[PATCH] tcg: Sanitize shift constants on ppc64le so that shift operations with large constants don't generate invalid instructions.

[agrecascino123]

From: "Catherine A. Frederick" <choc...@animebitch.es>

---
 tcg/ppc/tcg-target.inc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tcg/ppc/tcg-target.inc.c b/tcg/ppc/tcg-target.inc.c
index ee1f9227c1..a5450a5e67 100644
--- a/tcg/ppc/tcg-target.inc.c
+++ b/tcg/ppc/tcg-target.inc.c
@@ -790,21 +790,25 @@ static inline void tcg_out_ext32u(TCGContext *s, TCGReg 
dst, TCGReg src)
 
 static inline void tcg_out_shli32(TCGContext *s, TCGReg dst, TCGReg src, int c)
 {
+    c = ((unsigned)c > 32) ? 32 : c;
     tcg_out_rlw(s, RLWINM, dst, src, c, 0, 31 - c);
 }
 
 static inline void tcg_out_shli64(TCGContext *s, TCGReg dst, TCGReg src, int c)
 {
+    c = ((unsigned)c > 64) ? 64 : c;
     tcg_out_rld(s, RLDICR, dst, src, c, 63 - c);
 }
 
 static inline void tcg_out_shri32(TCGContext *s, TCGReg dst, TCGReg src, int c)
 {
+    c = ((unsigned)c > 32) ? 32 : c;
     tcg_out_rlw(s, RLWINM, dst, src, 32 - c, c, 31);
 }
 
 static inline void tcg_out_shri64(TCGContext *s, TCGReg dst, TCGReg src, int c)
 {
+    c = ((unsigned)c > 64) ? 64 : c;
     tcg_out_rld(s, RLDICL, dst, src, 64 - c, c);
 }
 
-- 
2.26.2