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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.
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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/* Based on newlib/libm/common/sf_modf.c in Newlib. */
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#include "amdgcnmach.h"
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v64si v64sf_numtestf (v64sf);
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DEF_VS_MATH_FUNC (v64sf, modff, v64sf x, v64sf *iptr)
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{
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FUNCTION_INIT (v64sf);
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v64sf ret_i;
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v64si i0;
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GET_FLOAT_WORD (i0, x, NO_COND);
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v64si j0 = ((i0 >> 23) & 0xff) - 0x7f; /* exponent of x */
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v64sf zero;
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SET_FLOAT_WORD (zero, i0 & 0x80000000,NO_COND);
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VECTOR_IF (j0 < 23, cond) /* integer part in x*/
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VECTOR_IF2 (j0 < 0, cond2, cond) /* |x|<1 */
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VECTOR_COND_MOVE (ret_i, zero, cond2);
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VECTOR_RETURN (x, cond2);
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VECTOR_ELSE2 (cond2, cond)
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v64si i = (0x007fffff) >> j0;
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VECTOR_IF2 ((i0 & i) == 0, cond3, cond2) /* x is integral */
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VECTOR_COND_MOVE (ret_i, x, cond3);
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VECTOR_RETURN (zero, cond3);
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VECTOR_ELSE2 (cond3, cond2)
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SET_FLOAT_WORD (ret_i, i0 & ~i, cond3);
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VECTOR_RETURN (x - ret_i, cond3);
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VECTOR_ENDIF
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VECTOR_ENDIF
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VECTOR_ELSE (cond) /* no fraction part */
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VECTOR_COND_MOVE (ret_i, x, cond);
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VECTOR_IF2 (v64sf_numtestf (x) == NAN, cond2, cond)
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VECTOR_COND_MOVE (ret_i, x + x, cond2);
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VECTOR_RETURN (ret_i, cond2); /* x is NaN, return NaN */
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VECTOR_ENDIF
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VECTOR_RETURN (zero, cond); /* return +- 0 */
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VECTOR_ENDIF
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*iptr = ret_i;
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FUNCTION_RETURN;
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}
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