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| author | Jens Arnold <amiconn@rockbox.org> | 2005-10-20 19:56:32 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2005-10-20 19:56:32 +0000 |
| commit | ddad7197ed4d3c9db25bcbbcafd40ff82ad4b717 (patch) | |
| tree | 105c19a3347a5684d1bde1d9615f38e77557fa3b /apps/plugins/lib/gray_core.c | |
| parent | 4b2aa9830ef0bb79d1089f35a974cd7cfb592422 (diff) | |
| download | rockbox-ddad7197ed4d3c9db25bcbbcafd40ff82ad4b717.zip rockbox-ddad7197ed4d3c9db25bcbbcafd40ff82ad4b717.tar.gz rockbox-ddad7197ed4d3c9db25bcbbcafd40ff82ad4b717.tar.bz2 rockbox-ddad7197ed4d3c9db25bcbbcafd40ff82ad4b717.tar.xz | |
H1x0: Slight optimisation of the grayscale library.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7646 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/plugins/lib/gray_core.c')
| -rw-r--r-- | apps/plugins/lib/gray_core.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/apps/plugins/lib/gray_core.c b/apps/plugins/lib/gray_core.c index ed37f61..f132d00 100644 --- a/apps/plugins/lib/gray_core.c +++ b/apps/plugins/lib/gray_core.c @@ -562,7 +562,7 @@ void gray_update_rect(int x, int y, int width, int height) /* pop all 8 patterns */ "not.l %[mask] \n" /* set mask -> keep mask */ "and.l #0xFF,%[mask] \n" - "beq.b .ur_sloop \n" /* yes: jump to short loop */ + "beq.b .ur_sstart \n" /* yes: jump to short loop */ ".ur_floop: \n" /** full loop (there are bits to keep)**/ "clr.l %%d0 \n" @@ -599,6 +599,9 @@ void gray_update_rect(int x, int y, int width, int height) "bhi.b .ur_floop \n" /* no: loop */ "bra.b .ur_end \n" + + ".ur_sstart: \n" + "move.l %%a0,%[mask]\n" /* mask isn't needed here, reuse reg */ ".ur_sloop: \n" /** short loop (nothing to keep) **/ "clr.l %%d0 \n" @@ -612,10 +615,8 @@ void gray_update_rect(int x, int y, int width, int height) "addx.l %%d0,%%d0 \n" "lsr.l #1,%%d6 \n" "addx.l %%d0,%%d0 \n" - "move.l %%a0,%%d1 \n" - "lsr.l #1,%%d1 \n" + "lsr.l #1,%[mask] \n" "addx.l %%d0,%%d0 \n" - "move.l %%d1,%%a0 \n" "move.l %%a1,%%d1 \n" "lsr.l #1,%%d1 \n" "addx.l %%d0,%%d0 \n" |