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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /vendor/compiler_builtins/libm/src/math/modf.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | vendor/compiler_builtins/libm/src/math/modf.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/vendor/compiler_builtins/libm/src/math/modf.rs b/vendor/compiler_builtins/libm/src/math/modf.rs new file mode 100644 index 000000000..bcab33a81 --- /dev/null +++ b/vendor/compiler_builtins/libm/src/math/modf.rs @@ -0,0 +1,34 @@ +pub fn modf(x: f64) -> (f64, f64) { + let rv2: f64; + let mut u = x.to_bits(); + let mask: u64; + let e = ((u >> 52 & 0x7ff) as i32) - 0x3ff; + + /* no fractional part */ + if e >= 52 { + rv2 = x; + if e == 0x400 && (u << 12) != 0 { + /* nan */ + return (x, rv2); + } + u &= 1 << 63; + return (f64::from_bits(u), rv2); + } + + /* no integral part*/ + if e < 0 { + u &= 1 << 63; + rv2 = f64::from_bits(u); + return (x, rv2); + } + + mask = ((!0) >> 12) >> e; + if (u & mask) == 0 { + rv2 = x; + u &= 1 << 63; + return (f64::from_bits(u), rv2); + } + u &= !mask; + rv2 = f64::from_bits(u); + return (x - rv2, rv2); +} |