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tcg/aarch64: Fix tcg_out_rotl

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The last argument of tcg_out_extr() must be in the range 0-31 if ext==0.
Before the fix, when m==0 it becomes 32 and it crashes with an Illegal
instruction on Apple Silicon.  After the fix, it will be 0.  If m is in
the range 1-31, it is the same as before.

Signed-off-by: Yasuo Kuwahara <kwhr00@gmail.com>
Message-Id: <CAHfJ0vSXnmnTLmT0kR=a8ACRdw_UsLYOhStzUzgVEHoH8U-7sA@mail.gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Yasuo Kuwahara 2021-05-25 18:46:19 +09:00 committed by Richard Henderson
parent 57dcb643d7
commit 26b1248f66
1 changed files with 2 additions and 3 deletions
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5
tcg/aarch64/tcg-target.c.inc
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@ -1291,9 +1291,8 @@ static inline void tcg_out_rotr(TCGContext *s, TCGType ext,
static inline void tcg_out_rotl(TCGContext *s, TCGType ext,
TCGReg rd, TCGReg rn, unsigned int m)
{
int bits = ext ? 64 : 32;
int max = bits - 1;
tcg_out_extr(s, ext, rd, rn, rn, bits - (m & max));
int max = ext ? 63 : 31;
tcg_out_extr(s, ext, rd, rn, rn, -m & max);
}
static inline void tcg_out_dep(TCGContext *s, TCGType ext, TCGReg rd,