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riscv: simplify longjmp

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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>
This commit is contained in:
Heinrich Schuchardt 2021-03-23 19:11:26 +01:00 committed by Leo Yu-Chi Liang
parent ae2d9506a3
commit a718e2aed5
1 changed files with 2 additions and 6 deletions
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8
arch/riscv/lib/setjmp.S
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@ -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