diff options
Diffstat (limited to 'gcc/config/rs6000/rs6000.h')
| -rw-r--r-- | gcc/config/rs6000/rs6000.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h index 8a926e43c44..def3b53ab95 100644 --- a/gcc/config/rs6000/rs6000.h +++ b/gcc/config/rs6000/rs6000.h @@ -644,12 +644,15 @@ extern enum rs6000_nop_insertion rs6000_sched_insert_nops; /* Define this macro to be the value 1 if unaligned accesses have a cost many times greater than aligned accesses, for example if they are emulated in a trap handler. */ +/* Altivec vector memory instructions simply ignore the low bits; SPE + vector memory instructions trap on unaligned accesses. */ #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) \ (STRICT_ALIGNMENT \ || (((MODE) == SFmode || (MODE) == DFmode || (MODE) == TFmode \ || (MODE) == SDmode || (MODE) == DDmode || (MODE) == TDmode \ || (MODE) == DImode) \ - && (ALIGN) < 32)) + && (ALIGN) < 32) \ + || (VECTOR_MODE_P ((MODE)) && (ALIGN) < GET_MODE_BITSIZE ((MODE)))) /* Standard register usage. */ |