snowdsp_mmx.c

ffmpeg的完整源代码和作者自己写的文档。不但有在Linux的工程哦

        "pavgw %%mm3, %%mm6                          \n\t"
        snow_vertical_compose_r2r_sub("mm7","mm7","mm7","mm7","mm0","mm2","mm4","mm6")
        snow_vertical_compose_sra("1","mm0","mm2","mm4","mm6")
        snow_vertical_compose_mmx_add("%3","mm0","mm2","mm4","mm6")

        snow_vertical_compose_sra("2","mm0","mm2","mm4","mm6")
        snow_vertical_compose_mmx_add("%3","mm0","mm2","mm4","mm6")
        snow_vertical_compose_mmx_store("%3","mm0","mm2","mm4","mm6")
        snow_vertical_compose_mmx_add("%1","mm0","mm2","mm4","mm6")
        snow_vertical_compose_mmx_move("mm0","mm2","mm4","mm6","mm1","mm3","mm5","mm7")
        snow_vertical_compose_sra("1","mm0","mm2","mm4","mm6")
        snow_vertical_compose_r2r_add("mm1","mm3","mm5","mm7","mm0","mm2","mm4","mm6")
        snow_vertical_compose_mmx_add("%2","mm0","mm2","mm4","mm6")
        snow_vertical_compose_mmx_store("%2","mm0","mm2","mm4","mm6")

        "2:                                          \n\t"
        "sub $32, %%"REG_d"                          \n\t"
        "jge 1b                                      \n\t"
        :"+d"(i)
        :"r"(b0),"r"(b1),"r"(b2),"r"(b3),"r"(b4),"r"(b5));
}
#endif //HAVE_7REGS

#define snow_inner_add_yblock_sse2_header \
    IDWTELEM * * dst_array = sb->line + src_y;\
    long tmp;\
    asm volatile(\
             "mov  %7, %%"REG_c"             \n\t"\
             "mov  %6, %2                    \n\t"\
             "mov  %4, %%"REG_S"             \n\t"\
             "pxor %%xmm7, %%xmm7            \n\t" /* 0 */\
             "pcmpeqd %%xmm3, %%xmm3         \n\t"\
             "psllw $15, %%xmm3              \n\t"\
             "psrlw $12, %%xmm3              \n\t" /* FRAC_BITS >> 1 */\
             "1:                             \n\t"\
             "mov %1, %%"REG_D"              \n\t"\
             "mov (%%"REG_D"), %%"REG_D"     \n\t"\
             "add %3, %%"REG_D"              \n\t"

#define snow_inner_add_yblock_sse2_start_8(out_reg1, out_reg2, ptr_offset, s_offset)\
             "mov "PTR_SIZE"*"ptr_offset"(%%"REG_a"), %%"REG_d"; \n\t"\
             "movq (%%"REG_d"), %%"out_reg1" \n\t"\
             "movq (%%"REG_d", %%"REG_c"), %%"out_reg2" \n\t"\
             "punpcklbw %%xmm7, %%"out_reg1" \n\t"\
             "punpcklbw %%xmm7, %%"out_reg2" \n\t"\
             "movq "s_offset"(%%"REG_S"), %%xmm0 \n\t"\
             "movq "s_offset"+16(%%"REG_S"), %%xmm4 \n\t"\
             "punpcklbw %%xmm7, %%xmm0       \n\t"\
             "punpcklbw %%xmm7, %%xmm4       \n\t"\
             "pmullw %%xmm0, %%"out_reg1"    \n\t"\
             "pmullw %%xmm4, %%"out_reg2"    \n\t"

#define snow_inner_add_yblock_sse2_start_16(out_reg1, out_reg2, ptr_offset, s_offset)\
             "mov "PTR_SIZE"*"ptr_offset"(%%"REG_a"), %%"REG_d"; \n\t"\
             "movq (%%"REG_d"), %%"out_reg1" \n\t"\
             "movq 8(%%"REG_d"), %%"out_reg2" \n\t"\
             "punpcklbw %%xmm7, %%"out_reg1" \n\t"\
             "punpcklbw %%xmm7, %%"out_reg2" \n\t"\
             "movq "s_offset"(%%"REG_S"), %%xmm0 \n\t"\
             "movq "s_offset"+8(%%"REG_S"), %%xmm4 \n\t"\
             "punpcklbw %%xmm7, %%xmm0       \n\t"\
             "punpcklbw %%xmm7, %%xmm4       \n\t"\
             "pmullw %%xmm0, %%"out_reg1"    \n\t"\
             "pmullw %%xmm4, %%"out_reg2"    \n\t"

