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| author | Jens Arnold <amiconn@rockbox.org> | 2007-07-19 21:24:47 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2007-07-19 21:24:47 +0000 |
| commit | f888509dad5771bfe4e464cda836928be037512f (patch) | |
| tree | f333550d93f3dd8a3a41f91b3d4c2bb62bb08c22 /firmware/target/coldfire | |
| parent | b8bd1ee557c58119178715a15f98dfcb56c80dee (diff) | |
| download | rockbox-f888509dad5771bfe4e464cda836928be037512f.tar.gz rockbox-f888509dad5771bfe4e464cda836928be037512f.zip | |
Slight speedup for iAudio remote LCD update when the CPU isn't boosted.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13932 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/coldfire')
| -rw-r--r-- | firmware/target/coldfire/iaudio/lcd-remote-iaudio.c | 45 |
1 files changed, 20 insertions, 25 deletions
diff --git a/firmware/target/coldfire/iaudio/lcd-remote-iaudio.c b/firmware/target/coldfire/iaudio/lcd-remote-iaudio.c index 139ebbc2a3..939f7347c4 100644 --- a/firmware/target/coldfire/iaudio/lcd-remote-iaudio.c +++ b/firmware/target/coldfire/iaudio/lcd-remote-iaudio.c @@ -172,77 +172,72 @@ static inline void _write_fast(unsigned data) "swap %[data] \n" /* Shift data to upper byte */ "lsl.l #8, %[data] \n" + "move.l %%d0, %%d1 \n" /* precalculate opposite state of clock line */ + "eor.l %[cbit], %%d1 \n" + "lsl.l #1,%[data] \n" /* Shift out MSB */ "bcc.s 1f \n" "eor.l %[dbit], %%d0 \n" /* 1: Flip data bit */ + "eor.l %[dbit], %%d1 \n" /* for both clock states */ "1: \n" - "eor.l %[cbit], %%d0 \n" /* Flip clock bit */ - "move.l %%d0, (%[gpo0]) \n" /* Output new state */ - "eor.l %[cbit], %%d0 \n" /* Flip clock bit */ - "move.l %%d0, (%[gpo0]) \n" /* Output new state */ + "move.l %%d1, (%[gpo0]) \n" /* Output new state and set CLK */ + "move.l %%d0, (%[gpo0]) \n" /* reset CLK */ "lsl.l #1,%[data] \n" /* ..unrolled.. */ "bcc.s 1f \n" "eor.l %[dbit], %%d0 \n" + "eor.l %[dbit], %%d1 \n" "1: \n" - "eor.l %[cbit], %%d0 \n" - "move.l %%d0, (%[gpo0]) \n" - "eor.l %[cbit], %%d0 \n" + "move.l %%d1, (%[gpo0]) \n" "move.l %%d0, (%[gpo0]) \n" "lsl.l #1,%[data] \n" "bcc.s 1f \n" "eor.l %[dbit], %%d0 \n" + "eor.l %[dbit], %%d1 \n" "1: \n" - "eor.l %[cbit], %%d0 \n" - "move.l %%d0, (%[gpo0]) \n" - "eor.l %[cbit], %%d0 \n" + "move.l %%d1, (%[gpo0]) \n" "move.l %%d0, (%[gpo0]) \n" "lsl.l #1,%[data] \n" "bcc.s 1f \n" "eor.l %[dbit], %%d0 \n" + "eor.l %[dbit], %%d1 \n" "1: \n" - "eor.l %[cbit], %%d0 \n" - "move.l %%d0, (%[gpo0]) \n" - "eor.l %[cbit], %%d0 \n" + "move.l %%d1, (%[gpo0]) \n" "move.l %%d0, (%[gpo0]) \n" "lsl.l #1,%[data] \n" "bcc.s 1f \n" "eor.l %[dbit], %%d0 \n" + "eor.l %[dbit], %%d1 \n" "1: \n" - "eor.l %[cbit], %%d0 \n" - "move.l %%d0, (%[gpo0]) \n" - "eor.l %[cbit], %%d0 \n" + "move.l %%d1, (%[gpo0]) \n" "move.l %%d0, (%[gpo0]) \n" "lsl.l #1,%[data] \n" "bcc.s 1f \n" "eor.l %[dbit], %%d0 \n" + "eor.l %[dbit], %%d1 \n" "1: \n" - "eor.l %[cbit], %%d0 \n" - "move.l %%d0, (%[gpo0]) \n" - "eor.l %[cbit], %%d0 \n" + "move.l %%d1, (%[gpo0]) \n" "move.l %%d0, (%[gpo0]) \n" "lsl.l #1,%[data] \n" "bcc.s 1f \n" "eor.l %[dbit], %%d0 \n" + "eor.l %[dbit], %%d1 \n" "1: \n" - "eor.l %[cbit], %%d0 \n" - "move.l %%d0, (%[gpo0]) \n" - "eor.l %[cbit], %%d0 \n" + "move.l %%d1, (%[gpo0]) \n" "move.l %%d0, (%[gpo0]) \n" "lsl.l #1,%[data] \n" "bcc.s 1f \n" "eor.l %[dbit], %%d0 \n" + "eor.l %[dbit], %%d1 \n" "1: \n" - "eor.l %[cbit], %%d0 \n" + "move.l %%d1, (%[gpo0]) \n" "move.l %%d0, (%[gpo0]) \n" - "eor.l %[cbit], %%d0 \n" - "move.l %%d0, (%[gpo0]) \n" "move.w %%d3, %%sr \n" /* Restore interrupt level */ : /* outputs */ |