b3b380428d
2001-05-06 Andreas Jaeger <aj@suse.de> * sysdeps/i386/fpu/e_acosl.c: New, rewrite of e_acos.S. * sysdeps/i386/fpu/s_atanl.c: New, rewrite of e_atanl.S. * sysdeps/i386/fpu/e_sqrtl.c: New, rewrite of e_sqrt.S. * sysdeps/i386/fpu/e_acosl.S: Removed. * sysdeps/i386/fpu/s_atanl.S: Removed. * sysdeps/i386/fpu/e_sqrtl.S: Removed.
26 lines
481 B
C
26 lines
481 B
C
/*
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* Written by J.T. Conklin <jtc@netbsd.org>.
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* Public domain.
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*
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* Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>.
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*/
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#include <math_private.h>
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long double
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__ieee754_acosl (long double x)
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{
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long double res;
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/* acosl = atanl (sqrtl(1 - x^2) / x) */
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asm ( "fld %%st\n"
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"fmul %%st(0)\n" /* x^2 */
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"fld1\n"
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"fsubp\n" /* 1 - x^2 */
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"fsqrt\n" /* sqrtl (1 - x^2) */
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"fxch %%st(1)\n"
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"fpatan"
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: "=t" (res) : "0" (x) : "st(1)");
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return res;
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}
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