79bee1a316
Uses `buildtag.Format` to format constraints in the assembly and stub file printers. This will ensure `// + build` and `//go:build` syntax are used consistent with the current Go version. Updates #183
120 lines
2.7 KiB
Go
120 lines
2.7 KiB
Go
package printer_test
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import (
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"testing"
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"github.com/mmcloughlin/avo/attr"
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"github.com/mmcloughlin/avo/build"
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"github.com/mmcloughlin/avo/buildtags"
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"github.com/mmcloughlin/avo/printer"
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"github.com/mmcloughlin/avo/reg"
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)
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func TestBasic(t *testing.T) {
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ctx := build.NewContext()
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ctx.Function("add")
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ctx.SignatureExpr("func(x, y uint64) uint64")
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x := ctx.Load(ctx.Param("x"), reg.RAX)
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y := ctx.Load(ctx.Param("y"), reg.R9)
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ctx.ADDQ(x, y)
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ctx.Store(y, ctx.ReturnIndex(0))
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ctx.RET()
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AssertPrintsLines(t, ctx, printer.NewGoAsm, []string{
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"// Code generated by avo. DO NOT EDIT.",
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"",
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"// func add(x uint64, y uint64) uint64",
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"TEXT ·add(SB), $0-24",
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"\tMOVQ x+0(FP), AX",
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"\tMOVQ y+8(FP), R9",
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"\tADDQ AX, R9",
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"\tMOVQ R9, ret+16(FP)",
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"\tRET",
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"",
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})
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}
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func TestTextDecl(t *testing.T) {
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ctx := build.NewContext()
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ctx.Function("noargs")
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ctx.SignatureExpr("func()")
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ctx.AllocLocal(16)
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ctx.RET()
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ctx.Function("withargs")
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ctx.SignatureExpr("func(x, y uint64) uint64")
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ctx.RET()
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ctx.Function("withattr")
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ctx.SignatureExpr("func()")
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ctx.Attributes(attr.NOSPLIT | attr.TLSBSS)
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ctx.RET()
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AssertPrintsLines(t, ctx, printer.NewGoAsm, []string{
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"// Code generated by avo. DO NOT EDIT.",
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"",
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"// func noargs()",
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"TEXT ·noargs(SB), $16", // expect only the frame size
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"\tRET",
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"",
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"// func withargs(x uint64, y uint64) uint64",
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"TEXT ·withargs(SB), $0-24", // expect both frame size and argument size
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"\tRET",
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"",
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"// func withattr()",
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"TEXT ·withattr(SB), NOSPLIT|TLSBSS, $0", // expect to see attributes
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"\tRET",
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"",
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})
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}
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func TestConstraints(t *testing.T) {
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ctx := build.NewContext()
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ctx.ConstraintExpr("linux,386 darwin,!cgo")
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ctx.ConstraintExpr("!noasm")
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expect := []string{
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"// Code generated by avo. DO NOT EDIT.",
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"",
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}
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if buildtags.GoBuildSyntaxSupported() {
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expect = append(expect,
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"//go:build ((linux && 386) || (darwin && !cgo)) && !noasm",
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)
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}
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if buildtags.PlusBuildSyntaxSupported() {
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expect = append(expect,
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"// +build linux,386 darwin,!cgo",
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"// +build !noasm",
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)
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}
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expect = append(expect, "")
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AssertPrintsLines(t, ctx, printer.NewGoAsm, expect)
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}
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func TestAlignmentNoOperands(t *testing.T) {
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ctx := build.NewContext()
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ctx.Function("alignment")
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ctx.SignatureExpr("func()")
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ctx.ADDQ(reg.RAX, reg.RBX)
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ctx.VMOVDQU(reg.Y4, reg.Y11)
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ctx.VZEROUPPER()
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ctx.ADDQ(reg.R9, reg.R13)
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ctx.RET()
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AssertPrintsLines(t, ctx, printer.NewGoAsm, []string{
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"// Code generated by avo. DO NOT EDIT.",
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"",
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"// func alignment()",
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"TEXT ·alignment(SB), $0",
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"\tADDQ AX, BX",
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"\tVMOVDQU Y4, Y11",
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"\tVZEROUPPER", // instruction with no alignment doesn't affect width
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"\tADDQ R9, R13", // retains alignment from above
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"\tRET",
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"",
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})
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}
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