/*
 * 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_PCOMPLEX_H_
#define PRIVATE_DSP_ARCH_X86_AVX_PCOMPLEX_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
    {
        IF_ARCH_X86(
            static uint32_t pcomplex_div_const[] __lsp_aligned32 =
            {
                LSP_DSP_VEC8(0x3f800000),   // 1.0
                LSP_DSP_VEC8(0x80000000)    // signbit
            };
        )

        #define FMA_OFF(a, b)       a
        #define FMA_ON(a, b)        b

        #define PCOMPLEX_MULX_CORE(DST, SRC1, SRC2, SEL) \
            /* Init */ \
            __ASM_EMIT("xor         %[off], %[off]") \
            /* x8 block */ \
            __ASM_EMIT("sub         $8, %[count]") \
            __ASM_EMIT("jb          2f") \
            __ASM_EMIT("1:") \
            __ASM_EMIT("vmovsldup   0x00(%[" SRC1 "], %[off]), %%ymm0")     /* ymm0 = ar0 ar0 */ \
            __ASM_EMIT("vmovsldup   0x20(%[" SRC1 "], %[off]), %%ymm1") \
            __ASM_EMIT("vmovups     0x00(%[" SRC2 "], %[off]), %%ymm6")     /* ymm6 = br0 bi0 */ \
            __ASM_EMIT("vmovups     0x20(%[" SRC2 "], %[off]), %%ymm7") \
            __ASM_EMIT("vshufps     $0xb1, %%ymm6, %%ymm6, %%ymm4")         /* ymm4 = bi0 br0 */ \
            __ASM_EMIT("vmovshdup   0x00(%[" SRC1 "], %[off]), %%ymm2")     /* ymm2 = ai0 ai0 */ \
            __ASM_EMIT("vmovshdup   0x20(%[" SRC1 "], %[off]), %%ymm3") \
            __ASM_EMIT("vshufps     $0xb1, %%ymm7, %%ymm7, %%ymm5") \
            __ASM_EMIT(SEL("vmulps      %%ymm6, %%ymm0, %%ymm0", ""))       /* ymm0 = ar0*br0 ar0*bi0 */ \
            __ASM_EMIT(SEL("vmulps      %%ymm7, %%ymm1, %%ymm1", "")) \
            __ASM_EMIT("vmulps      %%ymm4, %%ymm2, %%ymm2")                /* ymm2 = ai0*bi0 ai0*br0 */ \
            __ASM_EMIT("vmulps      %%ymm5, %%ymm3, %%ymm3") \
            __ASM_EMIT(SEL("vaddsubps   %%ymm2, %%ymm0, %%ymm0", "vfmaddsub132ps %%ymm6, %%ymm2, %%ymm0"))   /* ymm0 = ar0*br0-ai0*bi0 ar0*bi0+ai0*br0 ... */ \
            __ASM_EMIT(SEL("vaddsubps   %%ymm3, %%ymm1, %%ymm1", "vfmaddsub132ps %%ymm7, %%ymm3, %%ymm1")) \
            __ASM_EMIT("vmovups     %%ymm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("vmovups     %%ymm1, 0x20(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x40, %[off]") \
            __ASM_EMIT("sub         $8, %[count]") \
            __ASM_EMIT("jae         1b") \
            __ASM_EMIT("2:") \
            /* x4 block */ \
            __ASM_EMIT("add         $4, %[count]") \
            __ASM_EMIT("jl          4f") \
            __ASM_EMIT("vmovups     0x00(%[" SRC2 "], %[off]), %%ymm6")     /* ymm6 = br0 bi0 */ \
            __ASM_EMIT("vmovsldup   0x00(%[" SRC1 "], %[off]), %%ymm0")     /* ymm0 = ar0 ar0 */ \
            __ASM_EMIT("vmovshdup   0x00(%[" SRC1 "], %[off]), %%ymm2")     /* ymm2 = ai0 ai0 */ \
            __ASM_EMIT("vshufps     $0xb1, %%ymm6, %%ymm6, %%ymm4")         /* xmm4 = bi0 br0 */ \
            __ASM_EMIT(SEL("vmulps      %%ymm6, %%ymm0, %%ymm0", ""))       /* ymm0 = ar0*br0 ar0*bi0 */ \
            __ASM_EMIT("vmulps      %%ymm4, %%ymm2, %%ymm2")                /* ymm2 = ai0*bi0 ai0*br0 */ \
            __ASM_EMIT(SEL("vaddsubps   %%ymm2, %%ymm0, %%ymm0", "vfmaddsub132ps %%ymm6, %%ymm2, %%ymm0"))   /* ymm0 = ar0*br0-ai0*bi0 ar0*bi0+ai0*br0 ... */ \
            __ASM_EMIT("vmovups     %%ymm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x20, %[off]") \
            __ASM_EMIT("sub         $4, %[count]") \
            __ASM_EMIT("4:") \
            /* x2 block */ \
            __ASM_EMIT("add         $2, %[count]") \
            __ASM_EMIT("jl          6f") \
            __ASM_EMIT("vmovups     0x00(%[" SRC2 "], %[off]), %%xmm6")     /* xmm6 = br0 bi0 */ \
            __ASM_EMIT("vmovsldup   0x00(%[" SRC1 "], %[off]), %%xmm0")     /* xmm0 = ar0 ar0 */ \
