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authorVladimir Azarov <avm@intermediate-node.net>2024-10-01 15:47:05 +0200
committerVladimir Azarov <avm@intermediate-node.net>2024-10-01 15:47:05 +0200
commit4abab5ad6c8465a7528ccdd5f49367da05f78bbd (patch)
treeebf009bf1376a5a223a915bc27cbbd791a1316bc /src/math/fmaxf.c
Initial version
Diffstat (limited to 'src/math/fmaxf.c')
-rw-r--r--src/math/fmaxf.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/math/fmaxf.c b/src/math/fmaxf.c
new file mode 100644
index 0000000..695d817
--- /dev/null
+++ b/src/math/fmaxf.c
@@ -0,0 +1,13 @@
+#include <math.h>
+
+float fmaxf(float x, float y)
+{
+ if (isnan(x))
+ return y;
+ if (isnan(y))
+ return x;
+ /* handle signed zeroes, see C99 Annex F.9.9.2 */
+ if (signbit(x) != signbit(y))
+ return signbit(x) ? y : x;
+ return x < y ? y : x;
+}