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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /media/ffvpx/libavcodec/arm/fft_vfp.S | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | media/ffvpx/libavcodec/arm/fft_vfp.S | 530 |
1 files changed, 530 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/arm/fft_vfp.S b/media/ffvpx/libavcodec/arm/fft_vfp.S new file mode 100644 index 0000000000..ac601325f2 --- /dev/null +++ b/media/ffvpx/libavcodec/arm/fft_vfp.S @@ -0,0 +1,530 @@ +/* + * Copyright (c) 2013 RISC OS Open Ltd + * Author: Ben Avison <bavison@riscosopen.org> + * + * This file is part of FFmpeg. + * + * FFmpeg 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, + * 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 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/arm/asm.S" + +@ The fftx_internal_vfp versions of the functions obey a modified AAPCS: +@ VFP is in RunFast mode, vector length 4, stride 1 thoroughout, and +@ all single-precision VFP registers may be corrupted on exit. The a2 +@ register may not be clobbered in these functions, as it holds the +@ stored original FPSCR. + +function ff_fft_calc_vfp, export=1 + ldr ip, [a1, #0] @ nbits + mov a1, a2 + movrel a2, (fft_tab_vfp - 8) + ldr pc, [a2, ip, lsl #2] +endfunc +const fft_tab_vfp, relocate=1 + .word fft4_vfp + .word fft8_vfp + .word X(ff_fft16_vfp) @ this one alone is exported + .word fft32_vfp + .word fft64_vfp + .word fft128_vfp + .word fft256_vfp + .word fft512_vfp + .word fft1024_vfp + .word fft2048_vfp + .word fft4096_vfp + .word fft8192_vfp + .word fft16384_vfp + .word fft32768_vfp + .word fft65536_vfp +endconst + +function fft4_vfp + vldr d0, [a1, #0*2*4] @ s0,s1 = z[0] + vldr d4, [a1, #1*2*4] @ s8,s9 = z[1] + vldr d1, [a1, #2*2*4] @ s2,s3 = z[2] + vldr d5, [a1, #3*2*4] @ s10,s11 = z[3] + @ stall + vadd.f s12, s0, s8 @ i0 + vadd.f s13, s1, s9 @ i1 + vadd.f s14, s2, s10 @ i2 + vadd.f s15, s3, s11 @ i3 + vsub.f s8, s0, s8 @ i4 + vsub.f s9, s1, s9 @ i5 + vsub.f s10, s2, s10 @ i6 + vsub.f s11, s3, s11 @ i7 + @ stall + @ stall + vadd.f s0, s12, s14 @ z[0].re + vsub.f s4, s12, s14 @ z[2].re + vadd.f s1, s13, s15 @ z[0].im + vsub.f s5, s13, s15 @ z[2].im + vadd.f s7, s9, s10 @ z[3].im + vsub.f s3, s9, s10 @ z[1].im + vadd.f s2, s8, s11 @ z[1].re + vsub.f s6, s8, s11 @ z[3].re + @ stall + @ stall + vstr d0, [a1, #0*2*4] + vstr d2, [a1, #2*2*4] + @ stall + @ stall + vstr d1, [a1, #1*2*4] + vstr d3, [a1, #3*2*4] + + bx lr +endfunc + +.macro macro_fft8_head + @ FFT4 + vldr d4, [a1, #0 * 2*4] + vldr d6, [a1, #1 * 2*4] + vldr d5, [a1, #2 * 2*4] + vldr d7, [a1, #3 * 2*4] + @ BF + vldr d12, [a1, #4 * 2*4] + vadd.f s16, s8, s12 @ vector op + vldr d14, [a1, #5 * 2*4] + vldr d13, [a1, #6 * 2*4] + vldr d15, [a1, #7 * 2*4] + vsub.f s20, s8, s12 @ vector op + vadd.f s0, s16, s18 + vsub.f s2, s16, s18 + vadd.f s1, s17, s19 + vsub.f s3, s17, s19 + vadd.f s7, s21, s22 + vsub.f s5, s21, s22 + vadd.f s4, s20, s23 + vsub.f s6, s20, s23 + vsub.f s20, s24, s28 @ vector op + vstr d0, [a1, #0 * 2*4] @ transfer s0-s7 to s24-s31 via memory + vstr d1, [a1, #1 * 2*4] + vldr s0, cos1pi4 + vadd.f s16, s24, s28 @ vector op + vstr d2, [a1, #2 * 2*4] + vstr d3, [a1, #3 * 2*4] + vldr d12, [a1, #0 * 2*4] + @ TRANSFORM + vmul.f s20, s20, s0 @ vector x scalar op + vldr d13, [a1, #1 * 2*4] + vldr d14, [a1, #2 * 2*4] + vldr d15, [a1, #3 * 2*4] + @ BUTTERFLIES + vadd.f s0, s18, s16 + vadd.f s1, s17, s19 + vsub.f s2, s17, s19 + vsub.f s3, s18, s16 + vadd.f s4, s21, s20 + vsub.f s5, s21, s20 + vadd.f s6, s22, s23 + vsub.f s7, s22, s23 + vadd.f s8, s0, s24 @ vector op + vstr d0, [a1, #0 * 2*4] @ transfer s0-s3 to s12-s15 via memory + vstr d1, [a1, #1 * 2*4] + vldr d6, [a1, #0 * 2*4] + vldr d7, [a1, #1 * 2*4] + vadd.f s1, s5, s6 + vadd.f s0, s7, s4 + vsub.f s2, s5, s6 + vsub.f s3, s7, s4 + vsub.f s12, s24, s12 @ vector op + vsub.f s5, s29, s1 + vsub.f s4, s28, s0 + vsub.f s6, s30, s2 + vsub.f s7, s31, s3 + vadd.f s16, s0, s28 @ vector op + vstr d6, [a1, #4 * 2*4] + vstr d7, [a1, #6 * 2*4] + vstr d4, [a1, #0 * 2*4] + vstr d5, [a1, #2 * 2*4] + vstr d2, [a1, #5 * 2*4] + vstr d3, [a1, #7 * 2*4] +.endm + +.macro macro_fft8_tail + vstr d8, [a1, #1 * 2*4] + vstr d9, [a1, #3 * 2*4] +.endm + +function .Lfft8_internal_vfp + macro_fft8_head + macro_fft8_tail + bx lr +endfunc + +function fft8_vfp + ldr a3, =0x03030000 @ RunFast mode, vector length 4, stride 1 + fmrx a2, FPSCR + fmxr FPSCR, a3 + vpush {s16-s31} + mov ip, lr + bl .Lfft8_internal_vfp + vpop {s16-s31} + fmxr FPSCR, a2 + bx ip +endfunc + +.align 3 +cos1pi4: @ cos(1*pi/4) = sqrt(2) + .float 0.707106769084930419921875 +cos1pi8: @ cos(1*pi/8) = sqrt(2+sqrt(2))/2 + .float 0.92387950420379638671875 +cos3pi8: @ cos(2*pi/8) = sqrt(2-sqrt(2))/2 + .float 0.3826834261417388916015625 + +function .Lfft16_internal_vfp + macro_fft8_head + @ FFT4(z+8) + vldr d10, [a1, #8 * 2*4] + vldr d12, [a1, #9 * 2*4] + vldr d11, [a1, #10 * 2*4] + vldr d13, [a1, #11 * 2*4] + macro_fft8_tail + vadd.f s16, s20, s24 @ vector op + @ FFT4(z+12) + vldr d4, [a1, #12 * 2*4] + vldr d6, [a1, #13 * 2*4] + vldr d5, [a1, #14 * 2*4] + vsub.f s20, s20, s24 @ vector op + vldr d7, [a1, #15 * 2*4] + vadd.f s0, s16, s18 + vsub.f s4, s16, s18 + vadd.f s1, s17, s19 + vsub.f s5, s17, s19 + vadd.f s7, s21, s22 + vsub.f s3, s21, s22 + vadd.f s2, s20, s23 + vsub.f s6, s20, s23 + vadd.f s16, s8, s12 @ vector op + vstr d0, [a1, #8 * 2*4] + vstr d2, [a1, #10 * 2*4] + vstr d1, [a1, #9 * 2*4] + vsub.f s20, s8, s12 + vstr d3, [a1, #11 * 2*4] + @ TRANSFORM(z[2],z[6],z[10],z[14],cos1pi4,cos1pi4) + vldr d12, [a1, #10 * 2*4] + vadd.f s0, s16, s18 + vadd.f s1, s17, s19 + vsub.f s6, s16, s18 + vsub.f s7, s17, s19 + vsub.f s3, s21, s22 + vadd.f s2, s20, s23 + vadd.f s5, s21, s22 + vsub.f s4, s20, s23 + vstr d0, [a1, #12 * 2*4] + vmov s0, s6 + @ TRANSFORM(z[1],z[5],z[9],z[13],cos1pi8,cos3pi8) + vldr d6, [a1, #9 * 2*4] + vstr d1, [a1, #13 * 2*4] + vldr d1, cos1pi4 @ s2 = cos1pi4, s3 = cos1pi8 + vstr d2, [a1, #15 * 2*4] + vldr d7, [a1, #13 * 2*4] + vadd.f s4, s25, s24 + vsub.f s5, s25, s24 + vsub.f s6, s0, s7 + vadd.f s7, s0, s7 + vmul.f s20, s12, s3 @ vector op + @ TRANSFORM(z[3],z[7],z[11],z[15],cos3pi8,cos1pi8) + vldr d4, [a1, #11 * 2*4] + vldr d5, [a1, #15 * 2*4] + vldr s1, cos3pi8 + vmul.f s24, s4, s2 @ vector * scalar op + vmul.f s28, s12, s1 @ vector * scalar op + vmul.f s12, s8, s1 @ vector * scalar op + vadd.f s4, s20, s29 + vsub.f s5, s21, s28 + vsub.f s6, s22, s31 + vadd.f s7, s23, s30 + vmul.f s8, s8, s3 @ vector * scalar op + vldr d8, [a1, #1 * 2*4] + vldr d9, [a1, #5 * 2*4] + vldr d10, [a1, #3 * 2*4] + vldr d11, [a1, #7 * 2*4] + vldr d14, [a1, #2 * 2*4] + vadd.f s0, s6, s4 + vadd.f s1, s5, s7 + vsub.f s2, s5, s7 + vsub.f s3, s6, s4 + vadd.f s4, s12, s9 + vsub.f s5, s13, s8 + vsub.f s6, s14, s11 + vadd.f s7, s15, s10 + vadd.f s12, s0, s16 @ vector op + vstr d0, [a1, #1 * 2*4] + vstr d1, [a1, #5 * 2*4] + vldr d4, [a1, #1 * 2*4] + vldr d5, [a1, #5 * 2*4] + vadd.f s0, s6, s4 + vadd.f s1, s5, s7 + vsub.f s2, s5, s7 + vsub.f s3, s6, s4 + vsub.f s8, s16, s8 @ vector op + vstr d6, [a1, #1 * 2*4] + vstr d7, [a1, #5 * 2*4] + vldr d15, [a1, #6 * 2*4] + vsub.f s4, s20, s0 + vsub.f s5, s21, s1 + vsub.f s6, s22, s2 + vsub.f s7, s23, s3 + vadd.f s20, s0, s20 @ vector op + vstr d4, [a1, #9 * 2*4] + @ TRANSFORM_ZERO(z[0],z[4],z[8],z[12]) + vldr d6, [a1, #8 * 2*4] + vstr d5, [a1, #13 * 2*4] + vldr d7, [a1, #12 * 2*4] + vstr d2, [a1, #11 * 2*4] + vldr d8, [a1, #0 * 2*4] + vstr d3, [a1, #15 * 2*4] + vldr d9, [a1, #4 * 2*4] + vadd.f s0, s26, s24 + vadd.f s1, s25, s27 + vsub.f s2, s25, s27 + vsub.f s3, s26, s24 + vadd.f s4, s14, s12 + vadd.f s5, s13, s15 + vsub.f s6, s13, s15 + vsub.f s7, s14, s12 + vadd.f s8, s0, s28 @ vector op + vstr d0, [a1, #3 * 2*4] + vstr d1, [a1, #7 * 2*4] + vldr d6, [a1, #3 * 2*4] + vldr d7, [a1, #7 * 2*4] + vsub.f s0, s16, s4 + vsub.f s1, s17, s5 + vsub.f s2, s18, s6 + vsub.f s3, s19, s7 + vsub.f s12, s28, s12 @ vector op + vadd.f s16, s4, s16 @ vector op + vstr d10, [a1, #3 * 2*4] + vstr d11, [a1, #7 * 2*4] + vstr d4, [a1, #2 * 2*4] + vstr d5, [a1, #6 * 2*4] + vstr d0, [a1, #8 * 2*4] + vstr d1, [a1, #12 * 2*4] + vstr d6, [a1, #10 * 2*4] + vstr d7, [a1, #14 * 2*4] + vstr d8, [a1, #0 * 2*4] + vstr d9, [a1, #4 * 2*4] + + bx lr +endfunc + +function ff_fft16_vfp, export=1 + ldr a3, =0x03030000 @ RunFast mode, vector length 4, stride 1 + fmrx a2, FPSCR + fmxr FPSCR, a3 + vpush {s16-s31} + mov ip, lr + bl .Lfft16_internal_vfp + vpop {s16-s31} + fmxr FPSCR, a2 + bx ip +endfunc + +.macro pass n, z0, z1, z2, z3 + add v6, v5, #4*2*\n + @ TRANSFORM_ZERO(z[0],z[o1],z[o2],z[o3]) + @ TRANSFORM(z[1],z[o1+1],z[o2+1],z[o3+1],wre[1],wim[-1]) + @ TRANSFORM(z[0],z[o1],z[o2],z[o3],wre[0],wim[0]) + @ TRANSFORM(z[1],z[o1+1],z[o2+1],z[o3+1],wre[1],wim[-1]) + vldr d8, [\z2, #8*(o2+1)] @ s16,s17 + vldmdb v6!, {s2} + vldr d9, [\z3, #8*(o3+1)] @ s18,s19 + vldmia v5!, {s0,s1} @ s0 is unused + vldr s7, [\z2, #8*o2] @ t1 + vmul.f s20, s16, s2 @ vector * scalar + vldr s0, [\z3, #8*o3] @ t5 + vldr s6, [\z2, #8*o2+4] @ t2 + vldr s3, [\z3, #8*o3+4] @ t6 + vmul.f s16, s16, s1 @ vector * scalar + ldr a4, =\n-1 +1: add \z0, \z0, #8*2 + .if \n*4*2 >= 512 + add \z1, \z1, #8*2 + .endif + .if \n*4*2 >= 256 + add \z2, \z2, #8*2 + .endif + .if \n*4*2 >= 512 + add \z3, \z3, #8*2 + .endif + @ up to 2 stalls (VFP vector issuing / waiting for s0) + @ depending upon whether this is the first iteration and + @ how many add instructions are inserted above + vadd.f s4, s0, s7 @ t5 + vadd.f s5, s6, s3 @ t6 + vsub.f s6, s6, s3 @ t4 + vsub.f s7, s0, s7 @ t3 + vldr d6, [\z0, #8*0-8*2] @ s12,s13 + vadd.f s0, s16, s21 @ t1 + vldr d7, [\z1, #8*o1-8*2] @ s14,s15 + vsub.f s1, s18, s23 @ t5 + vadd.f s8, s4, s12 @ vector + vector + @ stall (VFP vector issuing) + @ stall (VFP vector issuing) + @ stall (VFP vector issuing) + vsub.f s4, s12, s4 + vsub.f s5, s13, s5 + vsub.f s6, s14, s6 + vsub.f s7, s15, s7 + vsub.f s2, s17, s20 @ t2 + vadd.f s3, s19, s22 @ t6 + vstr d4, [\z0, #8*0-8*2] @ s8,s9 + vstr d5, [\z1, #8*o1-8*2] @ s10,s11 + @ stall (waiting for s5) + vstr d2, [\z2, #8*o2-8*2] @ s4,s5 + vadd.f s4, s1, s0 @ t5 + vstr d3, [\z3, #8*o3-8*2] @ s6,s7 + vsub.f s7, s1, s0 @ t3 + vadd.f s5, s2, s3 @ t6 + vsub.f s6, s2, s3 @ t4 + vldr d6, [\z0, #8*1-8*2] @ s12,s13 + vldr d7, [\z1, #8*(o1+1)-8*2] @ s14,s15 + vldr d4, [\z2, #8*o2] @ s8,s9 + vldmdb v6!, {s2,s3} + vldr d5, [\z3, #8*o3] @ s10,s11 + vadd.f s20, s4, s12 @ vector + vector + vldmia v5!, {s0,s1} + vldr d8, [\z2, #8*(o2+1)] @ s16,s17 + @ stall (VFP vector issuing) + vsub.f s4, s12, s4 + vsub.f s5, s13, s5 + vsub.f s6, s14, s6 + vsub.f s7, s15, s7 + vmul.f s12, s8, s3 @ vector * scalar + vstr d10, [\z0, #8*1-8*2] @ s20,s21 + vldr d9, [\z3, #8*(o3+1)] @ s18,s19 + vstr d11, [\z1, #8*(o1+1)-8*2] @ s22,s23 + vmul.f s8, s8, s0 @ vector * scalar + vstr d2, [\z2, #8*(o2+1)-8*2] @ s4,s5 + @ stall (waiting for s7) + vstr d3, [\z3, #8*(o3+1)-8*2] @ s6,s7 + vmul.f s20, s16, s2 @ vector * scalar + @ stall (VFP vector issuing) + @ stall (VFP vector