            __ASM_EMIT("vmovshdup   0x00(%[" SRC1 "], %[off]), %%xmm2")     /* xmm2 = ai0 ai0 */ \
            __ASM_EMIT("vshufps     $0xb1, %%xmm6, %%xmm6, %%xmm4")         /* xmm4 = bi0 br0 */ \
            __ASM_EMIT(SEL("vmulps      %%xmm6, %%xmm0, %%xmm0", ""))       /* xmm0 = ar0*br0 ar0*bi0 */ \
            __ASM_EMIT("vmulps      %%xmm4, %%xmm2, %%xmm2")                /* xmm2 = ai0*bi0 ai0*br0 */ \
            __ASM_EMIT(SEL("vaddsubps   %%xmm2, %%xmm0, %%xmm0", "vfmaddsub132ps %%xmm6, %%xmm2, %%xmm0"))   /* xmm0 = ar0*br0-ai0*bi0 ar0*bi0+ai0*br0 ... */ \
            __ASM_EMIT("vmovups     %%xmm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x10, %[off]") \
            __ASM_EMIT("sub         $2, %[count]") \
            __ASM_EMIT("6:") \
            /* x1 block */ \
            __ASM_EMIT("add         $1, %[count]") \
            __ASM_EMIT("jl          8f") \
            __ASM_EMIT("vmovlps     0x00(%[" SRC1 "], %[off]), %%xmm4, %%xmm4")     /* xmm4 = ar0 ai0 */ \
            __ASM_EMIT("vmovlps     0x00(%[" SRC2 "], %[off]), %%xmm6, %%xmm6")     /* xmm6 = br0 bi0 */ \
            __ASM_EMIT("vmovsldup   %%xmm4, %%xmm0")                        /* xmm0 = ar0 ar0 */ \
            __ASM_EMIT("vmovshdup   %%xmm4, %%xmm2")                        /* xmm2 = ai0 ai0 */ \
            __ASM_EMIT("vshufps     $0xb1, %%xmm6, %%xmm6, %%xmm4")         /* xmm4 = bi0 br0 */ \
            __ASM_EMIT(SEL("vmulps      %%xmm6, %%xmm0, %%xmm0", ""))       /* xmm0 = ar0*br0 ar0*bi0 */ \
            __ASM_EMIT("vmulps      %%xmm4, %%xmm2, %%xmm2")                /* xmm2 = ai0*bi0 ai0*br0 */ \
            __ASM_EMIT(SEL("vaddsubps   %%xmm2, %%xmm0, %%xmm0", "vfmaddsub132ps %%xmm6, %%xmm2, %%xmm0"))   /* xmm0 = ar0*br0-ai0*bi0 ar0*bi0+ai0*br0 ... */ \
            __ASM_EMIT("vmovlps     %%xmm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("8:") \
            /* end */

        /*
         * Register allocation:
         * ymm4     = a1
         * ymm5     = a2
         * ymm6     = b1
         * ymm7     = b2
         */
        void pcomplex_mul3(float *dst, const float *src1, const float *src2, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_MULX_CORE("dst", "src1", "src2", FMA_OFF)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src1] "r" (src1), [src2] "r" (src2)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_mul2(float *dst, const float *src, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_MULX_CORE("dst", "dst", "src", FMA_OFF)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src] "r" (src)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_mul3_fma3(float *dst, const float *src1, const float *src2, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_MULX_CORE("dst", "src1", "src2", FMA_ON)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src1] "r" (src1), [src2] "r" (src2)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_mul2_fma3(float *dst, const float *src, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_MULX_CORE("dst", "dst", "src", FMA_ON)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src] "r" (src)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        #undef PCOMPLEX_MULX_CORE

        void pcomplex_mod(float *dst, const float *src, size_t count)
        {
            // Strided-load technique is used to improve performance
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                __ASM_EMIT("xor             %[off], %[off]")
                // 16x blocks
                __ASM_EMIT("sub             $16, %[count]")
                __ASM_EMIT("jb              2f")
                __ASM_EMIT("1:")
                __ASM_EMIT("vmovups         0x000(%[src], %[off], 2), %%xmm0")
                __ASM_EMIT("vmovups         0x010(%[src], %[off], 2), %%xmm2")
