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i386.md (cmpqi_minus_1): Use q constraints instead of r.

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* config/i386/i386.md (cmpqi_minus_1): Use q constraints instead of r.

	* gcc.c-torture/compile/20010117-2.c: New test.

From-SVN: r39093
This commit is contained in:
Jakub Jelinek 2001-01-17 13:32:49 +01:00 committed by Jakub Jelinek
parent 5efdd89028
commit d70401eb2f
4 changed files with 24 additions and 2 deletions
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1
gcc/ChangeLog
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@ -1,6 +1,7 @@
2001-01-17 Jakub Jelinek <jakub@redhat.com>
* config/i386/i386.md (cmpqi_minus_1): Use {b} for QImode operation.
Use q constraints instead of r.
Tue Jan 16 22:23:04 2001 Alan Modra (alan@linuxcare.com.au)

4
gcc/config/i386/i386.md
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@ -1154,8 +1154,8 @@
(define_insn "*cmpqi_minus_1"
[(set (reg 17)
(compare (minus:QI (match_operand:QI 0 "nonimmediate_operand" "rm,r")
(match_operand:QI 1 "general_operand" "ri,mr"))
(compare (minus:QI (match_operand:QI 0 "nonimmediate_operand" "qm,q")
(match_operand:QI 1 "general_operand" "qi,mq"))
(const_int 0)))]
"ix86_match_ccmode (insn, CCGOCmode)"
"cmp{b}\\t{%1, %0|%0, %1}"

1
gcc/testsuite/ChangeLog
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@ -1,6 +1,7 @@
2001-01-17 Jakub Jelinek <jakub@redhat.com>
* gcc.c-torture/compile/20010117-1.c: New test.
* gcc.c-torture/compile/20010117-2.c: New test.
2001-01-15 Toon Moene <toon@moene.indiv.nluug.nl>

20
gcc/testsuite/gcc.c-torture/compile/20010117-2.c Normal file
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@ -0,0 +1,20 @@
unsigned char a, b;
void baz (void)
{
if (b & 0x08)
{
int g = 0;
int c = (b & 0x01);
int d = a - g - c;
int e = (a & 0x0f) - (g & 0x0f);
int f = (a & 0xf0) - (g & 0xf0);
int h = (a & 0x0f) - (g & 0x0f);
if ((a ^ g) & (a ^ d) & 0x80) b |= 0x40;
if ((d & 0xff00) == 0) b |= 0x01;
if (!((a - h - c) & 0xff)) b |= 0x02;
if ((a - g - c) & 0x80) b |= 0x80;
a = (e & 0x0f) | (f & 0xf0);
}
}