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fix-tests
libc/src/math/generic/cosf.cpp
65 строк
2 KB
Siva Chandra Reddy
[libc] Add a naming rule for global constants.
20 янв 2022, 01:11
20 янв 2022, 01:11
75d2fcb
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//===-- Single-precision cos function -------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #include "src/math/cosf.h" #include "math_utils.h" #include "sincosf_utils.h" #include "src/__support/common.h" #include <math.h> #include <stdint.h> namespace __llvm_libc { // Fast cosf implementation. Worst-case ULP is 0.5607, maximum relative // error is 0.5303 * 2^-23. A single-step range reduction is used for // small values. Large inputs have their range reduced using fast integer // arithmetic. LLVM_LIBC_FUNCTION(float, cosf, (float y)) { double x = y; double s; int n; const sincos_t *p = &SINCOSF_TABLE[0]; if (abstop12(y) < abstop12(PIO4)) { double x2 = x * x; if (unlikely(abstop12(y) < abstop12(as_float(0x39800000)))) return 1.0f; return sinf_poly(x, x2, p, 1); } else if (likely(abstop12(y) < abstop12(120.0f))) { x = reduce_fast(x, p, &n); // Setup the signs for sin and cos. s = p->sign[n & 3]; if (n & 2) p = &SINCOSF_TABLE[1]; return sinf_poly(x * s, x * x, p, n ^ 1); } else if (abstop12(y) < abstop12(INFINITY)) { uint32_t xi = as_uint32_bits(y); int sign = xi >> 31; x = reduce_large(xi, &n); // Setup signs for sin and cos - include original sign. s = p->sign[(n + sign) & 3]; if ((n + sign) & 2) p = &SINCOSF_TABLE[1]; return sinf_poly(x * s, x * x, p, n ^ 1); } return invalid(y); } } // namespace __llvm_libc