                __ASM_EMIT("vinsertf128     $1, 0x020(%[src], %[off], 2), %%ymm0, %%ymm0")
                __ASM_EMIT("vinsertf128     $1, 0x030(%[src], %[off], 2), %%ymm2, %%ymm2")
                __ASM_EMIT("vmovups         0x040(%[src], %[off], 2), %%xmm1")
                __ASM_EMIT("vmovups         0x050(%[src], %[off], 2), %%xmm3")
                __ASM_EMIT("vinsertf128     $1, 0x060(%[src], %[off], 2), %%ymm1, %%ymm1")
                __ASM_EMIT("vinsertf128     $1, 0x070(%[src], %[off], 2), %%ymm3, %%ymm3")
                __ASM_EMIT("vmulps          %%ymm0, %%ymm0, %%ymm0")
                __ASM_EMIT("vmulps          %%ymm2, %%ymm2, %%ymm2")
                __ASM_EMIT("vmulps          %%ymm1, %%ymm1, %%ymm1")
                __ASM_EMIT("vmulps          %%ymm3, %%ymm3, %%ymm3")
                __ASM_EMIT("vhaddps         %%ymm2, %%ymm0, %%ymm0")
                __ASM_EMIT("vhaddps         %%ymm3, %%ymm1, %%ymm1")
                __ASM_EMIT("vsqrtps         %%ymm0, %%ymm0")
                __ASM_EMIT("vsqrtps         %%ymm1, %%ymm1")
                __ASM_EMIT("vmovups         %%ymm0, 0x00(%[dst], %[off])")
                __ASM_EMIT("vmovups         %%ymm1, 0x20(%[dst], %[off])")
                __ASM_EMIT("add             $0x40, %[off]")
                __ASM_EMIT("sub             $16, %[count]")
                __ASM_EMIT("jae             1b")
                __ASM_EMIT("2:")
                // 8x block
                __ASM_EMIT("add             $8, %[count]")
                __ASM_EMIT("jl              4f")
                __ASM_EMIT("vmovups         0x000(%[src], %[off], 2), %%xmm0")
                __ASM_EMIT("vmovups         0x010(%[src], %[off], 2), %%xmm2")
                __ASM_EMIT("vinsertf128     $1, 0x020(%[src], %[off], 2), %%ymm0, %%ymm0")
                __ASM_EMIT("vinsertf128     $1, 0x030(%[src], %[off], 2), %%ymm2, %%ymm2")
                __ASM_EMIT("vmulps          %%ymm0, %%ymm0, %%ymm0")
                __ASM_EMIT("vmulps          %%ymm2, %%ymm2, %%ymm2")
                __ASM_EMIT("vhaddps         %%ymm2, %%ymm0, %%ymm0")
                __ASM_EMIT("vsqrtps         %%ymm0, %%ymm0")
                __ASM_EMIT("vmovups         %%ymm0, 0x00(%[dst], %[off])")
                __ASM_EMIT("sub             $8, %[count]")
                __ASM_EMIT("add             $0x20, %[off]")
                __ASM_EMIT("4:")
                // 4x block
                __ASM_EMIT("add             $4, %[count]")
                __ASM_EMIT("jl              6f")
                __ASM_EMIT("5:")
                __ASM_EMIT("vmovups         0x000(%[src], %[off], 2), %%xmm0")
                __ASM_EMIT("vmovups         0x010(%[src], %[off], 2), %%xmm2")
                __ASM_EMIT("vmulps          %%xmm0, %%xmm0, %%xmm0")
                __ASM_EMIT("vmulps          %%xmm2, %%xmm2, %%xmm2")
                __ASM_EMIT("vhaddps         %%xmm2, %%xmm0, %%xmm0")
                __ASM_EMIT("vsqrtps         %%xmm0, %%xmm0")
                __ASM_EMIT("vmovups         %%xmm0, 0x00(%[dst], %[off])")
                __ASM_EMIT("sub             $4, %[count]")
                __ASM_EMIT("add             $0x10, %[off]")
                __ASM_EMIT("6:")
                // 2x block
                __ASM_EMIT("add             $2, %[count]")
                __ASM_EMIT("jl              8f")
                __ASM_EMIT("vmovups         0x000(%[src], %[off], 2), %%xmm0")
                __ASM_EMIT("vmulps          %%xmm0, %%xmm0, %%xmm0")
                __ASM_EMIT("vhaddps         %%xmm0, %%xmm0, %%xmm0")
                __ASM_EMIT("vsqrtps         %%xmm0, %%xmm0")
                __ASM_EMIT("vmovlps         %%xmm0, 0x00(%[dst], %[off])")
                __ASM_EMIT("sub             $2, %[count]")
                __ASM_EMIT("add             $0x08, %[off]")
                __ASM_EMIT("8:")
                // 1x block