#define snow_inner_add_yblock_sse2_accum_8(ptr_offset, s_offset) \
             snow_inner_add_yblock_sse2_start_8("xmm2", "xmm6", ptr_offset, s_offset)\
             "paddusw %%xmm2, %%xmm1         \n\t"\
             "paddusw %%xmm6, %%xmm5         \n\t"

#define snow_inner_add_yblock_sse2_accum_16(ptr_offset, s_offset) \
             snow_inner_add_yblock_sse2_start_16("xmm2", "xmm6", ptr_offset, s_offset)\
             "paddusw %%xmm2, %%xmm1         \n\t"\
             "paddusw %%xmm6, %%xmm5         \n\t"

#define snow_inner_add_yblock_sse2_end_common1\
             "add $32, %%"REG_S"             \n\t"\
             "add %%"REG_c", %0              \n\t"\
             "add %%"REG_c", "PTR_SIZE"*3(%%"REG_a");\n\t"\
             "add %%"REG_c", "PTR_SIZE"*2(%%"REG_a");\n\t"\
             "add %%"REG_c", "PTR_SIZE"*1(%%"REG_a");\n\t"\
             "add %%"REG_c", (%%"REG_a")     \n\t"

#define snow_inner_add_yblock_sse2_end_common2\
             "jnz 1b                         \n\t"\
             :"+m"(dst8),"+m"(dst_array),"=&r"(tmp)\
             :\
             "rm"((long)(src_x<<1)),"m"(obmc),"a"(block),"m"((long)b_h),"m"((long)src_stride):\
             "%"REG_c"","%"REG_S"","%"REG_D"","%"REG_d"");

#define snow_inner_add_yblock_sse2_end_8\
             "sal $1, %%"REG_c"              \n\t"\
             "add $"PTR_SIZE"*2, %1          \n\t"\
             snow_inner_add_yblock_sse2_end_common1\
             "sar $1, %%"REG_c"              \n\t"\
             "sub $2, %2                     \n\t"\
             snow_inner_add_yblock_sse2_end_common2

#define snow_inner_add_yblock_sse2_end_16\
             "add $"PTR_SIZE"*1, %1          \n\t"\
             snow_inner_add_yblock_sse2_end_common1\
             "dec %2                         \n\t"\
             snow_inner_add_yblock_sse2_end_common2

static void inner_add_yblock_bw_8_obmc_16_bh_even_sse2(const uint8_t *obmc, const long obmc_stride, uint8_t * * block, int b_w, long b_h,
                      int src_x, int src_y, long src_stride, slice_buffer * sb, int add, uint8_t * dst8){
snow_inner_add_yblock_sse2_header
snow_inner_add_yblock_sse2_start_8("xmm1", "xmm5", "3", "0")
snow_inner_add_yblock_sse2_accum_8("2", "8")
snow_inner_add_yblock_sse2_accum_8("1", "128")
snow_inner_add_yblock_sse2_accum_8("0", "136")

             "mov %0, %%"REG_d"              \n\t"
             "movdqa (%%"REG_D"), %%xmm0     \n\t"
             "movdqa %%xmm1, %%xmm2          \n\t"

             "punpckhwd %%xmm7, %%xmm1       \n\t"
             "punpcklwd %%xmm7, %%xmm2       \n\t"
             "paddd %%xmm2, %%xmm0           \n\t"
             "movdqa 16(%%"REG_D"), %%xmm2   \n\t"
             "paddd %%xmm1, %%xmm2           \n\t"
             "paddd %%xmm3, %%xmm0           \n\t"
             "paddd %%xmm3, %%xmm2           \n\t"

             "mov %1, %%"REG_D"              \n\t"
             "mov "PTR_SIZE"(%%"REG_D"), %%"REG_D";\n\t"
             "add %3, %%"REG_D"              \n\t"

             "movdqa (%%"REG_D"), %%xmm4     \n\t"
             "movdqa %%xmm5, %%xmm6          \n\t"
             "punpckhwd %%xmm7, %%xmm5       \n\t"
             "punpcklwd %%xmm7, %%xmm6       \n\t"
             "paddd %%xmm6, %%xmm4           \n\t"
             "movdqa 16(%%"REG_D"), %%xmm6   \n\t"
             "paddd %%xmm5, %%xmm6           \n\t"
             "paddd %%xmm3, %%xmm4           \n\t"
             "paddd %%xmm3, %%xmm6           \n\t"

