1 /*
2 * SIMD-optimized HuffYUV encoding functions
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * MMX optimization by Nick Kurshev <nickols_k@mail.ru>
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/x86/asm.h"
28 #include "libavutil/x86/cpu.h"
29 #include "libavcodec/huffyuvencdsp.h"
30 #include "libavcodec/mathops.h"
31
32 #if HAVE_INLINE_ASM
33
diff_bytes_mmx(uint8_t * dst,const uint8_t * src1,const uint8_t * src2,int w)34 static void diff_bytes_mmx(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, int w)
35 {
36 x86_reg i = 0;
37
38 if (w >= 16)
39 __asm__ volatile (
40 "1: \n\t"
41 "movq (%2, %0), %%mm0 \n\t"
42 "movq (%1, %0), %%mm1 \n\t"
43 "psubb %%mm0, %%mm1 \n\t"
44 "movq %%mm1, (%3, %0) \n\t"
45 "movq 8(%2, %0), %%mm0 \n\t"
46 "movq 8(%1, %0), %%mm1 \n\t"
47 "psubb %%mm0, %%mm1 \n\t"
48 "movq %%mm1, 8(%3, %0) \n\t"
49 "add $16, %0 \n\t"
50 "cmp %4, %0 \n\t"
51 " jb 1b \n\t"
52 : "+r" (i)
53 : "r" (src1), "r" (src2), "r" (dst), "r" ((x86_reg) w - 15));
54
55 for (; i < w; i++)
56 dst[i + 0] = src1[i + 0] - src2[i + 0];
57 }
58
sub_hfyu_median_pred_mmxext(uint8_t * dst,const uint8_t * src1,const uint8_t * src2,int w,int * left,int * left_top)59 static void sub_hfyu_median_pred_mmxext(uint8_t *dst, const uint8_t *src1,
60 const uint8_t *src2, int w,
61 int *left, int *left_top)
62 {
63 x86_reg i = 0;
64 uint8_t l, lt;
65
66 __asm__ volatile (
67 "movq (%1, %0), %%mm0 \n\t" // LT
68 "psllq $8, %%mm0 \n\t"
69 "1: \n\t"
70 "movq (%1, %0), %%mm1 \n\t" // T
71 "movq -1(%2, %0), %%mm2 \n\t" // L
72 "movq (%2, %0), %%mm3 \n\t" // X
73 "movq %%mm2, %%mm4 \n\t" // L
74 "psubb %%mm0, %%mm2 \n\t"
75 "paddb %%mm1, %%mm2 \n\t" // L + T - LT
76 "movq %%mm4, %%mm5 \n\t" // L
77 "pmaxub %%mm1, %%mm4 \n\t" // max(T, L)
78 "pminub %%mm5, %%mm1 \n\t" // min(T, L)
79 "pminub %%mm2, %%mm4 \n\t"
80 "pmaxub %%mm1, %%mm4 \n\t"
81 "psubb %%mm4, %%mm3 \n\t" // dst - pred
82 "movq %%mm3, (%3, %0) \n\t"
83 "add $8, %0 \n\t"
84 "movq -1(%1, %0), %%mm0 \n\t" // LT
85 "cmp %4, %0 \n\t"
86 " jb 1b \n\t"
87 : "+r" (i)
88 : "r" (src1), "r" (src2), "r" (dst), "r" ((x86_reg) w));
89
90 l = *left;
91 lt = *left_top;
92
93 dst[0] = src2[0] - mid_pred(l, src1[0], (l + src1[0] - lt) & 0xFF);
94
95 *left_top = src1[w - 1];
96 *left = src2[w - 1];
97 }
98
99 #endif /* HAVE_INLINE_ASM */
100
ff_huffyuvencdsp_init_x86(HuffYUVEncDSPContext * c)101 av_cold void ff_huffyuvencdsp_init_x86(HuffYUVEncDSPContext *c)
102 {
103 #if HAVE_INLINE_ASM
104 int cpu_flags = av_get_cpu_flags();
105
106 if (INLINE_MMX(cpu_flags)) {
107 c->diff_bytes = diff_bytes_mmx;
108 }
109
110 if (INLINE_MMXEXT(cpu_flags)) {
111 c->sub_hfyu_median_pred = sub_hfyu_median_pred_mmxext;
112 }
113 #endif /* HAVE_INLINE_ASM */
114 }
115