From a0a47a09b0e204216072c1f77643de3f6f869732 Mon Sep 17 00:00:00 2001
From: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Date: Wed, 13 Jan 2016 19:09:25 -0500
Subject: [PATCH] lavu/libm: add isfinite fallback
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
---
configure | 1 +
libavutil/libm.h | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/configure b/configure
index 6d14d37fda2..28ec5bf01e9 100755
--- a/configure
+++ b/configure
@@ -1820,6 +1820,7 @@ MATH_FUNCS="
exp2f
expf
hypot
+ isfinite
isinf
isnan
ldexpf
diff --git a/libavutil/libm.h b/libavutil/libm.h
index bc44dcab0fd..a8199623912 100644
--- a/libavutil/libm.h
+++ b/libavutil/libm.h
@@ -343,6 +343,25 @@ static av_always_inline av_const int avpriv_isnan(double x)
: avpriv_isnan(x))
#endif /* HAVE_ISNAN */
+#if !HAVE_ISFINITE
+static av_always_inline av_const int avpriv_isfinitef(float x)
+{
+ uint32_t v = av_float2int(x);
+ return (v & 0x7f800000) != 0x7f800000;
+}
+
+static av_always_inline av_const int avpriv_isfinite(double x)
+{
+ uint64_t v = av_double2int(x);
+ return (v & 0x7ff0000000000000) != 0x7ff0000000000000;
+}
+
+#define isfinite(x) \
+ (sizeof(x) == sizeof(float) \
+ ? avpriv_isfinitef(x) \
+ : avpriv_isfinite(x))
+#endif /* HAVE_ISFINITE */
+
#if !HAVE_HYPOT
static inline av_const double hypot(double x, double y)
{
--
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