target/7248: gcc 2.95.3 for m68k generates broken "inclusive or" code
martin@blom.org
martin@blom.org
Tue Jul 9 12:36:00 GMT 2002
>Number: 7248
>Category: target
>Synopsis: gcc 2.95.3 for m68k generates broken "inclusive or" code
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: wrong-code
>Submitter-Id: net
>Arrival-Date: Tue Jul 09 12:36:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: martin@blom.org
>Release: gcc version 2.95.3 20010315 (release)
>Organization:
>Environment:
AmigaOS or Linux cross compiler.
>Description:
The following test example outputs 0000000a:00000000 instead
of 0000000a:ffffffff as one would expect.
#include <stdio.h>
typedef unsigned long long Fixed64;
void
test( int a )
{
Fixed64 f = ( (Fixed64) a << 32) | 0xffffffffULL;
printf( "%08x:%08x\n", (long) (f >> 32), (long) (f & 0xffffffffULL) );
}
int
main( void )
{
test( 10 );
}
>How-To-Repeat:
>Fix:
--- config/m68k/m68k.md.orig Tue Jul 9 21:03:52 2002 +++ config/m68k/m68k.md Tue Jul 9 21:03:55 2002
@@ -3813,23 +3813,23 @@
if (GET_CODE (operands[0]) == REG)
operands[0] = gen_rtx_REG (SImode, REGNO (operands[0]) + 1);
else
operands[0] = adj_offsettable_operand (operands[0], 4);
switch (INTVAL (lo))
{
case 0 :
break; case -1 : /* FIXME : a scratch register would be welcome here if operand[0] is not a register */
- output_asm_insn (\"move%.l %#-1,%R0\", operands);
+ output_asm_insn (\"move%.l %#-1,%0\", operands);
break; default :
{ rtx xoperands[3];
xoperands[0] = operands[0];
xoperands[2] = lo;
output_asm_insn (output_iorsi3 (xoperands), xoperands);
}
}
return \"\";
>Release-Note:
>Audit-Trail:
>Unformatted:
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