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revert: i386.c (ix86_rtx_costs): For standard 80387 constants... 

Revert:
        2006-05-08  Uros Bizjak  <uros@kss-loka.si>
        * config/i386/i386.c (ix86_rtx_costs) [FLOAT_EXTEND]: For
        standard 80387 constants, raise the cost to prevent
        compress_float_constant() to generate load from memory.

        * config/i386/i386.md: Add new splitter pattern to split
        float_extended load of constant from constant pool into
        pure constant load.

From-SVN: r119246
This commit is contained in:
Uros Bizjak 2006-11-27 09:03:45 +01:00
parent 56c7f9c1d0
commit ce7d4645bb
3 changed files with 48 additions and 19 deletions
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18
gcc/ChangeLog
View File

@ -1,3 +1,15 @@
2006-11-27 Uros Bizjak <ubizjak@gmail.com>
Revert:
2006-05-08 Uros Bizjak <uros@kss-loka.si>
* config/i386/i386.c (ix86_rtx_costs) [FLOAT_EXTEND]: For
standard 80387 constants, raise the cost to prevent
compress_float_constant() to generate load from memory.
* config/i386/i386.md: Add new splitter pattern to split
float_extended load of constant from constant pool into
pure constant load.
2006-11-26 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* doc/install.texi: Move GMP/MPFR configure options from Fortran
@ -10,8 +22,8 @@
2006-11-26 Razya Ladklesky <razya@il.ibm.com>
* testsuite/gcc.dg/ipa/ipa-6.c: New.
* testsuite/gcc.dg/ipa/ipa-6.c: New.
2006-11-26 Razya Ladklesky <razya@il.ibm.com>
PR tree-optimization/29122
@ -2070,7 +2082,7 @@
2006-11-05 Kaz Kojima <kkojima@gcc.gnu.org>
* config/sh/lib1funcs-4-300.asm: Guard entire file with
#if !__SHMEDIA__ .
#if !__SHMEDIA__ .
2006-11-05 Jakub Jelinek <jakub@redhat.com>

17
gcc/config/i386/i386.c
View File

@ -17705,22 +17705,7 @@ ix86_rtx_costs (rtx x, int code, int outer_code, int *total)
if (!TARGET_SSE_MATH
|| mode == XFmode
|| (mode == DFmode && !TARGET_SSE2))
/* For standard 80387 constants, raise the cost to prevent
compress_float_constant() to generate load from memory. */
switch (standard_80387_constant_p (XEXP (x, 0)))
{
case -1:
case 0:
*total = 0;
break;
case 1: /* 0.0 */
*total = 1;
break;
default:
*total = (x86_ext_80387_constants & TUNEMASK
|| optimize_size
? 1 : 0);
}
*total = 0;
return false;
case ABS:

32
gcc/config/i386/i386.md
View File

@ -2906,6 +2906,38 @@
operands[1] = c;
})
(define_split
[(set (match_operand 0 "register_operand" "")
(float_extend (match_operand 1 "memory_operand" "")))]
"reload_completed
&& GET_CODE (operands[1]) == MEM
&& (GET_MODE (operands[0]) == XFmode
|| GET_MODE (operands[0]) == SFmode || GET_MODE (operands[0]) == DFmode)
&& constant_pool_reference_p (operands[1])"
[(set (match_dup 0) (match_dup 1))]
{
rtx c = avoid_constant_pool_reference (SET_SRC (PATTERN (curr_insn)));
rtx r = operands[0];
if (GET_CODE (r) == SUBREG)
r = SUBREG_REG (r);
if (SSE_REG_P (r))
{
if (!standard_sse_constant_p (c))
FAIL;
}
else if (FP_REG_P (r))
{
if (!standard_80387_constant_p (c))
FAIL;
}
else if (MMX_REG_P (r))
FAIL;
operands[1] = c;
})
(define_insn "swapxf"
[(set (match_operand:XF 0 "register_operand" "+f")
(match_operand:XF 1 "register_operand" "+f"))