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m68k.h (CONST_COSTS): Lower cost of 0.0 when used inside a COMPARE operator.

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* m68k.h (CONST_COSTS): Lower cost of 0.0 when used inside a
        COMPARE operator.

From-SVN: r50372
This commit is contained in:
Jeff Law 2002-03-06 12:25:13 -07:00 • committed by Jeff Law
parent 380ff1ef9d
commit 31d0dd4fa3
2 changed files with 11 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
Wed Mar 6 12:27:10 2002 Jeffrey A Law (law@redhat.com)
* m68k.h (CONST_COSTS): Lower cost of 0.0 when used inside a
COMPARE operator.
2002-03-06 Phil Edwards <pme@gcc.gnu.org>
* version.c: Fix misplaced leading blanks on first line.

6
gcc/config/m68k/m68k.h
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@ -1555,6 +1555,12 @@ __transfer_from_trampoline () \
case SYMBOL_REF: \
return 3; \
case CONST_DOUBLE: \
/* Make 0.0 cheaper than other floating constants to \
encourage creating tstsf and tstdf insns. */ \
if ((OUTER_CODE) == COMPARE \
&& ((RTX) == CONST0_RTX (SFmode) \
|| (RTX) == CONST0_RTX (DFmode))) \
return 4; \
return 5;
/* Compute the cost of various arithmetic operations.