[libc-commits] [libc] Add sinf16 function (PR #116674)

[via libc-commits]

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@@ -46,10 +47,17 @@ LIBC_INLINE int32_t range_reduction_sincospif16(float x, float &y) {
   return static_cast<int32_t>(kf);
 }
 
-LIBC_INLINE void sincospif16_eval(float xf, float &sin_k, float &cos_k,
-                                  float &sin_y, float &cosm1_y) {
-  float y;
-  int32_t k = range_reduction_sincospif16(xf, y);
+LIBC_INLINE int32_t range_reduction_sincosf16(float x, float &y) {
+  double prod = x * 0x1.45f306dc9c883p3;
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overmighty wrote:

Could you add comments to explain this?

https://github.com/llvm/llvm-project/pull/116674