             "psrad $8, %%xmm0               \n\t" /* FRAC_BITS. */
             "psrad $8, %%xmm2               \n\t" /* FRAC_BITS. */
             "packssdw %%xmm2, %%xmm0        \n\t"
             "packuswb %%xmm7, %%xmm0        \n\t"
             "movq %%xmm0, (%%"REG_d")       \n\t"

             "psrad $8, %%xmm4               \n\t" /* FRAC_BITS. */
             "psrad $8, %%xmm6               \n\t" /* FRAC_BITS. */
             "packssdw %%xmm6, %%xmm4        \n\t"
             "packuswb %%xmm7, %%xmm4        \n\t"
             "movq %%xmm4, (%%"REG_d",%%"REG_c");\n\t"
snow_inner_add_yblock_sse2_end_8
}

static void inner_add_yblock_bw_16_obmc_32_sse2(const uint8_t *obmc, const long obmc_stride, uint8_t * * block, int b_w, long b_h,
                      int src_x, int src_y, long src_stride, slice_buffer * sb, int add, uint8_t * dst8){
snow_inner_add_yblock_sse2_header
snow_inner_add_yblock_sse2_start_16("xmm1", "xmm5", "3", "0")
snow_inner_add_yblock_sse2_accum_16("2", "16")
snow_inner_add_yblock_sse2_accum_16("1", "512")
snow_inner_add_yblock_sse2_accum_16("0", "528")

             "mov %0, %%"REG_d"              \n\t"
             "psrlw $4, %%xmm1               \n\t"
             "psrlw $4, %%xmm5               \n\t"
             "paddw   (%%"REG_D"), %%xmm1    \n\t"
             "paddw 16(%%"REG_D"), %%xmm5    \n\t"
             "paddw %%xmm3, %%xmm1           \n\t"
             "paddw %%xmm3, %%xmm5           \n\t"
             "psraw $4, %%xmm1               \n\t" /* FRAC_BITS. */
             "psraw $4, %%xmm5               \n\t" /* FRAC_BITS. */
             "packuswb %%xmm5, %%xmm1        \n\t"

             "movdqu %%xmm1, (%%"REG_d")       \n\t"

snow_inner_add_yblock_sse2_end_16
}

#define snow_inner_add_yblock_mmx_header \
    IDWTELEM * * dst_array = sb->line + src_y;\
    long tmp;\
    asm volatile(\
             "mov  %7, %%"REG_c"             \n\t"\
             "mov  %6, %2                    \n\t"\
             "mov  %4, %%"REG_S"             \n\t"\
             "pxor %%mm7, %%mm7              \n\t" /* 0 */\
             "pcmpeqd %%mm3, %%mm3           \n\t"\
             "psllw $15, %%mm3               \n\t"\
             "psrlw $12, %%mm3               \n\t" /* FRAC_BITS >> 1 */\
             "1:                             \n\t"\
             "mov %1, %%"REG_D"              \n\t"\
             "mov (%%"REG_D"), %%"REG_D"     \n\t"\
             "add %3, %%"REG_D"              \n\t"

#define snow_inner_add_yblock_mmx_start(out_reg1, out_reg2, ptr_offset, s_offset, d_offset)\
             "mov "PTR_SIZE"*"ptr_offset"(%%"REG_a"), %%"REG_d"; \n\t"\
             "movd "d_offset"(%%"REG_d"), %%"out_reg1" \n\t"\
             "movd "d_offset"+4(%%"REG_d"), %%"out_reg2" \n\t"\
             "punpcklbw %%mm7, %%"out_reg1" \n\t"\
             "punpcklbw %%mm7, %%"out_reg2" \n\t"\
             "movd "s_offset"(%%"REG_S"), %%mm0 \n\t"\
             "movd "s_offset"+4(%%"REG_S"), %%mm4 \n\t"\
             "punpcklbw %%mm7, %%mm0       \n\t"\
             "punpcklbw %%mm7, %%mm4       \n\t"\
             "pmullw %%mm0, %%"out_reg1"    \n\t"\
             "pmullw %%mm4, %%"out_reg2"    \n\t"

#define snow_inner_add_yblock_mmx_accum(ptr_offset, s_offset, d_offset) \
             snow_inner_add_yblock_mmx_start("mm2", "mm6", ptr_offset, s_offset, d_offset)\
             "paddusw %%mm2, %%mm1         \n\t"\
             "paddusw %%mm6, %%mm5         \n\t"

