From cd3850c1d97d3a21e53e79c0a7feb6f052feb181 Mon Sep 17 00:00:00 2001
From: "Timothy B. Terriberry" <tterribe@xiph.org>
Date: Wed, 22 May 2013 15:11:59 -0700
Subject: [PATCH] Port 1ed17cc2 to C_MUL and C_MUL4.
Measures a 0.1% speedup on 96 kbps stereo encode+decode on a
Cortex A8.
---
celt/arm/kiss_fft_armv4.h | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/celt/arm/kiss_fft_armv4.h b/celt/arm/kiss_fft_armv4.h
index 1f09eaba1..e4faad6f2 100644
--- a/celt/arm/kiss_fft_armv4.h
+++ b/celt/arm/kiss_fft_armv4.h
@@ -40,18 +40,18 @@
int tt__; \
__asm__ __volatile__( \
"#C_MUL\n\t" \
- "ldm %[ap], {r0,r1}\n\t" \
"ldrsh %[br], [%[bp], #0]\n\t" \
+ "ldm %[ap], {r0,r1}\n\t" \
"ldrsh %[bi], [%[bp], #2]\n\t" \
"smull %[tt], %[mi], r1, %[br]\n\t" \
"smlal %[tt], %[mi], r0, %[bi]\n\t" \
"rsb %[bi], %[bi], #0\n\t" \
- "smull r0, %[mr], %[br], r0\n\t" \
+ "smull %[br], %[mr], r0, %[br]\n\t" \
"mov %[tt], %[tt], lsr #15\n\t" \
- "smlal r0, %[mr], r1, %[bi]\n\t" \
+ "smlal %[br], %[mr], r1, %[bi]\n\t" \
"orr %[mi], %[tt], %[mi], lsl #17\n\t" \
- "mov r0, r0, lsr #15\n\t" \
- "orr %[mr], r0, %[mr], lsl #17\n\t" \
+ "mov %[br], %[br], lsr #15\n\t" \
+ "orr %[mr], %[br], %[mr], lsl #17\n\t" \
: [mr]"=r"((m).r), [mi]"=r"((m).i), \
[br]"=&r"(br__), [bi]"=r"(bi__), [tt]"=r"(tt__) \
: [ap]"r"(&(a)), [bp]"r"(&(b)) \
@@ -68,18 +68,18 @@
int tt__; \
__asm__ __volatile__( \
"#C_MUL4\n\t" \
- "ldm %[ap], {r0,r1}\n\t" \
"ldrsh %[br], [%[bp], #0]\n\t" \
+ "ldm %[ap], {r0,r1}\n\t" \
"ldrsh %[bi], [%[bp], #2]\n\t" \
"smull %[tt], %[mi], r1, %[br]\n\t" \
"smlal %[tt], %[mi], r0, %[bi]\n\t" \
"rsb %[bi], %[bi], #0\n\t" \
- "smull r0, %[mr], %[br], r0\n\t" \
+ "smull %[br], %[mr], r0, %[br]\n\t" \
"mov %[tt], %[tt], lsr #17\n\t" \
- "smlal r0, %[mr], r1, %[bi]\n\t" \
+ "smlal %[br], %[mr], r1, %[bi]\n\t" \
"orr %[mi], %[tt], %[mi], lsl #15\n\t" \
- "mov r0, r0, lsr #17\n\t" \
- "orr %[mr], r0, %[mr], lsl #15\n\t" \
+ "mov %[br], %[br], lsr #17\n\t" \
+ "orr %[mr], %[br], %[mr], lsl #15\n\t" \
: [mr]"=r"((m).r), [mi]"=r"((m).i), \
[br]"=&r"(br__), [bi]"=r"(bi__), [tt]"=r"(tt__) \
: [ap]"r"(&(a)), [bp]"r"(&(b)) \
--
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