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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-dsp-lib
* Created on: 31 мар. 2020 г.
*
* lsp-dsp-lib 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 3 of the License, or
* any later version.
*
* lsp-dsp-lib 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 lsp-dsp-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef PRIVATE_DSP_ARCH_X86_AVX_FASTCONV_BUTTERFLY_H_
#define PRIVATE_DSP_ARCH_X86_AVX_FASTCONV_BUTTERFLY_H_
#ifndef PRIVATE_DSP_ARCH_X86_AVX_IMPL
#error "This header should not be included directly"
#endif /* PRIVATE_DSP_ARCH_X86_AVX_IMPL */
namespace lsp
{
namespace avx
{
#define __SKIP(x)
// c = a - b
// a' = a + b
// b' = c * w
#define FASTCONV_DIRECT_BUTTERFLY_BODY8(add_re, add_im, FMA_SEL) \
ARCH_X86_ASM \
( \
/* Prepare angle */ \
__ASM_EMIT("vmovaps 0x00(%[ak]), %%ymm6") /* ymm6 = x_re */ \
__ASM_EMIT("vmovaps 0x20(%[ak]), %%ymm7") /* ymm7 = x_im */ \
/* Start loop */ \
__ASM_EMIT("1:") \
__ASM_EMIT("vmovups 0x00(%[dst], %[off1]), %%ymm0") /* ymm0 = a_re */ \
__ASM_EMIT("vmovups 0x20(%[dst], %[off1]), %%ymm1") /* ymm1 = a_im */ \
__ASM_EMIT("vmovups 0x00(%[dst], %[off2]), %%ymm2") /* ymm2 = b_re */ \
__ASM_EMIT("vmovups 0x20(%[dst], %[off2]), %%ymm3") /* ymm3 = b_im */ \
/* Perform butterfly */ \
__ASM_EMIT("vsubps %%ymm2, %%ymm0, %%ymm4") /* ymm4 = c_re = a_re - b_re */ \
__ASM_EMIT("vsubps %%ymm3, %%ymm1, %%ymm5") /* ymm5 = c_im = a_im - b_im */ \
__ASM_EMIT("vaddps %%ymm2, %%ymm0, %%ymm0") /* ymm0 = a_re' = a_re + b_re */ \
__ASM_EMIT("vaddps %%ymm3, %%ymm1, %%ymm1") /* ymm1 = a_im' = a_im + b_im */ \
__ASM_EMIT("vmulps %%ymm7, %%ymm4, %%ymm2") /* ymm2 = x_im * c_re */ \
__ASM_EMIT("vmulps %%ymm7, %%ymm5, %%ymm3") /* ymm3 = x_im * c_im */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm6, %%ymm4, %%ymm4", "")) /* ymm4 = x_re * c_re */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm6, %%ymm5, %%ymm5", "")) /* ymm5 = x_re * c_im */ \
__ASM_EMIT(FMA_SEL(add_re " %%ymm3, %%ymm4, %%ymm4", add_re " %%ymm6, %%ymm3, %%ymm4")) /* ymm4 = b_re = x_re * c_re +- x_im * c_im */ \
__ASM_EMIT(FMA_SEL(add_im " %%ymm2, %%ymm5, %%ymm5", add_im " %%ymm6, %%ymm2, %%ymm5")) /* ymm5 = b_im = x_re * c_im -+ x_im * c_re */ \
/* Store values */ \
__ASM_EMIT("vmovups %%ymm0, 0x00(%[dst], %[off1])") \
__ASM_EMIT("vmovups %%ymm1, 0x20(%[dst], %[off1])") \
__ASM_EMIT("vmovups %%ymm4, 0x00(%[dst], %[off2])") \
__ASM_EMIT("vmovups %%ymm5, 0x20(%[dst], %[off2])") \
__ASM_EMIT("add $0x40, %[off1]") \
__ASM_EMIT("add $0x40, %[off2]") \
__ASM_EMIT32("subl $8, %[np]") \
__ASM_EMIT64("subq $8, %[np]") \
__ASM_EMIT("jz 2f") \
/* Rotate angle */ \
