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assembler_amd64_go116.go
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assembler_amd64_go116.go
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// +build go1.15,!go1.17
/*
* Copyright 2021 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package encoder
import (
`fmt`
`reflect`
`strconv`
`unsafe`
`github.com/bytedance/sonic/internal/cpu`
`github.com/bytedance/sonic/internal/jit`
`github.com/bytedance/sonic/internal/native/types`
`github.com/twitchyliquid64/golang-asm/obj`
`github.com/twitchyliquid64/golang-asm/obj/x86`
`github.com/bytedance/sonic/internal/native`
`github.com/bytedance/sonic/internal/rt`
)
/** Register Allocations
*
* State Registers:
*
* %rbx : stack base
* %rdi : result pointer
* %rsi : result length
* %rdx : result capacity
* %r12 : sp->p
* %r13 : sp->q
* %r14 : sp->x
* %r15 : sp->f
*
* Error Registers:
*
* %r10 : error type register
* %r11 : error pointer register
*/
/** Function Prototype & Stack Map
*
* func (buf *[]byte, p unsafe.Pointer, sb *_Stack, fv uint64) (err error)
*
* buf : (FP)
* p : 8(FP)
* sb : 16(FP)
* fv : 24(FP)
* err.vt : 32(FP)
* err.vp : 40(FP)
*/
const (
_S_cond = iota
_S_init
)
const (
_FP_args = 48 // 48 bytes for passing arguments to this function
_FP_fargs = 64 // 64 bytes for passing arguments to other Go functions
_FP_saves = 64 // 64 bytes for saving the registers before CALL instructions
_FP_locals = 24 // 24 bytes for local variables
)
const (
_FP_offs = _FP_fargs + _FP_saves + _FP_locals
_FP_size = _FP_offs + 8 // 8 bytes for the parent frame pointer
_FP_base = _FP_size + 8 // 8 bytes for the return address
)
const (
_FM_exp32 = 0x7f800000
_FM_exp64 = 0x7ff0000000000000
)
const (
_IM_null = 0x6c6c756e // 'null'
_IM_true = 0x65757274 // 'true'
_IM_fals = 0x736c6166 // 'fals' ('false' without the 'e')
_IM_open = 0x00225c22 // '"\"∅'
_IM_array = 0x5d5b // '[]'
_IM_object = 0x7d7b // '{}'
_IM_mulv = -0x5555555555555555
)
const (
_LB_more_space = "_more_space"
_LB_more_space_return = "_more_space_return_"
)
const (
_LB_error = "_error"
_LB_error_too_deep = "_error_too_deep"
_LB_error_invalid_number = "_error_invalid_number"
_LB_error_nan_or_infinite = "_error_nan_or_infinite"
_LB_panic = "_panic"
)
var (
_AX = jit.Reg("AX")
_CX = jit.Reg("CX")
_DX = jit.Reg("DX")
_DI = jit.Reg("DI")
_SI = jit.Reg("SI")
_BP = jit.Reg("BP")
_SP = jit.Reg("SP")
_R8 = jit.Reg("R8")
)
var (
_X0 = jit.Reg("X0")
_Y0 = jit.Reg("Y0")
)
var (
_ST = jit.Reg("BX")
_RP = jit.Reg("DI")
_RL = jit.Reg("SI")
_RC = jit.Reg("DX")
)
var (
_LR = jit.Reg("R9")
_R10 = jit.Reg("R10") // used for gcWriterBarrier
_ET = jit.Reg("R10")
_EP = jit.Reg("R11")
)
var (
_SP_p = jit.Reg("R12")
_SP_q = jit.Reg("R13")
_SP_x = jit.Reg("R14")
_SP_f = jit.Reg("R15")
)
var (
_ARG_rb = jit.Ptr(_SP, _FP_base)
_ARG_vp = jit.Ptr(_SP, _FP_base + 8)
_ARG_sb = jit.Ptr(_SP, _FP_base + 16)
_ARG_fv = jit.Ptr(_SP, _FP_base + 24)
)
var (
_RET_et = jit.Ptr(_SP, _FP_base + 32)
_RET_ep = jit.Ptr(_SP, _FP_base + 40)
)
var (
_VAR_sp = jit.Ptr(_SP, _FP_fargs + _FP_saves)
_VAR_dn = jit.Ptr(_SP, _FP_fargs + _FP_saves + 8)
_VAR_vp = jit.Ptr(_SP, _FP_fargs + _FP_saves + 16)
)
var (
_REG_ffi = []obj.Addr{_RP, _RL, _RC}
_REG_enc = []obj.Addr{_ST, _SP_x, _SP_f, _SP_p, _SP_q, _RL}
_REG_jsr = []obj.Addr{_ST, _SP_x, _SP_f, _SP_p, _SP_q, _LR}
_REG_all = []obj.Addr{_ST, _SP_x, _SP_f, _SP_p, _SP_q, _RP, _RL, _RC}
)
type _Assembler struct {
jit.BaseAssembler
p _Program
x int
}
func newAssembler(p _Program) *_Assembler {
return new(_Assembler).Init(p)
}
/** Assembler Interface **/
func (self *_Assembler) Load() _Encoder {
return ptoenc(self.BaseAssembler.LoadWithFaker("json_encoder", _FP_size, _FP_args, _Encoder_Shadow))
}
func (self *_Assembler) Init(p _Program) *_Assembler {
self.p = p
self.BaseAssembler.Init(self.compile)
return self
}
func (self *_Assembler) compile() {
self.prologue()
self.instrs()
self.epilogue()
self.builtins()
}
/** Assembler Stages **/
