(arg1 == TMP_REG1);
return push_inst(compiler, (CLZ ^ inv_bits) | RD(dst) | RN(arg2));
case SLJIT_ADD:
compiler->status_flags_state = SLJIT_CURRENT_FLAGS_ADD;
CHECK_FLAGS(1 << 29);
return push_inst(compiler, (ADD ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
case SLJIT_ADDC:
compiler->status_flags_state = SLJIT_CURRENT_FLAGS_ADD;
CHECK_FLAGS(1 << 29);
return push_inst(compiler, (ADC ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
case SLJIT_SUB:
compiler->status_flags_state = SLJIT_CURRENT_FLAGS_SUB;
CHECK_FLAGS(1 << 29);
return push_inst(compiler, (SUB ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
case SLJIT_SUBC:
compiler->status_flags_state = SLJIT_CURRENT_FLAGS_SUB;
CHECK_FLAGS(1 << 29);
return push_inst(compiler, (SBC ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
case SLJIT_MUL:
compiler->status_flags_state = 0;
if (!(flags & SET_FLAGS))
return push_inst(compiler, (MADD ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2) | RT2(TMP_ZERO));
if (flags & INT_OP) {
FAIL_IF(push_inst(compiler, SMADDL | RD(dst) | RN(arg1) | RM(arg2) | (31 << 10)));
FAIL_IF(push_inst(compiler, ADD | RD(TMP_LR) | RN(TMP_ZERO) | RM(dst) | (2 << 22) | (31 << 10)));
return push_inst(compiler, SUBS | RD(TMP_ZERO) | RN(TMP_LR) | RM(dst) | (2 << 22) | (63 << 10));
}
FAIL_IF(push_inst(compiler, SMULH | RD(TMP_LR) | RN(arg1) | RM(arg2)));
FAIL_IF(push_inst(compiler, MADD | RD(dst) | RN(arg1) | RM(arg2) | RT2(TMP_ZERO)));
return push_inst(compiler, SUBS | RD(TMP_ZERO) | RN(TMP_LR) | RM(dst) | (2 << 22) | (63 << 10));
case SLJIT_AND:
CHECK_FLAGS(3 << 29);
return push_inst(compiler, (AND ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
case SLJIT_OR:
FAIL_IF(push_inst(compiler, (ORR ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
break; /* Set flags. */
case SLJIT_XOR:
FAIL_IF(push_inst(compiler, (EOR ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
break; /* Set flags. */
case SLJIT_SHL:
FAIL_IF(push_inst(compiler, (LSLV ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
break; /* Set flags. */
case SLJIT_LSHR:
FAIL_IF(push_inst(compiler, (LSRV ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
break; /* Set flags. */
case SLJIT_ASHR:
FAIL_IF(push_inst(compiler, (ASRV ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
break; /* Set flags. */
default:
SLJIT_UNREACHABLE();
return SLJIT_SUCCESS;
}
set_flags:
if (flags & SET_FLAGS)
return push_inst(compiler, (SUBS ^ inv_bits) | RD(TMP_ZERO) | RN(dst) | RM(TMP_ZERO));
return SLJIT_SUCCESS;
}
#define STORE 0x10
#define SIGNED 0x20
#define BYTE_SIZE 0x0
#define HALF_SIZE 0x1
#define INT_SIZE 0x2
#define WORD_SIZE 0x3
#define MEM_SIZE_SHIFT(flags) ((sljit_ins)(flags) & 0x3)
static sljit_s32 emit_op_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg,
sljit_s32 arg, sljit_sw argw, sljit_s32 tmp_reg)
{
sljit_u32 shift = MEM_SIZE_SHIFT(flags);
sljit_u32 type = (shift << 30);
if (!(flags & STORE))
type |= (flags & SIGNED) ? 0x00800000 : 0x00400000;
SLJIT_ASSERT(arg & SLJIT_MEM);
if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
argw &= 0x3;
if (argw == 0 || argw == shift)
return push_inst(compiler, STRB | type | RT(reg)
| RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | (argw ? (1 << 12) : 0));
FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | ((sljit_ins)argw << 10)));
return push_inst(compiler, STRBI | type | RT(reg) | RN(tmp_reg));
}
arg &= REG_MASK;
if (!arg) {
FAIL_IF(load_immediate(compiler, tmp_reg, argw & ~(0xfff << shift)));
argw = (argw >> shift) & 0xfff;
return push_inst(compiler, STRBI | type | RT(reg) | RN(tmp_reg) | ((sljit_ins)argw << 10));
}
if (argw >= 0 && (argw & ((1 << shift) - 1)) == 0) {
if ((argw >> shift) <= 0xfff)
return push_inst(compiler, STRBI | type | RT(reg) | RN(arg) | ((sljit_ins)argw << (10 - shift)));
if (argw <= 0xffffff) {
FAIL_IF(push_inst(compiler, ADDI | (1 << 22) | RD(tmp_reg) | RN(arg) | (((sljit_ins)argw >> 12) << 10)));
argw = ((argw & 0xfff) >> shift);
return push_inst(compiler, STRBI | type | RT(reg) | RN(tmp_reg) | ((sljit_ins)argw << 10));
}
}
if (argw <= 255 && argw >= -256)
return push_inst(compiler, STURBI | type | RT(reg) | RN(arg) | (((sljit_ins)argw & 0x1ff) << 12));
FAIL_IF(load_immediate(compiler, tmp_reg, argw));
return push_inst(compiler, STRB | type | RT(reg) | RN(arg) | RM(tmp_reg));
}
/* --------------------------------------------------------------------- */
/* Entry, exit */
/* --------------------------------------------------------------------- */
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
{
sljit_s32 prev, fprev, saved_regs_size, i, tmp;
sljit_s32 word_arg_count = 0;
sljit_ins offs;
CHECK_ERROR();
CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
saved_regs_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 2);
saved_regs_size += GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, SSIZE_OF(f64));
local_size = (local_size + saved_regs_size + 0xf) & ~0xf;
compiler->local_size = local_size;
if (local_size <= 512) {
FAIL_IF(push_inst(compiler, STP_PRE | RT(TMP_FP) | RT2(TMP_LR)
| RN(SLJIT_SP) | (sljit_ins)((-(local_size >> 3) & 0x7f) << 15)));
offs = (sljit_ins)(local_size - 2 * SSIZE_OF(sw)) << (15 - 3);
local_size = 0;
} else {
saved_regs_size = ((saved_regs_size - 2 * SSIZE_OF(sw)) + 0xf) & ~0xf;
FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | ((sljit_ins)saved_regs_size << 10)));
offs = (sljit_ins)(saved_regs_size - 2 * SSIZE_OF(sw)) << (15 - 3);
local_size -= saved_regs_size;
SLJIT_ASSERT(local_size > 0);
}
prev = -1;
tmp = SLJIT_S0 - saveds;
for (i = SLJIT_S0; i > tmp; i--) {
if (prev == -1) {
prev = i;
continue;
}
FAIL_IF(push_inst(compiler, STP | RT(prev) | RT2(i) | RN(SLJIT_SP) | offs));
offs -= (sljit_ins)2 << 15;
prev = -1;
}
for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--) {
if (prev == -1) {
prev = i;
continue;
}
FAIL_IF(push_inst(compiler, STP | RT(prev) | RT2(i) | RN(SLJIT_SP) | offs));
offs -= (sljit_ins)2 << 15;
prev = -1;
}
fprev = -1;
tmp = SLJIT_FS0 - fsaveds;
for (i = SLJIT_FS0; i > tmp; i--) {
if (fprev == -1) {
fprev = i;
continue;
}
FAIL_IF(push_inst(compiler, STP_F64 | VT(fprev) | VT2(i) | RN(SLJIT_SP) | offs));
offs -= (sljit_ins)2 << 15;
fprev = -1;
}
for (i = fscratches; i >= SLJIT_FIRST_SAVED_FLOAT_REG; i--) {
if (fprev == -1) {
fprev = i;
continue;
}
FAIL_IF(push_inst(compiler, STP_F64 | VT(fprev) | VT2(i) | RN(SLJIT_SP) | offs));
offs -= (sljit_ins)2 << 15;
fprev = -1;
}
if (fprev != -1)