Fix shift by register in interpreter

Only the LSB byte is actually used.
2021-09-17 20:17:51 +02:00 · 2021-09-17 20:17:51 +02:00 · 8fabfaf2a8
parent c2c2564e4a
commit 8fabfaf2a8
1 changed files with 1 additions and 1 deletions
--- a/cpu.c
+++ b/cpu.c
@ -345,7 +345,7 @@ void print_register_usage(void)


 #define get_shift_register(dest)                                              \
-  u32 shift = reg[(opcode >> 8) & 0x0F];                                      \
+  u32 shift = reg[(opcode >> 8) & 0x0F] & 0xFF;                               \
  using_register(arm, ((opcode >> 8) & 0x0F), op_shift);                      \
  dest = reg[rm];                                                             \
  if(rm == 15)                                                                \