23 lines
572 B
C
23 lines
572 B
C
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/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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long double acosl (long double x);
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long double acosl (long double x)
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{
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long double res = 0.0L;
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/* acosl = atanl (sqrtl(1 - x^2) / x) */
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asm ( "fld %%st\n\t"
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"fmul %%st(0)\n\t" /* x^2 */
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"fld1\n\t"
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"fsubp\n\t" /* 1 - x^2 */
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"fsqrt\n\t" /* sqrtl (1 - x^2) */
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"fxch %%st(1)\n\t"
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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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