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| author | Muhammad Faiz <mfcc64@gmail.com> | 2017-07-07 14:43:39 +0700 |
|---|---|---|
| committer | Muhammad Faiz <mfcc64@gmail.com> | 2017-07-11 13:22:02 +0700 |
| commit | 0780ad9c688cc8272daa7780d3f112a9f55208ca (patch) | |
| tree | 48756b78b84f566a4cecd4322722b8380299f20f /libavcodec/arm | |
| parent | e7d977b446194649aa30f2aacc6c17bce7aeb90b (diff) | |
| download | ffmpeg-0780ad9c688cc8272daa7780d3f112a9f55208ca.tar.gz | |
avcodec/rdft: remove sintable
It is redundant with costable. The first half of sintable is
identical with the second half of costable. The second half
of sintable is negative value of the first half of sintable.
The computation is changed to handle sign of sin values, in
C code and ARM assembly code.
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
Diffstat (limited to 'libavcodec/arm')
| -rw-r--r-- | libavcodec/arm/rdft_neon.S | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/libavcodec/arm/rdft_neon.S b/libavcodec/arm/rdft_neon.S index 781d976354..eabb92b4bd 100644 --- a/libavcodec/arm/rdft_neon.S +++ b/libavcodec/arm/rdft_neon.S @@ -30,18 +30,21 @@ function ff_rdft_calc_neon, export=1 lsls r6, r6, #31 bne 1f - add r0, r4, #20 + add r0, r4, #24 bl X(ff_fft_permute_neon) - add r0, r4, #20 + add r0, r4, #24 mov r1, r5 bl X(ff_fft_calc_neon) 1: ldr r12, [r4, #0] @ nbits mov r2, #1 + ldr r8, [r4, #20] @ negative_sin lsl r12, r2, r12 add r0, r5, #8 + lsl r8, r8, #31 add r1, r5, r12, lsl #2 lsr r12, r12, #2 + vdup.32 d26, r8 ldr r2, [r4, #12] @ tcos sub r12, r12, #2 ldr r3, [r4, #16] @ tsin @@ -55,6 +58,7 @@ function ff_rdft_calc_neon, export=1 vld1.32 {d5}, [r3,:64]! @ tsin[i] vmov.f32 d18, #0.5 @ k1 vdup.32 d19, r6 + veor d5, d26, d5 pld [r0, #32] veor d19, d18, d19 @ k2 vmov.i32 d16, #0 @@ -90,6 +94,7 @@ function ff_rdft_calc_neon, export=1 vld1.32 {d5}, [r3,:64]! @ tsin[i] veor d24, d22, d17 @ ev.re,-ev.im vrev64.32 d3, d23 @ od.re, od.im + veor d5, d26, d5 pld [r2, #32] veor d2, d3, d16 @ -od.re, od.im pld [r3, #32] @@ -140,10 +145,10 @@ function ff_rdft_calc_neon, export=1 vmul.f32 d22, d22, d18 vst1.32 {d22}, [r5,:64] - add r0, r4, #20 + add r0, r4, #24 mov r1, r5 bl X(ff_fft_permute_neon) - add r0, r4, #20 + add r0, r4, #24 mov r1, r5 pop {r4-r8,lr} b X(ff_fft_calc_neon) |