Math code for rt linux boxes.

git-svn-id: https://redoubt.ligo-wa.caltech.edu/svn/advLigoRTS/trunk@281 6dcd42c9-f523-4c6d-aada-af552506706e

src/include/inlineMath.h

+inline void sincos(double __x, double *__sinx, double *__cosx)
+{
+  register long double __cosr;
+  register long double __sinr;
+  __asm __volatile__
+    ("fsincos\n\t"
+     "fnstsw    %%ax\n\t"
+     "testl     $0x400, %%eax\n\t"
+     "jz        1f\n\t"
+     "fldpi\n\t"
+     "fadd      %%st(0)\n\t"
+     "fxch      %%st(1)\n\t"
+     "2: fprem1\n\t"
+     "fnstsw    %%ax\n\t"
+     "testl     $0x400, %%eax\n\t"
+     "jnz       2b\n\t"
+     "fstp      %%st(1)\n\t"
+     "fsincos\n\t"
+     "1:"
+     : "=t" (__cosr), "=u" (__sinr) : "0" (__x));
+  *__sinx = __sinr;
+  *__cosx = __cosr;
+
+}
+
+/* Fast Pentium FPU SQRT command */
+inline double lsqrt (double __x) { register double __result; __asm __volatile__ ("fsqrt" : "=t" (__result) : "0" (__x)); return __result; }
+