From 6b84f600466ab02f5a671d5004cc5b13f18460af Mon Sep 17 00:00:00 2001 From: Jens Arnold Date: Tue, 7 Oct 2008 19:40:17 +0000 Subject: APE: Further ARMv6 filter optimisations: Save 4 'ror's per round by utilising the shift feature of the 'pack halfword' instructions in the unaligned vector addition/ subtraction, better pipelining in the aligned scalarproduct(), and a new method to calculate the unaligned scalarproduct(). git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18736 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/demac/libdemac/vector_math16_armv6.h | 147 ++++++++++------------- 1 file changed, 66 insertions(+), 81 deletions(-) (limited to 'apps/codecs/demac/libdemac') diff --git a/apps/codecs/demac/libdemac/vector_math16_armv6.h b/apps/codecs/demac/libdemac/vector_math16_armv6.h index bf50d9cabd..e180429193 100644 --- a/apps/codecs/demac/libdemac/vector_math16_armv6.h +++ b/apps/codecs/demac/libdemac/vector_math16_armv6.h @@ -39,36 +39,33 @@ static inline void vector_add(int16_t* v1, int16_t* v2) "10: \n" "ldrh r4, [%[v2]], #2 \n" + "mov r4, r4, lsl #16 \n" "1: \n" "ldmia %[v2]!, {r5-r8} \n" "ldmia %[v1], {r0-r3} \n" "mov r5, r5, ror #16 \n" - "pkhbt r4, r4, r5 \n" + "pkhtb r4, r5, r4, asr #16 \n" "sadd16 r0, r0, r4 \n" - "mov r6, r6, ror #16 \n" - "pkhbt r5, r5, r6 \n" + "pkhbt r5, r5, r6, lsl #16 \n" "sadd16 r1, r1, r5 \n" "mov r7, r7, ror #16 \n" - "pkhbt r6, r6, r7 \n" + "pkhtb r6, r7, r6, asr #16 \n" "sadd16 r2, r2, r6 \n" - "mov r8, r8, ror #16 \n" - "pkhbt r7, r7, r8 \n" + "pkhbt r7, r7, r8, lsl #16 \n" "sadd16 r3, r3, r7 \n" "stmia %[v1]!, {r0-r3} \n" "mov r4, r8 \n" "ldmia %[v2]!, {r5-r8} \n" "ldmia %[v1], {r0-r3} \n" "mov r5, r5, ror #16 \n" - "pkhbt r4, r4, r5 \n" + "pkhtb r4, r5, r4, asr #16 \n" "sadd16 r0, r0, r4 \n" - "mov r6, r6, ror #16 \n" - "pkhbt r5, r5, r6 \n" + "pkhbt r5, r5, r6, lsl #16 \n" "sadd16 r1, r1, r5 \n" "mov r7, r7, ror #16 \n" - "pkhbt r6, r6, r7 \n" + "pkhtb r6, r7, r6, asr #16 \n" "sadd16 r2, r2, r6 \n" - "mov r8, r8, ror #16 \n" - "pkhbt r7, r7, r8 \n" + "pkhbt r7, r7, r8, lsl #16 \n" "sadd16 r3, r3, r7 \n" "stmia %[v1]!, {r0-r3} \n" #if ORDER > 16 @@ -128,36 +125,33 @@ static inline void vector_sub(int16_t* v1, int16_t* v2) "10: \n" "ldrh r4, [%[v2]], #2 \n" + "mov r4, r4, lsl #16 \n" "1: \n" "ldmia %[v2]!, {r5-r8} \n" "ldmia %[v1], {r0-r3} \n" "mov r5, r5, ror #16 \n" - "pkhbt r4, r4, r5 \n" + "pkhtb