/* * ARM NEON optimised MDCT * Copyright (c) 2009 Mans Rullgard * * 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