x86/vf_noise: move asm code to a separate file

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 144 insertions, 0 deletions

diff --git a/libavfilter/x86/vf_noise.c b/libavfilter/x86/vf_noise.c
new file mode 100644
index 0000000000..0a86cb084b
--- /dev/null
+++ b/libavfilter/x86/vf_noise.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2013 Paul B Mahol
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/x86/cpu.h"
+#include "libavutil/x86/asm.h"
+#include "libavfilter/vf_noise.h"
+
+#if HAVE_INLINE_ASM
+static void line_noise_mmx(uint8_t *dst, const uint8_t *src,
+                           const int8_t *noise, int len, int shift)
+{
+    x86_reg mmx_len= len & (~7);
+    noise += shift;
+
+    __asm__ volatile(
+            "mov %3, %%"REG_a"               \n\t"
+            "pcmpeqb %%mm7, %%mm7            \n\t"
+            "psllw $15, %%mm7                \n\t"
+            "packsswb %%mm7, %%mm7           \n\t"
+            ".p2align 4                      \n\t"
+            "1:                              \n\t"
+            "movq (%0, %%"REG_a"), %%mm0     \n\t"
+            "movq (%1, %%"REG_a"), %%mm1     \n\t"
+            "pxor %%mm7, %%mm0               \n\t"
+            "paddsb %%mm1, %%mm0             \n\t"
+            "pxor %%mm7, %%mm0               \n\t"
+            "movq %%mm0, (%2, %%"REG_a")     \n\t"
+            "add $8, %%"REG_a"               \n\t"
+            " js 1b                          \n\t"
+            :: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
+            : "%"REG_a
+    );
+    if (mmx_len != len)
+        ff_line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
+}
+
+#if HAVE_6REGS
+static void line_noise_avg_mmx(uint8_t *dst, const uint8_t *src,
+                                      int len, const int8_t * const *shift)
+{
+    x86_reg mmx_len = len & (~7);
+
+    __asm__ volatile(
+            "mov %5, %%"REG_a"              \n\t"
+            ".p2align 4                     \n\t"
+            "1:                             \n\t"
+            "movq (%1, %%"REG_a"), %%mm1    \n\t"
+            "movq (%0, %%"REG_a"), %%mm0    \n\t"
+            "paddb (%2, %%"REG_a"), %%mm1   \n\t"
+            "paddb (%3, %%"REG_a"), %%mm1   \n\t"
+            "movq %%mm0, %%mm2              \n\t"
+            "movq %%mm1, %%mm3              \n\t"
+            "punpcklbw %%mm0, %%mm0         \n\t"
+            "punpckhbw %%mm2, %%mm2         \n\t"
+            "punpcklbw %%mm1, %%mm1         \n\t"
+            "punpckhbw %%mm3, %%mm3         \n\t"
+            "pmulhw %%mm0, %%mm1            \n\t"
+            "pmulhw %%mm2, %%mm3            \n\t"
+            "paddw %%mm1, %%mm1             \n\t"
+            "paddw %%mm3, %%mm3             \n\t"
+            "paddw %%mm0, %%mm1             \n\t"
+            "paddw %%mm2, %%mm3             \n\t"
+            "psrlw $8, %%mm1                \n\t"
+            "psrlw $8, %%mm3                \n\t"
+            "packuswb %%mm3, %%mm1          \n\t"
+            "movq %%mm1, (%4, %%"REG_a")    \n\t"
+            "add $8, %%"REG_a"              \n\t"
+            " js 1b                         \n\t"
+            :: "r" (src+mmx_len), "r" (shift[0]+mmx_len), "r" (shift[1]+mmx_len), "r" (shift[2]+mmx_len),
+               "r" (dst+mmx_len), "g" (-mmx_len)
+            : "%"REG_a
+        );
+
+    if (mmx_len != len){
+        const int8_t *shift2[3] = { shift[0]+mmx_len, shift[1]+mmx_len, shift[2]+mmx_len };
+        ff_line_noise_avg_c(dst+mmx_len, src+mmx_len, len-mmx_len, shift2);
+    }
+}
+#endif /* HAVE_6REGS */
+
+static void line_noise_mmxext(uint8_t *dst, const uint8_t *src,
+                              const int8_t *noise, int len, int shift)
+{
+    x86_reg mmx_len = len & (~7);
+    noise += shift;
+
+    __asm__ volatile(
+            "mov %3, %%"REG_a"                \n\t"
+            "pcmpeqb %%mm7, %%mm7             \n\t"
+            "psllw $15, %%mm7                 \n\t"
+            "packsswb %%mm7, %%mm7            \n\t"
+            ".p2align 4                       \n\t"
+            "1:                               \n\t"
+            "movq (%0, %%"REG_a"), %%mm0      \n\t"
+            "movq (%1, %%"REG_a"), %%mm1      \n\t"
+            "pxor %%mm7, %%mm0                \n\t"
+            "paddsb %%mm1, %%mm0              \n\t"
+            "pxor %%mm7, %%mm0                \n\t"
+            "movntq %%mm0, (%2, %%"REG_a")    \n\t"
+            "add $8, %%"REG_a"                \n\t"
+            " js 1b                           \n\t"
+            :: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
+            : "%"REG_a
+            );
+    if (mmx_len != len)
+        ff_line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
+}
+#endif /* HAVE_INLINE_ASM */
+
+av_cold void ff_noise_init_x86(NoiseContext *n)
+{
+#if HAVE_INLINE_ASM
+    int cpu_flags = av_get_cpu_flags();
+
+    if (INLINE_MMX(cpu_flags)) {
+        n->line_noise     = line_noise_mmx;
+#if HAVE_6REGS
+        n->line_noise_avg = line_noise_avg_mmx;
+#endif
+    }
+    if (INLINE_MMXEXT(cpu_flags)) {
+        n->line_noise     = line_noise_mmxext;
+    }
+#endif
+}