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-rw-r--r--src/math/sincosl.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/math/sincosl.c b/src/math/sincosl.c
new file mode 100644
index 00000000..378dc979
--- /dev/null
+++ b/src/math/sincosl.c
@@ -0,0 +1,66 @@
+#include "libm.h"
+
+#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
+void sincosl(long double x, long double *sin, long double *cos)
+{
+ double s, c;
+ sincos(x, &s, &c);
+ *sin = s;
+ *cos = c;
+}
+#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
+#include "__rem_pio2l.h"
+
+void sincosl(long double x, long double *sin, long double *cos)
+{
+ union IEEEl2bits u;
+ int n;
+ long double y[2], s, c;
+
+ u.e = x;
+ u.bits.sign = 0;
+
+ /* x = +-0 or subnormal */
+ if (!u.bits.exp) {
+ *sin = x;
+ *cos = 1.0;
+ return;
+ }
+
+ /* x = nan or inf */
+ if (u.bits.exp == 0x7fff) {
+ *sin = *cos = x - x;
+ return;
+ }
+
+ /* |x| < pi/4 */
+ if (u.e < M_PI_4) {
+ *sin = __sinl(x, 0, 0);
+ *cos = __cosl(x, 0);
+ return;
+ }
+
+ n = __rem_pio2l(x, y);
+ s = __sinl(y[0], y[1], 1);
+ c = __cosl(y[0], y[1]);
+ switch (n & 3) {
+ case 0:
+ *sin = s;
+ *cos = c;
+ break;
+ case 1:
+ *sin = c;
+ *cos = -s;
+ break;
+ case 2:
+ *sin = -s;
+ *cos = -c;
+ break;
+ case 3:
+ default:
+ *sin = -c;
+ *cos = s;
+ break;
+ }
+}
+#endif