test: migrate plan9 tests to codegen

And remove it from asmtest. Next CL will remove the whole
asmtest infrastructure.

Change-Id: I5851bf7c617456d62a3c6cffacf70252df7b056b
Reviewed-on: https://go-review.googlesource.com/107335
Run-TryBot: Giovanni Bajo <rasky@develer.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/internal/gc/asm_test.go

@@ -220,39 +220,7 @@ func (ats *asmTests) runGo(t *testing.T, args ...string) string {
 	return stdout.String()
 }
 
-var allAsmTests = []*asmTests{
+var allAsmTests = []*asmTests{}
-	{
-		arch:  "amd64",
-		os:    "plan9",
-		tests: plan9AMD64Tests,
-	},
-}
-
-var plan9AMD64Tests = []*asmTest{
-	// We should make sure that the compiler doesn't generate floating point
-	// instructions for non-float operations on Plan 9, because floating point
-	// operations are not allowed in the note handler.
-	// Array zeroing.
-	{
-		fn: `
-		func $() [16]byte {
-			var a [16]byte
-			return a
-		}
-		`,
-		pos: []string{"\tMOVQ\t\\$0, \"\""},
-	},
-	// Array copy.
-	{
-		fn: `
-		func $(a [16]byte) (b [16]byte) {
-			b = a
-			return
-		}
-		`,
-		pos: []string{"\tMOVQ\t\"\"\\.a\\+[0-9]+\\(SP\\), (AX|CX)", "\tMOVQ\t(AX|CX), \"\"\\.b\\+[0-9]+\\(SP\\)"},
-	},
-}
 
 // TestLineNumber checks to make sure the generated assembly has line numbers
 // see issue #16214

test/codegen/floats.go

@@ -71,3 +71,25 @@ func FusedSub64(x, y, z float64) float64 {
 	// ppc64le:"FMSUB\t"
 	return x*y - z
 }
+
+// ---------------- //
+//    Non-floats    //
+// ---------------- //
+
+// We should make sure that the compiler doesn't generate floating point
+// instructions for non-float operations on Plan 9, because floating point
+// operations are not allowed in the note handler.
+
+func ArrayZero() [16]byte {
+	// amd64:"MOVUPS"
+	// plan9/amd64/:-"MOVUPS"
+	var a [16]byte
+	return a
+}
+
+func ArrayCopy(a [16]byte) (b [16]byte) {
+	// amd64:"MOVUPS"
+	// plan9/amd64/:-"MOVUPS"
+	b = a
+	return
+}