[libc-commits] [libc] [libc][math][c23] Add cospif16 function (PR #113001)

[via libc-commits]

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@@ -255,19 +255,13 @@ class MPFRNumber {
     mpfr_cospi(result.value, value, mpfr_rounding);
     return result;
 #else
-    MPFRNumber value_frac(*this);
-    mpfr_frac(value_frac.value, value, MPFR_RNDN);
-
-    if (mpfr_cmp_si(value_frac.value, 0.0) == 0) {
-      mpz_t integer_part;
-      mpz_init(integer_part);
-      mpfr_get_z(integer_part, value, MPFR_RNDN);
-
-      if (mpz_tstbit(integer_part, 0)) {
-        mpfr_set_si(result.value, -1.0, MPFR_RNDN); // odd
-      } else {
-        mpfr_set_si(result.value, 1.0, MPFR_RNDN); // even
-      }
+    if (mpfr_integer_p(value)) {
+      mpz_t integer;
+      mpz_init(integer);
+      mpfr_get_z(integer, value, mpfr_rounding);
+
+      auto d = mpz_tstbit(integer, 0);
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overmighty wrote:

`mpz_tstbit` returns an `int` as far as I can tell. Should probably just use `int` directly instead of `auto`.

https://github.com/llvm/llvm-project/pull/113001