Rename ffmpeg-4.2-fit to ffmpeg-4-fit

trunk/3rdparty/ffmpeg-4-fit/libavutil/x86/intmath.h

@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2015 James Almer
+ *
+ * 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
+ */
+
+#ifndef AVUTIL_X86_INTMATH_H
+#define AVUTIL_X86_INTMATH_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#if HAVE_FAST_CLZ
+#if defined(_MSC_VER)
+#include <intrin.h>
+#elif defined(__INTEL_COMPILER)
+#include <immintrin.h>
+#endif
+#endif
+#include "config.h"
+
+#if HAVE_FAST_CLZ
+#if (defined(__INTEL_COMPILER) && (__INTEL_COMPILER>=1216)) || defined(_MSC_VER)
+#   if defined(__INTEL_COMPILER)
+#       define ff_log2(x) (_bit_scan_reverse((x)|1))
+#   else
+#       define ff_log2 ff_log2_x86
+static av_always_inline av_const int ff_log2_x86(unsigned int v)
+{
+    unsigned long n;
+    _BitScanReverse(&n, v|1);
+    return n;
+}
+#   endif
+#   define ff_log2_16bit av_log2
+
+#if defined(__INTEL_COMPILER) || (defined(_MSC_VER) && (_MSC_VER >= 1700) && \
+                                  (defined(__BMI__) || !defined(__clang__)))
+#   define ff_ctz(v) _tzcnt_u32(v)
+
+#   if ARCH_X86_64
+#       define ff_ctzll(v) _tzcnt_u64(v)
+#   else
+#       define ff_ctzll ff_ctzll_x86
+static av_always_inline av_const int ff_ctzll_x86(long long v)
+{
+    return ((uint32_t)v == 0) ? _tzcnt_u32((uint32_t)(v >> 32)) + 32 : _tzcnt_u32((uint32_t)v);
+}
+#   endif
+#endif /* _MSC_VER */
+
+#endif /* __INTEL_COMPILER */
+
+#endif /* HAVE_FAST_CLZ */
+
+#if defined(__GNUC__)
+
+/* Our generic version of av_popcount is faster than GCC's built-in on
+ * CPUs that don't support the popcnt instruction.
+ */
+#if defined(__POPCNT__)
+    #define av_popcount   __builtin_popcount
+#if ARCH_X86_64
+    #define av_popcount64 __builtin_popcountll
+#endif
+
+#endif /* __POPCNT__ */
+
+#if defined(__BMI2__)
+
+#if AV_GCC_VERSION_AT_LEAST(5,1)
+#define av_mod_uintp2 __builtin_ia32_bzhi_si
+#elif HAVE_INLINE_ASM
+/* GCC releases before 5.1.0 have a broken bzhi builtin, so for those we
+ * implement it using inline assembly
+ */
+#define av_mod_uintp2 av_mod_uintp2_bmi2
+static av_always_inline av_const unsigned av_mod_uintp2_bmi2(unsigned a, unsigned p)
+{
+    if (av_builtin_constant_p(p))
+        return a & ((1 << p) - 1);
+    else {
+        unsigned x;
+        __asm__ ("bzhi %2, %1, %0 \n\t" : "=r"(x) : "rm"(a), "r"(p));
+        return x;
+    }
+}
+#endif /* AV_GCC_VERSION_AT_LEAST */
+
+#endif /* __BMI2__ */
+
+#if defined(__SSE2__) && !defined(__INTEL_COMPILER)
+
+#define av_clipd av_clipd_sse2
+static av_always_inline av_const double av_clipd_sse2(double a, double amin, double amax)
+{
+#if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    __asm__ ("minsd %2, %0 \n\t"
+             "maxsd %1, %0 \n\t"
+             : "+&x"(a) : "xm"(amin), "xm"(amax));
+    return a;
+}
+
+#endif /* __SSE2__ */
+
+#if defined(__SSE__) && !defined(__INTEL_COMPILER)
+
+#define av_clipf av_clipf_sse
+static av_always_inline av_const float av_clipf_sse(float a, float amin, float amax)
+{
+#if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    __asm__ ("minss %2, %0 \n\t"
+             "maxss %1, %0 \n\t"
+             : "+&x"(a) : "xm"(amin), "xm"(amax));
+    return a;
+}
+
+#endif /* __SSE__ */
+
+#endif /* __GNUC__ */
+
+#endif /* AVUTIL_X86_INTMATH_H */