__ASM_EMIT("vmovaps 0x00(%[wk]), %%ymm4") /* xmm4 = w_re */ \
__ASM_EMIT("vmovaps 0x20(%[wk]), %%ymm5") /* xmm5 = w_im */ \
__ASM_EMIT("vmulps %%ymm5, %%ymm6, %%ymm2") /* ymm2 = w_im * x_re */ \
__ASM_EMIT("vmulps %%ymm5, %%ymm7, %%ymm3") /* ymm3 = w_im * x_im */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm4, %%ymm6, %%ymm6", "")) /* ymm6 = w_re * x_re */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm4, %%ymm7, %%ymm7", "")) /* ymm7 = w_re * x_im */ \
__ASM_EMIT(FMA_SEL("vsubps %%ymm3, %%ymm6, %%ymm6", "vfmsub132ps %%ymm4, %%ymm3, %%ymm6")) /* ymm6 = x_re' = w_re * x_re - w_im * x_im */ \
__ASM_EMIT(FMA_SEL("vaddps %%ymm2, %%ymm7, %%ymm7", "vfmadd132ps %%ymm4, %%ymm2, %%ymm7")) /* ymm7 = x_im' = w_re * x_im + w_im * x_re */ \
/* Repeat loop */ \
__ASM_EMIT("jmp 1b") \
__ASM_EMIT("2:") \
\
: [off1] "+r" (off1), [off2] "+r" (off2), [np] __ASM_ARG_RW(np) \
: [dst] "r" (dst), [ak] "r" (ak), [wk] "r" (wk) \
: "cc", "memory", \
"%xmm0", "%xmm1", "%xmm2", "%xmm3", \
"%xmm4", "%xmm5", "%xmm6", "%xmm7" \
);
#define FASTCONV_DIRECT_BUTTERFLY_LAST(add_re, add_im, FMA_SEL) \
ARCH_X86_ASM( \
/* Loop 2x 4-element butterflies */ \
__ASM_EMIT("vmovaps 0x00 + %[FFT_A], %%ymm6") /* ymm6 = x_re */ \
__ASM_EMIT("vmovaps 0x20 + %[FFT_A], %%ymm7") /* ymm7 = x_im */ \
__ASM_EMIT("sub $2, %[nb]") \
__ASM_EMIT("jb 2f") \
__ASM_EMIT("1:") \
/* Load data to registers */ \
__ASM_EMIT("vmovups 0x00(%[dst]), %%xmm0") /* xmm0 = r0 r1 r2 r3 */ \
__ASM_EMIT("vmovups 0x10(%[dst]), %%xmm2") /* xmm2 = r4 r5 r6 r7 */ \
__ASM_EMIT("vmovups 0x20(%[dst]), %%xmm1") /* xmm1 = i0 i1 i2 i3 */ \
__ASM_EMIT("vmovups 0x30(%[dst]), %%xmm3") /* xmm3 = i4 i5 i6 i7 */ \
__ASM_EMIT("vinsertf128 $1, 0x40(%[dst]), %%ymm0, %%ymm0") /* ymm0 = a_re = r0 r1 r2 r3 r8 r9 r10 r11 */ \
__ASM_EMIT("vinsertf128 $1, 0x50(%[dst]), %%ymm2, %%ymm2") /* ymm2 = b_re = r4 r5 r6 r7 r12 r13 r14 r15 */ \
__ASM_EMIT("vinsertf128 $1, 0x60(%[dst]), %%ymm1, %%ymm1") /* ymm1 = a_im = i0 i1 i2 i3 i8 i9 i10 i11 */ \
__ASM_EMIT("vinsertf128 $1, 0x70(%[dst]), %%ymm3, %%ymm3") /* ymm3 = b_im = i4 i5 i6 i7 i12 i13 i14 i15 */ \
/* Perform 3rd-order butterflies */ \
__ASM_EMIT("vsubps %%ymm2, %%ymm0, %%ymm4") /* ymm4 = c_re = a_re - b_re */ \
__ASM_EMIT("vsubps %%ymm3, %%ymm1, %%ymm5") /* ymm5 = c_im = a_im - b_im */ \
__ASM_EMIT("vaddps %%ymm2, %%ymm0, %%ymm0") /* ymm0 = a_re' = a_re + b_re */ \
__ASM_EMIT("vaddps %%ymm3, %%ymm1, %%ymm1") /* ymm1 = a_im' = a_im + b_im */ \
__ASM_EMIT("vmulps %%ymm7, %%ymm4, %%ymm2") /* ymm2 = x_im * c_re */ \
__ASM_EMIT("vmulps %%ymm7, %%ymm5, %%ymm3") /* ymm3 = x_im * c_im */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm6, %%ymm4, %%ymm4", "")) /* ymm4 = x_re * c_re */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm6, %%ymm5, %%ymm5", "")) /* ymm5 = x_re * c_im */ \
__ASM_EMIT(FMA_SEL(add_re " %%ymm3, %%ymm4, %%ymm4", add_re " %%ymm6, %%ymm3, %%ymm4")) /* ymm4 = b_re = x_re * c_re +- x_im * c_im */ \
__ASM_EMIT(FMA_SEL(add_im " %%ymm2, %%ymm5, %%ymm5", add_im " %%ymm6, %%ymm2, %%ymm5")) /* ymm5 = b_im = x_re * c_im -+ x_im * c_re */ \
/* 2nd-order butterflies */ \
/* s0" = (r0 + r2) + j*(i0 + i2) + (r1 + r3) + j*(i1 + i3) */ \
/* s1" = (r0 + r2) + j*(i0 + i2) - (r1 + r3) - j*(i1 + i3) */ \
/* s2" = (r0 - r2) + j*(i0 - i2) + (i1 - i3) - j*(r1 - r3) */ \
/* s3" = (r0 - r2) + j*(i0 - i2) - (i1 - i3) + j*(r1 - r3) */ \
/* ymm0 = r0 r1 r2 r3 ... */ \
/* ymm1 = i0 i1 i2 i3 ... */ \
/* ymm4 = r4 r5 r6 r7 ... */ \
/* ymm5 = i4 i5 i6 i7 ... */ \
__ASM_EMIT("vshufps $0xd8, %%ymm0, %%ymm0, %%ymm0") /* ymm0 = r0 r2 r1 r3 */ \
__ASM_EMIT("vshufps $0xd8, %%ymm1, %%ymm1, %%ymm1") /* ymm1 = i0 i2 i1 i3 */ \
__ASM_EMIT("vshufps $0xd8, %%ymm4, %%ymm4, %%ymm4") \
__ASM_EMIT("vshufps $0xd8, %%ymm5, %%ymm5, %%ymm5") \
__ASM_EMIT("vhsubps %%ymm1, %%ymm0, %%ymm2") /* ymm2 = r0-r2 r1-r3 i0-i2 i1-i3 = r1' r3' i1' i3' */ \
__ASM_EMIT("vhsubps %%ymm5, %%ymm4, %%ymm3") \
__ASM_EMIT("vhaddps %%ymm1, %%ymm0, %%ymm0") /* ymm0 = r0+r2 r1+r3 i0+i2 i1+i3 = r0' r2' i0' i2' */ \
__ASM_EMIT("vhaddps %%ymm5, %%ymm4, %%ymm4") \
/* 1st-order 8x butterfly */ \
__ASM_EMIT("vshufps $0x6e, %%ymm2, %%ymm0, %%ymm1") /* ymm0 = i0' i2' i1' r3' */ \
__ASM_EMIT("vshufps $0x6e, %%ymm3, %%ymm4, %%ymm5") \
__ASM_EMIT("vshufps $0xc4, %%ymm2, %%ymm0, %%ymm0") /* ymm1 = r0' r2' r1' i3' */ \
__ASM_EMIT("vshufps $0xc4, %%ymm3, %%ymm4, %%ymm4") \
__ASM_EMIT("vhsubps %%ymm1, %%ymm0, %%ymm2") /* ymm2 = r0'-r2' r1'-i3' i0'-i2' i1'-r3' = r1" r3" i1" i2" */ \
__ASM_EMIT("vhsubps %%ymm5, %%ymm4, %%ymm3") \
__ASM_EMIT("vhaddps %%ymm1, %%ymm0, %%ymm0") /* ymm0 = r0'+r2' r1'+i3' i0'+i2' i1'+r3' = r0" r2" i0" i3" */ \
__ASM_EMIT("vhaddps %%ymm5, %%ymm4, %%ymm4") \
__ASM_EMIT("vblendps $0x88, %%ymm0, %%ymm2, %%ymm1") /* ymm1 = r1" r3" i1" i3" */ \
__ASM_EMIT("vblendps $0x88, %%ymm4, %%ymm3, %%ymm5") \
__ASM_EMIT("vblendps $0x88, %%ymm2, %%ymm0, %%ymm0") /* ymm0 = r0" r2" i0" i2" */ \
__ASM_EMIT("vblendps $0x88, %%ymm3, %%ymm4, %%ymm4") \
__ASM_EMIT("vunpckhps %%ymm1, %%ymm0, %%ymm3") /* ymm3 = r0" r1" r2" r3" */ \
__ASM_EMIT("vunpcklps %%ymm1, %%ymm0, %%ymm2") /* ymm2 = i0" i1" i2" i3" */ \
__ASM_EMIT("vunpckhps %%ymm5, %%ymm4, %%ymm1") \
__ASM_EMIT("vunpcklps %%ymm5, %%ymm4, %%ymm0") \
/* Store */ \
