func emitRbrac(asm *amd64.Assembler, cc *compiled) {
header := cc.stack[len(cc.stack)-1]
cc.stack = cc.stack[:len(cc.stack)-1]
asm.JmpRel(gojit.Addr(asm.Buf[header:]))
end := asm.Off
asm.Off = header
asm.Testb(amd64.Imm{0xff}, amd64.Indirect{amd64.Rax, 0, 8})
asm.JccRel(amd64.CC_Z, gojit.Addr(asm.Buf[end:]))
asm.Off = end
}
func jcc(a *amd64.Assembler, cc byte, over func(*amd64.Assembler)) {
start := a.Off
a.JccShort(cc, 0)
base := a.Off
over(a)
end := a.Off
a.Off = start
if int(int8(end-base)) != end-base {
panic("jcc: too far!")
}
a.JccShort(cc, int8(end-base))
a.Off = end
}
func emitComma(asm *amd64.Assembler, cc *compiled) {
asm.Push(amd64.Rax)
asm.Sub(amd64.Imm{48}, amd64.Rsp)
asm.Mov(amd64.Imm{1}, amd64.Indirect{amd64.Rsp, 16, 64})
asm.Mov(amd64.Imm{1}, amd64.Indirect{amd64.Rsp, 8, 64})
asm.Mov(amd64.Rax, amd64.Indirect{amd64.Rsp, 0, 64})
asm.CallFunc(cc.r)
asm.Add(amd64.Imm{48}, amd64.Rsp)
asm.Pop(amd64.Rax)
asm.Test(amd64.Imm{-1}, amd64.Indirect{amd64.Rsp, -24, 64})
jcc(asm, amd64.CC_Z, func(asm *amd64.Assembler) {
asm.Movb(amd64.Imm{0}, amd64.Indirect{amd64.Rax, 0, 8})
})
}
func emitDot(asm *amd64.Assembler, cc *compiled) {
asm.Push(amd64.Rax)
asm.Sub(amd64.Imm{48}, amd64.Rsp)
asm.Mov(amd64.Imm{1}, amd64.Indirect{amd64.Rsp, 16, 64})
asm.Mov(amd64.Imm{1}, amd64.Indirect{amd64.Rsp, 8, 64})
asm.Mov(amd64.Rax, amd64.Indirect{amd64.Rsp, 0, 64})
asm.CallFunc(cc.w)
asm.Add(amd64.Imm{48}, amd64.Rsp)
asm.Pop(amd64.Rax)
}
func emitLbrac(asm *amd64.Assembler, cc *compiled) {
cc.stack = append(cc.stack, asm.Off)
asm.Testb(amd64.Imm{0xff}, amd64.Indirect{amd64.Rax, 0, 8})
asm.JccRel(amd64.CC_Z, gojit.Addr(asm.Buf[asm.Off:]))
}