3 files changed, 56 insertions, 0 deletions
diff --git a/src/cmd/internal/obj/arm64/a.out.go b/src/cmd/internal/obj/arm64/a.out.go
index 6ef3ac5105..f6ef1681f2 100644
--- a/src/cmd/internal/obj/arm64/a.out.go
+++ b/src/cmd/internal/obj/arm64/a.out.go
@@ -1116,6 +1116,14 @@ const (
 	AVSHADD
 	AVSRHADD
 	AVADDV
+	AVFMAXV
+	AVFMAXNMV
+	AVFMINV
+	AVFMINNMV
+	AVSMAXV
+	AVSMINV
+	AVUMAXV
+	AVUMINV
 	AVAND
 	AVBCAX
 	AVBIF
diff --git a/src/cmd/internal/obj/arm64/anames.go b/src/cmd/internal/obj/arm64/anames.go
index a4de13ed1c..9592e9246c 100644
--- a/src/cmd/internal/obj/arm64/anames.go
+++ b/src/cmd/internal/obj/arm64/anames.go
@@ -472,6 +472,14 @@ var Anames = []string{
 	"VSHADD",
 	"VSRHADD",
 	"VADDV",
+	"VFMAXV",
+	"VFMAXNMV",
+	"VFMINV",
+	"VFMINNMV",
+	"VSMAXV",
+	"VSMINV",
+	"VUMAXV",
+	"VUMINV",
 	"VAND",
 	"VBCAX",
 	"VBIF",
diff --git a/src/cmd/internal/obj/arm64/asm7.go b/src/cmd/internal/obj/arm64/asm7.go
index 00af21857c..aa1c76368a 100644
--- a/src/cmd/internal/obj/arm64/asm7.go
+++ b/src/cmd/internal/obj/arm64/asm7.go
@@ -3288,6 +3288,14 @@ func buildop(ctxt *obj.Link) {
 
 		case AVADDV:
 			oprangeset(AVUADDLV, t)
+			oprangeset(AVFMAXV, t)
+			oprangeset(AVFMAXNMV, t)
+			oprangeset(AVFMINV, t)
+			oprangeset(AVFMINNMV, t)
+			oprangeset(AVSMAXV, t)
+			oprangeset(AVSMINV, t)
+			oprangeset(AVUMAXV, t)
+			oprangeset(AVUMINV, t)
 
 		case AVFMLA:
 			oprangeset(AVFMLS, t)
@@ -5312,6 +5320,14 @@ func (c *ctxt7) asmout(p *obj.Prog, out []uint32) (count int) {
 		default:
 			c.ctxt.Diag("invalid arrangement: %v\n", p)
 		}
+		switch p.As {
+		// Floating-point reduction instructions only support .S4 arrangement and don't have a size field.
+		case AVFMAXV, AVFMINV, AVFMAXNMV, AVFMINNMV:
+			if af != ARNG_4S {
+				c.ctxt.Diag("invalid arrangement: %v\n", p)
+			}
+			size = 0
+		}
 		o1 = c.oprrr(p, p.As, p.To.Reg, p.From.Reg, obj.REG_NONE)
 		o1 |= uint32(Q&1)<<30 | uint32(size&3)<<22
 
@@ -6800,6 +6816,30 @@ func (c *ctxt7) oprrr(p *obj.Prog, a obj.As, rd, rn, rm int16) uint32 {
 	case AVADDV:
 		op = ASIMDALL(0, 0, 0x1B)
 
+	case AVFMAXV:
+		op = ASIMDALL(1, 0, 0xF)
+
+	case AVFMAXNMV:
+		op = ASIMDALL(1, 0, 0xC)
+
+	case AVFMINV:
+		op = ASIMDALL(1, 2, 0xF)
+
+	case AVFMINNMV:
+		op = ASIMDALL(1, 2, 0xC)
+
+	case AVSMAXV:
+		op = ASIMDALL(0, 0, 0xA)
+
+	case AVSMINV:
+		op = ASIMDALL(0, 0, 0x1A)
+
+	case AVUMAXV:
+		op = ASIMDALL(1, 0, 0xA)
+
+	case AVUMINV:
+		op = ASIMDALL(1, 0, 0x1A)
+
 	case AVUADDLV:
 		op = ASIMDALL(1, 0, 0x03)