#define snow_inner_add_yblock_mmx_mix(read_offset, write_offset)\
             "mov %0, %%"REG_d"              \n\t"\
             "psrlw $4, %%mm1                \n\t"\
             "psrlw $4, %%mm5                \n\t"\
             "paddw "read_offset"(%%"REG_D"), %%mm1 \n\t"\
             "paddw "read_offset"+8(%%"REG_D"), %%mm5 \n\t"\
             "paddw %%mm3, %%mm1             \n\t"\
             "paddw %%mm3, %%mm5             \n\t"\
             "psraw $4, %%mm1                \n\t"\
             "psraw $4, %%mm5                \n\t"\
             "packuswb %%mm5, %%mm1          \n\t"\
             "movq %%mm1, "write_offset"(%%"REG_d") \n\t"

#define snow_inner_add_yblock_mmx_end(s_step)\
             "add $"s_step", %%"REG_S"             \n\t"\
             "add %%"REG_c", "PTR_SIZE"*3(%%"REG_a");\n\t"\
             "add %%"REG_c", "PTR_SIZE"*2(%%"REG_a");\n\t"\
             "add %%"REG_c", "PTR_SIZE"*1(%%"REG_a");\n\t"\
             "add %%"REG_c", (%%"REG_a")     \n\t"\
             "add $"PTR_SIZE"*1, %1          \n\t"\
             "add %%"REG_c", %0              \n\t"\
             "dec %2                         \n\t"\
             "jnz 1b                         \n\t"\
             :"+m"(dst8),"+m"(dst_array),"=&r"(tmp)\
             :\
             "rm"((long)(src_x<<1)),"m"(obmc),"a"(block),"m"((long)b_h),"m"((long)src_stride):\
             "%"REG_c"","%"REG_S"","%"REG_D"","%"REG_d"");

static void inner_add_yblock_bw_8_obmc_16_mmx(const uint8_t *obmc, const long obmc_stride, uint8_t * * block, int b_w, long b_h,
                      int src_x, int src_y, long src_stride, slice_buffer * sb, int add, uint8_t * dst8){
snow_inner_add_yblock_mmx_header
snow_inner_add_yblock_mmx_start("mm1", "mm5", "3", "0", "0")
snow_inner_add_yblock_mmx_accum("2", "8", "0")
snow_inner_add_yblock_mmx_accum("1", "128", "0")
snow_inner_add_yblock_mmx_accum("0", "136", "0")
snow_inner_add_yblock_mmx_mix("0", "0")
snow_inner_add_yblock_mmx_end("16")
}

static void inner_add_yblock_bw_16_obmc_32_mmx(const uint8_t *obmc, const long obmc_stride, uint8_t * * block, int b_w, long b_h,
                      int src_x, int src_y, long src_stride, slice_buffer * sb, int add, uint8_t * dst8){
snow_inner_add_yblock_mmx_header
snow_inner_add_yblock_mmx_start("mm1", "mm5", "3", "0", "0")
snow_inner_add_yblock_mmx_accum("2", "16", "0")
snow_inner_add_yblock_mmx_accum("1", "512", "0")
snow_inner_add_yblock_mmx_accum("0", "528", "0")
snow_inner_add_yblock_mmx_mix("0", "0")

snow_inner_add_yblock_mmx_start("mm1", "mm5", "3", "8", "8")
snow_inner_add_yblock_mmx_accum("2", "24", "8")
snow_inner_add_yblock_mmx_accum("1", "520", "8")
snow_inner_add_yblock_mmx_accum("0", "536", "8")
snow_inner_add_yblock_mmx_mix("16", "8")
snow_inner_add_yblock_mmx_end("32")
}

void ff_snow_inner_add_yblock_sse2(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
                           int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){

    if (b_w == 16)
        inner_add_yblock_bw_16_obmc_32_sse2(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
    else if (b_w == 8 && obmc_stride == 16) {
        if (!(b_h & 1))
            inner_add_yblock_bw_8_obmc_16_bh_even_sse2(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
        else
            inner_add_yblock_bw_8_obmc_16_mmx(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
    } else
         ff_snow_inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
}

void ff_snow_inner_add_yblock_mmx(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
                          int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
    if (b_w == 16)
        inner_add_yblock_bw_16_obmc_32_mmx(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
    else if (b_w == 8 && obmc_stride == 16)
        inner_add_yblock_bw_8_obmc_16_mmx(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
    else
        ff_snow_inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
}