__ASM_EMIT("vmovups %%xmm2, 0x00(%[dst])") \
__ASM_EMIT("vmovups %%xmm0, 0x10(%[dst])") \
__ASM_EMIT("vmovups %%xmm3, 0x20(%[dst])") \
__ASM_EMIT("vmovups %%xmm1, 0x30(%[dst])") \
__ASM_EMIT("vextractf128 $1, %%ymm2, 0x40(%[dst])") \
__ASM_EMIT("vextractf128 $1, %%ymm0, 0x50(%[dst])") \
__ASM_EMIT("vextractf128 $1, %%ymm3, 0x60(%[dst])") \
__ASM_EMIT("vextractf128 $1, %%ymm1, 0x70(%[dst])") \
/* Move pointers and repeat*/ \
__ASM_EMIT("add $0x80, %[dst]") \
__ASM_EMIT("sub $2, %[nb]") \
__ASM_EMIT("jae 1b") \
__ASM_EMIT("2:") \
/* 1x 4-element butterflies */ \
__ASM_EMIT("add $1, %[nb]") \
__ASM_EMIT("jl 4f") \
__ASM_EMIT("vmovups 0x00(%[dst]), %%xmm0") /* xmm0 = r0 r1 r2 r3 */ \
__ASM_EMIT("vmovups 0x10(%[dst]), %%xmm2") /* xmm2 = r4 r5 r6 r7 */ \
__ASM_EMIT("vmovups 0x20(%[dst]), %%xmm1") /* xmm1 = i0 i1 i2 i3 */ \
__ASM_EMIT("vmovups 0x30(%[dst]), %%xmm3") /* xmm3 = i4 i5 i6 i7 */ \
/* Perform 3rd-order 8x butterfly */ \
__ASM_EMIT("vsubps %%xmm2, %%xmm0, %%xmm4") /* xmm4 = c_re = a_re - b_re */ \
__ASM_EMIT("vsubps %%xmm3, %%xmm1, %%xmm5") /* xmm5 = c_im = a_im - b_im */ \
__ASM_EMIT("vaddps %%xmm2, %%xmm0, %%xmm0") /* xmm0 = a_re' = a_re + b_re */ \
__ASM_EMIT("vaddps %%xmm3, %%xmm1, %%xmm1") /* xmm1 = a_im' = a_im + b_im */ \
__ASM_EMIT("vmulps %%xmm7, %%xmm4, %%xmm2") /* xmm2 = x_im * c_re */ \
__ASM_EMIT("vmulps %%xmm7, %%xmm5, %%xmm3") /* xmm3 = x_im * c_im */ \
__ASM_EMIT(FMA_SEL("vmulps %%xmm6, %%xmm4, %%xmm4", "")) /* xmm4 = x_re * c_re */ \
__ASM_EMIT(FMA_SEL("vmulps %%xmm6, %%xmm5, %%xmm5", "")) /* xmm5 = x_re * c_im */ \
__ASM_EMIT(FMA_SEL(add_re " %%xmm3, %%xmm4, %%xmm4", add_re " %%xmm6, %%xmm3, %%xmm4")) /* xmm4 = b_re = x_re * c_re +- x_im * c_im */ \
__ASM_EMIT(FMA_SEL(add_im " %%xmm2, %%xmm5, %%xmm5", add_im " %%xmm6, %%xmm2, %%xmm5")) /* xmm5 = b_im = x_re * c_im -+ x_im * c_re */ \
/* 2nd-order butterflies */ \
/* s0" = (r0 + r2) + j*(i0 + i2) + (r1 + r3) + j*(i1 + i3) */ \
/* s1" = (r0 + r2) + j*(i0 + i2) - (r1 + r3) - j*(i1 + i3) */ \
/* s2" = (r0 - r2) + j*(i0 - i2) + (i1 - i3) - j*(r1 - r3) */ \
/* s3" = (r0 - r2) + j*(i0 - i2) - (i1 - i3) + j*(r1 - r3) */ \
/* xmm0 = r0 r1 r2 r3 ... */ \
/* xmm1 = i0 i1 i2 i3 ... */ \
/* xmm4 = r4 r5 r6 r7 ... */ \
/* xmm5 = i4 i5 i6 i7 ... */ \
__ASM_EMIT("vshufps $0xd8, %%xmm0, %%xmm0, %%xmm0") /* xmm0 = r0 r2 r1 r3 */ \
__ASM_EMIT("vshufps $0xd8, %%xmm1, %%xmm1, %%xmm1") /* xmm1 = i0 i2 i1 i3 */ \
__ASM_EMIT("vshufps $0xd8, %%xmm4, %%xmm4, %%xmm4") \
__ASM_EMIT("vshufps $0xd8, %%xmm5, %%xmm5, %%xmm5") \
__ASM_EMIT("vhsubps %%xmm1, %%xmm0, %%xmm2") /* xmm2 = r0-r2 r1-r3 i0-i2 i1-i3 = r1' r3' i1' i3' */ \
__ASM_EMIT("vhsubps %%xmm5, %%xmm4, %%xmm3") \
__ASM_EMIT("vhaddps %%xmm1, %%xmm0, %%xmm0") /* xmm0 = r0+r2 r1+r3 i0+i2 i1+i3 = r0' r2' i0' i2' */ \
__ASM_EMIT("vhaddps %%xmm5, %%xmm4, %%xmm4") \
/* 1st-order butterflies */ \
