cmd/internal/obj/arm64: add test coverage for VMOVS and VMOVD

Change-Id: I31ba6696e124dccf37d674d090fdf04ba0a049a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/515616
Reviewed-by: Cherry Mui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Bryan Mills <[email protected]>
Run-TryBot: Joel Sing <[email protected]>

Author: 4a6f656c

src/cmd/internal/obj/arm64/asm_arm64_test.go

@@ -301,13 +301,25 @@ func TestPCALIGN(t *testing.T) {
 	}
 }
 
+func testvmovs() (r1, r2 uint64)
+func testvmovd() (r1, r2 uint64)
 func testvmovq() (r1, r2 uint64)
 
-// TestVMOVQ checks if the arm64 VMOVQ instruction is working properly.
-func TestVMOVQ(t *testing.T) {
-	a, b := testvmovq()
-	if a != 0x7040201008040201 || b != 0x3040201008040201 {
-		t.Errorf("TestVMOVQ got: a=0x%x, b=0x%x, want: a=0x7040201008040201, b=0x3040201008040201", a, b)
+func TestVMOV(t *testing.T) {
+	tests := []struct {
+		op           string
+		vmovFunc     func() (uint64, uint64)
+		wantA, wantB uint64
+	}{
+		{"VMOVS", testvmovs, 0x80402010, 0},
+		{"VMOVD", testvmovd, 0x7040201008040201, 0},
+		{"VMOVQ", testvmovq, 0x7040201008040201, 0x3040201008040201},
+	}
+	for _, test := range tests {
+		gotA, gotB := test.vmovFunc()
+		if gotA != test.wantA || gotB != test.wantB {
+			t.Errorf("%v: got: a=0x%x, b=0x%x, want: a=0x%x, b=0x%x", test.op, gotA, gotB, test.wantA, test.wantB)
+		}
 	}
 }
 
@@ -318,6 +330,6 @@ func TestMOVK(t *testing.T) {
 	x := testmovk()
 	want := uint64(40000 << 48)
 	if x != want {
-		t.Errorf("TestMOVK got %x want %x\n", x, want)
+		t.Errorf("Got %x want %x\n", x, want)
 	}
 }

src/cmd/internal/obj/arm64/asm_arm64_test.s

@@ -4,6 +4,24 @@
 
 #include "textflag.h"
 
+// testvmovs() (r1, r2 uint64)
+TEXT ·testvmovs(SB), NOSPLIT, $0-16
+	VMOVS   $0x80402010, V1
+	VMOV    V1.D[0], R0
+	VMOV    V1.D[1], R1
+	MOVD    R0, r1+0(FP)
+	MOVD    R1, r2+8(FP)
+	RET
+
+// testvmovd() (r1, r2 uint64)
+TEXT ·testvmovd(SB), NOSPLIT, $0-16
+	VMOVD   $0x7040201008040201, V1
+	VMOV    V1.D[0], R0
+	VMOV    V1.D[1], R1
+	MOVD    R0, r1+0(FP)
+	MOVD    R1, r2+8(FP)
+	RET
+
 // testvmovq() (r1, r2 uint64)
 TEXT ·testvmovq(SB), NOSPLIT, $0-16
 	VMOVQ   $0x7040201008040201, $0x3040201008040201, V1