                __ASM_EMIT("add             $1, %[count]")
                __ASM_EMIT("jl              10f")
                __ASM_EMIT("vmovlps         0x000(%[src], %[off], 2), %%xmm0, %%xmm0")
                __ASM_EMIT("vmulps          %%xmm0, %%xmm0, %%xmm0")
                __ASM_EMIT("vhaddps         %%xmm0, %%xmm0, %%xmm0")
                __ASM_EMIT("vsqrtps         %%xmm0, %%xmm0")
                __ASM_EMIT("vmovss          %%xmm0, 0x00(%[dst], %[off])")
                __ASM_EMIT("10:")
                // End

                : [count] "+r" (count), [off] "=&r" (off)
                : [dst] "r" (dst), [src] "r" (src)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        #define PCOMPLEX_DIV_CORE(DST, T, B, SEL) \
            /* Init */ \
            __ASM_EMIT("xor         %[off], %[off]") \
            /* x8 block */ \
            __ASM_EMIT("sub         $8, %[count]") \
            __ASM_EMIT("jb          2f") \
            __ASM_EMIT("1:") \
            __ASM_EMIT("vmovups     0x00(%[" B "], %[off]), %%ymm6")        /* ymm6 = br0 bi0 */ \
            __ASM_EMIT("vmovups     0x20(%[" B "], %[off]), %%ymm7") \
            __ASM_EMIT("vmovaps     0x00 + %[CC], %%ymm3")                  /* ymm3 = 1 */ \
            __ASM_EMIT("vmulps      %%ymm6, %%ymm6, %%ymm4")                /* ymm4 = br0*br0 bi0*bi0 */ \
            __ASM_EMIT("vmulps      %%ymm7, %%ymm7, %%ymm5") \
            __ASM_EMIT("vhaddps     %%ymm5, %%ymm4, %%ymm2")                /* ymm2 = R = br0*br0+bi0*bi0 */ \
            __ASM_EMIT("vmovsldup   0x00(%[" T "], %[off]), %%ymm0")        /* ymm0 = ar0 ar0 */ \
            __ASM_EMIT("vdivps      %%ymm2, %%ymm3, %%ymm3")                /* ymm3 = 1/R */ \
            __ASM_EMIT("vmovsldup   0x20(%[" T "], %[off]), %%ymm1") \
            __ASM_EMIT("vxorps      0x20 + %[CC], %%ymm3, %%ymm5")          /* ymm5 = -1/R */ \
            __ASM_EMIT("vmovshdup   0x00(%[" T "], %[off]), %%ymm2")        /* ymm2 = ai0 ai0 */ \
            __ASM_EMIT("vunpcklps   %%ymm5, %%ymm3, %%ymm4")                /* ymm4 = 1/R -1/R */ \
            __ASM_EMIT("vmulps      %%ymm6, %%ymm0, %%ymm0")                /* ymm0 = ar0*br0 ar0*bi0 */ \
            __ASM_EMIT("vunpckhps   %%ymm5, %%ymm3, %%ymm5") \
            __ASM_EMIT("vmulps      %%ymm7, %%ymm1, %%ymm1") \
            __ASM_EMIT("vmovshdup   0x20(%[" T "], %[off]), %%ymm3") \
            __ASM_EMIT("vshufps     $0xb1, %%ymm6, %%ymm6, %%ymm6")         /* ymm6 = bi0 br0 */ \
            __ASM_EMIT("vshufps     $0xb1, %%ymm7, %%ymm7, %%ymm7") \
            __ASM_EMIT(SEL("vmulps  %%ymm6, %%ymm2, %%ymm2", ""))           /* ymm2 = ai0*bi0 ai0*br0 */ \
            __ASM_EMIT(SEL("vmulps  %%ymm7, %%ymm3, %%ymm3", "")) \
            __ASM_EMIT(SEL("vaddps  %%ymm2, %%ymm0, %%ymm0", "vfmadd231ps %%ymm6, %%ymm2, %%ymm0")) /* ymm0 = r i = ar0*br0+ai0*bi0 ar0*bi0+ai0*br0 ... */ \
            __ASM_EMIT(SEL("vaddps  %%ymm3, %%ymm1, %%ymm1", "vfmadd231ps %%ymm7, %%ymm3, %%ymm1")) \
            __ASM_EMIT("vmulps      %%ymm4, %%ymm0, %%ymm0")                /* ymm0 = r/R -i/R */ \
            __ASM_EMIT("vmulps      %%ymm5, %%ymm1, %%ymm1") \
            __ASM_EMIT("vmovups     %%ymm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("vmovups     %%ymm1, 0x20(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x40, %[off]") \
            __ASM_EMIT("sub         $8, %[count]") \
            __ASM_EMIT("jae         1b") \
            __ASM_EMIT("2:") \
            /* x4 block */ \
            __ASM_EMIT("add         $4, %[count]") \
            __ASM_EMIT("jl          4f") \
            __ASM_EMIT("vmovups     0x00(%[" B "], %[off]), %%ymm6")        /* ymm6 = br0 bi0 */ \
            __ASM_EMIT("vmovaps     0x00 + %[CC], %%ymm3")                  /* ymm3 = 1 */ \
