diff options
Diffstat (limited to 'gcc/config/rs6000/rs6000.h')
| -rw-r--r-- | gcc/config/rs6000/rs6000.h | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h index 55805490d44..39ef154f046 100644 --- a/gcc/config/rs6000/rs6000.h +++ b/gcc/config/rs6000/rs6000.h @@ -1314,16 +1314,14 @@ enum reg_class ? ((GET_MODE_SIZE (MODE) + UNITS_PER_FP_WORD - 1) / UNITS_PER_FP_WORD) \ : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) -/* If defined, gives a class of registers that cannot be used as the - operand of a SUBREG that changes the mode of the object illegally. */ -#define CLASS_CANNOT_CHANGE_MODE FLOAT_REGS +/* Return a class of registers that cannot change FROM mode to TO mode. */ -/* Defines illegal mode changes for CLASS_CANNOT_CHANGE_MODE. */ +#define CANNOT_CHANGE_MODE_CLASS(FROM, TO) \ + (GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO) ? FLOAT_REGS \ + : (SPE_VECTOR_MODE (FROM) + SPE_VECTOR_MODE (TO)) == 1 ? GENERAL_REGS \ + : NO_REGS) -#define CLASS_CANNOT_CHANGE_MODE_P(FROM,TO) \ - (GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO)) - /* Stack layout; function entry, exit and calling. */ /* Enumeration to give which calling sequence to use. */ |