From 5ba11af85595ff5bfa84bfb45151e59ce02e6309 Mon Sep 17 00:00:00 2001 From: Jens Arnold Date: Sun, 16 Nov 2008 10:12:38 +0000 Subject: Avoid unnecessary register copies on ARMv5. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19112 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/demac/libdemac/vector_math16_armv5te.h | 46 +++++++++++----------- 1 file changed, 22 insertions(+), 24 deletions(-) (limited to 'apps/codecs/demac/libdemac') diff --git a/apps/codecs/demac/libdemac/vector_math16_armv5te.h b/apps/codecs/demac/libdemac/vector_math16_armv5te.h index fef99d9061..a999c0333a 100644 --- a/apps/codecs/demac/libdemac/vector_math16_armv5te.h +++ b/apps/codecs/demac/libdemac/vector_math16_armv5te.h @@ -127,32 +127,30 @@ static inline int32_t scalarproduct(int16_t* v1, int16_t* v2) "beq 20f \n" "10: \n" - "ldrh r4, [%[v2]], #2 \n" - "mov r4, r4, lsl #16 \n" + "ldrh r7, [%[v2]], #2 \n" + "mov r7, r7, lsl #16 \n" "1: \n" "ldmia %[v1]!, {r0-r3} \n" - "ldmia %[v2]!, {r5-r8} \n" - "smlabt %[res], r0, r4, %[res] \n" - "smlatb %[res], r0, r5, %[res] \n" - "smlabt %[res], r1, r5, %[res] \n" - "smlatb %[res], r1, r6, %[res] \n" - "smlabt %[res], r2, r6, %[res] \n" - "smlatb %[res], r2, r7, %[res] \n" - "smlabt %[res], r3, r7, %[res] \n" - "smlatb %[res], r3, r8, %[res] \n" - "mov r4, r8 \n" + "smlabt %[res], r0, r7, %[res] \n" + "ldmia %[v2]!, {r4-r7} \n" + "smlatb %[res], r0, r4, %[res] \n" + "smlabt %[res], r1, r4, %[res] \n" + "smlatb %[res], r1, r5, %[res] \n" + "smlabt %[res], r2, r5, %[res] \n" + "smlatb %[res], r2, r6, %[res] \n" + "smlabt %[res], r3, r6, %[res] \n" + "smlatb %[res], r3, r7, %[res] \n" "ldmia %[v1]!, {r0-r3} \n" - "ldmia %[v2]!, {r5-r8} \n" - "smlabt %[res], r0, r4, %[res] \n" - "smlatb %[res], r0, r5, %[res] \n" - "smlabt %[res], r1, r5, %[res] \n" - "smlatb %[res], r1, r6, %[res] \n" - "smlabt %[res], r2, r6, %[res] \n" - "smlatb %[res], r2, r7, %[res] \n" - "smlabt %[res], r3, r7, %[res] \n" - "smlatb %[res], r3, r8, %[res] \n" + "smlabt %[res], r0, r7, %[res] \n" + "ldmia %[v2]!, {r4-r7} \n" + "smlatb %[res], r0, r4, %[res] \n" + "smlabt %[res], r1, r4, %[res] \n" + "smlatb %[res], r1, r5, %[res] \n" + "smlabt %[res], r2, r5, %[res] \n" + "smlatb %[res], r2, r6, %[res] \n" + "smlabt %[res], r3, r6, %[res] \n" + "smlatb %[res], r3, r7, %[res] \n" #if ORDER > 16 - "mov r4, r8 \n" "subs %[cnt], %[cnt], #1 \n" "bne 1b \n" #endif @@ -195,8 +193,8 @@ static inline int32_t scalarproduct(int16_t* v1, int16_t* v2) [res]"+r"(res) : /* inputs */ : /* clobbers */ - "r0", "r1", "r2", "r3", "r4", - "r5", "r6", "r7", "r8" + "r0", "r1", "r2", "r3", + "r4", "r5", "r6", "r7" ); return res; } -- cgit v1.2.3