__ASM_EMIT("vshufps $0x6e, %%xmm2, %%xmm0, %%xmm1") /* xmm0 = i0' i2' i1' r3' */ \
__ASM_EMIT("vshufps $0x6e, %%xmm3, %%xmm4, %%xmm5") \
__ASM_EMIT("vshufps $0xc4, %%xmm2, %%xmm0, %%xmm0") /* xmm1 = r0' r2' r1' i3' */ \
__ASM_EMIT("vshufps $0xc4, %%xmm3, %%xmm4, %%xmm4") \
__ASM_EMIT("vmovups %%xmm0, 0x00(%[dst])") \
__ASM_EMIT("vmovups %%xmm1, 0x10(%[dst])") \
__ASM_EMIT("vmovups %%xmm4, 0x20(%[dst])") \
__ASM_EMIT("vmovups %%xmm5, 0x30(%[dst])") \
__ASM_EMIT("vhsubps %%xmm1, %%xmm0, %%xmm2") /* xmm2 = r0'-r2' r1'-i3' i0'-i2' i1'-r3' = r1" r3" i1" i2" */ \
__ASM_EMIT("vhsubps %%xmm5, %%xmm4, %%xmm3") \
__ASM_EMIT("vhaddps %%xmm1, %%xmm0, %%xmm0") /* xmm0 = r0'+r2' r1'+i3' i0'+i2' i1'+r3' = r0" r2" i0" i3" */ \
__ASM_EMIT("vhaddps %%xmm5, %%xmm4, %%xmm4") \
__ASM_EMIT("vblendps $0x88, %%xmm0, %%xmm2, %%xmm1") /* xmm1 = r1" r3" i1" i3" */ \
__ASM_EMIT("vblendps $0x88, %%xmm4, %%xmm3, %%xmm5") \
__ASM_EMIT("vblendps $0x88, %%xmm2, %%xmm0, %%xmm0") /* xmm0 = r0" r2" i0" i2" */ \
__ASM_EMIT("vblendps $0x88, %%xmm3, %%xmm4, %%xmm4") \
__ASM_EMIT("vunpckhps %%xmm1, %%xmm0, %%xmm3") /* xmm3 = i0" i1" i2" i3" */ \
__ASM_EMIT("vunpcklps %%xmm1, %%xmm0, %%xmm2") /* xmm2 = r0" r1" r2" r3" */ \
__ASM_EMIT("vunpckhps %%xmm5, %%xmm4, %%xmm1") \
__ASM_EMIT("vunpcklps %%xmm5, %%xmm4, %%xmm0") \
/* Store */ \
__ASM_EMIT("vmovups %%xmm2, 0x00(%[dst])") \
__ASM_EMIT("vmovups %%xmm0, 0x10(%[dst])") \
__ASM_EMIT("vmovups %%xmm3, 0x20(%[dst])") \
__ASM_EMIT("vmovups %%xmm1, 0x30(%[dst])") \
__ASM_EMIT("4:") \
\
: [dst] "+r" (dst), [nb] "+r" (nb) \
: [FFT_A] "o" (FFT_A) \
: "cc", "memory", \
"%xmm0", "%xmm1", "%xmm2", "%xmm3", \
"%xmm4", "%xmm5", "%xmm6", "%xmm7" \
);
#define FASTCONV_REVERSE_BUTTERFLY_BODY8(add_re, add_im, FMA_SEL) \
ARCH_X86_ASM \
( \
/* Prepare angle */ \
__ASM_EMIT("vmovaps 0x00(%[ak]), %%ymm6") /* ymm6 = x_re */ \
__ASM_EMIT("vmovaps 0x20(%[ak]), %%ymm7") /* ymm7 = x_im */ \
/* Start loop */ \
__ASM_EMIT("1:") \
__ASM_EMIT("vmovups 0x00(%[dst], %[off1]), %%ymm0") /* ymm0 = a_re */ \
__ASM_EMIT("vmovups 0x20(%[dst], %[off1]), %%ymm1") /* ymm1 = a_im */ \
__ASM_EMIT("vmovups 0x00(%[dst], %[off2]), %%ymm2") /* ymm2 = b_re */ \
__ASM_EMIT("vmovups 0x20(%[dst], %[off2]), %%ymm3") /* ymm3 = b_im */ \
/* Calculate complex multiplication */ \