var _OpFuncTab = [256]func(*_Assembler, *_Instr) {
_OP_null : (*_Assembler)._asm_OP_null,
_OP_empty_arr : (*_Assembler)._asm_OP_empty_arr,
_OP_empty_obj : (*_Assembler)._asm_OP_empty_obj,
_OP_bool : (*_Assembler)._asm_OP_bool,
_OP_i8 : (*_Assembler)._asm_OP_i8,
_OP_i16 : (*_Assembler)._asm_OP_i16,
_OP_i32 : (*_Assembler)._asm_OP_i32,
_OP_i64 : (*_Assembler)._asm_OP_i64,
_OP_u8 : (*_Assembler)._asm_OP_u8,
_OP_u16 : (*_Assembler)._asm_OP_u16,
_OP_u32 : (*_Assembler)._asm_OP_u32,
_OP_u64 : (*_Assembler)._asm_OP_u64,
_OP_f32 : (*_Assembler)._asm_OP_f32,
_OP_f64 : (*_Assembler)._asm_OP_f64,
_OP_str : (*_Assembler)._asm_OP_str,
_OP_bin : (*_Assembler)._asm_OP_bin,
_OP_quote : (*_Assembler)._asm_OP_quote,
_OP_number : (*_Assembler)._asm_OP_number,
_OP_eface : (*_Assembler)._asm_OP_eface,
_OP_iface : (*_Assembler)._asm_OP_iface,
_OP_byte : (*_Assembler)._asm_OP_byte,
_OP_text : (*_Assembler)._asm_OP_text,
_OP_deref : (*_Assembler)._asm_OP_deref,
_OP_index : (*_Assembler)._asm_OP_index,
_OP_load : (*_Assembler)._asm_OP_load,
_OP_save : (*_Assembler)._asm_OP_save,
_OP_drop : (*_Assembler)._asm_OP_drop,
_OP_drop_2 : (*_Assembler)._asm_OP_drop_2,
_OP_recurse : (*_Assembler)._asm_OP_recurse,
_OP_is_nil : (*_Assembler)._asm_OP_is_nil,
_OP_is_nil_p1 : (*_Assembler)._asm_OP_is_nil_p1,
_OP_is_zero_1 : (*_Assembler)._asm_OP_is_zero_1,
_OP_is_zero_2 : (*_Assembler)._asm_OP_is_zero_2,
_OP_is_zero_4 : (*_Assembler)._asm_OP_is_zero_4,
_OP_is_zero_8 : (*_Assembler)._asm_OP_is_zero_8,
_OP_is_zero_map : (*_Assembler)._asm_OP_is_zero_map,
_OP_goto : (*_Assembler)._asm_OP_goto,
_OP_map_iter : (*_Assembler)._asm_OP_map_iter,
_OP_map_stop : (*_Assembler)._asm_OP_map_stop,
_OP_map_check_key : (*_Assembler)._asm_OP_map_check_key,
_OP_map_write_key : (*_Assembler)._asm_OP_map_write_key,
_OP_map_value_next : (*_Assembler)._asm_OP_map_value_next,
_OP_slice_len : (*_Assembler)._asm_OP_slice_len,
_OP_slice_next : (*_Assembler)._asm_OP_slice_next,
_OP_marshal : (*_Assembler)._asm_OP_marshal,
_OP_marshal_p : (*_Assembler)._asm_OP_marshal_p,
_OP_marshal_text : (*_Assembler)._asm_OP_marshal_text,
_OP_marshal_text_p : (*_Assembler)._asm_OP_marshal_text_p,
_OP_cond_set : (*_Assembler)._asm_OP_cond_set,
_OP_cond_testc : (*_Assembler)._asm_OP_cond_testc,
}
func (self *_Assembler) instr(v *_Instr) {
if fn := _OpFuncTab[v.op()]; fn != nil {
fn(self, v)
} else {
panic(fmt.Sprintf("invalid opcode: %d", v.op()))
}
}
func (self *_Assembler) instrs() {
for i, v := range self.p {
self.Mark(i)
self.instr(&v)
self.debug_instr(i, &v)
}
}
func (self *_Assembler) builtins() {
self.more_space()
self.error_too_deep()
self.error_invalid_number()
self.error_nan_or_infinite()
self.go_panic()
}
func (self *_Assembler) epilogue() {
self.Mark(len(self.p))
self.Emit("XORL", _ET, _ET)
self.Emit("XORL", _EP, _EP)
self.Link(_LB_error)
self.Emit("MOVQ", _ARG_rb, _AX) // MOVQ rb<>+0(FP), AX
self.Emit("MOVQ", _RL, jit.Ptr(_AX, 8)) // MOVQ RL, 8(AX)
self.Emit("MOVQ", _ET, _RET_et) // MOVQ ET, et<>+24(FP)
self.Emit("MOVQ", _EP, _RET_ep) // MOVQ EP, ep<>+32(FP)
self.Emit("MOVQ", jit.Ptr(_SP, _FP_offs), _BP) // MOVQ _FP_offs(SP), BP
self.Emit("ADDQ", jit.Imm(_FP_size), _SP) // ADDQ $_FP_size, SP
self.Emit("RET") // RET
}
func (self *_Assembler) prologue() {
self.Emit("SUBQ", jit.Imm(_FP_size), _SP) // SUBQ $_FP_size, SP
self.Emit("MOVQ", _BP, jit.Ptr(_SP, _FP_offs)) // MOVQ BP, _FP_offs(SP)
self.Emit("LEAQ", jit.Ptr(_SP, _FP_offs), _BP) // LEAQ _FP_offs(SP), BP
self.load_buffer() // LOAD {buf}
self.Emit("MOVQ", _ARG_vp, _SP_p) // MOVQ vp<>+8(FP), SP.p
self.Emit("MOVQ", _ARG_sb, _ST) // MOVQ sb<>+16(FP), ST
self.Emit("XORL", _SP_x, _SP_x) // XORL SP.x, SP.x
self.Emit("XORL", _SP_f, _SP_f) // XORL SP.f, SP.f
self.Emit("XORL", _SP_q, _SP_q) // XORL SP.q, SP.q
}
/** Assembler Inline Functions **/
func (self *_Assembler) xsave(reg ...obj.Addr) {
for i, v := range reg {
if i > _FP_saves / 8 - 1 {
panic("too many registers to save")
} else {
