ppc: Add and use convenience macro to check for AltiVec availability

2 files changed, 30 insertions, 3 deletions

diff --git a/libavutil/ppc/cpu.h b/libavutil/ppc/cpu.h
new file mode 100644
index 0000000..f8fae58
--- /dev/null
+++ b/libavutil/ppc/cpu.h
@@ -0,0 +1,28 @@
+/*
+ * 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_PPC_CPU_H
+#define AVUTIL_PPC_CPU_H
+
+#include "config.h"
+#include "libavutil/cpu.h"
+#include "libavutil/cpu_internal.h"
+
+#define PPC_ALTIVEC(flags) CPUEXT(flags, ALTIVEC)
+
+#endif /* AVUTIL_PPC_CPU_H */
diff --git a/libavutil/ppc/float_dsp_init.c b/libavutil/ppc/float_dsp_init.c
index c89aa7f..60d0f19 100644
--- a/libavutil/ppc/float_dsp_init.c
+++ b/libavutil/ppc/float_dsp_init.c
@@ -22,12 +22,12 @@
 #include "libavutil/attributes.h"
 #include "libavutil/cpu.h"
 #include "libavutil/float_dsp.h"
+#include "libavutil/ppc/cpu.h"
 #include "float_dsp_altivec.h"
 
 av_cold void ff_float_dsp_init_ppc(AVFloatDSPContext *fdsp, int bit_exact)
 {
-#if HAVE_ALTIVEC
-    if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
+    if (!PPC_ALTIVEC(av_get_cpu_flags()))
         return;
 
     fdsp->vector_fmul = ff_vector_fmul_altivec;
@@ -37,5 +37,4 @@ av_cold void ff_float_dsp_init_ppc(AVFloatDSPContext *fdsp, int bit_exact)
     if (!bit_exact) {
         fdsp->vector_fmul_window = ff_vector_fmul_window_altivec;
     }
-#endif
 }