diff options
Diffstat (limited to 'gcc/config/sparc/sparc.h')
| -rw-r--r-- | gcc/config/sparc/sparc.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/config/sparc/sparc.h b/gcc/config/sparc/sparc.h index fd15297..4552132 100644 --- a/gcc/config/sparc/sparc.h +++ b/gcc/config/sparc/sparc.h @@ -2607,6 +2607,23 @@ do { \ || (CLASS1) == FPCC_REGS || (CLASS2) == FPCC_REGS) \ ? (sparc_cpu == PROCESSOR_ULTRASPARC ? 12 : 6) : 2) +/* Provide the cost of a branch. For pre-v9 processors we use + a value of 3 to take into account the potential annulling of + the delay slot (which ends up being a bubble in the pipeline slot) + plus a cycle to take into consideration the instruction cache + effects. + + On v9 and later, which have branch prediction facilities, we set + it to the depth of the pipeline as that is the cost of a + mispredicted branch. + + ??? Set to 9 when PROCESSOR_ULTRASPARC3 is added */ + +#define BRANCH_COST \ + ((sparc_cpu == PROCESSOR_V9 \ + || sparc_cpu == PROCESSOR_ULTRASPARC) \ + ? 7 : 3) + /* 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 `synth_mult' to find a synthetic multiply when reasonable. |