self.Emit("MOVQ", v, jit.Ptr(_SP, _FP_fargs + int64(i) * 8))
}
}
}
func (self *_Assembler) xload(reg ...obj.Addr) {
for i, v := range reg {
if i > _FP_saves / 8 - 1 {
panic("too many registers to load")
} else {
self.Emit("MOVQ", jit.Ptr(_SP, _FP_fargs + int64(i) * 8), v)
}
}
}
func (self *_Assembler) rbuf_di() {
if _RP.Reg != x86.REG_DI {
panic("register allocation messed up: RP != DI")
} else {
self.Emit("ADDQ", _RL, _RP)
}
}
func (self *_Assembler) store_int(nd int, fn obj.Addr, ins string) {
self.check_size(nd)
self.save_c() // SAVE $C_regs
self.rbuf_di() // MOVQ RP, DI
self.Emit(ins, jit.Ptr(_SP_p, 0), _SI) // $ins (SP.p), SI
self.call_c(fn) // CALL_C $fn
self.Emit("ADDQ", _AX, _RL) // ADDQ AX, RL
}
func (self *_Assembler) store_str(s string) {
i := 0
m := rt.Str2Mem(s)
/* 8-byte stores */
for i <= len(m) - 8 {
self.Emit("MOVQ", jit.Imm(rt.Get64(m[i:])), _AX) // MOVQ $s[i:], AX
self.Emit("MOVQ", _AX, jit.Sib(_RP, _RL, 1, int64(i))) // MOVQ AX, i(RP)(RL)
i += 8
}
/* 4-byte stores */
if i <= len(m) - 4 {
self.Emit("MOVL", jit.Imm(int64(rt.Get32(m[i:]))), jit.Sib(_RP, _RL, 1, int64(i))) // MOVL $s[i:], i(RP)(RL)
i += 4
}
/* 2-byte stores */
if i <= len(m) - 2 {
self.Emit("MOVW", jit.Imm(int64(rt.Get16(m[i:]))), jit.Sib(_RP, _RL, 1, int64(i))) // MOVW $s[i:], i(RP)(RL)
i += 2
}
/* last byte */
if i < len(m) {
self.Emit("MOVB", jit.Imm(int64(m[i])), jit.Sib(_RP, _RL, 1, int64(i))) // MOVB $s[i:], i(RP)(RL)
}
}
func (self *_Assembler) check_size(n int) {
self.check_size_rl(jit.Ptr(_RL, int64(n)))
}
func (self *_Assembler) check_size_r(r obj.Addr, d int) {
self.check_size_rl(jit.Sib(_RL, r, 1, int64(d)))
}
func (self *_Assembler) check_size_rl(v obj.Addr) {
idx := self.x
key := _LB_more_space_return + strconv.Itoa(idx)
/* the following code relies on LR == R9 to work */
if _LR.Reg != x86.REG_R9 {
panic("register allocation messed up: LR != R9")
}
/* check for buffer capacity */
self.x++
self.Emit("LEAQ", v, _AX) // LEAQ $v, AX
self.Emit("CMPQ", _AX, _RC) // CMPQ AX, RC
self.Sjmp("JBE" , key) // JBE _more_space_return_{n}
self.slice_grow_ax(key) // GROW $key
self.Link(key) // _more_space_return_{n}:
}
func (self *_Assembler) slice_grow_ax(ret string) {
self.Byte(0x4c, 0x8d, 0x0d) // LEAQ ?(PC), R9
self.Sref(ret, 4) // .... &ret
self.Sjmp("JMP" , _LB_more_space) // JMP _more_space
}
/** State Stack Helpers **/
const (
_StateSize = int64(unsafe.Sizeof(_State{}))
_StackLimit = _MaxStack * _StateSize
)
func (self *_Assembler) save_state() {
self.Emit("MOVQ", jit.Ptr(_ST, 0), _CX) // MOVQ (ST), CX
self.Emit("LEAQ", jit.Ptr(_CX, _StateSize), _R8) // LEAQ _StateSize(CX), R8
self.Emit("CMPQ", _R8, jit.Imm(_StackLimit)) // CMPQ R8, $_StackLimit
self.Sjmp("JAE" , _LB_error_too_deep) // JA _error_too_deep
self.Emit("MOVQ", _SP_x, jit.Sib(_ST, _CX, 1, 8)) // MOVQ SP.x, 8(ST)(CX)
self.Emit("MOVQ", _SP_f, jit.Sib(_ST, _CX, 1, 16)) // MOVQ SP.f, 16(ST)(CX)
self.WriteRecNotAX(0, _SP_p, jit.Sib(_ST, _CX, 1, 24)) // MOVQ SP.p, 24(ST)(CX)
self.WriteRecNotAX(1, _SP_q, jit.Sib(_ST, _CX, 1, 32)) // MOVQ SP.q, 32(ST)(CX)
self.Emit("MOVQ", _R8, jit.Ptr(_ST, 0)) // MOVQ R8, (ST)
}
func (self *_Assembler) drop_state(decr int64) {
self.Emit("MOVQ" , jit.Ptr(_ST, 0), _AX) // MOVQ (ST), AX
self.Emit("SUBQ" , jit.Imm(decr), _AX) // SUBQ $decr, AX
self.Emit("MOVQ" , _AX, jit.Ptr(_ST, 0)) // MOVQ AX, (ST)
self.Emit("MOVQ" , jit.Sib(_ST, _AX, 1, 8), _SP_x) // MOVQ 8(ST)(AX), SP.x
self.Emit("MOVQ" , jit.Sib(_ST, _AX, 1, 16), _SP_f) // MOVQ 16(ST)(AX), SP.f
self.Emit("MOVQ" , jit.Sib(_ST, _AX, 1, 24), _SP_p) // MOVQ 24(ST)(AX), SP.p
self.Emit("MOVQ" , jit.Sib(_ST, _AX, 1, 32), _SP_q) // MOVQ 32(ST)(AX), SP.q
self.Emit("PXOR" , _X0, _X0) // PXOR X0, X0
self.Emit("MOVOU", _X0, jit.Sib(_ST, _AX, 1, 8)) // MOVOU X0, 8(ST)(AX)
self.Emit("MOVOU", _X0, jit.Sib(_ST, _AX, 1, 24)) // MOVOU X0, 24(ST)(AX)
}
/** Buffer Helpers **/
func (self *_Assembler) add_char(ch byte) {
self.Emit("MOVB", jit.Imm(int64(ch)), jit.Sib(_RP, _RL, 1, 0)) // MOVB $ch, (RP)(RL)
