mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-02-24 01:29:34 +08:00
125e39bfea
This implements a set of vectorized math routines to be used by the compiler auto-vectorizer. Versions for vectors with 2 lanes up to 64 lanes (in powers of 2) are provided. These routines are based on the scalar versions of the math routines in libm/common, libm/math and libm/mathfp. They make extensive use of the GCC C vector extensions and GCN-specific builtins in GCC.
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*
|
|
*/
|
|
|
|
/* Based on newlib/libm/mathfp/e_acosh.c in Newlib. */
|
|
|
|
#include "amdgcnmach.h"
|
|
|
|
v64df v64df_log_aux (v64df, v64di);
|
|
v64df v64df_log1p_aux (v64df, v64di);
|
|
v64df v64df_sqrt_aux (v64df, v64di);
|
|
|
|
DEF_VD_MATH_FUNC (v64df, acosh, v64df x)
|
|
{
|
|
static const double one = 1.0;
|
|
static const double ln2 = 6.93147180559945286227e-01; /* 0x3FE62E42, 0xFEFA39EF */
|
|
|
|
FUNCTION_INIT (v64df);
|
|
|
|
v64si hx, lx;
|
|
EXTRACT_WORDS (hx, lx, x);
|
|
|
|
VECTOR_IF (hx < 0x3ff00000, cond) // x < 1 */
|
|
VECTOR_RETURN ((x-x) / (x-x), cond);
|
|
VECTOR_ENDIF
|
|
VECTOR_IF (hx >=0x41b00000, cond) // x > 2**28 */
|
|
VECTOR_IF2 (hx >=0x7ff00000, cond2, cond) // x is inf of NaN */
|
|
VECTOR_RETURN (x+x, cond2);
|
|
VECTOR_ELSE (cond2)
|
|
/* acosh(huge)=log(2x) */
|
|
VECTOR_RETURN (v64df_log_aux (x, __mask) + ln2, cond2);
|
|
VECTOR_ENDIF
|
|
VECTOR_ENDIF
|
|
VECTOR_IF (((hx - 0x3ff00000) | lx) == 0, cond)
|
|
/* acosh(1) = 0 */
|
|
VECTOR_RETURN (VECTOR_INIT (0.0), cond);
|
|
VECTOR_ENDIF
|
|
VECTOR_IF (hx > 0x40000000, cond) /* 2**28 > x > 2 */
|
|
{
|
|
v64df t = x * x;
|
|
VECTOR_RETURN (v64df_log_aux (2.0*x - one /
|
|
(x + v64df_sqrt_aux (t - one, __mask)),
|
|
__mask),
|
|
cond);
|
|
}
|
|
VECTOR_ELSE (cond) /* 1<x<2 */
|
|
{
|
|
v64df t = x - one;
|
|
VECTOR_RETURN (v64df_log1p_aux (t + v64df_sqrt_aux(2.0*t + t*t, __mask),
|
|
__mask),
|
|
cond);
|
|
}
|
|
VECTOR_ENDIF
|
|
|
|
FUNCTION_RETURN;
|
|
}
|
|
|
|
DEF_VARIANTS (acosh, df, df)
|
|
|