diff options
Diffstat (limited to 'gcc/config/m68k/m68k.c')
| -rw-r--r-- | gcc/config/m68k/m68k.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c index 73b76375860..cd2e15e2f6c 100644 --- a/gcc/config/m68k/m68k.c +++ b/gcc/config/m68k/m68k.c @@ -187,6 +187,7 @@ static bool m68k_output_addr_const_extra (FILE *, rtx); static void m68k_init_sync_libfuncs (void) ATTRIBUTE_UNUSED; static enum flt_eval_method m68k_excess_precision (enum excess_precision_type); +static unsigned int m68k_hard_regno_nregs (unsigned int, machine_mode); static bool m68k_hard_regno_mode_ok (unsigned int, machine_mode); static bool m68k_modes_tieable_p (machine_mode, machine_mode); @@ -336,6 +337,8 @@ static bool m68k_modes_tieable_p (machine_mode, machine_mode); #undef TARGET_ATOMIC_TEST_AND_SET_TRUEVAL #define TARGET_ATOMIC_TEST_AND_SET_TRUEVAL 128 +#undef TARGET_HARD_REGNO_NREGS +#define TARGET_HARD_REGNO_NREGS m68k_hard_regno_nregs #undef TARGET_HARD_REGNO_MODE_OK #define TARGET_HARD_REGNO_MODE_OK m68k_hard_regno_mode_ok @@ -5178,6 +5181,20 @@ m68k_hard_regno_rename_ok (unsigned int old_reg ATTRIBUTE_UNUSED, return 1; } +/* Implement TARGET_HARD_REGNO_NREGS. + + On the m68k, ordinary registers hold 32 bits worth; + for the 68881 registers, a single register is always enough for + anything that can be stored in them at all. */ + +static unsigned int +m68k_hard_regno_nregs (unsigned int regno, machine_mode mode) +{ + if (regno >= 16) + return GET_MODE_NUNITS (mode); + return CEIL (GET_MODE_SIZE (mode), UNITS_PER_WORD); +} + /* Implement TARGET_HARD_REGNO_MODE_OK. On the 68000, we let the cpu registers can hold any mode, but restrict the 68881 registers to floating-point modes. */ |