r4, r5, r4, asr #16 \n" "ssub16 r0, r0, r4 \n" - "mov r6, r6, ror #16 \n" - "pkhbt r5, r5, r6 \n" + "pkhbt r5, r5, r6, lsl #16 \n" "ssub16 r1, r1, r5 \n" "mov r7, r7, ror #16 \n" - "pkhbt r6, r6, r7 \n" + "pkhtb r6, r7, r6, asr #16 \n" "ssub16 r2, r2, r6 \n" - "mov r8, r8, ror #16 \n" - "pkhbt r7, r7, r8 \n" + "pkhbt r7, r7, r8, lsl #16 \n" "ssub16 r3, r3, r7 \n" "stmia %[v1]!, {r0-r3} \n" "mov r4, r8 \n" "ldmia %[v2]!, {r5-r8} \n" "ldmia %[v1], {r0-r3} \n" "mov r5, r5, ror #16 \n" - "pkhbt r4, r4, r5 \n" + "pkhtb r4, r5, r4, asr #16 \n" "ssub16 r0, r0, r4 \n" - "mov r6, r6, ror #16 \n" - "pkhbt r5, r5, r6 \n" + "pkhbt r5, r5, r6, lsl #16 \n" "ssub16 r1, r1, r5 \n" "mov r7, r7, ror #16 \n" - "pkhbt r6, r6, r7 \n" + "pkhtb r6, r7, r6, asr #16 \n" "ssub16 r2, r2, r6 \n" - "mov r8, r8, ror #16 \n" - "pkhbt r7, r7, r8 \n" + "pkhbt r7, r7, r8, lsl #16 \n" "ssub16 r3, r3, r7 \n" "stmia %[v1]!, {r0-r3} \n" #if ORDER > 16 @@ -217,80 +211,71 @@ static inline int32_t scalarproduct(int16_t* v1, int16_t* v2) "beq 20f \n" "10: \n" - "ldrh r2, [%[v2]], #2 \n" - "ldr r0, [%[v1]], #4 \n" - "ldr r3, [%[v2]], #4 \n" - "mov r2, r2, lsl #16 \n" + "ldrh r7, [%[v2]], #2 \n" + "ldmia %[v2]!, {r4-r5} \n" + "ldmia %[v1]!, {r0-r1} \n" + "mov r7, r7, lsl #16 \n" "1: \n" - "ldr r1, [%[v1]], #4 \n" - "smlabt %[res], r0, r2, %[res] \n" - "ldr r4, [%[v2]], #4 \n" - "smlatb %[res], r0, r3, %[res] \n" - "ldr r0, [%[v1]], #4 \n" - "smlabt %[res], r1, r3, %[res] \n" - "ldr r5, [%[v2]], #4 \n" - "smlatb %[res], r1, r4, %[res] \n" - "ldr r1, [%[v1]], #4 \n" - "smlabt %[res], r0, r4, %[res] \n" - "ldr r6, [%[v2]], #4 \n" - "smlatb %[res], r0, r5, %[res] \n" - "ldr r0, [%[v1]], #4 \n" - "smlabt %[res], r1, r5, %[res] \n" - "ldr r3, [%[v2]], #4 \n" - "smlatb %[res], r1, r6, %[res] \n" - "mov r2, r6 \n" - "ldr r1, [%[v1]], #4 \n" - "smlabt %[res], r0, r2, %[res] \n" - "ldr r4, [%[v2]], #4 \n" - "smlatb %[res], r0, r3, %[res] \n" - "ldr r0, [%[v1]], #4 \n" - "smlabt %[res], r1, r3, %[res] \n" - "ldr r5, [%[v2]], #4 \n" - "smlatb %[res], r1, r4, %[res] \n" - "ldr r1, [%[v1]], #4 \n" - "smlabt %[res], r0, r4, %[res] \n" - "ldr r6, [%[v2]], #4 \n" - "smlatb %[res], r0, r5, %[res] \n" + "pkhbt r8, r4, r7 \n" + "ldmia %[v2]!, {r6-r7} \n" + "smladx %[res], r0, r8, %[res] \n" + "pkhbt r8, r5, r4 \n" + "ldmia %[v1]!, {r2-r3} \n" + "smladx %[res], r1, r8, %[res] \n" + "pkhbt r8, r6, r5 \n" + "ldmia %[v2]!, {r4-r5} \n" + "smladx %[res], r2, r8, %[res] \n" + "pkhbt r8, r7, r6 \n" + "ldmia %[v1]!, {r0-r1} \n" + "smladx %[res], r3, r8, %[res] \n" + "pkhbt r8, r4, r7 \n" + "ldmia %[v2]!, {r6-r7} \n" + "smladx %[res], r0, r8, %[res] \n" + "pkhbt r8, r5, r4 \n" + "ldmia %[v1]!, {r2-r3} \n" + "smladx %[res], r1, r8, %[res] \n" + "pkhbt r8, r6, r5 \n" #if ORDER > 16 "subs %[cnt], %[cnt], #1 \n" - "ldrne r0, [%[v1]], #4 \n" - "smlabt %[res], r1, r5, %[res] \n" - "ldrne r3, [%[v2]], #4 \n" - "smlatb %[res], r1, r6, %[res] \n" - "mov r2, r6 \n" + "ldmneia %[v2]!, {r4-r5} \n" + "smladx %[res], r2, r8, %[res] \n" + "pkhbt r8, r7, r6 \n" + "ldmneia %[v1]!, {r0-r1} \n" + "smladx %[res], r3, r8, %[res] \n" "bne 1b \n" #else - "smlabt %[res], r1, r5, %[res] \n" - "smlatb %[res], r1, r6, %[res] \n" + "pkhbt r7, r7, r6 \n" + "smladx %[res], r2, r8, %[res] \n" + "smladx %[res], r3, r7, %[res] \n" #endif "b 99f \n" "20: \n" "ldmia %[v1]!, {r0-r1} \n" - "ldmia %[v2]!, {r4-r5} \n" + "ldmia %[v2]!, {r5-r7} \n" "1: \n" "ldmia %[v1]!, {r2-r3} \n" - "smlad %[res], r0, r4, %[res] \n" - "ldmia %[v2]!, {r6-r7} \n" - "smlad %[res], r1, r5, %[res] \n" - "ldmia %[v1]!, {r0-r1} \n" - "smlad %[res], r2, r6, %[res] \n" + "smlad %[res], r0, r5, %[res] \n" "ldmia %[v2]!, {r4-r5} \n" - "smlad %[res], r3, r7, %[res] \n" - "ldmia %[v1]!, {r2-r3} \n" - "smlad %[res], r0, r4, %[res] \n" + "smlad %[res], r1, r6, %[res] \n" + "ldmia %[v1]!, {r0-r1} \n" + "smlad %[res], r2, r7, %[res] \n" "ldmia %[v2]!, {r6-r7} \n" - "smlad %[res], r1, r5, %[res] \n" + "smlad %[res], r3, r4, %[res] \n" + "ldmia %[v1]!, {r2-r3} \n" + "smlad %[res], r0, r5, %[res] \n" + "ldmia %[v2]!, {r4-r5} \n" + "smlad %[res], r1, r6, %[res] \n" #if ORDER > 16 "subs %[cnt], %[cnt], #1 \n" "ldmneia %[v1]!, {r0-r1} \n" - "smlad %[res], r2, r6, %[res] \n" - "ldmneia %[v2]!, {r4-r5} \n" - "smlad %[res], r3, r7, %[res] \n" + "smlad %[res], r2, r7, %[res] \n" + "ldmneia %[v2]!, {r6-r7} \n" + "smlad %[res], r3, r4, %[res] \n" "bne 1b \n" #else - "smlad %[res], r2, r6, %[res] \n" - "smlad %[res], r3, r7, %[res] \n" + "smlad %[res], r2, r7, %[res] \n" + "smlad %[res], r3, r4, %[res] \n" #endif "99: \n" @@ -303,8 +288,8 @@ static inline int32_t scalarproduct(int16_t* v1, int16_t* v2) [res]"+r"(res) : /* inputs */ : /* clobbers */ - "r0", "r1", "r2", "r3", - "r4", "r5", "r6", "r7" + "r0", "r1", "r2", "r3", "r4", + "r5", "r6", "r7", "r8" ); return res; } -- cgit v1.2.3