[PATCH] ARM: Fix VFP to use do_div()
VFP used __divdi3 64-bit division needlessly. Convert it to use
our 64-bit by 32-bit division instead.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/vfp/vfp.h b/arch/arm/vfp/vfp.h
index 55a02bc..4b97950 100644
--- a/arch/arm/vfp/vfp.h
+++ b/arch/arm/vfp/vfp.h
@@ -117,7 +117,13 @@
if (nh >= m)
return ~0ULL;
mh = m >> 32;
- z = (mh << 32 <= nh) ? 0xffffffff00000000ULL : (nh / mh) << 32;
+ if (mh << 32 <= nh) {
+ z = 0xffffffff00000000ULL;
+ } else {
+ z = nh;
+ do_div(z, mh);
+ z <<= 32;
+ }
mul64to128(&termh, &terml, m, z);
sub128(&remh, &reml, nh, nl, termh, terml);
ml = m << 32;
@@ -126,7 +132,12 @@
add128(&remh, &reml, remh, reml, mh, ml);
}
remh = (remh << 32) | (reml >> 32);
- z |= (mh << 32 <= remh) ? 0xffffffff : remh / mh;
+ if (mh << 32 <= remh) {
+ z |= 0xffffffff;
+ } else {
+ do_div(remh, mh);
+ z |= remh;
+ }
return z;
}