rsys

commit 7c3c83776663d81473f02c40d3ff82aec53dbe15
parent 50852b9b06ec83a17ec6f8c14b1934dd646c3100
Author: vaplv <vaplv@free.fr>
Date:   Sun,  8 Jun 2014 19:20:05 +0200

Add and test the signf function

Diffstat:
M
src/math.h
 | 
6
++++++
M
src/test_math.c
 | 
10
++++++++++

2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/src/math.h b/src/math.h
@@ -47,6 +47,12 @@ absf(const float flt)
   return ucast.f;
 }
 
+static FINLINE float
+signf(const float flt)
+{
+  return flt < 0.f ? -1.f : 1.f;
+}
+
 static FINLINE char
 eq_eps(const float a, const float b, const float eps)
 {
diff --git a/src/test_math.c b/src/test_math.c
@@ -44,6 +44,7 @@ main(int argc, char** argv)
   CHECK(IS_POW2(31), 0);
   CHECK(IS_POW2(64), 1);
   CHECK(IS_POW2(1 << 16), 1);
+
   CHECK(log2i(3), 1);
   CHECK(log2i(4), 2);
   CHECK(log2i(5), 2);
@@ -52,9 +53,18 @@ main(int argc, char** argv)
   CHECK(log2i(12), 3);
   CHECK(log2i(511), 8);
   CHECK(log2i(512), 9);
+
   CHECK(round_up_pow2(0), 1);
   CHECK(round_up_pow2(3), 4);
   CHECK(round_up_pow2(4), 4);
   CHECK(round_up_pow2(100), 128);
+
+  CHECK(absf(-1.f), 1.f);
+  CHECK(absf(10.f), 10.f);
+  CHECK(absf(-3.14159f), 3.14159f);
+
+  CHECK(signf(-3.14159f), -1.f);
+  CHECK(signf(1.23f), 1.f);
+  CHECK(signf(0.f), 1.f);
   return 0;
 }