d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Micro-optimize OFW syscons 8-bit blank.

Browse Source 
MFC after:	1 week
This commit is contained in:
Justin Hibbits 2013-08-06 03:09:44 +00:00
parent a3b2cab451
commit 98a737cf8f
1 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
sys/powerpc/ofw/ofw_syscons.c
View File

@ -586,14 +586,22 @@ ofwfb_blank_display8(video_adapter_t *adp, int mode)
{
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;
/* 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);
/* 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));
for (i = 0; i < end; i++)
*(addr + i) = color;
return (0);
}