self.Emit("ADDQ", jit.Imm(1), _RL) // ADDQ $1, RL
}
func (self *_Assembler) add_long(ch uint32, n int64) {
self.Emit("MOVL", jit.Imm(int64(ch)), jit.Sib(_RP, _RL, 1, 0)) // MOVL $ch, (RP)(RL)
self.Emit("ADDQ", jit.Imm(n), _RL) // ADDQ $n, RL
}
func (self *_Assembler) add_text(ss string) {
self.store_str(ss) // TEXT $ss
self.Emit("ADDQ", jit.Imm(int64(len(ss))), _RL) // ADDQ ${len(ss)}, RL
}
func (self *_Assembler) prep_buffer() {
self.Emit("MOVQ", _ARG_rb, _AX) // MOVQ rb<>+0(FP), AX
self.Emit("MOVQ", _RL, jit.Ptr(_AX, 8)) // MOVQ RL, 8(AX)
self.Emit("MOVQ", _AX, jit.Ptr(_SP, 0)) // MOVQ AX, (SP)
}
func (self *_Assembler) prep_buffer_c() {
self.Emit("MOVQ", _ARG_rb, _DI) // MOVQ rb<>+0(FP), DI
self.Emit("MOVQ", _RL, jit.Ptr(_DI, 8)) // MOVQ RL, 8(DI)
}
func (self *_Assembler) save_buffer() {
self.Emit("MOVQ", _ARG_rb, _CX) // MOVQ rb<>+0(FP), CX
self.Emit("MOVQ", _RP, jit.Ptr(_CX, 0)) // MOVQ RP, (CX)
self.Emit("MOVQ", _RL, jit.Ptr(_CX, 8)) // MOVQ RL, 8(CX)
self.Emit("MOVQ", _RC, jit.Ptr(_CX, 16)) // MOVQ RC, 16(CX)
}
func (self *_Assembler) load_buffer() {
self.Emit("MOVQ", _ARG_rb, _AX) // MOVQ rb<>+0(FP), AX
self.Emit("MOVQ", jit.Ptr(_AX, 0), _RP) // MOVQ (AX), RP
self.Emit("MOVQ", jit.Ptr(_AX, 8), _RL) // MOVQ 8(AX), RL
self.Emit("MOVQ", jit.Ptr(_AX, 16), _RC) // MOVQ 16(AX), RC
}
/** Function Interface Helpers **/
var (
_F_assertI2I = jit.Func(assertI2I)
)
func (self *_Assembler) call(pc obj.Addr) {
self.Emit("MOVQ", pc, _AX) // MOVQ $pc, AX
self.Rjmp("CALL", _AX) // CALL AX
}
func (self *_Assembler) save_c() {
self.xsave(_REG_ffi...) // SAVE $REG_ffi
}
func (self *_Assembler) call_c(pc obj.Addr) {
self.call(pc) // CALL $pc
self.xload(_REG_ffi...) // LOAD $REG_ffi
}
func (self *_Assembler) call_go(pc obj.Addr) {
self.xsave(_REG_all...) // SAVE $REG_all
self.call(pc) // CALL $pc
self.xload(_REG_all...) // LOAD $REG_all
}
func (self *_Assembler) call_encoder(pc obj.Addr) {
self.xsave(_REG_enc...) // SAVE $REG_enc
self.call(pc) // CALL $pc
self.xload(_REG_enc...) // LOAD $REG_enc
self.load_buffer() // LOAD {buf}
}
func (self *_Assembler) call_marshaler(fn obj.Addr, it *rt.GoType, vt reflect.Type) {
switch vt.Kind() {
case reflect.Interface : self.call_marshaler_i(fn, it)
case reflect.Ptr, reflect.Map: self.call_marshaler_v(fn, it, vt, true)
default : self.call_marshaler_v(fn, it, vt, false)
}
}
func (self *_Assembler) call_marshaler_i(fn obj.Addr, it *rt.GoType) {
self.Emit("MOVQ" , jit.Gtype(it), _AX) // MOVQ $it, AX
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 0)) // MOVQ AX, (SP)
self.Emit("MOVQ" , jit.Ptr(_SP_p, 0), _AX) // MOVQ (SP.p), AX
self.Emit("MOVQ" , jit.Ptr(_SP_p, 8), _CX) // MOVQ 8(SP.p), CX
self.Emit("TESTQ", _AX, _AX) // TESTQ AX, AX
self.Sjmp("JZ" , "_null_{n}") // JZ _null_{n}
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 8)) // MOVQ AX, 8(SP)
self.Emit("MOVQ" , _CX, jit.Ptr(_SP, 16)) // MOVQ CX, 16(SP)
self.call_go(_F_assertI2I) // CALL_GO assertI2I
self.prep_buffer() // MOVE {buf}, (SP)
self.Emit("MOVOU", jit.Ptr(_SP, 24), _X0) // MOVOU 24(SP), X0
self.Emit("MOVOU", _X0, jit.Ptr(_SP, 8)) // MOVOU X0, 8(SP)
self.Emit("MOVQ", _ARG_fv, _CX) // MOVQ ARG.fv, CX
self.Emit("MOVQ", _CX, jit.Ptr(_SP, 24)) // MOVQ CX, 24(SP)
self.call_encoder(fn) // CALL $fn
self.Emit("MOVQ" , jit.Ptr(_SP, 32), _ET) // MOVQ 32(SP), ET
self.Emit("MOVQ" , jit.Ptr(_SP, 40), _EP) // MOVQ 40(SP), EP
self.Emit("TESTQ", _ET, _ET) // TESTQ ET, ET
self.Sjmp("JNZ" , _LB_error) // JNZ _error
self.Sjmp("JMP" , "_done_{n}") // JMP _done_{n}
self.Link("_null_{n}") // _null_{n}:
self.check_size(4) // SIZE $4
self.Emit("MOVL", jit.Imm(_IM_null), jit.Sib(_RP, _RL, 1, 0)) // MOVL $'null', (RP)(RL*1)
self.Emit("ADDQ", jit.Imm(4), _RL) // ADDQ $4, RL
self.Link("_done_{n}") // _done_{n}:
}
func (self *_Assembler) call_marshaler_v(fn obj.Addr, it *rt.GoType, vt reflect.Type, deref bool) {
self.prep_buffer() // MOVE {buf}, (SP)
self.Emit("MOVQ", jit.Itab(it, vt), _AX) // MOVQ $(itab(it, vt)), AX
