| /* |
| * Copyright (c) 2005-2020 Rich Felker, et al. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Please see https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT |
| * for all contributors to musl. |
| */ |
| #include <math.h> |
| #include <stdint.h> |
| |
| float scalbnf(float x, int n) |
| { |
| union {float f; uint32_t i;} u; |
| float_t y = x; |
| |
| if (n > 127) { |
| y *= 0x1p127f; |
| n -= 127; |
| if (n > 127) { |
| y *= 0x1p127f; |
| n -= 127; |
| if (n > 127) |
| n = 127; |
| } |
| } else if (n < -126) { |
| y *= 0x1p-126f * 0x1p24f; |
| n += 126 - 24; |
| if (n < -126) { |
| y *= 0x1p-126f * 0x1p24f; |
| n += 126 - 24; |
| if (n < -126) |
| n = -126; |
| } |
| } |
| u.i = (uint32_t)(0x7f+n)<<23; |
| x = y * u.f; |
| return x; |
| } |
| |
| __strong_reference(scalbnf, ldexpf); |