issuing) + @ stall (VFP vector issuing) + vadd.f s7, s8, s13 @ t1 + vsub.f s6, s9, s12 @ t2 + vsub.f s0, s10, s15 @ t5 + vadd.f s3, s11, s14 @ t6 + vmul.f s16, s16, s1 @ vector * scalar + subs a4, a4, #1 + bne 1b + @ What remains is identical to the first two indentations of + @ the above, but without the increment of z + vadd.f s4, s0, s7 @ t5 + vadd.f s5, s6, s3 @ t6 + vsub.f s6, s6, s3 @ t4 + vsub.f s7, s0, s7 @ t3 + vldr d6, [\z0, #8*0] @ s12,s13 + vadd.f s0, s16, s21 @ t1 + vldr d7, [\z1, #8*o1] @ s14,s15 + vsub.f s1, s18, s23 @ t5 + vadd.f s8, s4, s12 @ vector + vector + vsub.f s4, s12, s4 + vsub.f s5, s13, s5 + vsub.f s6, s14, s6 + vsub.f s7, s15, s7 + vsub.f s2, s17, s20 @ t2 + vadd.f s3, s19, s22 @ t6 + vstr d4, [\z0, #8*0] @ s8,s9 + vstr d5, [\z1, #8*o1] @ s10,s11 + vstr d2, [\z2, #8*o2] @ s4,s5 + vadd.f s4, s1, s0 @ t5 + vstr d3, [\z3, #8*o3] @ s6,s7 + vsub.f s7, s1, s0 @ t3 + vadd.f s5, s2, s3 @ t6 + vsub.f s6, s2, s3 @ t4 + vldr d6, [\z0, #8*1] @ s12,s13 + vldr d7, [\z1, #8*(o1+1)] @ s14,s15 + vadd.f s20, s4, s12 @ vector + vector + vsub.f s4, s12, s4 + vsub.f s5, s13, s5 + vsub.f s6, s14, s6 + vsub.f s7, s15, s7 + vstr d10, [\z0, #8*1] @ s20,s21 + vstr d11, [\z1, #8*(o1+1)] @ s22,s23 + vstr d2, [\z2, #8*(o2+1)] @ s4,s5 + vstr d3, [\z3, #8*(o3+1)] @ s6,s7 +.endm + +.macro def_fft n, n2, n4 +function .Lfft\n\()_internal_vfp + .if \n >= 512 + push {v1-v6,lr} + .elseif \n >= 256 + push {v1-v2,v5-v6,lr} + .else + push {v1,v5-v6,lr} + .endif + mov v1, a1 + bl .Lfft\n2\()_internal_vfp + add a1, v1, #8*(\n/4)*2 + bl .Lfft\n4\()_internal_vfp + movrelx v5, X(ff_cos_\n), a1 + add a1, v1, #8*(\n/4)*3 + bl .Lfft\n4\()_internal_vfp + .if \n >= 512 + .set o1, 0*(\n/4/2) + .set o2, 0*(\n/4/2) + .set o3, 0*(\n/4/2) + add v2, v1, #8*2*(\n/4/2) + add v3, v1, #8*4*(\n/4/2) + add v4, v1, #8*6*(\n/4/2) + pass (\n/4/2), v1, v2, v3, v4 + pop {v1-v6,pc} + .elseif \n >= 256 + .set o1, 2*(\n/4/2) + .set o2, 0*(\n/4/2) + .set o3, 2*(\n/4/2) + add v2, v1, #8*4*(\n/4/2) + pass (\n/4/2), v1, v1, v2, v2 + pop {v1-v2,v5-v6,pc} + .else + .set o1, 2*(\n/4/2) + .set o2, 4*(\n/4/2) + .set o3, 6*(\n/4/2) + pass (\n/4/2), v1, v1, v1, v1 + pop {v1,v5-v6,pc} + .endif +endfunc + +function fft\n\()_vfp + ldr a3, =0x03030000 /* RunFast mode, vector length 4, stride 1 */ + fmrx a2, FPSCR + fmxr FPSCR, a3 + vpush {s16-s31} + mov ip, lr + bl .Lfft\n\()_internal_vfp + vpop {s16-s31} + fmxr FPSCR, a2 + bx ip +endfunc + +.ltorg +.endm + + def_fft 32, 16, 8 + def_fft 64, 32, 16 + def_fft 128, 64, 32 + def_fft 256, 128, 64 + def_fft 512, 256, 128 + def_fft 1024, 512, 256 + def_fft 2048, 1024, 512 + def_fft 4096, 2048, 1024 + def_fft 8192, 4096, 2048 + def_fft 16384, 8192, 4096 + def_fft 32768, 16384, 8192 + def_fft 65536, 32768, 16384 |