__ASM_EMIT("vmulps %%ymm7, %%ymm2, %%ymm4") /* ymm4 = x_im * b_re */ \
__ASM_EMIT("vmulps %%ymm7, %%ymm3, %%ymm5") /* ymm5 = x_im * b_im */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm6, %%ymm2, %%ymm2", "")) /* ymm2 = x_re * b_re */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm6, %%ymm3, %%ymm3", "")) /* ymm3 = x_re * b_im */ \
__ASM_EMIT(FMA_SEL(add_re " %%ymm5, %%ymm2, %%ymm5", add_re " %%ymm6, %%ymm2, %%ymm5")) /* ymm5 = c_re = x_re * b_re +- x_im * b_im */ \
__ASM_EMIT(FMA_SEL(add_im " %%ymm4, %%ymm3, %%ymm4", add_im " %%ymm6, %%ymm3, %%ymm4")) /* ymm4 = c_im = x_re * b_im -+ x_im * b_re */ \
/* Perform butterfly */ \
__ASM_EMIT("vsubps %%ymm5, %%ymm0, %%ymm2") /* ymm2 = a_re - c_re */ \
__ASM_EMIT("vsubps %%ymm4, %%ymm1, %%ymm3") /* ymm3 = a_im - c_im */ \
__ASM_EMIT("vaddps %%ymm5, %%ymm0, %%ymm0") /* ymm0 = a_re + c_re */ \
__ASM_EMIT("vaddps %%ymm4, %%ymm1, %%ymm1") /* ymm1 = a_im + c_im */ \
/* Store values */ \
__ASM_EMIT("vmovups %%ymm0, 0x00(%[dst], %[off1])") \
__ASM_EMIT("vmovups %%ymm1, 0x20(%[dst], %[off1])") \
__ASM_EMIT("vmovups %%ymm2, 0x00(%[dst], %[off2])") \
__ASM_EMIT("vmovups %%ymm3, 0x20(%[dst], %[off2])") \
__ASM_EMIT("add $0x40, %[off1]") \
__ASM_EMIT("add $0x40, %[off2]") \
__ASM_EMIT32("subl $8, %[np]") \
__ASM_EMIT64("subq $8, %[np]") \
__ASM_EMIT("jz 2f") \
/* Rotate angle */ \
__ASM_EMIT("vmovaps 0x00(%[wk]), %%ymm4") /* xmm4 = w_re */ \
__ASM_EMIT("vmovaps 0x20(%[wk]), %%ymm5") /* xmm5 = w_im */ \
__ASM_EMIT("vmulps %%ymm5, %%ymm6, %%ymm2") /* ymm2 = w_im * x_re */ \
__ASM_EMIT("vmulps %%ymm5, %%ymm7, %%ymm3") /* ymm3 = w_im * x_im */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm4, %%ymm6, %%ymm6", "")) /* ymm6 = w_re * x_re */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm4, %%ymm7, %%ymm7", "")) /* ymm7 = w_re * x_im */ \
__ASM_EMIT(FMA_SEL("vsubps %%ymm3, %%ymm6, %%ymm6", "vfmsub132ps %%ymm4, %%ymm3, %%ymm6")) /* ymm6 = x_re' = w_re * x_re - w_im * x_im */ \
__ASM_EMIT(FMA_SEL("vaddps %%ymm2, %%ymm7, %%ymm7", "vfmadd132ps %%ymm4, %%ymm2, %%ymm7")) /* ymm7 = x_im' = w_re * x_im + w_im * x_re */ \
/* Repeat loop */ \
__ASM_EMIT("jmp 1b") \
__ASM_EMIT("2:") \
\
: [off1] "+r" (off1), [off2] "+r" (off2), [np] __ASM_ARG_RW(np) \
: [dst] "r" (dst), [ak] "r" (ak), [wk] "r" (wk) \
: "cc", "memory", \
"%xmm0", "%xmm1", "%xmm2", "%xmm3", \
"%xmm4", "%xmm5", "%xmm6", "%xmm7" \
);
#define FASTCONV_REVERSE_BUTTERFLY_BODY_LAST(add_re, add_im, FMA_SEL, IF_ADD) \
size_t off; \
float norm = 0.5f / np; \
ARCH_X86_ASM \
( \
/* Prepare angle */ \
__ASM_EMIT("vbroadcastss %[norm], %%ymm1") /* ymm1 = k */ \
__ASM_EMIT("lea (,%[np], 4), %[off]") /* off = np * 8 */ \
__ASM_EMIT("vmovaps 0x00(%[ak]), %%ymm6") /* ymm6 = x_re */ \
__ASM_EMIT("vmovaps 0x20(%[ak]), %%ymm7") /* ymm7 = x_im */ \
__ASM_EMIT("vmovaps 0x00(%[wk]), %%ymm4") /* xmm4 = w_re */ \
__ASM_EMIT("vmovaps 0x20(%[wk]), %%ymm5") /* xmm5 = w_im */ \
/* Start loop */ \
