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- /*
- * ARM NEON optimised MDCT
- * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
- *
- * 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.
- *
- * 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
- #include "libavutil/arm/asm.S"
-
- #define ff_fft_calc_neon X(ff_fft_calc_neon)
-
- function ff_imdct_half_neon, export=1
- push {r4-r8,lr}
-
- mov r12, #1
- ldr lr, [r0, #20] @ mdct_bits
- ldr r4, [r0, #24] @ tcos
- ldr r3, [r0, #8] @ revtab
- lsl r12, r12, lr @ n = 1 << nbits
- lsr lr, r12, #2 @ n4 = n >> 2
- add r7, r2, r12, lsl #1
- mov r12, #-16
- sub r7, r7, #16
-
- vld2.32 {d16-d17},[r7,:128],r12 @ d16=x,n1 d17=x,n0
- vld2.32 {d0-d1}, [r2,:128]! @ d0 =m0,x d1 =m1,x
- vrev64.32 d17, d17
- vld2.32 {d2,d3}, [r4,:128]! @ d2=c0,c1 d3=s0,s2
- vmul.f32 d6, d17, d2
- vmul.f32 d7, d0, d2
- 1:
- subs lr, lr, #2
- ldr r6, [r3], #4
- vmul.f32 d4, d0, d3
- vmul.f32 d5, d17, d3
- vsub.f32 d4, d6, d4
- vadd.f32 d5, d5, d7
- uxth r8, r6, ror #16
- uxth r6, r6
- add r8, r1, r8, lsl #3
- add r6, r1, r6, lsl #3
- beq 1f
- vld2.32 {d16-d17},[r7,:128],r12
- vld2.32 {d0-d1}, [r2,:128]!
- vrev64.32 d17, d17
- vld2.32 {d2,d3}, [r4,:128]! @ d2=c0,c1 d3=s0,s2
- vmul.f32 d6, d17, d2
- vmul.f32 d7, d0, d2
- vst2.32 {d4[0],d5[0]}, [r6,:64]
- vst2.32 {d4[1],d5[1]}, [r8,:64]
- b 1b
- 1:
- vst2.32 {d4[0],d5[0]}, [r6,:64]
- vst2.32 {d4[1],d5[1]}, [r8,:64]
-
- mov r4, r0
- mov r6, r1
- bl ff_fft_calc_neon
-
- mov r12, #1
- ldr lr, [r4, #20] @ mdct_bits
- ldr r4, [r4, #24] @ tcos
- lsl r12, r12, lr @ n = 1 << nbits
- lsr lr, r12, #3 @ n8 = n >> 3
-
- add r4, r4, lr, lsl #3
- add r6, r6, lr, lsl #3
- sub r1, r4, #16
- sub r3, r6, #16
-
- mov r7, #-16
- mov r8, r6
- mov r0, r3
-
- vld2.32 {d0-d1}, [r3,:128], r7 @ d0 =i1,r1 d1 =i0,r0
- vld2.32 {d20-d21},[r6,:128]! @ d20=i2,r2 d21=i3,r3
- vld2.32 {d16,d18},[r1,:128], r7 @ d16=c1,c0 d18=s1,s0
- 1:
- subs lr, lr, #2
- vmul.f32 d7, d0, d18
- vld2.32 {d17,d19},[r4,:128]! @ d17=c2,c3 d19=s2,s3
- vmul.f32 d4, d1, d18
- vmul.f32 d5, d21, d19
- vmul.f32 d6, d20, d19
- vmul.f32 d22, d1, d16
- vmul.f32 d23, d21, d17
- vmul.f32 d24, d0, d16
- vmul.f32 d25, d20, d17
- vadd.f32 d7, d7, d22
- vadd.f32 d6, d6, d23
- vsub.f32 d4, d4, d24
- vsub.f32 d5, d5, d25
- beq 1f
- vld2.32 {d0-d1}, [r3,:128], r7
- vld2.32 {d20-d21},[r6,:128]!
- vld2.32 {d16,d18},[r1,:128], r7 @ d16=c1,c0 d18=s1,s0
- vrev64.32 q3, q3
- vst2.32 {d4,d6}, [r0,:128], r7
- vst2.32 {d5,d7}, [r8,:128]!
