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package printer_test
import (
"testing"
"github.com/mmcloughlin/avo/attr"
"github.com/mmcloughlin/avo/build"
"github.com/mmcloughlin/avo/printer"
"github.com/mmcloughlin/avo/reg"
)
func TestBasic(t *testing.T) {
ctx := build.NewContext()
ctx.Function("add")
ctx.SignatureExpr("func(x, y uint64) uint64")
x := ctx.Load(ctx.Param("x"), reg.RAX)
y := ctx.Load(ctx.Param("y"), reg.R9)
ctx.ADDQ(x, y)
ctx.Store(y, ctx.ReturnIndex(0))
ctx.RET()
AssertPrintsLines(t, ctx, printer.NewGoAsm, []string{
"// Code generated by avo. DO NOT EDIT.",
"",
"// func add(x uint64, y uint64) uint64",
"TEXT ·add(SB), $0-24",
"\tMOVQ x+0(FP), AX",
"\tMOVQ y+8(FP), R9",
"\tADDQ AX, R9",
"\tMOVQ R9, ret+16(FP)",
"\tRET",
"",
})
}
func TestTextDecl(t *testing.T) {
ctx := build.NewContext()
ctx.Function("noargs")
ctx.SignatureExpr("func()")
ctx.AllocLocal(16)
ctx.RET()
ctx.Function("withargs")
ctx.SignatureExpr("func(x, y uint64) uint64")
ctx.RET()
ctx.Function("withattr")
ctx.SignatureExpr("func()")
ctx.Attributes(attr.NOSPLIT | attr.TLSBSS)
ctx.RET()
AssertPrintsLines(t, ctx, printer.NewGoAsm, []string{
"// Code generated by avo. DO NOT EDIT.",
"",
"// func noargs()",
"TEXT ·noargs(SB), $16", // expect only the frame size
"\tRET",
"",
"// func withargs(x uint64, y uint64) uint64",
"TEXT ·withargs(SB), $0-24", // expect both frame size and argument size
"\tRET",
"",
"// func withattr()",
"TEXT ·withattr(SB), NOSPLIT|TLSBSS, $0", // expect to see attributes
"\tRET",
"",
})
}
func TestConstraints(t *testing.T) {
ctx := build.NewContext()
ctx.ConstraintExpr("linux,386 darwin,!cgo")
ctx.ConstraintExpr("!noasm")
AssertPrintsLines(t, ctx, printer.NewGoAsm, []string{
"// Code generated by avo. DO NOT EDIT.",
"",
"// +build linux,386 darwin,!cgo",
"// +build !noasm",
"",
})
}
func TestAlignmentNoOperands(t *testing.T) {
ctx := build.NewContext()
ctx.Function("alignment")
ctx.SignatureExpr("func()")
ctx.ADDQ(reg.RAX, reg.RBX)
ctx.VMOVDQU(reg.Y4, reg.Y11)
ctx.VZEROUPPER()
ctx.ADDQ(reg.R9, reg.R13)
ctx.RET()
AssertPrintsLines(t, ctx, printer.NewGoAsm, []string{
"// Code generated by avo. DO NOT EDIT.",
"",
"// func alignment()",
"TEXT ·alignment(SB), $0",
"\tADDQ AX, BX",
"\tVMOVDQU Y4, Y11",
"\tVZEROUPPER", // instruction with no alignment doesn't affect width
"\tADDQ R9, R13", // retains alignment from above
"\tRET",
"",
})
}
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