__ASM_EMIT("1:") \
__ASM_EMIT("vmovups 0x00(%[src]), %%ymm0") /* ymm0 = a_re */ \
__ASM_EMIT("vmovups 0x00(%[src], %[off], 2), %%ymm2") /* ymm2 = b_re */ \
__ASM_EMIT("vmovups 0x20(%[src], %[off], 2), %%ymm3") /* ymm3 = b_im */ \
/* Calculate complex multiplication */ \
__ASM_EMIT("vmulps %%ymm7, %%ymm3, %%ymm3") /* ymm3 = x_im * b_im */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm6, %%ymm2, %%ymm2", "")) /* ymm2 = x_re * b_re */ \
__ASM_EMIT(FMA_SEL(add_re " %%ymm3, %%ymm2, %%ymm3", add_re " %%ymm6, %%ymm2, %%ymm3")) /* ymm3 = c_re = x_re * b_re +- x_im * b_im */ \
/* Perform butterfly */ \
__ASM_EMIT("vsubps %%ymm3, %%ymm0, %%ymm2") /* ymm2 = a_re - c_re */ \
__ASM_EMIT("vaddps %%ymm3, %%ymm0, %%ymm0") /* ymm0 = a_re + c_re */ \
__ASM_EMIT("vmulps %%ymm1, %%ymm2, %%ymm2") \
__ASM_EMIT("vmulps %%ymm1, %%ymm0, %%ymm0") \
/* Store values */ \
__ASM_EMIT(IF_ADD("vaddps 0x00(%[dst]), %%ymm0, %%ymm0")) \
__ASM_EMIT(IF_ADD("vaddps 0x00(%[dst], %[off]), %%ymm2, %%ymm2")) \
__ASM_EMIT("vmovups %%ymm0, 0x00(%[dst])") \
__ASM_EMIT("vmovups %%ymm2, 0x00(%[dst], %[off])") \
__ASM_EMIT("add $0x40, %[src]") \
__ASM_EMIT("add $0x20, %[dst]") \
__ASM_EMIT32("subl $8, %[np]") \
__ASM_EMIT64("subq $8, %[np]") \
__ASM_EMIT("jbe 2f") \
/* Rotate angle */ \
__ASM_EMIT("vmulps %%ymm5, %%ymm6, %%ymm2") /* ymm2 = w_im * x_re */ \
__ASM_EMIT("vmulps %%ymm5, %%ymm7, %%ymm3") /* ymm3 = w_im * x_im */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm4, %%ymm6, %%ymm6", "")) /* ymm6 = w_re * x_re */ \
__ASM_EMIT(FMA_SEL("vmulps %%ymm4, %%ymm7, %%ymm7", "")) /* ymm7 = w_re * x_im */ \
__ASM_EMIT(FMA_SEL("vsubps %%ymm3, %%ymm6, %%ymm6", "vfmsub132ps %%ymm4, %%ymm3, %%ymm6")) /* ymm6 = x_re' = w_re * x_re - w_im * x_im */ \
__ASM_EMIT(FMA_SEL("vaddps %%ymm2, %%ymm7, %%ymm7", "vfmadd132ps %%ymm4, %%ymm2, %%ymm7")) /* ymm7 = x_im' = w_re * x_im + w_im * x_re */ \
/* Repeat loop */ \
__ASM_EMIT("jmp 1b") \
__ASM_EMIT("2:") \
\
: [off] "=&r" (off), [np] __ASM_ARG_RW(np) \
: [dst] "r" (dst), [src] "r" (src), [ak] "r" (ak), [wk] "r" (wk), \
[norm] "o" (norm) \
: "cc", "memory", \
"%xmm0", "%xmm1", "%xmm2", "%xmm3", \
"%xmm4", "%xmm5", "%xmm6", "%xmm7" \
);
#define FMA_OFF(a, b) a
#define FMA_ON(a, b) b
#define FASTCONV_SET(x)
#define FASTCONV_ADD(x) x
static inline void fastconv_direct_butterfly(float *dst, const float *ak, const float *wk, size_t pairs, size_t nb)
{
size_t off1, off2, np;
off1 = 0;
size_t step = pairs << 3;
for (size_t i=0; i<nb; ++i)