self.Emit("MOVQ", _AX, jit.Ptr(_SP, 8)) // MOVQ AX, 8(SP)
/* dereference the pointer if needed */
if !deref {
self.Emit("MOVQ", _SP_p, jit.Ptr(_SP, 16)) // MOVQ SP.p, 16(SP)
} else {
self.Emit("MOVQ", jit.Ptr(_SP_p, 0), _AX) // MOVQ (SP.p), AX
self.Emit("MOVQ", _AX, jit.Ptr(_SP, 16)) // MOVQ AX, 16(SP)
}
/* call the encoder, and perform error checks */
self.Emit("MOVQ", _ARG_fv, _CX) // MOVQ ARG.fv, CX
self.Emit("MOVQ", _CX, jit.Ptr(_SP, 24)) // MOVQ CX, 24(SP)
self.call_encoder(fn) // CALL $fn
self.Emit("MOVQ" , jit.Ptr(_SP, 32), _ET) // MOVQ 32(SP), ET
self.Emit("MOVQ" , jit.Ptr(_SP, 40), _EP) // MOVQ 40(SP), EP
self.Emit("TESTQ", _ET, _ET) // TESTQ ET, ET
self.Sjmp("JNZ" , _LB_error) // JNZ _error
}
/** Builtin: _more_space **/
var (
_T_byte = jit.Type(byteType)
_F_growslice = jit.Func(growslice)
)
func (self *_Assembler) more_space() {
self.Link(_LB_more_space)
self.Emit("MOVQ", _T_byte, jit.Ptr(_SP, 0)) // MOVQ $_T_byte, (SP)
self.Emit("MOVQ", _RP, jit.Ptr(_SP, 8)) // MOVQ RP, 8(SP)
self.Emit("MOVQ", _RL, jit.Ptr(_SP, 16)) // MOVQ RL, 16(SP)
self.Emit("MOVQ", _RC, jit.Ptr(_SP, 24)) // MOVQ RC, 24(SP)
self.Emit("MOVQ", _AX, jit.Ptr(_SP, 32)) // MOVQ AX, 32(SP)
self.xsave(_REG_jsr...) // SAVE $REG_jsr
self.call(_F_growslice) // CALL $pc
self.xload(_REG_jsr...) // LOAD $REG_jsr
self.Emit("MOVQ", jit.Ptr(_SP, 40), _RP) // MOVQ 40(SP), RP
self.Emit("MOVQ", jit.Ptr(_SP, 48), _RL) // MOVQ 48(SP), RL
self.Emit("MOVQ", jit.Ptr(_SP, 56), _RC) // MOVQ 56(SP), RC
self.save_buffer() // SAVE {buf}
self.Rjmp("JMP" , _LR) // JMP LR
}
/** Builtin Errors **/
var (
_V_ERR_too_deep = jit.Imm(int64(uintptr(unsafe.Pointer(_ERR_too_deep))))
_V_ERR_nan_or_infinite = jit.Imm(int64(uintptr(unsafe.Pointer(_ERR_nan_or_infinite))))
_I_json_UnsupportedValueError = jit.Itab(rt.UnpackType(errorType), jsonUnsupportedValueType)
)
func (self *_Assembler) error_too_deep() {
self.Link(_LB_error_too_deep)
self.Emit("MOVQ", _V_ERR_too_deep, _EP) // MOVQ $_V_ERR_too_deep, EP
self.Emit("MOVQ", _I_json_UnsupportedValueError, _ET) // MOVQ $_I_json_UnsupportedValuError, ET
self.Sjmp("JMP" , _LB_error) // JMP _error
}
func (self *_Assembler) error_invalid_number() {
self.Link(_LB_error_invalid_number)
self.call_go(_F_error_number) // CALL_GO error_number
self.Emit("MOVQ", jit.Ptr(_SP, 16), _ET) // MOVQ 16(SP), ET
self.Emit("MOVQ", jit.Ptr(_SP, 24), _EP) // MOVQ 24(SP), EP
self.Sjmp("JMP" , _LB_error) // JMP _error
}
func (self *_Assembler) error_nan_or_infinite() {
self.Link(_LB_error_nan_or_infinite)
self.Emit("MOVQ", _V_ERR_nan_or_infinite, _EP) // MOVQ $_V_ERR_nan_or_infinite, EP
self.Emit("MOVQ", _I_json_UnsupportedValueError, _ET) // MOVQ $_I_json_UnsupportedValuError, ET
self.Sjmp("JMP" , _LB_error) // JMP _error
}
/** String Encoding Routine **/
var (
_F_quote = jit.Imm(int64(native.S_quote))
_F_panic = jit.Func(goPanic)
)
func (self *_Assembler) go_panic() {
self.Link(_LB_panic)
self.Emit("MOVQ", _SP_p, jit.Ptr(_SP, 8))
self.call_go(_F_panic)
}
func (self *_Assembler) encode_string(doubleQuote bool) {
self.Emit("MOVQ" , jit.Ptr(_SP_p, 8), _AX) // MOVQ 8(SP.p), AX
self.Emit("TESTQ", _AX, _AX) // TESTQ AX, AX
self.Sjmp("JZ" , "_str_empty_{n}") // JZ _str_empty_{n}
self.Emit("CMPQ", jit.Ptr(_SP_p, 0), jit.Imm(0))
self.Sjmp("JNE" , "_str_next_{n}")
self.Emit("MOVQ", jit.Imm(int64(panicNilPointerOfNonEmptyString)), jit.Ptr(_SP, 0))
self.Sjmp("JMP", _LB_panic)
self.Link("_str_next_{n}")
/* openning quote, check for double quote */
if !doubleQuote {
self.check_size_r(_AX, 2) // SIZE $2
self.add_char('"') // CHAR $'"'
} else {
self.check_size_r(_AX, 6) // SIZE $6
self.add_long(_IM_open, 3) // TEXT $`"\"`
}
/* quoting loop */
self.Emit("XORL", _AX, _AX) // XORL AX, AX
self.Emit("MOVQ", _AX, _VAR_sp) // MOVQ AX, sp
self.Link("_str_loop_{n}") // _str_loop_{n}:
self.save_c() // SAVE $REG_ffi
/* load the output buffer first, and then input buffer,
* because the parameter registers collide with RP / RL / RC */
