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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#if __CLC_FPSIZE == 3210 11_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_exp2(__CLC_GENTYPE x) {12 // Reduce x13 const __CLC_GENTYPE ln2HI = 0x1.62e300p-1f;14 const __CLC_GENTYPE ln2LO = 0x1.2fefa2p-17f;15 16 __CLC_GENTYPE t = __clc_rint(x);17 __CLC_INTN p = __CLC_CONVERT_INTN(t);18 __CLC_GENTYPE tt = x - t;19 __CLC_GENTYPE hi = tt * ln2HI;20 __CLC_GENTYPE lo = tt * ln2LO;21 22 // Evaluate poly23 t = hi + lo;24 tt = t * t;25 __CLC_GENTYPE v = __clc_mad(26 tt,27 -__clc_mad(28 tt,29 __clc_mad(tt,30 __clc_mad(tt,31 __clc_mad(tt, 0x1.637698p-25f, -0x1.bbd41cp-20f),32 0x1.1566aap-14f),33 -0x1.6c16c2p-9f),34 0x1.555556p-3f),35 t);36 37 __CLC_GENTYPE y = 1.0f - (((-lo) - MATH_DIVIDE(t * v, 2.0f - v)) - hi);38 39 // Scale by 2^p40 __CLC_GENTYPE r = __CLC_AS_FLOATN(__CLC_AS_INTN(y) + (p << 23));41 42 const __CLC_GENTYPE ulim = 128.0f;43 const __CLC_GENTYPE llim = -126.0f;44 45 r = x < llim ? 0.0f : r;46 r = x < ulim ? r : __CLC_AS_FLOATN((__CLC_UINTN)0x7f800000);47 return __clc_isnan(x) ? x : r;48}49 50#elif __CLC_FPSIZE == 6451 52_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_exp2(__CLC_GENTYPE x) {53 const __CLC_GENTYPE R_LN2 = 0x1.62e42fefa39efp-1; // ln(2)54 const __CLC_GENTYPE R_1_BY_64 = 1.0 / 64.0;55 56 __CLC_INTN n = __CLC_CONVERT_INTN(x * 64.0);57 __CLC_GENTYPE r = R_LN2 * __clc_fma(-R_1_BY_64, __CLC_CONVERT_GENTYPE(n), x);58 59 return __clc_exp_helper(x, -1074.0, 1024.0, r, n);60}61 62#elif __CLC_FPSIZE == 1663 64_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_exp2(__CLC_GENTYPE x) {65 return __CLC_CONVERT_GENTYPE(__clc_exp2(__CLC_CONVERT_FLOATN(x)));66}67 68#endif69