summaryrefslogtreecommitdiffstats
path: root/firmware/target/coldfire
diff options
context:
space:
mode:
authorThomas Martitz <kugel@rockbox.org>2012-01-06 06:26:48 +0100
committerThomas Martitz <kugel@rockbox.org>2012-01-22 18:46:45 +0100
commit3c17f28eca86ff3ee9e7cef6c4d5198c27b7c03c (patch)
tree672ee79463fc3c20c186f6d34ebd88cbe430c662 /firmware/target/coldfire
parent991ae1e39553172a7dd6cd8c634aebfce892e261 (diff)
downloadrockbox-3c17f28eca86ff3ee9e7cef6c4d5198c27b7c03c.tar.gz
rockbox-3c17f28eca86ff3ee9e7cef6c4d5198c27b7c03c.zip
Move pcm_mixer helper routines to firmware/asm.
Diffstat (limited to 'firmware/target/coldfire')
-rw-r--r--firmware/target/coldfire/pcm-mixer-coldfire.c134
1 files changed, 0 insertions, 134 deletions
diff --git a/firmware/target/coldfire/pcm-mixer-coldfire.c b/firmware/target/coldfire/pcm-mixer-coldfire.c
deleted file mode 100644
index d8318fffaf..0000000000
--- a/firmware/target/coldfire/pcm-mixer-coldfire.c
+++ /dev/null
@@ -1,134 +0,0 @@
-/***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id$
- *
- * Copyright (C) 2011 by Michael Sevakis
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ****************************************************************************/
-
-#define MIXER_OPTIMIZED_MIX_SAMPLES
-#define MIXER_OPTIMIZED_WRITE_SAMPLES
-static struct emac_context
-{
- unsigned long r[4];
-} emac_context IBSS_ATTR;
-
-/* Save emac context affected in ISR */
-static FORCE_INLINE void save_emac_context(void)
-{
- asm volatile (
- "move.l %%macsr, %%d0 \n"
- "move.l %%accext01, %%d1 \n"
- "movclr.l %%acc0, %%a0 \n"
- "movclr.l %%acc1, %%a1 \n"
- "movem.l %%d0-%%d1/%%a0-%%a1, (%0) \n"
- :
- : "a"(&emac_context)
- : "d0", "d1", "a0", "a1");
-}
-
-/* Restore emac context affected in ISR */
-static FORCE_INLINE void restore_emac_context(void)
-{
- asm volatile (
- "movem.l (%0), %%d0-%%d1/%%a0-%%a1 \n"
- "move.l %%a1, %%acc1 \n"
- "move.l %%a0, %%acc0 \n"
- "move.l %%d1, %%accext01 \n"
- "move.l %%d0, %%macsr \n"
- :
- : "a"(&emac_context)
- : "d0", "d1", "a0", "a1");
-}
-
-/* Mix channels' samples and apply gain factors */
-static FORCE_INLINE void mix_samples(void *out,
- void *src0,
- int32_t src0_amp,
- void *src1,
- int32_t src1_amp,
- size_t size)
-{
- uint32_t s0, s1, s2, s3;
- save_emac_context();
- coldfire_set_macsr(EMAC_ROUND | EMAC_SATURATE);
-
- asm volatile (
- "move.l (%1)+, %5 \n"
- "1: \n"
- "movea.w %5, %4 \n"
- "asr.l %10, %5 \n"
- "mac.l %4, %8, %%acc0 \n"
- "mac.l %5, %8, (%2)+, %5, %%acc1 \n"
- "movea.w %5, %4 \n"
- "asr.l %10, %5 \n"
- "mac.l %4, %9, %%acc0 \n"
- "mac.l %5, %9, (%1)+, %5, %%acc1 \n"
- "movclr.l %%acc0, %6 \n"
- "movclr.l %%acc1, %7 \n"
- "swap.w %6 \n"
- "move.w %6, %7 \n"
- "move.l %7, (%0)+ \n"
- "subq.l #4, %3 \n"
- "bhi.b 1b \n"
- : "+a"(out), "+a"(src0), "+a"(src1), "+d"(size),
- "=&a"(s0), "=&d"(s1), "=&d"(s2), "=&d"(s3)
- : "r"(src0_amp), "r"(src1_amp), "d"(16)
- );
-
- restore_emac_context();
-}
-
-/* Write channel's samples and apply gain factor */
-static FORCE_INLINE void write_samples(void *out,
- void *src,
- int32_t amp,
- size_t size)
-{
- if (LIKELY(amp == MIX_AMP_UNITY))
- {
- /* Channel is unity amplitude */
- memcpy(out, src, size);
- }
- else
- {
- /* Channel needs amplitude cut */
- uint32_t s0, s1, s2, s3;
- save_emac_context();
- coldfire_set_macsr(EMAC_ROUND | EMAC_SATURATE);
-
- asm volatile (
- "move.l (%1)+, %4 \n"
- "1: \n"
- "movea.w %4, %3 \n"
- "asr.l %8, %4 \n"
- "mac.l %3, %7, %%acc0 \n"
- "mac.l %4, %7, (%1)+, %4, %%acc1 \n"
- "movclr.l %%acc0, %5 \n"
- "movclr.l %%acc1, %6 \n"
- "swap.w %5 \n"
- "move.w %5, %6 \n"
- "move.l %6, (%0)+ \n"
- "subq.l #4, %2 \n"
- "bhi.b 1b \n"
- : "+a"(out), "+a"(src), "+d"(size),
- "=&a"(s0), "=&d"(s1), "=&d"(s2), "=&d"(s3)
- : "r"(amp), "d"(16)
- );
-
- restore_emac_context();
- }
-}