self.Emit("MOVQ", _RC, _CX) // MOVQ RC, CX
self.Emit("SUBQ", _RL, _CX) // SUBQ RL, CX
self.Emit("MOVQ", _CX, _VAR_dn) // MOVQ CX, dn
self.Emit("LEAQ", jit.Sib(_RP, _RL, 1, 0), _DX) // LEAQ (RP)(RL), DX
self.Emit("LEAQ", _VAR_dn, _CX) // LEAQ dn, CX
self.Emit("MOVQ", _VAR_sp, _AX) // MOVQ sp, AX
self.Emit("MOVQ", jit.Ptr(_SP_p, 0), _DI) // MOVQ (SP.p), DI
self.Emit("MOVQ", jit.Ptr(_SP_p, 8), _SI) // MOVQ 8(SP.p), SI
self.Emit("ADDQ", _AX, _DI) // ADDQ AX, DI
self.Emit("SUBQ", _AX, _SI) // SUBQ AX, SI
/* set the flags based on `doubleQuote` */
if !doubleQuote {
self.Emit("XORL", _R8, _R8) // XORL R8, R8
} else {
self.Emit("MOVL", jit.Imm(types.F_DOUBLE_UNQUOTE), _R8) // MOVL ${types.F_DOUBLE_UNQUOTE}, R8
}
/* call the native quoter */
self.call_c(_F_quote) // CALL quote
self.Emit("ADDQ" , _VAR_dn, _RL) // ADDQ dn, RL
self.Emit("TESTQ", _AX, _AX) // TESTQ AX, AX
self.Sjmp("JS" , "_str_space_{n}") // JS _str_space_{n}
/* close the string, check for double quote */
if !doubleQuote {
self.check_size(1) // SIZE $1
self.add_char('"') // CHAR $'"'
self.Sjmp("JMP", "_str_end_{n}") // JMP _str_end_{n}
} else {
self.check_size(3) // SIZE $3
self.add_text("\\\"\"") // TEXT $'\""'
self.Sjmp("JMP", "_str_end_{n}") // JMP _str_end_{n}
}
/* not enough space to contain the quoted string */
self.Link("_str_space_{n}") // _str_space_{n}:
self.Emit("NOTQ", _AX) // NOTQ AX
self.Emit("ADDQ", _AX, _VAR_sp) // ADDQ AX, sp
self.Emit("LEAQ", jit.Sib(_RC, _RC, 1, 0), _AX) // LEAQ (RC)(RC), AX
self.slice_grow_ax("_str_loop_{n}") // GROW _str_loop_{n}
/* empty string, check for double quote */
if !doubleQuote {
self.Link("_str_empty_{n}") // _str_empty_{n}:
self.check_size(2) // SIZE $2
self.add_text("\"\"") // TEXT $'""'
self.Link("_str_end_{n}") // _str_end_{n}:
} else {
self.Link("_str_empty_{n}") // _str_empty_{n}:
self.check_size(6) // SIZE $6
self.add_text("\"\\\"\\\"\"") // TEXT $'"\"\""'
self.Link("_str_end_{n}") // _str_end_{n}:
}
}
/** OpCode Assembler Functions **/
var (
_T_json_Marshaler = rt.UnpackType(jsonMarshalerType)
_T_encoding_TextMarshaler = rt.UnpackType(encodingTextMarshalerType)
)
var (
_F_f64toa = jit.Imm(int64(native.S_f64toa))
_F_f32toa = jit.Imm(int64(native.S_f32toa))
_F_i64toa = jit.Imm(int64(native.S_i64toa))
_F_u64toa = jit.Imm(int64(native.S_u64toa))
_F_b64encode = jit.Imm(int64(_subr__b64encode))
)
var (
_F_memmove = jit.Func(memmove)
_F_error_number = jit.Func(error_number)
_F_isValidNumber = jit.Func(isValidNumber)
)
var (
_F_iteratorStop = jit.Func(iteratorStop)
_F_iteratorNext = jit.Func(iteratorNext)
_F_iteratorStart = jit.Func(iteratorStart)
)
var (
_F_encodeTypedPointer obj.Addr
_F_encodeJsonMarshaler obj.Addr
_F_encodeTextMarshaler obj.Addr
)
const (
_MODE_AVX2 = 1 << 2
)
func init() {
_F_encodeTypedPointer = jit.Func(encodeTypedPointer)
_F_encodeJsonMarshaler = jit.Func(encodeJsonMarshaler)
_F_encodeTextMarshaler = jit.Func(encodeTextMarshaler)
}
func (self *_Assembler) _asm_OP_null(_ *_Instr) {
self.check_size(4)
self.Emit("MOVL", jit.Imm(_IM_null), jit.Sib(_RP, _RL, 1, 0)) // MOVL $'null', (RP)(RL*1)
self.Emit("ADDQ", jit.Imm(4), _RL) // ADDQ $4, RL
}
func (self *_Assembler) _asm_OP_empty_arr(_ *_Instr) {
self.Emit("BTQ", jit.Imm(int64(bitNoNullSliceOrMap)), _ARG_fv)
self.Sjmp("JC", "_empty_arr_{n}")
self._asm_OP_null(nil)
self.Sjmp("JMP", "_empty_arr_end_{n}")
self.Link("_empty_arr_{n}")
self.check_size(2)
self.Emit("MOVW", jit.Imm(_IM_array), jit.Sib(_RP, _RL, 1, 0))
self.Emit("ADDQ", jit.Imm(2), _RL)
self.Link("_empty_arr_end_{n}")
}
func (self *_Assembler) _asm_OP_empty_obj(_ *_Instr) {
self.Emit("BTQ", jit.Imm(int64(bitNoNullSliceOrMap)), _ARG_fv)
self.Sjmp("JC", "_empty_obj_{n}")
self._asm_OP_null(nil)
self.Sjmp("JMP", "_empty_obj_end_{n}")
self.Link("_empty_obj_{n}")
self.check_size(2)
self.Emit("MOVW", jit.Imm(_IM_object), jit.Sib(_RP, _RL, 1, 0))
self.Emit("ADDQ", jit.Imm(2), _RL)
self.Link("_empty_obj_end_{n}")
}
func (self *_Assembler) _asm_OP_bool(_ *_Instr) {
