From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Tue, 23 Mar 2021 18:11:26 +0000 (+0100)
Subject: riscv: simplify longjmp
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=a718e2aed52a135f7a6a8745a49e4f5bdff49ecf;p=u-boot.git

riscv: simplify longjmp

The value returned by setjmp must be nonzero. If zero is passed as
parameter it must be replaced by 1.

This patch reduces the code size a bit.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
---

diff --git a/arch/riscv/lib/setjmp.S b/arch/riscv/lib/setjmp.S
index 72bc9241f6..99d6195827 100644
--- a/arch/riscv/lib/setjmp.S
+++ b/arch/riscv/lib/setjmp.S
@@ -54,12 +54,8 @@ ENTRY(longjmp)
 	LOAD_IDX(sp, 13)
 
 	/* Move the return value in place, but return 1 if passed 0. */
-	beq a1, zero, longjmp_1
-	mv a0, a1
-	ret
-
-	longjmp_1:
-	li a0, 1
+	seqz a0, a1
+	add a0, a0, a1
 	ret
 ENDPROC(longjmp)
 .popsection