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| author | Nils Wallménius <nils@rockbox.org> | 2010-11-05 16:21:25 +0000 |
|---|---|---|
| committer | Nils Wallménius <nils@rockbox.org> | 2010-11-05 16:21:25 +0000 |
| commit | f174c3513b4b2a4a0583a2b72ee442bbb211d442 (patch) | |
| tree | 420a9e8561ef5987f4c3ca3391a6fe5677521727 /apps/codecs | |
| parent | 34fb311638426f850e8d620cadbaba3857ae9aef (diff) | |
| download | rockbox-f174c3513b4b2a4a0583a2b72ee442bbb211d442.zip rockbox-f174c3513b4b2a4a0583a2b72ee442bbb211d442.tar.gz rockbox-f174c3513b4b2a4a0583a2b72ee442bbb211d442.tar.bz2 rockbox-f174c3513b4b2a4a0583a2b72ee442bbb211d442.tar.xz | |
libmusepack: use postindexing on the pointer when storing to increment it for free, saves another instruction in the loop in mpc_decoder_windowing_D speed difference is in the noise though.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28492 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs')
| -rw-r--r-- | apps/codecs/libmusepack/synth_filter_arm.S | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/apps/codecs/libmusepack/synth_filter_arm.S b/apps/codecs/libmusepack/synth_filter_arm.S index 521d690..9bd4e04 100644 --- a/apps/codecs/libmusepack/synth_filter_arm.S +++ b/apps/codecs/libmusepack/synth_filter_arm.S @@ -238,13 +238,12 @@ mpc_decoder_windowing_D: /* store Data[01..15] */ mov r8, r8, lsr #16 orr r8, r8, r9, lsl #16 /* (lo>>16) || (hi<<16) */ - str r8, [r0] /* store Data */ /* store Data[31..17] */ mov r10, r10, lsr #16 orr r10, r10, r11, lsl #16 /* (lo>>16) || (hi<<16) */ rsb r10, r10, #0 /* r10 = -r10 */ str r10, [r0, lr] /* store Data */ - add r0, r0, #4 /* r0++ */ + str r8, [r0], #4 /* store Data */ /* correct adresses for next loop */ sub r12, r12, #4 /* r12 = V-- */ add r1, r1, #4 /* r1 = V++ */ @@ -441,13 +440,12 @@ mpc_decoder_windowing_D: /* store Data[01..15] */ mov r8, r8, lsr #16 orr r8, r8, r9, lsl #16 /* (lo>>16) || (hi<<16) */ - str r8, [r0] /* store Data */ /* store Data[31..17] */ mov r10, r10, lsr #16 orr r10, r10, r11, lsl #16 /* (lo>>16) || (hi<<16) */ rsb r10, r10, #0 /* r10 = -r10 */ str r10, [r0, lr] /* store Data */ - add r0, r0, #4 /* r0++ */ + str r8, [r0], #4 /* store Data */ /* correct adresses for next loop */ sub r12, r12, #4 /* r12 = V-- */ add r1, r1, #4 /* r1 = V++ */ @@ -641,11 +639,10 @@ mpc_decoder_windowing_D: rsb r11, r11, #0 /* r11 = -r11 */ /* store Data[01..15] */ mov r9, r9, lsl #2 - str r9, [r0] /* store Data */ /* store Data[31..17] */ mov r11, r11, lsl #2 str r11, [r0, lr] /* store Data */ - add r0, r0, #4 /* r0++ */ + str r9, [r0], #4 /* store Data */ /* next loop */ subs lr, lr, #8 bgt .loop15 |