- b 1b
- 1:
- vrev64.32 q3, q3
- vst2.32 {d4,d6}, [r0,:128]
- vst2.32 {d5,d7}, [r8,:128]
-
- pop {r4-r8,pc}
- endfunc
-
- function ff_imdct_calc_neon, export=1
- push {r4-r6,lr}
-
- ldr r3, [r0, #20]
- mov r4, #1
- mov r5, r1
- lsl r4, r4, r3
- add r1, r1, r4
-
- bl X(ff_imdct_half_neon)
-
- add r0, r5, r4, lsl #2
- add r1, r5, r4, lsl #1
- sub r0, r0, #8
- sub r2, r1, #16
- mov r3, #-16
- mov r6, #-8
- vmov.i32 d30, #1<<31
- 1:
- vld1.32 {d0-d1}, [r2,:128], r3
- pld [r0, #-16]
- vrev64.32 q0, q0
- vld1.32 {d2-d3}, [r1,:128]!
- veor d4, d1, d30
- pld [r2, #-16]
- vrev64.32 q1, q1
- veor d5, d0, d30
- vst1.32 {d2}, [r0,:64], r6
- vst1.32 {d3}, [r0,:64], r6
- vst1.32 {d4-d5}, [r5,:128]!
- subs r4, r4, #16
- bgt 1b
-
- pop {r4-r6,pc}
- endfunc
-
- function ff_mdct_calc_neon, export=1
- push {r4-r10,lr}
-
- mov r12, #1
- ldr lr, [r0, #20] @ mdct_bits
- ldr r4, [r0, #24] @ tcos
- ldr r3, [r0, #8] @ revtab
- lsl lr, r12, lr @ n = 1 << nbits
- add r7, r2, lr @ in4u
- sub r9, r7, #16 @ in4d
- add r2, r7, lr, lsl #1 @ in3u
- add r8, r9, lr, lsl #1 @ in3d
- add r5, r4, lr, lsl #1
- sub r5, r5, #16
- sub r3, r3, #4
- mov r12, #-16
-
- vld2.32 {d16,d18},[r9,:128],r12 @ in0u0,in0u1 in4d1,in4d0
- vld2.32 {d17,d19},[r8,:128],r12 @ in2u0,in2u1 in3d1,in3d0
- vld2.32 {d0, d2}, [r7,:128]! @ in4u0,in4u1 in2d1,in2d0
- vrev64.32 q9, q9 @ in4d0,in4d1 in3d0,in3d1
- vld2.32 {d1, d3}, [r2,:128]! @ in3u0,in3u1 in1d1,in1d0
- vsub.f32 d0, d18, d0 @ in4d-in4u I
- vld2.32 {d20,d21},[r4,:128]! @ c0,c1 s0,s1
- vrev64.32 q1, q1 @ in2d0,in2d1 in1d0,in1d1
- vld2.32 {d30,d31},[r5,:128],r12 @ c2,c3 s2,s3
- vadd.f32 d1, d1, d19 @ in3u+in3d -R
- vsub.f32 d16, d16, d2 @ in0u-in2d R
- vadd.f32 d17, d17, d3 @ in2u+in1d -I
- 1:
- vmul.f32 d7, d0, d21 @ I*s
- A ldr r10, [r3, lr, lsr #1]
- T lsr r10, lr, #1
- T ldr r10, [r3, r10]
- vmul.f32 d6, d1, d20 @ -R*c
- ldr r6, [r3, #4]!
- vmul.f32 d4, d1, d21 @ -R*s
- vmul.f32 d5, d0, d20 @ I*c
- vmul.f32 d24, d16, d30 @ R*c
- vmul.f32 d25, d17, d31 @ -I*s
- vmul.f32 d22, d16, d31 @ R*s
- vmul.f32 d23, d17, d30 @ I*c
- subs lr, lr, #16
- vsub.f32 d6, d6, d7 @ -R*c-I*s
- vadd.f32 d7, d4, d5 @ -R*s+I*c
- vsub.f32 d24, d25, d24 @ I*s-R*c
- vadd.f32 d25, d22, d23 @ R*s-I*c
- beq 1f
- mov r12, #-16
- vld2.32 {d16,d18},[r9,:128],r12 @ in0u0,in0u1 in4d1,in4d0
- vld2.32 {d17,d19},[r8,:128],r12 @ in2u0,in2u1 in3d1,in3d0
- vneg.f32 d7, d7 @ R*s-I*c
- vld2.32 {d0, d2}, [r7,:128]! @ in4u0,in4u1 in2d1,in2d0
- vrev64.32 q9, q9 @ in4d0,in4d1 in3d0,in3d1
