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| author | Janne Grunau <janne-libav@jannau.net> | 2017-01-10 00:15:09 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-01-14 21:13:12 +0100 |
| commit | a71cd8439fd32fd83b7a9b9ac8d6f861846770c7 (patch) | |
| tree | dca1d9c0ae8be675e348618bda9f5ebd191b9f41 /libavcodec/arm/vp9itxfm_neon.S | |
| parent | cb220eeef9bfe889769dc4e08248b0a59d24e2a9 (diff) | |
| download | ffmpeg-a71cd8439fd32fd83b7a9b9ac8d6f861846770c7.tar.gz | |
arm: vp9itxfm: Simplify the stack alignment code
This is one instruction less for thumb, and only have got
1/2 arm/thumb specific instructions.
This is cherrypicked from libav commit
e5b0fc170f85b00f7dd0ac514918fb5c95253d39.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/arm/vp9itxfm_neon.S')
| -rw-r--r-- | libavcodec/arm/vp9itxfm_neon.S | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/libavcodec/arm/vp9itxfm_neon.S b/libavcodec/arm/vp9itxfm_neon.S index 06470a3997..d7a2654dbe 100644 --- a/libavcodec/arm/vp9itxfm_neon.S +++ b/libavcodec/arm/vp9itxfm_neon.S @@ -791,15 +791,13 @@ function ff_vp9_\txfm1\()_\txfm2\()_16x16_add_neon, export=1 .ifnc \txfm1\()_\txfm2,idct_idct vpush {q4-q7} .endif - mov r7, sp @ Align the stack, allocate a temp buffer -T mov r12, sp -T bic r12, r12, #15 -T sub r12, r12, #512 -T mov sp, r12 -A bic sp, sp, #15 -A sub sp, sp, #512 +T mov r7, sp +T and r7, r7, #15 +A and r7, sp, #15 + add r7, r7, #512 + sub sp, sp, r7 mov r4, r0 mov r5, r1 @@ -828,7 +826,7 @@ A sub sp, sp, #512 bl \txfm2\()16_1d_4x16_pass2_neon .endr - mov sp, r7 + add sp, sp, r7 .ifnc \txfm1\()_\txfm2,idct_idct vpop {q4-q7} .endif @@ -1117,15 +1115,13 @@ function ff_vp9_idct_idct_32x32_add_neon, export=1 beq idct32x32_dc_add_neon push {r4-r7,lr} vpush {q4-q7} - mov r7, sp @ Align the stack, allocate a temp buffer -T mov r12, sp -T bic r12, r12, #15 -T sub r12, r12, #2048 -T mov sp, r12 -A bic sp, sp, #15 -A sub sp, sp, #2048 +T mov r7, sp +T and r7, r7, #15 +A and r7, sp, #15 + add r7, r7, #2048 + sub sp, sp, r7 mov r4, r0 mov r5, r1 @@ -1143,7 +1139,7 @@ A sub sp, sp, #2048 bl idct32_1d_4x32_pass2_neon .endr - mov sp, r7 + add sp, sp, r7 vpop {q4-q7} pop {r4-r7,pc} endfunc |