90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
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// Do not include this header directly.
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// This header defines shared struct spmd_kernel helpers.
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//
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// Copyright 2020-2021 Binomial LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// See cppspmd_math.h for detailed error statistics.
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CPPSPMD_FORCE_INLINE void reduce_expb(vfloat& arg, vfloat& two_int_a, vint& adjustment);
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CPPSPMD_FORCE_INLINE vfloat tan56(vfloat x);
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CPPSPMD_FORCE_INLINE vfloat tan82(vfloat x);
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inline vfloat log2_est(vfloat v);
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inline vfloat log_est(vfloat v);
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inline vfloat exp2_est(vfloat arg);
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inline vfloat exp_est(vfloat arg);
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inline vfloat pow_est(vfloat arg1, vfloat arg2);
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CPPSPMD_FORCE_INLINE vfloat recip_est1(const vfloat& q);
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CPPSPMD_FORCE_INLINE vfloat recip_est1_pn(const vfloat& q);
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inline vfloat mod_angles(vfloat a);
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inline vfloat sincos_est_a(vfloat a, bool sin_flag);
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CPPSPMD_FORCE_INLINE vfloat sin_est_a(vfloat a) { return sincos_est_a(a, true); }
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CPPSPMD_FORCE_INLINE vfloat cos_est_a(vfloat a) { return sincos_est_a(a, false); }
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inline vfloat sin_est(vfloat a);
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inline vfloat cos_est(vfloat a);
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// Don't call with values <= 0.
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CPPSPMD_FORCE_INLINE vfloat rsqrt_est1(vfloat x0);
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// Don't call with values <= 0.
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CPPSPMD_FORCE_INLINE vfloat rsqrt_est2(vfloat x0);
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CPPSPMD_FORCE_INLINE vfloat atan2_est(vfloat y, vfloat x);
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CPPSPMD_FORCE_INLINE vfloat atan_est(vfloat x) { return atan2_est(x, vfloat(1.0f)); }
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// Don't call this for angles close to 90/270!
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inline vfloat tan_est(vfloat x);
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// https://burtleburtle.net/bob/rand/smallprng.html
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struct rand_context { vint a, b, c, d; };
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inline void seed_rand(rand_context& x, vint seed);
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// Returns 32-bit unsigned random numbers.
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inline vint get_randu(rand_context& x);
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// Returns random numbers between [low, high), or low if low >= high
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inline vint get_randi(rand_context& x, vint low, vint high);
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// Returns random numbers between [low, high), or low if low >= high
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inline vfloat get_randf(rand_context& x, vfloat low, vfloat high);
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CPPSPMD_FORCE_INLINE void init_reverse_bits(vint& tab1, vint& tab2);
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CPPSPMD_FORCE_INLINE vint reverse_bits(vint k, vint tab1, vint tab2);
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CPPSPMD_FORCE_INLINE vint count_leading_zeros(vint x);
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CPPSPMD_FORCE_INLINE vint count_leading_zeros_alt(vint x);
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CPPSPMD_FORCE_INLINE vint count_trailing_zeros(vint x);
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CPPSPMD_FORCE_INLINE vint count_set_bits(vint x);
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void print_vint(vint v);
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void print_vbool(vbool v);
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void print_vint_hex(vint v);
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void print_active_lanes(const char *pPrefix);
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void print_vfloat(vfloat v);
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