From: Shan Hai <shan.hai@windriver.com>
Date: Wed, 17 Nov 2010 02:28:53 +0000 (+0800)
Subject: powerpc/85xx: Fix SPE float to integer conversion failure
X-Git-Tag: v2.6.39-rc1~430^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=afc0a07d4a283599ac3a6a31d7454e9baaeccca0;p=pandora-kernel.git

powerpc/85xx: Fix SPE float to integer conversion failure

Conversion from float to integer should based on both the instruction
encoding and the sign of the operand.

A simple testcase to show the issue:

static float fm;
static signed int si_min = (-2147483647 - 1);
static unsigned int ui;
int main()
{
       fm = (float) si_min; ;
       ui = (unsigned int)fm;
       printf("ui=%d, should be %d\n", ui, si_min);

       return 0;
}
Result: ui=-1, should be -2147483648

Signed-off-by: Shan Hai <shan.hai@windriver.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---

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