            __ASM_EMIT("vmulps      %%ymm6, %%ymm6, %%ymm4")                /* ymm4 = br0*br0 bi0*bi0 */ \
            __ASM_EMIT("vhaddps     %%ymm5, %%ymm4, %%ymm2")                /* ymm2 = R = br0*br0+bi0*bi0 */ \
            __ASM_EMIT("vdivps      %%ymm2, %%ymm3, %%ymm3")                /* ymm3 = 1/R */ \
            __ASM_EMIT("vmovsldup   0x00(%[" T "], %[off]), %%ymm0")        /* ymm0 = ar0 ar0 */ \
            __ASM_EMIT("vxorps      0x20 + %[CC], %%ymm3, %%ymm5")          /* ymm5 = -1/R */ \
            __ASM_EMIT("vmovshdup   0x00(%[" T "], %[off]), %%ymm2")        /* ymm2 = ai0 ai0 */ \
            __ASM_EMIT("vunpcklps   %%ymm5, %%ymm3, %%ymm4")                /* ymm4 = 1/R -1/R */ \
            __ASM_EMIT("vmulps      %%ymm6, %%ymm0, %%ymm0")                /* ymm0 = ar0*br0 ar0*bi0 */ \
            __ASM_EMIT("vunpckhps   %%ymm5, %%ymm3, %%ymm5") \
            __ASM_EMIT("vshufps     $0xb1, %%ymm6, %%ymm6, %%ymm6")         /* ymm6 = bi0 br0 */ \
            __ASM_EMIT(SEL("vmulps  %%ymm6, %%ymm2, %%ymm2", ""))           /* ymm2 = ai0*bi0 ai0*br0 */ \
            __ASM_EMIT(SEL("vaddps  %%ymm2, %%ymm0, %%ymm0", "vfmadd231ps %%ymm6, %%ymm2, %%ymm0")) /* ymm0 = r i = ar0*br0+ai0*bi0 ar0*bi0+ai0*br0 ... */ \
            __ASM_EMIT("vmulps      %%ymm4, %%ymm0, %%ymm0")                /* ymm0 = r/R -i/R */ \
            __ASM_EMIT("vmovups     %%ymm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x20, %[off]") \
            __ASM_EMIT("sub         $4, %[count]") \
            __ASM_EMIT("4:") \
            /* x2 block */ \
            __ASM_EMIT("add         $2, %[count]") \
            __ASM_EMIT("jl          6f") \
            __ASM_EMIT("vmovups     0x00(%[" B "], %[off]), %%xmm6")        /* xmm6 = br0 bi0 */ \
            __ASM_EMIT("vmovaps     0x00 + %[CC], %%xmm3")                  /* xmm3 = 1 */ \
            __ASM_EMIT("vmulps      %%xmm6, %%xmm6, %%xmm4")                /* xmm4 = br0*br0 bi0*bi0 */ \
            __ASM_EMIT("vhaddps     %%xmm5, %%xmm4, %%xmm2")                /* xmm2 = R = br0*br0+bi0*bi0 */ \
            __ASM_EMIT("vmovsldup   0x00(%[" T "], %[off]), %%xmm0")        /* xmm0 = ar0 ar0 */ \
            __ASM_EMIT("vdivps      %%xmm2, %%xmm3, %%xmm3")                /* xmm3 = 1/R */ \
            __ASM_EMIT("vmovshdup   0x00(%[" T "], %[off]), %%xmm2")        /* xmm2 = ai0 ai0 */ \
            __ASM_EMIT("vxorps      0x20 + %[CC], %%xmm3, %%xmm5")          /* xmm5 = -1/R */ \
            __ASM_EMIT("vmulps      %%xmm6, %%xmm0, %%xmm0")                /* xmm0 = ar0*br0 ar0*bi0 */ \
            __ASM_EMIT("vunpcklps   %%xmm5, %%xmm3, %%xmm4")                /* xmm4 = 1/R -1/R */ \
            __ASM_EMIT("vshufps     $0xb1, %%xmm6, %%xmm6, %%xmm6")         /* xmm6 = bi0 br0 */ \
            __ASM_EMIT(SEL("vmulps  %%xmm6, %%xmm2, %%xmm2", ""))           /* xmm2 = ai0*bi0 ai0*br0 */ \
            __ASM_EMIT(SEL("vaddps  %%xmm2, %%xmm0, %%xmm0", "vfmadd231ps %%xmm6, %%xmm2, %%xmm0")) /* xmm0 = r i = ar0*br0+ai0*bi0 ar0*bi0+ai0*br0 ... */ \
            __ASM_EMIT("vmulps      %%xmm4, %%xmm0, %%xmm0")                /* xmm0 = r/R -i/R */ \
            __ASM_EMIT("vmovups     %%xmm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x10, %[off]") \
            __ASM_EMIT("sub         $2, %[count]") \
            __ASM_EMIT("6:") \
            /* x1 block */ \
            __ASM_EMIT("add         $1, %[count]") \
            __ASM_EMIT("jl          8f") \
            __ASM_EMIT("vmovlps     0x00(%[" B "], %[off]), %%xmm6, %%xmm6")/* xmm6 = br0 bi0 */ \
            __ASM_EMIT("vmovaps     0x00 + %[CC], %%xmm3")                  /* xmm3 = 1 */ \
            __ASM_EMIT("vmulps      %%xmm6, %%xmm6, %%xmm4")                /* xmm4 = br0*br0 bi0*bi0 */ \
            __ASM_EMIT("vhaddps     %%xmm5, %%xmm4, %%xmm2")                /* xmm2 = R = br0*br0+bi0*bi0 */ \
