diff options
| author | Jeff Law <law@gcc.gnu.org> | 1993-01-17 11:07:59 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1993-01-17 11:07:59 -0700 |
| commit | 5de7c240a0d46a902633f88e5bf5e3ec7200559c (patch) | |
| tree | 9794e80978c23a9a3e596b777be49921df9cb679 /gcc | |
| parent | f133af4c9179bcd44c02c90cbde0efb7a06d3a5e (diff) | |
| download | gcc-5de7c240a0d46a902633f88e5bf5e3ec7200559c.zip gcc-5de7c240a0d46a902633f88e5bf5e3ec7200559c.tar.gz gcc-5de7c240a0d46a902633f88e5bf5e3ec7200559c.tar.bz2 | |
pa.h (FP_REG_CLASS_P): New macro.
* pa.h (FP_REG_CLASS_P): New macro.
(REGISTER_MOVE_COST): Use FP_REG_CLASS_P to simplify. Make
copies from the SAR so expensive that they should never happen.
From-SVN: r3259
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/pa/pa.h | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h index 14257e5..40d1929 100644 --- a/gcc/config/pa/pa.h +++ b/gcc/config/pa/pa.h @@ -561,6 +561,9 @@ enum reg_class { NO_REGS, R1_REGS, GENERAL_REGS, FP_REGS, GENERAL_OR_FP_REGS, #define INDEX_REG_CLASS GENERAL_REGS #define BASE_REG_CLASS GENERAL_REGS +#define FP_REG_CLASS_P(CLASS) \ + (CLASS == FP_REGS || CLASS == SNAKE_FP_REGS || CLASS == HI_SNAKE_FP_REGS) + /* Get reg_class from a letter such as appears in the machine description. */ #define REG_CLASS_FROM_LETTER(C) \ @@ -1479,16 +1482,20 @@ while (0) (GET_CODE (RTX) == REG ? 1 : hppa_address_cost (RTX)) /* Compute extra cost of moving data between one register class - and another. */ + and another. + + Make moves from SAR so expensive they should never happen. + + Copies involving a FP register and a non-FP register are relatively + expensive because they must go through memory. + + Other copies are reasonably cheap. */ #define REGISTER_MOVE_COST(CLASS1, CLASS2) \ - ((((CLASS1 == FP_REGS || CLASS1 == SNAKE_FP_REGS \ - || CLASS1 == HI_SNAKE_FP_REGS) \ - && (CLASS2 == R1_REGS || CLASS2 == GENERAL_REGS \ - || CLASS2 == SHIFT_REGS)) \ - || ((CLASS1 == R1_REGS || CLASS1 == GENERAL_REGS \ - || CLASS1 == SHIFT_REGS) \ - && (CLASS2 == FP_REGS || CLASS2 == SNAKE_FP_REGS \ - || CLASS2 == HI_SNAKE_FP_REGS))) ? 16 : 2) + (CLASS1 == SHIFT_REGS ? 0xffff \ + : FP_REG_CLASS_P (CLASS1) && ! FP_REG_CLASS_P (CLASS2) ? 16 \ + : FP_REG_CLASS_P (CLASS2) && ! FP_REG_CLASS_P (CLASS1) ? 16 \ + : 2) + /* Provide the costs of a rtl expression. This is in the body of a switch on CODE. The purpose for the cost of MULT is to encourage |