x86: Add convenience macros to check for CPU extensions and flags

libavutil/x86/cpu.h

+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_X86_CPU_H
+#define AVUTIL_X86_CPU_H
+
+#include "config.h"
+#include "libavutil/cpu.h"
+
+#define CPUEXT(flags, suffix, cpuext)                                   \
+    (HAVE_ ## cpuext ## suffix && ((flags) & AV_CPU_FLAG_ ## cpuext))
+
+#define AV_CPU_FLAG_AMD3DNOW    AV_CPU_FLAG_3DNOW
+#define AV_CPU_FLAG_AMD3DNOWEXT AV_CPU_FLAG_3DNOWEXT
+
+#define EXTERNAL_AMD3DNOW(flags)    CPUEXT(flags, _EXTERNAL, AMD3DNOW)
+#define EXTERNAL_AMD3DNOWEXT(flags) CPUEXT(flags, _EXTERNAL, AMD3DNOWEXT)
+#define EXTERNAL_MMX(flags)         CPUEXT(flags, _EXTERNAL, MMX)
+#define EXTERNAL_MMXEXT(flags)      CPUEXT(flags, _EXTERNAL, MMXEXT)
+#define EXTERNAL_SSE(flags)         CPUEXT(flags, _EXTERNAL, SSE)
+#define EXTERNAL_SSE2(flags)        CPUEXT(flags, _EXTERNAL, SSE2)
+#define EXTERNAL_SSE3(flags)        CPUEXT(flags, _EXTERNAL, SSE3)
+#define EXTERNAL_SSSE3(flags)       CPUEXT(flags, _EXTERNAL, SSSE3)
+#define EXTERNAL_SSE4(flags)        CPUEXT(flags, _EXTERNAL, SSE4)
+#define EXTERNAL_SSE42(flags)       CPUEXT(flags, _EXTERNAL, SSE42)
+#define EXTERNAL_AVX(flags)         CPUEXT(flags, _EXTERNAL, AVX)
+#define EXTERNAL_FMA4(flags)        CPUEXT(flags, _EXTERNAL, FMA4)
+
+#define INLINE_AMD3DNOW(flags)      CPUEXT(flags, _INLINE, AMD3DNOW)
+#define INLINE_AMD3DNOWEXT(flags)   CPUEXT(flags, _INLINE, AMD3DNOWEXT)
+#define INLINE_MMX(flags)           CPUEXT(flags, _INLINE, MMX)
+#define INLINE_MMXEXT(flags)        CPUEXT(flags, _INLINE, MMXEXT)
+#define INLINE_SSE(flags)           CPUEXT(flags, _INLINE, SSE)
+#define INLINE_SSE2(flags)          CPUEXT(flags, _INLINE, SSE2)
+#define INLINE_SSE3(flags)          CPUEXT(flags, _INLINE, SSE3)
+#define INLINE_SSSE3(flags)         CPUEXT(flags, _INLINE, SSSE3)
+#define INLINE_SSE4(flags)          CPUEXT(flags, _INLINE, SSE4)
+#define INLINE_SSE42(flags)         CPUEXT(flags, _INLINE, SSE42)
+#define INLINE_AVX(flags)           CPUEXT(flags, _INLINE, AVX)
+#define INLINE_FMA4(flags)          CPUEXT(flags, _INLINE, FMA4)
+
+#endif /* AVUTIL_X86_CPU_H */