diff options
| author | Stan Cox <coxs@gnu.org> | 1996-08-02 21:27:07 +0000 |
|---|---|---|
| committer | Stan Cox <coxs@gnu.org> | 1996-08-02 21:27:07 +0000 |
| commit | 804a8ee0f5472206a89b2fe3f958a35c0b49adf5 (patch) | |
| tree | ea311272e6c81d4eafd2f08c59f79d2a48ac3287 | |
| parent | e2a606cb27a100bb5fd96dcd62da9b2c1e2f4b57 (diff) | |
| download | gcc-804a8ee0f5472206a89b2fe3f958a35c0b49adf5.zip gcc-804a8ee0f5472206a89b2fe3f958a35c0b49adf5.tar.gz gcc-804a8ee0f5472206a89b2fe3f958a35c0b49adf5.tar.bz2 | |
(output_float_compare): fcomi should be followed by the correct conditional jump instead of fcom/pfstsw/and/jne
(output_float_compare): fcomi should be followed by the
correct conditional jump instead of fcom/pfstsw/and/jne
(override_options): Added -mbranch-cost to set BRANCH_COST.
From-SVN: r12585
| -rw-r--r-- | gcc/config/i386/i386.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 4499248..8a84fe1 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -143,10 +143,12 @@ int i386_regparm; /* i386_regparm_string as a number */ char *i386_align_loops_string; /* power of two alignment for loops */ char *i386_align_jumps_string; /* power of two alignment for non-loop jumps */ char *i386_align_funcs_string; /* power of two alignment for functions */ +char *i386_branch_cost_string; /* values 1-5: see jump.c */ int i386_align_loops; /* power of two alignment for loops */ int i386_align_jumps; /* power of two alignment for non-loop jumps */ int i386_align_funcs; /* power of two alignment for functions */ +int i386_branch_cost; /* values 1-5: see jump.c */ /* Sometimes certain combinations of command options do not make sense on a particular target machine. You can define a macro @@ -293,6 +295,17 @@ override_options () else i386_align_funcs = def_align; + /* Validate -mbranch-cost= value, or provide default */ + if (i386_branch_cost_string) + { + i386_branch_cost = atoi (i386_branch_cost_string); + if (i386_branch_cost < 0 || i386_branch_cost > 5) + fatal ("-mbranch-cost=%d is not between 0 and 5", + i386_branch_cost); + } + else + i386_branch_cost = TARGET_PENTIUMPRO ? 4 : 1; + if (TARGET_OMIT_LEAF_FRAME_POINTER) /* keep nonleaf frame pointers */ flag_omit_frame_pointer = 1; @@ -3549,6 +3562,7 @@ output_float_compare (insn, operands) rtx body = XVECEXP (PATTERN (insn), 0, 0); int unordered_compare = GET_MODE (SET_SRC (body)) == CCFPEQmode; int target_fcomi = TARGET_CMOVE && STACK_REG_P (operands[1]); + int target_fcomi = TARGET_CMOVE && STACK_REG_P (operands[1]); rtx tmp; if (! STACK_TOP_P (operands[0])) @@ -3598,6 +3612,13 @@ output_float_compare (insn, operands) strcat (buf, "p"); if (NON_STACK_REG_P (operands[1])) + else if (target_fcomi) + { + rtx xops[] = {operands[0], operands[1], operands[0]}; + + output_asm_insn (strcat (buf, AS2 (%z1,%y1,%2)), xops); + RET; + } output_op_from_reg (operands[1], strcat (buf, AS1 (%z0,%1))); else if (target_fcomi) { |