OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

(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
This commit is contained in:
Stan Cox 1996-08-02 21:27:07 +00:00
parent e2a606cb27
commit 804a8ee0f5
1 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
gcc/config/i386/i386.c
View File

@ -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)
{