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| author | Jeff Law <law@redhat.com> | 2002-03-06 12:25:13 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2002-03-06 12:25:13 -0700 |
| commit | 31d0dd4fa30cbe7fc65d3e27461833c0bcca757a (patch) | |
| tree | 5fad19b06223462340f11e6eeffad73b76a8364c /gcc | |
| parent | 380ff1ef9dea81a89b894e2244a8d8d16814f2ba (diff) | |
| download | gcc-31d0dd4fa30cbe7fc65d3e27461833c0bcca757a.zip gcc-31d0dd4fa30cbe7fc65d3e27461833c0bcca757a.tar.gz gcc-31d0dd4fa30cbe7fc65d3e27461833c0bcca757a.tar.bz2 | |
m68k.h (CONST_COSTS): Lower cost of 0.0 when used inside a COMPARE operator.
* m68k.h (CONST_COSTS): Lower cost of 0.0 when used inside a
COMPARE operator.
From-SVN: r50372
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/m68k/m68k.h | 6 |
2 files changed, 11 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 778b934..ff9a8dc 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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. diff --git a/gcc/config/m68k/m68k.h b/gcc/config/m68k/m68k.h index 1f21ba9..9d89fe7 100644 --- a/gcc/config/m68k/m68k.h +++ b/gcc/config/m68k/m68k.h @@ -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. |