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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/ryu/src/f2s_intrinsics.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
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diff --git a/vendor/ryu/src/f2s_intrinsics.rs b/vendor/ryu/src/f2s_intrinsics.rs
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-// Translated from C to Rust. The original C code can be found at
-// https://github.com/ulfjack/ryu and carries the following license:
-//
-// Copyright 2018 Ulf Adams
-//
-// The contents of this file may be used under the terms of the Apache License,
-// Version 2.0.
-//
-// (See accompanying file LICENSE-Apache or copy at
-// http://www.apache.org/licenses/LICENSE-2.0)
-//
-// Alternatively, the contents of this file may be used under the terms of
-// the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE-Boost or copy at
-// https://www.boost.org/LICENSE_1_0.txt)
-//
-// Unless required by applicable law or agreed to in writing, this software
-// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-// KIND, either express or implied.
-
-use crate::d2s;
-
-pub const FLOAT_POW5_INV_BITCOUNT: i32 = d2s::DOUBLE_POW5_INV_BITCOUNT - 64;
-pub const FLOAT_POW5_BITCOUNT: i32 = d2s::DOUBLE_POW5_BITCOUNT - 64;
-
-#[cfg_attr(feature = "no-panic", inline)]
-fn pow5factor_32(mut value: u32) -> u32 {
- let mut count = 0u32;
- loop {
- debug_assert!(value != 0);
- let q = value / 5;
- let r = value % 5;
- if r != 0 {
- break;
- }
- value = q;
- count += 1;
- }
- count
-}
-
-// Returns true if value is divisible by 5^p.
-#[cfg_attr(feature = "no-panic", inline)]
-pub fn multiple_of_power_of_5_32(value: u32, p: u32) -> bool {
- pow5factor_32(value) >= p
-}
-
-// Returns true if value is divisible by 2^p.
-#[cfg_attr(feature = "no-panic", inline)]
-pub fn multiple_of_power_of_2_32(value: u32, p: u32) -> bool {
- // __builtin_ctz doesn't appear to be faster here.
- (value & ((1u32 << p) - 1)) == 0
-}
-
-// It seems to be slightly faster to avoid uint128_t here, although the
-// generated code for uint128_t looks slightly nicer.
-#[cfg_attr(feature = "no-panic", inline)]
-fn mul_shift_32(m: u32, factor: u64, shift: i32) -> u32 {
- debug_assert!(shift > 32);
-
- // The casts here help MSVC to avoid calls to the __allmul library
- // function.
- let factor_lo = factor as u32;
- let factor_hi = (factor >> 32) as u32;
- let bits0 = m as u64 * factor_lo as u64;
- let bits1 = m as u64 * factor_hi as u64;
-
- let sum = (bits0 >> 32) + bits1;
- let shifted_sum = sum >> (shift - 32);
- debug_assert!(shifted_sum <= u32::max_value() as u64);
- shifted_sum as u32
-}
-
-#[cfg_attr(feature = "no-panic", inline)]
-pub fn mul_pow5_inv_div_pow2(m: u32, q: u32, j: i32) -> u32 {
- #[cfg(feature = "small")]
- {
- // The inverse multipliers are defined as [2^x / 5^y] + 1; the upper 64
- // bits from the double lookup table are the correct bits for [2^x /
- // 5^y], so we have to add 1 here. Note that we rely on the fact that
- // the added 1 that's already stored in the table never overflows into
- // the upper 64 bits.
- let pow5 = unsafe { d2s::compute_inv_pow5(q) };
- mul_shift_32(m, pow5.1 + 1, j)
- }
-
- #[cfg(not(feature = "small"))]
- {
- debug_assert!(q < d2s::DOUBLE_POW5_INV_SPLIT.len() as u32);
- unsafe {
- mul_shift_32(
- m,
- d2s::DOUBLE_POW5_INV_SPLIT.get_unchecked(q as usize).1 + 1,
- j,
- )
- }
- }
-}
-
-#[cfg_attr(feature = "no-panic", inline)]
-pub fn mul_pow5_div_pow2(m: u32, i: u32, j: i32) -> u32 {
- #[cfg(feature = "small")]
- {
- let pow5 = unsafe { d2s::compute_pow5(i) };
- mul_shift_32(m, pow5.1, j)
- }
-
- #[cfg(not(feature = "small"))]
- {
- debug_assert!(i < d2s::DOUBLE_POW5_SPLIT.len() as u32);
- unsafe { mul_shift_32(m, d2s::DOUBLE_POW5_SPLIT.get_unchecked(i as usize).1, j) }
- }
-}