1 files changed, 0 insertions, 100 deletions
diff --git a/src/libcore/num/flt2dec/decoder.rs b/src/libcore/num/flt2dec/decoder.rs
deleted file mode 100644
index c43536c6fcc..00000000000
--- a/src/libcore/num/flt2dec/decoder.rs
+++ /dev/null
@@ -1,100 +0,0 @@
-//! Decodes a floating-point value into individual parts and error ranges.
-
-use crate::num::dec2flt::rawfp::RawFloat;
-use crate::num::FpCategory;
-
-/// Decoded unsigned finite value, such that:
-///
-/// - The original value equals to `mant * 2^exp`.
-///
-/// - Any number from `(mant - minus) * 2^exp` to `(mant + plus) * 2^exp` will
-///   round to the original value. The range is inclusive only when
-///   `inclusive` is `true`.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
-pub struct Decoded {
-    /// The scaled mantissa.
-    pub mant: u64,
-    /// The lower error range.
-    pub minus: u64,
-    /// The upper error range.
-    pub plus: u64,
-    /// The shared exponent in base 2.
-    pub exp: i16,
-    /// True when the error range is inclusive.
-    ///
-    /// In IEEE 754, this is true when the original mantissa was even.
-    pub inclusive: bool,
-}
-
-/// Decoded unsigned value.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
-pub enum FullDecoded {
-    /// Not-a-number.
-    Nan,
-    /// Infinities, either positive or negative.
-    Infinite,
-    /// Zero, either positive or negative.
-    Zero,
-    /// Finite numbers with further decoded fields.
-    Finite(Decoded),
-}
-
-/// A floating point type which can be `decode`d.
-pub trait DecodableFloat: RawFloat + Copy {
-    /// The minimum positive normalized value.
-    fn min_pos_norm_value() -> Self;
-}
-
-impl DecodableFloat for f32 {
-    fn min_pos_norm_value() -> Self {
-        f32::MIN_POSITIVE
-    }
-}
-
-impl DecodableFloat for f64 {
-    fn min_pos_norm_value() -> Self {
-        f64::MIN_POSITIVE
-    }
-}
-
-/// Returns a sign (true when negative) and `FullDecoded` value
-/// from given floating point number.
-pub fn decode<T: DecodableFloat>(v: T) -> (/*negative?*/ bool, FullDecoded) {
-    let (mant, exp, sign) = v.integer_decode();
-    let even = (mant & 1) == 0;
-    let decoded = match v.classify() {
-        FpCategory::Nan => FullDecoded::Nan,
-        FpCategory::Infinite => FullDecoded::Infinite,
-        FpCategory::Zero => FullDecoded::Zero,
-        FpCategory::Subnormal => {
-            // neighbors: (mant - 2, exp) -- (mant, exp) -- (mant + 2, exp)
-            // Float::integer_decode always preserves the exponent,
-            // so the mantissa is scaled for subnormals.
-            FullDecoded::Finite(Decoded { mant, minus: 1, plus: 1, exp, inclusive: even })
-        }
-        FpCategory::Normal => {
-            let minnorm = <T as DecodableFloat>::min_pos_norm_value().integer_decode();
-            if mant == minnorm.0 {
-                // neighbors: (maxmant, exp - 1) -- (minnormmant, exp) -- (minnormmant + 1, exp)
-                // where maxmant = minnormmant * 2 - 1
-                FullDecoded::Finite(Decoded {
-                    mant: mant << 2,
-                    minus: 1,
-                    plus: 2,
-                    exp: exp - 2,
-                    inclusive: even,
-                })
-            } else {
-                // neighbors: (mant - 1, exp) -- (mant, exp) -- (mant + 1, exp)
-                FullDecoded::Finite(Decoded {
-                    mant: mant << 1,
-                    minus: 1,
-                    plus: 1,
-                    exp: exp - 1,
-                    inclusive: even,
-                })
-            }
-        }
-    };
-    (sign < 0, decoded)
-}