derek.holloway
7502bf64a4
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53 lines
1.6 KiB
Common Lisp
53 lines
1.6 KiB
Common Lisp
/*===--------------------------------------------------------------------------
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* ROCm Device Libraries
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*
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* This file is distributed under the University of Illinois Open Source
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* License. See LICENSE.TXT for details.
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*===------------------------------------------------------------------------*/
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#include "mathD.h"
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CONSTATTR double
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MATH_MANGLE(len4)(double x, double y, double z, double w)
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{
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double a = BUILTIN_ABS_F64(x);
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double b = BUILTIN_ABS_F64(y);
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double c = BUILTIN_ABS_F64(z);
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double d = BUILTIN_ABS_F64(w);
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double a1 = BUILTIN_MAX_F64(a, b);
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double b1 = BUILTIN_MIN_F64(a, b);
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double c1 = BUILTIN_MAX_F64(c, d);
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double d1 = BUILTIN_MIN_F64(c, d);
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a = BUILTIN_MAX_F64(a1, c1);
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double c2 = BUILTIN_MIN_F64(a1, c1);
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double b2 = BUILTIN_MAX_F64(b1, d1);
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d = BUILTIN_MIN_F64(b1, d1);
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b = BUILTIN_MAX_F64(b2, c2);
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c = BUILTIN_MIN_F64(b2, c2);
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int e = BUILTIN_FREXP_EXP_F64(a);
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a = BUILTIN_FLDEXP_F64(a, -e);
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b = BUILTIN_FLDEXP_F64(b, -e);
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c = BUILTIN_FLDEXP_F64(c, -e);
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d = BUILTIN_FLDEXP_F64(d, -e);
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double ret = BUILTIN_FLDEXP_F64(MATH_FAST_SQRT(MATH_MAD(a, a, MATH_MAD(b, b, MATH_MAD(c, c, d*d)))), e);
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if (!FINITE_ONLY_OPT()) {
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ret = (BUILTIN_ISUNORDERED_F64(x, y) |
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BUILTIN_ISUNORDERED_F64(z, w)) ? QNAN_F64 : ret;
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ret = (BUILTIN_ISINF_F64(x) |
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BUILTIN_ISINF_F64(y) |
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BUILTIN_ISINF_F64(z) |
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BUILTIN_ISINF_F64(w)) ? PINF_F64 : ret;
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}
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return ret;
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}
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