cmd/asm: fix bug about VMOV instruction (move a vector element to another) on ARM64
This change fixes index error when encoding VMOV instruction which pattern
is vmov Vn.<T>[index], Vd.<T>[index]
Change-Id: I949166e6dfd63fb0a9365f183b6c50d452614f9d
Reviewed-on: https://go-review.googlesource.com/101335
Reviewed-by: Cherry Zhang <cherryyz@google.com>
diff --git a/src/cmd/asm/internal/asm/testdata/arm64.s b/src/cmd/asm/internal/asm/testdata/arm64.s
index 4b364c4..570efd8 100644
--- a/src/cmd/asm/internal/asm/testdata/arm64.s
+++ b/src/cmd/asm/internal/asm/testdata/arm64.s
@@ -239,6 +239,7 @@
VMOV V10.S[0], V12.S[1] // 4c050c6e
VMOV V9.H[0], V12.H[1] // 2c05066e
VMOV V8.B[0], V12.B[1] // 0c05036e
+ VMOV V8.B[7], V4.B[8] // 043d116e
VREV32 V5.B16, V5.B16 // a508206e
VDUP V19.S[0], V17.S4 // 7106044e
//
diff --git a/src/cmd/internal/obj/arm64/asm7.go b/src/cmd/internal/obj/arm64/asm7.go
index a948d12..22fd4d6 100644
--- a/src/cmd/internal/obj/arm64/asm7.go
+++ b/src/cmd/internal/obj/arm64/asm7.go
@@ -3910,7 +3910,7 @@
default:
c.ctxt.Diag("invalid arrangement: %v", p)
}
- o1 |= (uint32(imm5&0x1f) << 16) | (uint32(imm4&0xf) << 16) | (uint32(rf&31) << 5) | uint32(rt&31)
+ o1 |= (uint32(imm5&0x1f) << 16) | (uint32(imm4&0xf) << 11) | (uint32(rf&31) << 5) | uint32(rt&31)
break
