25 lines
444 B
ArmAsm
25 lines
444 B
ArmAsm
/*
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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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#include <machine/asm.h>
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#include "abi.h"
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RCSID("$NetBSD: e_acos.S,v 1.7 2001/06/19 00:26:29 fvdl Exp $")
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/* acos = atan (sqrt(1 - x^2) / x) */
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ENTRY(__ieee754_acos)
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XMM_ONE_ARG_DOUBLE_PROLOGUE
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fldl ARG_DOUBLE_ONE /* x */
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fld %st(0)
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fmul %st(0) /* x^2 */
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fld1
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fsubp /* 1 - x^2 */
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fsqrt /* sqrt (1 - x^2) */
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fxch %st(1)
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fpatan
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XMM_DOUBLE_EPILOGUE
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ret
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