            __ASM_EMIT("vdivps      %%xmm2, %%xmm3, %%xmm3")                /* xmm3 = 1/R */ \
            __ASM_EMIT("vxorps      0x20 + %[CC], %%xmm3, %%xmm5")          /* xmm5 = -1/R */ \
            __ASM_EMIT("vmovlps     0x00(%[" T "], %[off]), %%xmm2, %%xmm2") \
            __ASM_EMIT("vunpcklps   %%xmm5, %%xmm3, %%xmm4")                /* xmm4 = 1/R -1/R */ \
            __ASM_EMIT("vmovsldup   %%xmm2, %%xmm0")                        /* xmm0 = ar0 ar0 */ \
            __ASM_EMIT("vmovshdup   %%xmm2, %%xmm2")                        /* xmm2 = ai0 ai0 */ \
            __ASM_EMIT("vmulps      %%xmm6, %%xmm0, %%xmm0")                /* xmm0 = ar0*br0 ar0*bi0 */ \
            __ASM_EMIT("vshufps     $0xb1, %%xmm6, %%xmm6, %%xmm6")         /* xmm6 = bi0 br0 */ \
            __ASM_EMIT(SEL("vmulps  %%xmm6, %%xmm2, %%xmm2", ""))           /* xmm2 = ai0*bi0 ai0*br0 */ \
            __ASM_EMIT(SEL("vaddps  %%xmm2, %%xmm0, %%xmm0", "vfmadd231ps %%xmm6, %%xmm2, %%xmm0")) /* xmm0 = r i = ar0*br0+ai0*bi0 ar0*bi0+ai0*br0 ... */ \
            __ASM_EMIT("vmulps      %%xmm4, %%xmm0, %%xmm0")                /* xmm0 = r/R -i/R */ \
            __ASM_EMIT("vmovlps     %%xmm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("8:") \
            /* end */

        void pcomplex_div3(float *dst, const float *t, const float *b, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_DIV_CORE("dst", "t", "b", FMA_OFF)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [t] "r" (t), [b] "r" (b),
                  [CC] "o" (pcomplex_div_const)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_div2(float *dst, const float *src, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_DIV_CORE("dst", "dst", "src", FMA_OFF)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src] "r" (src),
                  [CC] "o" (pcomplex_div_const)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_rdiv2(float *dst, const float *src, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_DIV_CORE("dst", "src", "dst", FMA_OFF)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src] "r" (src),
                  [CC] "o" (pcomplex_div_const)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_div3_fma3(float *dst, const float *t, const float *b, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_DIV_CORE("dst", "t", "b", FMA_ON)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [t] "r" (t), [b] "r" (b),
                  [CC] "o" (pcomplex_div_const)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_div2_fma3(float *dst, const float *src, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_DIV_CORE("dst", "dst", "src", FMA_ON)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src] "r" (src),
                  [CC] "o" (pcomplex_div_const)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_rdiv2_fma3(float *dst, const float *src, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_DIV_CORE("dst", "src", "dst", FMA_ON)
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src] "r" (src),
                  [CC] "o" (pcomplex_div_const)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        #undef PCOMPLEX_DIV_CORE

        #define PCOMPLEX_RCP_CORE(DST, SRC) \
            /* Init */ \
            __ASM_EMIT("xor         %[off], %[off]") \
            /* x16 block */ \
            __ASM_EMIT("sub         $16, %[count]") \
            __ASM_EMIT("jb          2f") \
            __ASM_EMIT("1:") \
            __ASM_EMIT("vmovups     0x00(%[" SRC "], %[off]), %%ymm0")      /* ymm0 = r0 i0 */ \
            __ASM_EMIT("vmovups     0x20(%[" SRC "], %[off]), %%ymm1") \
            __ASM_EMIT("vmovups     0x40(%[" SRC "], %[off]), %%ymm2") \
            __ASM_EMIT("vmovups     0x60(%[" SRC "], %[off]), %%ymm3") \
            __ASM_EMIT("vmulps      %%ymm0, %%ymm0, %%ymm4")                /* ymm0 = r0*r0 + i0*i0 */ \
