From 40bd384f21a3c46236fdef65df8828d9c6d8b853 Mon Sep 17 00:00:00 2001
From: Sun Yimin <emmansun@users.noreply.github.com>
Date: Wed, 28 Aug 2024 13:12:57 +0800
Subject: [PATCH] internal/subtle: s390x, use VLM/VSTM in loop

---
 internal/subtle/xor_s390x.s | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/internal/subtle/xor_s390x.s b/internal/subtle/xor_s390x.s
index 834385e..202520c 100644
--- a/internal/subtle/xor_s390x.s
+++ b/internal/subtle/xor_s390x.s
@@ -13,22 +13,13 @@ TEXT ·xorBytes(SB),NOSPLIT,$0-32
 	CMPBLT	R4, $64, tail
 
 loop_64:
-	VL 0(R2)(R5*1), V0
-	VL 16(R2)(R5*1), V1
-	VL 32(R2)(R5*1), V2
-	VL 48(R2)(R5*1), V3
-	VL 0(R3)(R5*1), V4
-	VL 16(R3)(R5*1), V5
-	VL 32(R3)(R5*1), V6
-	VL 48(R3)(R5*1), V7
+	VLM 0(R2)(R5*1), V0, V3
+	VLM 0(R3)(R5*1), V4, V7
 	VX V0, V4, V4
 	VX V1, V5, V5
 	VX V2, V6, V6
 	VX V3, V7, V7
-	VST V4, 0(R1)(R5*1)
-	VST V5, 16(R1)(R5*1)
-	VST V6, 32(R1)(R5*1)
-	VST V7, 48(R1)(R5*1)
+	VSTM V4, V7, 0(R1)(R5*1)
 	LAY	64(R5), R5
 	SUB	$64, R4
 	CMPBGE	R4, $64, loop_64