From f95cce434f74bd551f84b3c6581c76ad2fe56dbb Mon Sep 17 00:00:00 2001
From: emmansun <emman.sun@foxmail.com>
Date: Thu, 22 Jun 2023 15:50:06 +0800
Subject: [PATCH] sm9/bn256: fix arm64 from mont func issue

---
 sm9/bn256/gfp.go      | 2 +-
 sm9/bn256/gfp_arm64.s | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sm9/bn256/gfp.go b/sm9/bn256/gfp.go
index c427bbc..10291de 100644
--- a/sm9/bn256/gfp.go
+++ b/sm9/bn256/gfp.go
@@ -150,7 +150,7 @@ func (e *gfP) Unmarshal(in []byte) error {
 }
 
 func montEncode(c, a *gfP) { gfpMul(c, a, r2) }
-func montDecode(c, a *gfP) { gfpMul(c, a, &gfP{1}) }
+func montDecode(c, a *gfP) { gfpFromMont(c, a) }
 
 // cmovznzU64 is a single-word conditional move.
 //
diff --git a/sm9/bn256/gfp_arm64.s b/sm9/bn256/gfp_arm64.s
index dbf26ba..1324a85 100644
--- a/sm9/bn256/gfp_arm64.s
+++ b/sm9/bn256/gfp_arm64.s
@@ -660,7 +660,7 @@ TEXT ·gfpFromMont(SB),NOSPLIT,$0
 	ADCS	t0, acc2, acc2
 
 	UMULH	const3, hlp0, hlp0
-	ADC	$0, acc7
+	ADC	$0, hlp0
 
 	ADDS	t1, acc0, acc0
 	ADCS	y0, acc1, acc1