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| author | Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> | 1998-08-17 08:25:31 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-08-17 02:25:31 -0600 |
| commit | 38198304ccb559a021fe5abbe91a5191d8cf5f0e (patch) | |
| tree | bf260083239587c93c7342d2b98ef0d7a1d9e7f9 /gcc | |
| parent | 3f9a83a91b7fe23514b34c1f20be785ce935ba9b (diff) | |
| download | gcc-38198304ccb559a021fe5abbe91a5191d8cf5f0e.zip gcc-38198304ccb559a021fe5abbe91a5191d8cf5f0e.tar.gz gcc-38198304ccb559a021fe5abbe91a5191d8cf5f0e.tar.bz2 | |
m68k.c (output_move_simode_const): Use subl to move a zero into an address register.
* m68k.c (output_move_simode_const): Use subl to move a zero into an
address register.
(output_move_[hq]imode): Likewise.
From-SVN: r21778
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/m68k/m68k.c | 8 |
2 files changed, 14 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 823fbe9..afd7974 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +Mon Aug 17 09:23:42 1998 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> + + * m68k.c (output_move_simode_const): Use subl to move a zero into an + address register. + (output_move_[hq]imode): Likewise. + Mon Aug 17 09:15:47 1998 Jeffrey A Law (law@cygnus.com) * toplev.c (main): Enable -fstrict-aliasing for -O2 and above. diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c index 64bbe4a..1cfe3b2 100644 --- a/gcc/config/m68k/m68k.c +++ b/gcc/config/m68k/m68k.c @@ -1507,6 +1507,9 @@ output_move_simode_const (operands) || !(GET_CODE (operands[0]) == MEM && MEM_VOLATILE_P (operands[0])))) return "clr%.l %0"; + else if (operands[1] == const0_rtx + && ADDRESS_REG_P (operands[0])) + return "sub%.l %0,%0"; else if (DATA_REG_P (operands[0])) return output_move_const_into_data_reg (operands); else if (ADDRESS_REG_P (operands[0]) @@ -1554,6 +1557,9 @@ output_move_himode (operands) || !(GET_CODE (operands[0]) == MEM && MEM_VOLATILE_P (operands[0])))) return "clr%.w %0"; + else if (operands[1] == const0_rtx + && ADDRESS_REG_P (operands[0])) + return "sub%.l %0,%0"; else if (DATA_REG_P (operands[0]) && INTVAL (operands[1]) < 128 && INTVAL (operands[1]) >= -128) @@ -1668,6 +1674,8 @@ output_move_qimode (operands) return "moveq %1,%0"; #endif } + if (operands[1] == const0_rtx && ADDRESS_REG_P (operands[0])) + return "sub%.l %0,%0"; if (GET_CODE (operands[1]) != CONST_INT && CONSTANT_P (operands[1])) return "move%.l %1,%0"; /* 68k family doesn't support byte moves to from address registers. The |