X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Farm%2Ffft_neon.S;h=c4d89189ea7906545ea83bd9377b6603a4feee39;hb=78670fbf07bd03479073d4218440de4914304680;hp=6ed5789fb77ba118f5d719dc1fea674f268bf3eb;hpb=648d792042cb6d58d032f3ae2518169d91a87274;p=ffmpeg

diff --git a/libavcodec/arm/fft_neon.S b/libavcodec/arm/fft_neon.S
index 6ed5789fb77..c4d89189ea7 100644
--- a/libavcodec/arm/fft_neon.S
+++ b/libavcodec/arm/fft_neon.S
@@ -4,28 +4,30 @@
  * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
  * Copyright (c) 2009 Naotoshi Nojiri
  *
- * This file is part of FFmpeg.
+ * This algorithm (though not any of the implementation details) is
+ * based on libdjbfft by D. J. Bernstein.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "asm.S"
+#include "libavutil/arm/asm.S"
 
 #define M_SQRT1_2 0.70710678118654752440
 
-        .text
 
 function fft4_neon
         vld1.32         {d0-d3}, [r0,:128]
@@ -43,7 +45,7 @@ function fft4_neon
         vst1.32         {d0-d3}, [r0,:128]
 
         bx              lr
-.endfunc
+endfunc
 
 function fft8_neon
         mov             r1,  r0
@@ -96,7 +98,7 @@ function fft8_neon
         vst1.32         {d0-d3},   [r0,:128]
 
         bx              lr
-.endfunc
+endfunc
 
 function fft16_neon
         movrel          r1, mppm
@@ -141,7 +143,7 @@ function fft16_neon
         vswp            d29, d30                @ q14{r12,i12,i14,r15} q15{r13,i13,i15,r14}
         vadd.f32        q0,  q12, q13           @ {t1,t2,t5,t6}
         vadd.f32        q1,  q14, q15           @ {t1a,t2a,t5a,t6a}
-        movrel          r2,  ff_cos_16
+        movrelx         r2,  X(ff_cos_16)
         vsub.f32        q13, q12, q13           @ {t3,t4,t7,t8}
         vrev64.32       d1,  d1
         vsub.f32        q15, q14, q15           @ {t3a,t4a,t7a,t8a}
@@ -198,7 +200,7 @@ function fft16_neon
         vst2.32         {d26-d27},[r0,:128], r1
         vst2.32         {d30-d31},[r0,:128]
         bx              lr
-.endfunc
+endfunc
 
 function fft_pass_neon
         push            {r4-r6,lr}
@@ -274,7 +276,7 @@ function fft_pass_neon
         bne             1b
 
         pop             {r4-r6,pc}
-.endfunc
+endfunc
 
 .macro  def_fft n, n2, n4
         .align 6
@@ -288,10 +290,10 @@ function fft\n\()_neon
         bl              fft\n4\()_neon
         mov             r0,  r4
         pop             {r4, lr}
-        movrel          r1,  ff_cos_\n
+        movrelx         r1,  X(ff_cos_\n)
         mov             r2,  #\n4/2
         b               fft_pass_neon
-.endfunc
+endfunc
 .endm
 
         def_fft    32,    16,     8
@@ -314,21 +316,23 @@ function ff_fft_calc_neon, export=1
         ldr             r3,  [r3, r2, lsl #2]
         mov             r0,  r1
         bx              r3
-.endfunc
+endfunc
 
 function ff_fft_permute_neon, export=1
         push            {r4,lr}
         mov             r12, #1
         ldr             r2,  [r0]       @ nbits
-        ldr             r3,  [r0, #20]  @ tmp_buf
+        ldr             r3,  [r0, #12]  @ tmp_buf
         ldr             r0,  [r0, #8]   @ revtab
         lsl             r12, r12, r2
         mov             r2,  r12
 1:
         vld1.32         {d0-d1}, [r1,:128]!
         ldr             r4,  [r0], #4
-        uxtah           lr,  r3,  r4
-        uxtah           r4,  r3,  r4,  ror #16
+        uxth            lr,  r4
+        uxth            r4,  r4,  ror #16
+        add             lr,  r3,  lr,  lsl #3
+        add             r4,  r3,  r4,  lsl #3
         vst1.32         {d0}, [lr,:64]
         vst1.32         {d1}, [r4,:64]
         subs            r12, r12, #2
@@ -342,11 +346,9 @@ function ff_fft_permute_neon, export=1
         bgt             1b
 
         pop             {r4,pc}
-.endfunc
+endfunc
 
-        .section .rodata
-        .align 4
-fft_tab_neon:
+const   fft_tab_neon
         .word fft4_neon
         .word fft8_neon
         .word fft16_neon
@@ -362,8 +364,12 @@ fft_tab_neon:
         .word fft16384_neon
         .word fft32768_neon
         .word fft65536_neon
-        .size fft_tab_neon, . - fft_tab_neon
+endconst
+
+const   pmmp, align=4
+        .float          +1.0, -1.0, -1.0, +1.0
+endconst
 
-        .align 4
-pmmp:   .float  +1.0, -1.0, -1.0, +1.0
-mppm:   .float  -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2
+const   mppm, align=4
+        .float          -M_SQRT1_2, M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2
+endconst