diff --git a/arch/amd64_ext.go b/arch/amd64_ext.go
index 6b68e02..b0b3bb2 100644
--- a/arch/amd64_ext.go
+++ b/arch/amd64_ext.go
@@ -364,6 +364,12 @@ var amd64Extensions = []ExtInstr{
 	{Name: "VSQRTSH", Summary: "Compute the square root of a scalar FP16 value",
 		Bytes: []byte{0x62, 0x05, 0x06, 0x00, 0x51, 0xC0}, Form: ExtFormAmdVec3, Feature: ExtFeatureFP16,
 		Ref: "Intel SDM Vol. 2C, VSQRTSH (EVEX.NDS.LIG.F3.MAP5.W0 51 /r)"},
+	{Name: "VSCALEFSH", Summary: "Scale a scalar FP16 value by the ratio of two others",
+		Bytes: []byte{0x62, 0x06, 0x05, 0x00, 0x2D, 0xC0}, Form: ExtFormAmdVec3, Feature: ExtFeatureFP16,
+		Ref: "Intel SDM Vol. 2C, VSCALEFSH (EVEX.NDS.LIG.66.MAP6.W0 2D /r)"},
+	{Name: "VGETEXPSH", Summary: "Convert the exponent of a scalar FP16 value to an FP16 value",
+		Bytes: []byte{0x62, 0x06, 0x05, 0x00, 0x43, 0xC0}, Form: ExtFormAmdVec3, Feature: ExtFeatureFP16,
+		Ref: "Intel SDM Vol. 2C, VGETEXPSH (EVEX.NDS.LIG.66.MAP6.W0 43 /r)"},
 	{Name: "VCOMISH", Summary: "Compare a scalar FP16 value and set EFLAGS",
 		Bytes: []byte{0x62, 0x05, 0x04, 0x00, 0x2F, 0xC0}, Form: ExtFormAmdVec2, Feature: ExtFeatureFP16,
 		Ref: "Intel SDM Vol. 2C, VCOMISH (EVEX.LIG.MAP5.W0 2F /r)"},
diff --git a/arch/amd64_ext_test.go b/arch/amd64_ext_test.go
index ec542df..3994915 100644
--- a/arch/amd64_ext_test.go
+++ b/arch/amd64_ext_test.go
@@ -108,6 +108,14 @@ var amd64GoldenRows = []amd64GoldenRow{
 		[]ExtOperand{ExtXmm(29), ExtXmm(28), ExtXmm(30)},
 		"6205160051f4", "62 05 16 00 51 f4 vsqrtsh %xmm28,%xmm29,%xmm30"},
 
+	// The scalar scale and exponent extracts, EVEX.NDS.LIG.66.MAP6.W0.
+	{"vscalefsh", "VSCALEFSH",
+		[]ExtOperand{ExtXmm(29), ExtXmm(28), ExtXmm(30)},
+		"620615002df4", "62 06 15 00 2d f4 vscalefsh %xmm28,%xmm29,%xmm30"},
+	{"vgetexpsh", "VGETEXPSH",
+		[]ExtOperand{ExtXmm(29), ExtXmm(28), ExtXmm(30)},
+		"6206150043f4", "62 06 15 00 43 f4 vgetexpsh %xmm28,%xmm29,%xmm30"},
+
 	// The scalar compares take two operands, EVEX.LIG.MAP5.W0.
 	{"vcomish", "VCOMISH",
 		[]ExtOperand{ExtXmm(29), ExtXmm(30)},
@@ -416,7 +424,7 @@ func TestAmd64ExtArchBinding(t *testing.T) {
 			t.Errorf("Extensions(%s) carries %d instructions, want none", a, len(got))
 		}
 	}
-	if got := Extensions(AMD64); len(got) != 46 {
-		t.Errorf("the amd64 layer registers %d instructions, want 46", len(got))
+	if got := Extensions(AMD64); len(got) != 48 {
+		t.Errorf("the amd64 layer registers %d instructions, want 48", len(got))
 	}
 }
diff --git a/asm/extension_amd64_test.go b/asm/extension_amd64_test.go
index f15ba1e..92c579f 100644
--- a/asm/extension_amd64_test.go
+++ b/asm/extension_amd64_test.go
@@ -35,6 +35,8 @@ func TestAmd64ExtensionRegistry(t *testing.T) {
 		{"VCVTSH2SI", 2},
 		{"VADDPH", 1},
 		{"VSQRTPH", 1},
+		{"VSCALEFSH", 1},
+		{"VGETEXPSH", 1},
 	} {
 		cands, ok := LookupExtension(arch.AMD64, tt.mnem)
 		if !ok {
@@ -48,8 +50,8 @@ func TestAmd64ExtensionRegistry(t *testing.T) {
 			t.Errorf("the %s lookup is not case-insensitive", tt.mnem)
 		}
 	}
-	if got := arch.Extensions(arch.AMD64); len(got) != 46 {
-		t.Errorf("the amd64 layer registers %d instructions, want 46", len(got))
+	if got := arch.Extensions(arch.AMD64); len(got) != 48 {
+		t.Errorf("the amd64 layer registers %d instructions, want 48", len(got))
 	}
 	if _, ok := LookupExtension(arch.AMD64, "NOSUCHINSTR"); ok {
 		t.Error("a non-extended mnemonic resolved")