- vld2.32 {d1, d3}, [r2,:128]! @ in3u0,in3u1 in1d1,in1d0
- vsub.f32 d0, d18, d0 @ in4d-in4u I
- vld2.32 {d20,d21},[r4,:128]! @ c0,c1 s0,s1
- vrev64.32 q1, q1 @ in2d0,in2d1 in1d0,in1d1
- vld2.32 {d30,d31},[r5,:128],r12 @ c2,c3 s2,s3
- vadd.f32 d1, d1, d19 @ in3u+in3d -R
- vsub.f32 d16, d16, d2 @ in0u-in2d R
- vadd.f32 d17, d17, d3 @ in2u+in1d -I
- uxth r12, r6, ror #16
- uxth r6, r6
- add r12, r1, r12, lsl #3
- add r6, r1, r6, lsl #3
- vst2.32 {d6[0],d7[0]}, [r6,:64]
- vst2.32 {d6[1],d7[1]}, [r12,:64]
- uxth r6, r10, ror #16
- uxth r10, r10
- add r6 , r1, r6, lsl #3
- add r10, r1, r10, lsl #3
- vst2.32 {d24[0],d25[0]},[r10,:64]
- vst2.32 {d24[1],d25[1]},[r6,:64]
- b 1b
- 1:
- vneg.f32 d7, d7 @ R*s-I*c
- uxth r12, r6, ror #16
- uxth r6, r6
- add r12, r1, r12, lsl #3
- add r6, r1, r6, lsl #3
- vst2.32 {d6[0],d7[0]}, [r6,:64]
- vst2.32 {d6[1],d7[1]}, [r12,:64]
- uxth r6, r10, ror #16
- uxth r10, r10
- add r6 , r1, r6, lsl #3
- add r10, r1, r10, lsl #3
- vst2.32 {d24[0],d25[0]},[r10,:64]
- vst2.32 {d24[1],d25[1]},[r6,:64]
-
- mov r4, r0
- mov r6, r1
- bl ff_fft_calc_neon
-
- mov r12, #1
- ldr lr, [r4, #20] @ mdct_bits
- ldr r4, [r4, #24] @ tcos
- lsl r12, r12, lr @ n = 1 << nbits
- lsr lr, r12, #3 @ n8 = n >> 3
-
- add r4, r4, lr, lsl #3
- add r6, r6, lr, lsl #3
- sub r1, r4, #16
- sub r3, r6, #16
-
- mov r7, #-16
- mov r8, r6
- mov r0, r3
-
- vld2.32 {d0-d1}, [r3,:128], r7 @ d0 =r1,i1 d1 =r0,i0
- vld2.32 {d20-d21},[r6,:128]! @ d20=r2,i2 d21=r3,i3
- vld2.32 {d16,d18},[r1,:128], r7 @ c1,c0 s1,s0
- 1:
- subs lr, lr, #2
- vmul.f32 d7, d0, d18 @ r1*s1,r0*s0
- vld2.32 {d17,d19},[r4,:128]! @ c2,c3 s2,s3
- vmul.f32 d4, d1, d18 @ i1*s1,i0*s0
- vmul.f32 d5, d21, d19 @ i2*s2,i3*s3
- vmul.f32 d6, d20, d19 @ r2*s2,r3*s3
- vmul.f32 d24, d0, d16 @ r1*c1,r0*c0
- vmul.f32 d25, d20, d17 @ r2*c2,r3*c3
- vmul.f32 d22, d21, d17 @ i2*c2,i3*c3
- vmul.f32 d23, d1, d16 @ i1*c1,i0*c0
- vadd.f32 d4, d4, d24 @ i1*s1+r1*c1,i0*s0+r0*c0
- vadd.f32 d5, d5, d25 @ i2*s2+r2*c2,i3*s3+r3*c3
- vsub.f32 d6, d22, d6 @ i2*c2-r2*s2,i3*c3-r3*s3
- vsub.f32 d7, d23, d7 @ i1*c1-r1*s1,i0*c0-r0*s0
- vneg.f32 q2, q2
- beq 1f
- vld2.32 {d0-d1}, [r3,:128], r7
- vld2.32 {d20-d21},[r6,:128]!
- vld2.32 {d16,d18},[r1,:128], r7 @ c1,c0 s1,s0
- vrev64.32 q3, q3
- vst2.32 {d4,d6}, [r0,:128], r7
- vst2.32 {d5,d7}, [r8,:128]!
- b 1b
- 1:
- vrev64.32 q3, q3
- vst2.32 {d4,d6}, [r0,:128]
- vst2.32 {d5,d7}, [r8,:128]
-
- pop {r4-r10,pc}
- endfunc
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