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| author | Nick Clifton <nickc@cygnus.com> | 1998-07-29 14:11:16 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@gcc.gnu.org> | 1998-07-29 14:11:16 +0000 |
| commit | e0d75375e722d868b1544fe69b3cb2f7b35ce434 (patch) | |
| tree | f34d4167c0c8ebad49df2756bc19ddcdfc5ee4c9 /gcc | |
| parent | 53fdbb3b3697b6688745bcb2628eb1873f46cec0 (diff) | |
| download | gcc-e0d75375e722d868b1544fe69b3cb2f7b35ce434.zip gcc-e0d75375e722d868b1544fe69b3cb2f7b35ce434.tar.gz gcc-e0d75375e722d868b1544fe69b3cb2f7b35ce434.tar.bz2 | |
remove earlyclobber constraint from extendqisi2_insn
From-SVN: r21471
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/arm/thumb.md | 11 |
2 files changed, 13 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fc00c84..0b87938 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Wed Jul 29 11:47:10 1998 Nick Clifton <nickc@cygnus.com> + + * config/arm/thumb.md (extendqisi2_insn): Remove earlyclobber + constraint from second alternative. + Tue Jul 28 23:29:04 1998 Jason Merrill <jason@yorick.cygnus.com> * configure.in: Fix --without/--disable cases for local-prefix, diff --git a/gcc/config/arm/thumb.md b/gcc/config/arm/thumb.md index 6886b8e..0369bb1 100644 --- a/gcc/config/arm/thumb.md +++ b/gcc/config/arm/thumb.md @@ -470,7 +470,7 @@ ") (define_insn "*extendqisi2_insn" - [(set (match_operand:SI 0 "register_operand" "=l,&l") + [(set (match_operand:SI 0 "register_operand" "=l,l") (sign_extend:SI (match_operand:QI 1 "memory_operand" "V,m")))] "" "* @@ -484,16 +484,21 @@ { ops[1] = XEXP (XEXP (operands[1], 0), 0); ops[2] = XEXP (XEXP (operands[1], 0), 1); + output_asm_insn (\"ldrsb\\t%0, [%1, %2]\", ops); + } + else if (REGNO (operands[0]) == REGNO (XEXP (operands[1], 0))) + { + output_asm_insn (\"ldrb\\t%0, [%0, #0]\;lsl\\t%0, %0, #24\;asr\\t%0, %0, #24\", ops); } else { ops[1] = XEXP (operands[1], 0); ops[2] = const0_rtx; + output_asm_insn (\"mov\\t%0, %2\;ldrsb\\t%0, [%1, %0]\", ops); } - output_asm_insn (\"mov\\t%0, %2\;ldrsb\\t%0, [%1, %0]\", ops); return \"\"; }" -[(set_attr "length" "2,4")]) +[(set_attr "length" "2,6")]) ;; We don't really have extzv, but defining this using shifts helps ;; to reduce register pressure later on. |