/*
 * 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_SSE_GRAPHICS_H_
#define PRIVATE_DSP_ARCH_X86_SSE_GRAPHICS_H_

#ifndef PRIVATE_DSP_ARCH_X86_SSE_IMPL
    #error "This header should not be included directly"
#endif /* PRIVATE_DSP_ARCH_X86_SSE_IMPL */

namespace lsp
{
    namespace sse
    {
    #define FILL4_CORE \
        __ASM_EMIT("movss       %[c0], %%xmm0")     /* xmm0 = c0 */ \
        __ASM_EMIT("movss       %[c1], %%xmm1")     /* xmm1 = c1 */ \
        __ASM_EMIT("movss       %[c2], %%xmm2")     /* xmm2 = c2 */ \
        __ASM_EMIT("movss       %[c3], %%xmm3")     /* xmm3 = c3 */ \
        __ASM_EMIT("unpcklps    %%xmm1, %%xmm0")    /* xmm0 = c0 c1 ? ? */ \
        __ASM_EMIT("unpcklps    %%xmm3, %%xmm2")    /* xmm2 = c2 c3 ? ? */ \
        __ASM_EMIT("movlhps     %%xmm2, %%xmm0")    /* xmm0 = c0 c1 c2 c3 */ \
        __ASM_EMIT("movaps      %%xmm0, %%xmm1")    /* xmm1 = c0 c1 c2 c3 */ \
        __ASM_EMIT("movaps      %%xmm0, %%xmm2") \
        __ASM_EMIT("movaps      %%xmm1, %%xmm3") \
        \
        /* 8x blocks */ \
        __ASM_EMIT("sub         $8, %[count]") \
        __ASM_EMIT("jb          2f") \
        __ASM_EMIT("1:") \
        __ASM_EMIT("movups      %%xmm0, 0x00(%[dst])") \
        __ASM_EMIT("movups      %%xmm1, 0x10(%[dst])") \
        __ASM_EMIT("movups      %%xmm2, 0x20(%[dst])") \
        __ASM_EMIT("movups      %%xmm3, 0x30(%[dst])") \
        __ASM_EMIT("movups      %%xmm0, 0x40(%[dst])") \
        __ASM_EMIT("movups      %%xmm1, 0x50(%[dst])") \
        __ASM_EMIT("movups      %%xmm2, 0x60(%[dst])") \
        __ASM_EMIT("movups      %%xmm3, 0x70(%[dst])") \
        __ASM_EMIT("add         $0x80, %[dst]") \
        __ASM_EMIT("sub         $8, %[count]") \
        __ASM_EMIT("jae         1b") \
        /* 4x block */ \
        __ASM_EMIT("2:") \
        __ASM_EMIT("add         $4, %[count]") \
        __ASM_EMIT("jl          4f") \
        __ASM_EMIT("movups      %%xmm0, 0x00(%[dst])") \
        __ASM_EMIT("movups      %%xmm1, 0x10(%[dst])") \
        __ASM_EMIT("movups      %%xmm2, 0x20(%[dst])") \
        __ASM_EMIT("movups      %%xmm3, 0x30(%[dst])") \
        __ASM_EMIT("sub         $4, %[count]") \
        __ASM_EMIT("add         $0x40, %[dst]") \
        /* 2x block */ \
        __ASM_EMIT("4:") \
        __ASM_EMIT("add         $2, %[count]") \
        __ASM_EMIT("jl          6f") \
        __ASM_EMIT("movups      %%xmm0, 0x00(%[dst])") \
        __ASM_EMIT("movups      %%xmm1, 0x10(%[dst])") \
        __ASM_EMIT("sub         $2, %[count]") \
        __ASM_EMIT("add         $0x20, %[dst]") \
        /* 1x block */ \
        __ASM_EMIT("6:") \
        __ASM_EMIT("add         $1, %[count]") \
        __ASM_EMIT("jl          8f") \
        __ASM_EMIT("movups      %%xmm0, 0x00(%[dst])") \
        __ASM_EMIT("8:")

        void fill_rgba(float *dst, float r, float g, float b, float a, size_t count)
        {
            ARCH_X86_ASM
            (
                FILL4_CORE
                : [dst] "+r" (dst), [count] "+r" (count)
                : [c0] "m" (r), [c1] "m" (g), [c2] "m" (b), [c3] "m" (a)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3"
            );
        }

        void fill_hsla(float *dst, float h, float s, float l, float a, size_t count)
        {
            ARCH_X86_ASM
            (
                FILL4_CORE
                : [dst] "+r" (dst), [count] "+r" (count)
                : [c0] "m" (h), [c1] "m" (s), [c2] "m" (l), [c3] "m" (a)
                : "cc", "memory",
                  "%xmm0", "%xmm1", "%xmm2", "%xmm3"
            );
        }

    #undef FILL4_CORE
    }
}

#endif /* PRIVATE_DSP_ARCH_X86_SSE_GRAPHICS_H_ */
