Add floorf() function to include/math.h

maximecb · Sep 30, 2023 · a936512 · a936512
1 parent c96bac5
commit a936512
Show file tree

Hide file tree

Showing 2 changed files with 13 additions and 0 deletions.
diff --git a/ncc/include/math.h b/ncc/include/math.h
@@ -12,4 +12,14 @@
 #define atanf(__f) (asm (__f) -> float { atans_f32; })
 #define sqrtf(__f) (asm (__f) -> float { sqrt_f32; })
 
+float floorf(float x)
+{
+    float xi = (float)(int)x;
+
+    if (x < xi)
+        return xi - 1.0f;
+
+    return xi;
+}
+
 #endif
diff --git a/ncc/tests/floats.c b/ncc/tests/floats.c
@@ -38,5 +38,8 @@ int main()
     assert(sqrtf(4.0f) == 2.0f);
     assert(sinf(0.0f) == 0.0f);
 
+    assert(floorf(4.5f) == 4.0f);
+    assert(floorf(-4.5f) == -5.0f);
+
     return 0;
 }