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remove earlyclobber constraint from extendqisi2_insn 

From-SVN: r21471
This commit is contained in:
Nick Clifton 1998-07-29 14:11:16 +00:00 committed by Nick Clifton
parent 53fdbb3b36
commit e0d75375e7
2 changed files with 13 additions and 3 deletions
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5
gcc/ChangeLog
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@ -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,

11
gcc/config/arm/thumb.md
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@ -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.