On 2013-04-08 00:17, Martin Husemann wrote:
On Sun, Apr 07, 2013 at 09:49:39PM +0200, Johnny Billquist wrote:In my eyes that definitely looks like a gas bug. Why would gas generate 8f ff ff ff ff 00 00 00 00 for the immediate value -1 for a quad? That is not -1. That's a zero-extended 32-bit -1 into a 64-bit value. Do gas regard the immediate value as unsigned?Looking at gas/confg/tc-vax.c:vip surely makes my eyes bleed. Anyone can test with a non-gnu assembler?
MACRO-32:
0000 1 .TITLE TEST
0000 2
00000000 3 .PSECT TEST
0000 4
00000000 FFFFFFFF 8F FC AD 79 0000 5 ASHQ
-4(FP),#-1,-12(fp)
F4 AD 000C
000E 6
000E 7 .END
However, I'm pretty sure that unless I say otherwise, values are 32-bit
unsigned in MACRO-32, so I'm not sure how this helps.
Hmm, it might be that gas also explicitly have that immediate values are unsigned 32 bit, in which case I guess I should blame gcc after all, if it assumes that a "-1" should be sign extended to 64 bits...
Johnny
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