475a241446
Intended to address an asmdecl error. [amd64] Butterfly: use of unnamed argument 0(FP); offset 0 is x0+0(FP) Updates #24
961 B
961 B
add
Add two numbers with avo.
The code generator is as follows:
// +build ignore
package main
import (
. "github.com/mmcloughlin/avo/build"
)
func main() {
TEXT("Add", NOSPLIT, "func(x, y uint64) uint64")
Doc("Add adds x and y.")
x := Load(Param("x"), GP64())
y := Load(Param("y"), GP64())
ADDQ(x, y)
Store(y, ReturnIndex(0))
RET()
Generate()
}
We use a go:generate line to produce the assembly and Go stub files together.
//go:generate go run asm.go -out add.s -stubs stub.go
This produces add.s as follows:
// Code generated by command: go run asm.go -out add.s -stubs stub.go. DO NOT EDIT.
#include "textflag.h"
// func Add(x uint64, y uint64) uint64
TEXT ·Add(SB), NOSPLIT, $0-24
MOVQ x+0(FP), AX
MOVQ y+8(FP), CX
ADDQ AX, CX
MOVQ CX, ret+16(FP)
RET