[PATCH] tcg/aarch64/tcg-target.c.inc: correction of rotate bit number

[Yasuo Kuwahara]

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 in 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>

---

 tcg/aarch64/tcg-target.c.inc | 5 ++---

 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc

index f07ba98aa4..5bd366f2d4 100644

--- a/tcg/aarch64/tcg-target.c.inc

+++ b/tcg/aarch64/tcg-target.c.inc

@@ -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,

-- 

2.24.3