            __ASM_EMIT("vmulps      %%ymm1, %%ymm1, %%ymm5") \
            __ASM_EMIT("vmulps      %%ymm2, %%ymm2, %%ymm6") \
            __ASM_EMIT("vmulps      %%ymm3, %%ymm3, %%ymm7") \
            __ASM_EMIT("vhaddps     %%ymm5, %%ymm4, %%ymm4")                /* ymm4 = R = r0*r0+i0*i0 */ \
            __ASM_EMIT("vhaddps     %%ymm7, %%ymm6, %%ymm6") \
            __ASM_EMIT("vmovaps     0x00(%[CC]), %%ymm5")                   /* ymm5 = 1 */ \
            __ASM_EMIT("vdivps      %%ymm4, %%ymm5, %%ymm4")                /* ymm4 = 1/R */ \
            __ASM_EMIT("vdivps      %%ymm6, %%ymm5, %%ymm6") \
            __ASM_EMIT("vxorps      0x20(%[CC]), %%ymm4, %%ymm5")           /* ymm5 = -1/R */ \
            __ASM_EMIT("vunpckhps   %%ymm5, %%ymm4, %%ymm7")                /* ymm7 = 1/R -1/R */ \
            __ASM_EMIT("vunpcklps   %%ymm5, %%ymm4, %%ymm5") \
            __ASM_EMIT("vmulps      %%ymm5, %%ymm0, %%ymm0")                /* ymm0 = r0/R -i0/R */ \
            __ASM_EMIT("vmulps      %%ymm7, %%ymm1, %%ymm1") \
            __ASM_EMIT("vxorps      0x20(%[CC]), %%ymm6, %%ymm5")           /* ymm5 = -1/R2 */ \
            __ASM_EMIT("vunpckhps   %%ymm5, %%ymm6, %%ymm7")                /* ymm7 = 1/R2 -1/R2 */ \
            __ASM_EMIT("vunpcklps   %%ymm5, %%ymm6, %%ymm5") \
            __ASM_EMIT("vmulps      %%ymm5, %%ymm2, %%ymm2")                /* ymm0 = r1/R2 -i1/R2 */ \
            __ASM_EMIT("vmulps      %%ymm7, %%ymm3, %%ymm3") \
            __ASM_EMIT("vmovups     %%ymm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("vmovups     %%ymm1, 0x20(%[" DST "], %[off])") \
            __ASM_EMIT("vmovups     %%ymm2, 0x40(%[" DST "], %[off])") \
            __ASM_EMIT("vmovups     %%ymm3, 0x60(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x80, %[off]") \
            __ASM_EMIT("sub         $16, %[count]") \
            __ASM_EMIT("jae         1b") \
            __ASM_EMIT("2:") \
            /* x8 block */ \
            __ASM_EMIT("add         $8, %[count]") \
            __ASM_EMIT("jl          4f") \
            __ASM_EMIT("vmovups     0x00(%[" SRC "], %[off]), %%ymm0")      /* ymm0 = r0 i0 */ \
            __ASM_EMIT("vmovups     0x20(%[" SRC "], %[off]), %%ymm1") \
            __ASM_EMIT("vmulps      %%ymm0, %%ymm0, %%ymm4")                /* ymm0 = r0*r0 + i0*i0 */ \
            __ASM_EMIT("vmulps      %%ymm1, %%ymm1, %%ymm5") \
            __ASM_EMIT("vhaddps     %%ymm5, %%ymm4, %%ymm4")                /* ymm4 = R = r0*r0+i0*i0 */ \
            __ASM_EMIT("vmovaps     0x00(%[CC]), %%ymm5")                   /* ymm5 = 1 */ \
            __ASM_EMIT("vdivps      %%ymm4, %%ymm5, %%ymm4")                /* ymm4 = 1/R */ \
            __ASM_EMIT("vxorps      0x20(%[CC]), %%ymm4, %%ymm5")           /* ymm5 = -1/R */ \
            __ASM_EMIT("vunpckhps   %%ymm5, %%ymm4, %%ymm7")                /* ymm7 = 1/R -1/R */ \
            __ASM_EMIT("vunpcklps   %%ymm5, %%ymm4, %%ymm5") \
            __ASM_EMIT("vmulps      %%ymm5, %%ymm0, %%ymm0")                /* ymm0 = r0/R -i0/R */ \
            __ASM_EMIT("vmulps      %%ymm7, %%ymm1, %%ymm1") \
            __ASM_EMIT("vmovups     %%ymm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("vmovups     %%ymm1, 0x20(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x40, %[off]") \
            __ASM_EMIT("sub         $8, %[count]") \
            __ASM_EMIT("4:") \
            /* x4 block */ \
            __ASM_EMIT("add         $4, %[count]") \
            __ASM_EMIT("jl          6f") \
            __ASM_EMIT("vmovups     0x00(%[" SRC "], %[off]), %%ymm0")      /* ymm0 = r0 i0 */ \
            __ASM_EMIT("vmulps      %%ymm0, %%ymm0, %%ymm4")                /* ymm0 = r0*r0 + i0*i0 */ \
            __ASM_EMIT("vhaddps     %%ymm4, %%ymm4, %%ymm4")                /* ymm4 = R = r0*r0+i0*i0 */ \
