From owner-cvs-all  Tue Jan  9 22: 4:31 2001
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Date: Tue, 9 Jan 2001 22:04:03 -0800 (PST)
From: Matthew Jacob <mjacob@feral.com>
Reply-To: mjacob@feral.com
To: Warner Losh <imp@harmony.village.org>
Cc: Matt Jacob <mjacob@FreeBSD.org>, cvs-committers@FreeBSD.org,
	cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/alpha/include bus.h 
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> In message <200101091817.f09IHng10622@freefall.freebsd.org> Matt Jacob writes:
> :   me that BUS_SPACE_UNRESTRICTED should b ~0UL, not ~0.
> 
> Would this impact the 10E6 uses of ~0 in the bus_alloc_resource calls
> we have?

int foo()
{
        bar(~0);
}
int zoo()
{
        bar1(~0UL);
}

yields (for alpha, with -O):

        .file   1 "x.c"
        .version        "01.01"
        .set noat
gcc2_compiled.:
.text
        .align 5
        .globl foo
        .ent foo
foo:
        .frame $30,16,$26,0
        .mask 0x4000000,-16
        ldgp $29,0($27)
$foo..ng:
        lda $30,-16($30)
        stq $26,0($30)
        .prologue 1
        lda $16,-1
        jsr $26,bar
        ldgp $29,0($26)
        ldq $26,0($30)
        lda $30,16($30)
        ret $31,($26),1
        .end foo
        .align 5
        .globl zoo
        .ent zoo
zoo:
        .frame $30,16,$26,0
        .mask 0x4000000,-16
        ldgp $29,0($27)
$zoo..ng:
        lda $30,-16($30)
        stq $26,0($30)
        .prologue 1
        lda $16,-1
        jsr $26,bar1
        ldgp $29,0($26)
        ldq $26,0($30)
        lda $30,16($30)
        ret $31,($26),1
        .end zoo
        .ident  "GCC: (GNU) 2.95.3 20010101 (prerelease)"

Sorta looks the same to me....

-matt




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