cmd/compile: add remaining >v1 instructions to v1-only test

roundsd and FMA (vfmadd231sd).

Change-Id: I2d91332667e577bd9bb903ac58904f62b8454128
Reviewed-on: https://go-review.googlesource.com/c/go/+/354069
Trust: Keith Randall <[email protected]>
Run-TryBot: Keith Randall <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Matthew Dempsky <[email protected]>

src/cmd/compile/internal/amd64/versions_test.go

@@ -11,6 +11,7 @@ import (
  "fmt"
  "internal/testenv"
  "io"
+ "math"
  "math/bits"
  "os"
  "os/exec"
@@ -107,7 +108,7 @@ func clobber(t *testing.T, src string, dst *os.File, opcodes map[string]bool) {
  if err := cmd.Start(); err != nil {
  t.Fatal(err)
  }
- re = regexp.MustCompile(`^\s*([0-9a-f]+):\s*((?:[0-9a-f][0-9a-f] )+)\s*([a-z]+)`)
+ re = regexp.MustCompile(`^\s*([0-9a-f]+):\s*((?:[0-9a-f][0-9a-f] )+)\s*([a-z0-9]+)`)
  }
 
  // Find all the instruction addresses we need to edit.
@@ -209,7 +210,8 @@ var featureToOpcodes = map[string][]string{
  // native objdump doesn't include [QL] on linux.
  "popcnt": []string{"popcntq", "popcntl", "popcnt"},
  "bmi1": []string{"andnq", "andnl", "andn", "blsiq", "blsil", "blsi", "blsmskq", "blsmskl", "blsmsk", "blsrq", "blsrl", "blsr", "tzcntq", "tzcntl", "tzcnt"},
- // TODO: more?
+ "sse41": []string{"roundsd"},
+ "fma": []string{"vfmadd231sd"},
 }
 
 // Test to use POPCNT instruction, if available
@@ -333,3 +335,34 @@ func TestTrailingZeros(t *testing.T) {
  }
  }
 }
+
+func TestRound(t *testing.T) {
+ for _, tt := range []struct {
+ x, want float64
+ }{
+ {1.4, 1},
+ {1.5, 2},
+ {1.6, 2},
+ {2.4, 2},
+ {2.5, 2},
+ {2.6, 3},
+ } {
+ if got := math.RoundToEven(tt.x); got != tt.want {
+ t.Errorf("RoundToEven(%f) = %f, want %f", tt.x, got, tt.want)
+ }
+ }
+}
+
+func TestFMA(t *testing.T) {
+ for _, tt := range []struct {
+ x, y, z, want float64
+ }{
+ {2, 3, 4, 10},
+ {3, 4, 5, 17},
+ } {
+ if got := math.FMA(tt.x, tt.y, tt.z); got != tt.want {
+ t.Errorf("FMA(%f,%f,%f) = %f, want %f", tt.x, tt.y, tt.z, got, tt.want)
+ }
+ }
+
+}