self.Emit("CMPB", jit.Ptr(_SP_p, 0), jit.Imm(0)) // CMPB (SP.p), $0
self.Sjmp("JE" , "_false_{n}") // JE _false_{n}
self.check_size(4) // SIZE $4
self.Emit("MOVL", jit.Imm(_IM_true), jit.Sib(_RP, _RL, 1, 0)) // MOVL $'true', (RP)(RL*1)
self.Emit("ADDQ", jit.Imm(4), _RL) // ADDQ $4, RL
self.Sjmp("JMP" , "_end_{n}") // JMP _end_{n}
self.Link("_false_{n}") // _false_{n}:
self.check_size(5) // SIZE $5
self.Emit("MOVL", jit.Imm(_IM_fals), jit.Sib(_RP, _RL, 1, 0)) // MOVL $'fals', (RP)(RL*1)
self.Emit("MOVB", jit.Imm('e'), jit.Sib(_RP, _RL, 1, 4)) // MOVB $'e', 4(RP)(RL*1)
self.Emit("ADDQ", jit.Imm(5), _RL) // ADDQ $5, RL
self.Link("_end_{n}") // _end_{n}:
}
func (self *_Assembler) _asm_OP_i8(_ *_Instr) {
self.store_int(4, _F_i64toa, "MOVBQSX")
}
func (self *_Assembler) _asm_OP_i16(_ *_Instr) {
self.store_int(6, _F_i64toa, "MOVWQSX")
}
func (self *_Assembler) _asm_OP_i32(_ *_Instr) {
self.store_int(17, _F_i64toa, "MOVLQSX")
}
func (self *_Assembler) _asm_OP_i64(_ *_Instr) {
self.store_int(21, _F_i64toa, "MOVQ")
}
func (self *_Assembler) _asm_OP_u8(_ *_Instr) {
self.store_int(3, _F_u64toa, "MOVBQZX")
}
func (self *_Assembler) _asm_OP_u16(_ *_Instr) {
self.store_int(5, _F_u64toa, "MOVWQZX")
}
func (self *_Assembler) _asm_OP_u32(_ *_Instr) {
self.store_int(16, _F_u64toa, "MOVLQZX")
}
func (self *_Assembler) _asm_OP_u64(_ *_Instr) {
self.store_int(20, _F_u64toa, "MOVQ")
}
func (self *_Assembler) _asm_OP_f32(_ *_Instr) {
self.check_size(32)
self.Emit("MOVL" , jit.Ptr(_SP_p, 0), _AX) // MOVL (SP.p), AX
self.Emit("ANDL" , jit.Imm(_FM_exp32), _AX) // ANDL $_FM_exp32, AX
self.Emit("XORL" , jit.Imm(_FM_exp32), _AX) // XORL $_FM_exp32, AX
self.Sjmp("JZ" , _LB_error_nan_or_infinite) // JZ _error_nan_or_infinite
self.save_c() // SAVE $C_regs
self.rbuf_di() // MOVQ RP, DI
self.Emit("MOVSS" , jit.Ptr(_SP_p, 0), _X0) // MOVSS (SP.p), X0
self.Emit("CVTSS2SD", _X0, _X0) // CVTSS2SD X0, X0
self.call_c(_F_f32toa) // CALL_C f32toa
self.Emit("ADDQ" , _AX, _RL) // ADDQ AX, RL
}
func (self *_Assembler) _asm_OP_f64(_ *_Instr) {
self.check_size(32)
self.Emit("MOVQ" , jit.Ptr(_SP_p, 0), _AX) // MOVQ (SP.p), AX
self.Emit("MOVQ" , jit.Imm(_FM_exp64), _CX) // MOVQ $_FM_exp64, CX
self.Emit("ANDQ" , _CX, _AX) // ANDQ CX, AX
self.Emit("XORQ" , _CX, _AX) // XORQ CX, AX
self.Sjmp("JZ" , _LB_error_nan_or_infinite) // JZ _error_nan_or_infinite
self.save_c() // SAVE $C_regs
self.rbuf_di() // MOVQ RP, DI
self.Emit("MOVSD" , jit.Ptr(_SP_p, 0), _X0) // MOVSD (SP.p), X0
self.call_c(_F_f64toa) // CALL_C f64toa
self.Emit("ADDQ" , _AX, _RL) // ADDQ AX, RL
}
func (self *_Assembler) _asm_OP_str(_ *_Instr) {
self.encode_string(false)
}
func (self *_Assembler) _asm_OP_bin(_ *_Instr) {
self.Emit("MOVQ", jit.Ptr(_SP_p, 8), _AX) // MOVQ 8(SP.p), AX
self.Emit("ADDQ", jit.Imm(2), _AX) // ADDQ $2, AX
self.Emit("MOVQ", jit.Imm(_IM_mulv), _CX) // MOVQ $_MF_mulv, CX
self.Emit("MOVQ", _DX, _R8) // MOVQ DX, R8
self.From("MULQ", _CX) // MULQ CX
self.Emit("LEAQ", jit.Sib(_DX, _DX, 1, 1), _AX) // LEAQ 1(DX)(DX), AX
self.Emit("ORQ" , jit.Imm(2), _AX) // ORQ $2, AX
self.Emit("MOVQ", _R8, _DX) // MOVQ R8, DX
self.check_size_r(_AX, 0) // SIZE AX
self.add_char('"') // CHAR $'"'
self.save_c() // SAVE $REG_ffi
self.prep_buffer_c() // MOVE {buf}, DI
self.Emit("MOVQ", _SP_p, _SI) // MOVQ SP.p, SI
/* check for AVX2 support */
if !cpu.HasAVX2 {
self.Emit("XORL", _DX, _DX) // XORL DX, DX
} else {
self.Emit("MOVL", jit.Imm(_MODE_AVX2), _DX) // MOVL $_MODE_AVX2, DX
}
/* call the encoder */
self.call_c(_F_b64encode) // CALL b64encode
self.load_buffer() // LOAD {buf}
self.add_char('"') // CHAR $'"'
}
func (self *_Assembler) _asm_OP_quote(_ *_Instr) {
self.encode_string(true)
}
func (self *_Assembler) _asm_OP_number(_ *_Instr) {
self.Emit("MOVQ" , jit.Ptr(_SP_p, 8), _CX) // MOVQ (SP.p), CX
self.Emit("TESTQ", _CX, _CX) // TESTQ CX, CX
self.Sjmp("JZ" , "_empty_{n}") // JZ _empty_{n}
self.Emit("MOVQ" , jit.Ptr(_SP_p, 0), _AX) // MOVQ (SP.p), AX