            __ASM_EMIT("vmovaps     0x00(%[CC]), %%ymm5")                   /* ymm5 = 1 */ \
            __ASM_EMIT("vdivps      %%ymm4, %%ymm5, %%ymm4")                /* ymm4 = 1/R */ \
            __ASM_EMIT("vxorps      0x20(%[CC]), %%ymm4, %%ymm5")           /* ymm5 = -1/R */ \
            __ASM_EMIT("vunpcklps   %%ymm5, %%ymm4, %%ymm5")                /* ymm7 = 1/R -1/R */ \
            __ASM_EMIT("vmulps      %%ymm5, %%ymm0, %%ymm0")                /* ymm0 = r0/R -i0/R */ \
            __ASM_EMIT("vmovups     %%ymm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x20, %[off]") \
            __ASM_EMIT("sub         $4, %[count]") \
            __ASM_EMIT("6:") \
            /* x2 block */ \
            __ASM_EMIT("add         $2, %[count]") \
            __ASM_EMIT("jl          8f") \
            __ASM_EMIT("vmovups     0x00(%[" SRC "], %[off]), %%xmm0")      /* xmm0 = r0 i0 */ \
            __ASM_EMIT("vmulps      %%xmm0, %%xmm0, %%xmm4")                /* xmm0 = r0*r0 + i0*i0 */ \
            __ASM_EMIT("vhaddps     %%xmm4, %%xmm4, %%xmm4")                /* xmm4 = R = r0*r0+i0*i0 */ \
            __ASM_EMIT("vmovaps     0x00(%[CC]), %%xmm5")                   /* xmm5 = 1 */ \
            __ASM_EMIT("vdivps      %%xmm4, %%xmm5, %%xmm4")                /* xmm4 = 1/R */ \
            __ASM_EMIT("vxorps      0x20(%[CC]), %%xmm4, %%xmm5")           /* xmm5 = -1/R */ \
            __ASM_EMIT("vunpcklps   %%xmm5, %%xmm4, %%xmm5")                /* xmm7 = 1/R -1/R */ \
            __ASM_EMIT("vmulps      %%xmm5, %%xmm0, %%xmm0")                /* xmm0 = r0/R -i0/R */ \
            __ASM_EMIT("vmovups     %%xmm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("add         $0x10, %[off]") \
            __ASM_EMIT("sub         $2, %[count]") \
            __ASM_EMIT("8:") \
            /* x1 block */ \
            __ASM_EMIT("add         $1, %[count]") \
            __ASM_EMIT("jl          10f") \
            __ASM_EMIT("vmovlps     0x00(%[" SRC "], %[off]), %%xmm0, %%xmm0")  /* xmm0 = r0 i0 */ \
            __ASM_EMIT("vmulps      %%xmm0, %%xmm0, %%xmm4")                /* xmm0 = r0*r0 + i0*i0 */ \
            __ASM_EMIT("vhaddps     %%xmm4, %%xmm4, %%xmm4")                /* xmm4 = R = r0*r0+i0*i0 */ \
            __ASM_EMIT("vmovaps     0x00(%[CC]), %%xmm5")                   /* xmm5 = 1 */ \
            __ASM_EMIT("vdivps      %%xmm4, %%xmm5, %%xmm4")                /* xmm4 = 1/R */ \
            __ASM_EMIT("vxorps      0x20(%[CC]), %%xmm4, %%xmm5")           /* xmm5 = -1/R */ \
            __ASM_EMIT("vunpcklps   %%xmm5, %%xmm4, %%xmm5")                /* xmm7 = 1/R -1/R */ \
            __ASM_EMIT("vmulps      %%xmm5, %%xmm0, %%xmm0")                /* xmm0 = r0/R -i0/R */ \
            __ASM_EMIT("vmovlps     %%xmm0, 0x00(%[" DST "], %[off])") \
            __ASM_EMIT("10:") \
            /* end */

        void pcomplex_rcp1(float *dst, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_RCP_CORE("dst", "dst")
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst),
                  [CC] "r" (pcomplex_div_const)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        void pcomplex_rcp2(float *dst, const float *src, size_t count)
        {
            IF_ARCH_X86(size_t off);
            ARCH_X86_ASM
            (
                PCOMPLEX_RCP_CORE("dst", "src")
                : [off] "=&r" (off),
                  [count] "+r" (count)
                : [dst] "r" (dst), [src] "r" (src),
                  [CC] "r" (pcomplex_div_const)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
                  "%xmm4", "%xmm5", "%xmm6", "%xmm7"
            );
        }

        #undef PCOMPLEX_RCP_CORE

        #undef FMA_OFF
        #undef FMA_ON
    }
}

#endif /* PRIVATE_DSP_ARCH_X86_AVX_PCOMPLEX_H_ */
