================
@@ -0,0 +1,38 @@
+#include <clc/clcmacro.h>
+#include <clc/internal/clc.h>
+#include <clc/relational/clc_isnan.h>
+
+#define CLC_SIGN(TYPE, F)
\
+ _CLC_DEF _CLC_OVERLOAD TYPE __clc_sign(TYPE x) {
\
+ if (__clc_isnan(x)) {
\
+ return 0.0F;
\
+ }
\
+ if (x > 0.0F) {
\
+ return 1.0F;
\
+ }
\
+ if (x < 0.0F) {
\
+ return -1.0F;
\
+ }
\
+ return x; /* -0.0 or +0.0 */
\
----------------
frasercrmck wrote:
True, my mistake. Forgetting the NaNs, though, my first sentence holds:
`copysign(0.0, x < 0.0)` doesn't return `1.0` if `x > 0` nor `-1.0` if `x < 0`
as OpenCL's `sign` is required to. I'm assuming you're saying `float sign(float
x) { return copysign(0.0, x < 0); }` is a correct implementation of `sign`.
https://github.com/llvm/llvm-project/pull/115699
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