Author: jhibbits
Date: Tue Aug 6 03:09:44 2013
New Revision: 253979
URL: http://svnweb.freebsd.org/changeset/base/253979
Log:
Micro-optimize OFW syscons 8-bit blank.
MFC after: 1 week
Modified:
head/sys/powerpc/ofw/ofw_syscons.c
Modified: head/sys/powerpc/ofw/ofw_syscons.c
==============================================================================
--- head/sys/powerpc/ofw/ofw_syscons.c Tue Aug 6 02:58:16 2013
(r253978)
+++ head/sys/powerpc/ofw/ofw_syscons.c Tue Aug 6 03:09:44 2013
(r253979)
@@ -586,14 +586,22 @@ ofwfb_blank_display8(video_adapter_t *ad
{
struct ofwfb_softc *sc;
int i;
- uint8_t *addr;
+ uint32_t *addr;
+ uint32_t color;
+ uint32_t end;
sc = (struct ofwfb_softc *)adp;
- addr = (uint8_t *) sc->sc_addr;
+ addr = (uint32_t *) sc->sc_addr;
+ end = (sc->sc_stride/4) * sc->sc_height;
+
+ /* Splat 4 pixels at once. */
+ color = (ofwfb_background(SC_NORM_ATTR) << 24) |
+ (ofwfb_background(SC_NORM_ATTR) << 16) |
+ (ofwfb_background(SC_NORM_ATTR) << 8) |
+ (ofwfb_background(SC_NORM_ATTR));
- /* Could be done a lot faster e.g. 32-bits, or Altivec'd */
- for (i = 0; i < sc->sc_stride*sc->sc_height; i++)
- *(addr + i) = ofwfb_background(SC_NORM_ATTR);
+ for (i = 0; i < end; i++)
+ *(addr + i) = color;
return (0);
}
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