Sha256: 4f198d06db1896386256fb9a5ac5b805b16b836226c18780a475cf18d7c1449c
Contents?: true
Size: 807 Bytes
Versions: 11
Compression:
Stored size: 807 Bytes
Contents
#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
pub fn scalbnf(mut x: f32, mut n: i32) -> f32 {
let x1p127 = f32::from_bits(0x7f000000); // 0x1p127f === 2 ^ 127
let x1p_126 = f32::from_bits(0x800000); // 0x1p-126f === 2 ^ -126
let x1p24 = f32::from_bits(0x4b800000); // 0x1p24f === 2 ^ 24
if n > 127 {
x *= x1p127;
n -= 127;
if n > 127 {
x *= x1p127;
n -= 127;
if n > 127 {
n = 127;
}
}
} else if n < -126 {
x *= x1p_126 * x1p24;
n += 126 - 24;
if n < -126 {
x *= x1p_126 * x1p24;
n += 126 - 24;
if n < -126 {
n = -126;
}
}
}
x * f32::from_bits(((0x7f + n) as u32) << 23)
}
Version data entries
11 entries across 11 versions & 1 rubygems