self.Emit("TESTQ", _AX, _AX) // TESTQ AX, AX
self.Sjmp("JNZ" , "_number_next_{n}")
self.Emit("MOVQ", jit.Imm(int64(panicNilPointerOfNonEmptyString)), jit.Ptr(_SP, 0))
self.Sjmp("JMP", _LB_panic)
self.Link("_number_next_{n}")
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 0)) // MOVQ AX, (SP)
self.Emit("MOVQ" , _CX, jit.Ptr(_SP, 8)) // MOVQ CX, 8(SP)
self.call_go(_F_isValidNumber) // CALL_GO isValidNumber
self.Emit("CMPB" , jit.Ptr(_SP, 16), jit.Imm(0)) // CMPB 16(SP), $0
self.Sjmp("JE" , _LB_error_invalid_number) // JE _error_invalid_number
self.Emit("MOVQ" , jit.Ptr(_SP_p, 8), _AX) // MOVQ 8(SP.p), AX
self.check_size_r(_AX, 0) // SIZE AX
self.Emit("LEAQ" , jit.Sib(_RP, _RL, 1, 0), _AX) // LEAQ (RP)(RL), AX
self.Emit("ADDQ" , jit.Ptr(_SP_p, 8), _RL) // ADDQ 8(SP.p), RL
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 0)) // MOVQ AX, (SP)
self.Emit("MOVOU", jit.Ptr(_SP_p, 0), _X0) // MOVOU (SP.p), X0
self.Emit("MOVOU", _X0, jit.Ptr(_SP, 8)) // MOVOU X0, 8(SP)
self.call_go(_F_memmove) // CALL_GO memmove
self.Sjmp("JMP" , "_done_{n}") // JMP _done_{n}
self.Link("_empty_{n}") // _empty_{n}:
self.check_size(1) // SIZE $1
self.add_char('0') // CHAR $'0'
self.Link("_done_{n}") // _done_{n}:
}
func (self *_Assembler) _asm_OP_eface(_ *_Instr) {
self.prep_buffer() // MOVE {buf}, (SP)s
self.Emit("MOVQ" , jit.Ptr(_SP_p, 0), _AX) // MOVQ (SP.p), AX
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 8)) // MOVQ AX, 8(SP)
self.Emit("LEAQ" , jit.Ptr(_SP_p, 8), _AX) // LEAQ 8(SP.p), AX
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 16)) // MOVQ AX, 16(SP)
self.Emit("MOVQ" , _ST, jit.Ptr(_SP, 24)) // MOVQ ST, 24(SP)
self.Emit("MOVQ" , _ARG_fv, _AX) // MOVQ fv, AX
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 32)) // MOVQ AX, 32(SP)
self.call_encoder(_F_encodeTypedPointer) // CALL encodeTypedPointer
self.Emit("MOVQ" , jit.Ptr(_SP, 40), _ET) // MOVQ 40(SP), ET
self.Emit("MOVQ" , jit.Ptr(_SP, 48), _EP) // MOVQ 48(SP), EP
self.Emit("TESTQ", _ET, _ET) // TESTQ ET, ET
self.Sjmp("JNZ" , _LB_error) // JNZ _error
}
func (self *_Assembler) _asm_OP_iface(_ *_Instr) {
self.prep_buffer() // MOVE {buf}, (SP)
self.Emit("MOVQ" , jit.Ptr(_SP_p, 0), _AX) // MOVQ (SP.p), AX
self.Emit("MOVQ" , jit.Ptr(_AX, 8), _AX) // MOVQ 8(AX), AX
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 8)) // MOVQ AX, 8(SP)
self.Emit("LEAQ" , jit.Ptr(_SP_p, 8), _AX) // LEAQ 8(SP.p), AX
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 16)) // MOVQ AX, 16(SP)
self.Emit("MOVQ" , _ST, jit.Ptr(_SP, 24)) // MOVQ ST, 24(SP)
self.Emit("MOVQ" , _ARG_fv, _AX) // MOVQ fv, AX
self.Emit("MOVQ" , _AX, jit.Ptr(_SP, 32)) // MOVQ AX, 32(SP)
self.call_encoder(_F_encodeTypedPointer) // CALL encodeTypedPointer
self.Emit("MOVQ" , jit.Ptr(_SP, 40), _ET) // MOVQ 40(SP), ET
self.Emit("MOVQ" , jit.Ptr(_SP, 48), _EP) // MOVQ 48(SP), EP
self.Emit("TESTQ", _ET, _ET) // TESTQ ET, ET
self.Sjmp("JNZ" , _LB_error) // JNZ _error
}
func (self *_Assembler) _asm_OP_byte(p *_Instr) {
self.check_size(1)
self.Emit("MOVB", jit.Imm(p.i64()), jit.Sib(_RP, _RL, 1, 0)) // MOVL p.vi(), (RP)(RL*1)
self.Emit("ADDQ", jit.Imm(1), _RL) // ADDQ $1, RL
}
func (self *_Assembler) _asm_OP_text(p *_Instr) {
self.check_size(len(p.vs())) // SIZE ${len(p.vs())}
self.add_text(p.vs()) // TEXT ${p.vs()}
}
func (self *_Assembler) _asm_OP_deref(_ *_Instr) {
self.Emit("MOVQ", jit.Ptr(_SP_p, 0), _SP_p) // MOVQ (SP.p), SP.p
}
func (self *_Assembler) _asm_OP_index(p *_Instr) {
self.Emit("MOVQ", jit.Imm(p.i64()), _AX) // MOVQ $p.vi(), AX
self.Emit("ADDQ", _AX, _SP_p) // ADDQ AX, SP.p
}
func (self *_Assembler) _asm_OP_load(_ *_Instr) {
self.Emit("MOVQ", jit.Ptr(_ST, 0), _AX) // MOVQ (ST), AX
self.Emit("MOVQ", jit.Sib(_ST, _AX, 1, -24), _SP_x) // MOVQ -24(ST)(AX), SP.x
self.Emit("MOVQ", jit.Sib(_ST, _AX, 1, -8), _SP_p) // MOVQ -8(ST)(AX), SP.p
self.Emit("MOVQ", jit.Sib(_ST, _AX, 1, 0), _SP_q) // MOVQ (ST)(AX), SP.q
}
func (self *_Assembler) _asm_OP_save(_ *_Instr) {