{
off2 = off1 + step;
np = pairs;
FASTCONV_DIRECT_BUTTERFLY_BODY8("vaddps", "vsubps", FMA_OFF);
off1 = off2;
}
}
static inline void fastconv_direct_butterfly_last(float *dst, size_t nb)
{
FASTCONV_DIRECT_BUTTERFLY_LAST("vaddps", "vsubps", FMA_OFF);
}
static inline void fastconv_direct_butterfly_fma3(float *dst, const float *ak, const float *wk, size_t pairs, size_t nb)
{
size_t off1, off2, np;
off1 = 0;
size_t step = pairs << 3;
for (size_t i=0; i<nb; ++i)
{
off2 = off1 + step;
np = pairs;
FASTCONV_DIRECT_BUTTERFLY_BODY8("vfmadd132ps", "vfmsub132ps", FMA_ON);
off1 = off2;
}
}
static inline void fastconv_direct_butterfly_last_fma3(float *dst, size_t nb)
{
FASTCONV_DIRECT_BUTTERFLY_LAST("vfmadd132ps", "vfmsub132ps", FMA_ON);
}
static inline void fastconv_reverse_butterfly(float *dst, const float *ak, const float *wk, size_t pairs, size_t nb)
{
size_t off1, off2, np;
off1 = 0;
size_t step = pairs << 3;
for (size_t i=0; i<nb; ++i)
{
off2 = off1 + step;
np = pairs;
FASTCONV_REVERSE_BUTTERFLY_BODY8("vsubps", "vaddps", FMA_OFF);
off1 = off2;
}
}
static inline void fastconv_reverse_butterfly_last(float *dst, const float *src, const float *ak, const float *wk, size_t np)
{
FASTCONV_REVERSE_BUTTERFLY_BODY_LAST("vsubps", "vaddps", FMA_OFF, FASTCONV_SET);
}
static inline void fastconv_reverse_butterfly_last_adding(float *dst, const float *src, const float *ak, const float *wk, size_t np)
{
FASTCONV_REVERSE_BUTTERFLY_BODY_LAST("vsubps", "vaddps", FMA_OFF, FASTCONV_ADD);
}
static inline void fastconv_reverse_butterfly_fma3(float *dst, const float *ak, const float *wk, size_t pairs, size_t nb)
{
size_t off1, off2, np;
off1 = 0;
size_t step = pairs << 3;
for (size_t i=0; i<nb; ++i)
{
off2 = off1 + step;
np = pairs;
FASTCONV_REVERSE_BUTTERFLY_BODY8("vfmsub231ps", "vfmadd231ps", FMA_ON);
off1 = off2;
}
}
static inline void fastconv_reverse_butterfly_last_fma3(float *dst, const float *src, const float *ak, const float *wk, size_t np)
{
FASTCONV_REVERSE_BUTTERFLY_BODY_LAST("vfmsub231ps", "vfmadd231ps", FMA_ON, FASTCONV_SET);
}
static inline void fastconv_reverse_butterfly_last_adding_fma3(float *dst, const float *src, const float *ak, const float *wk, size_t np)
{
FASTCONV_REVERSE_BUTTERFLY_BODY_LAST("vfmsub231ps", "vfmadd231ps", FMA_ON, FASTCONV_ADD);
}
#undef FASTCONV_DIRECT_BUTTERFLY_BODY8
#undef FASTCONV_DIRECT_BUTTERFLY_LAST
#undef FASTCONV_REVERSE_BUTTERFLY_BODY8
#undef FASTCONV_REVERSE_BUTTERFLY_LAST
#undef FASTCONV_SET
#undef FASTCONV_ADD
#undef FMA_OFF
#undef FMA_ON
}
}
#endif /* PRIVATE_DSP_ARCH_X86_AVX_FASTCONV_BUTTERFLY_H_ */
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