Article View: gnu.gcc.bug
Article #1805'386 gcc bug for 1.28
From: Jon Zeeff
Date: Sun, 16 Oct 1988 15:46
Date: Sun, 16 Oct 1988 15:46
34 lines
1022 bytes
1022 bytes
The following code produces an invalid instruction:
static unsigned short
newh(pred, foll) /* new hash function */
unsigned short pred; /* code for preceeding string */
unsigned char foll; /* value of following char */
{
return (((pred + foll) & 0xFFFF) * 15073) & 0xFFF; /* faster hash */
}
newh:
pushl %ebp
movl %esp,%ebp
pushl %ebx
movw 8(%ebp),%dx
movw %dx,8(%ebp)
movb 12(%ebp),%dl
movb %dl,12(%ebp)
movzbw 12(%ebp),%bx
addw 8(%ebp),%bx
imulw $15073,%bx <- error
andw $4095,%bx
movzwl %bx,%eax
jmp .L79
.L79:
leal -4(%ebp),%esp
popl %ebx
leave
ret
.align 4
--
Jon Zeeff Branch Technology,
umix!b-tech!zeeff zeeff@b-tech.ann-arbor.mi.us
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Path: arc1-ca.pugleaf.net!utzoo!telly!ddsw1!mcdchg!rutgers!mailrus!umix!b-tech!zeeff From: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff) Newsgroups: gnu.gcc.bug Subject: '386 gcc bug for 1.28 Message-ID: <4871@b-tech.ann-arbor.mi.us> Date: 16 Oct 88 15:46:12 GMT Organization: Branch Technology, Ann Arbor, MI Lines: 34