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Cleanup add builtin assignments

This commit is contained in:
Matt Ickstadt 2016-09-29 20:48:28 -05:00
parent 58e89b3024
commit 9b1fed8d3f
1 changed files with 18 additions and 18 deletions
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36
src/float/add.rs
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@ -9,27 +9,27 @@ macro_rules! add {
#[allow(unused_parens)] #[allow(unused_parens)]
#[cfg_attr(not(test), no_mangle)] #[cfg_attr(not(test), no_mangle)]
pub extern fn $intrinsic(a: $ty, b: $ty) -> $ty { pub extern fn $intrinsic(a: $ty, b: $ty) -> $ty {
let one = Wrapping(1 as <$ty as Float>::Int); let one = Wrapping(1 as <$ty as Float>::Int);
let zero = Wrapping(0 as <$ty as Float>::Int); let zero = Wrapping(0 as <$ty as Float>::Int);
let bits = Wrapping(<$ty>::bits() as <$ty as Float>::Int); let bits = Wrapping(<$ty>::bits() as <$ty as Float>::Int);
let significand_bits = Wrapping(<$ty>::significand_bits() as <$ty as Float>::Int); let significand_bits = Wrapping(<$ty>::significand_bits() as <$ty as Float>::Int);
let exponent_bits = Wrapping(<$ty>::exponent_bits() as <$ty as Float>::Int); let exponent_bits = Wrapping(<$ty>::exponent_bits() as <$ty as Float>::Int);
let max_exponent = (one << exponent_bits.0 as usize) - one; let max_exponent = (one << exponent_bits.0 as usize) - one;
let implicit_bit = one << significand_bits.0 as usize; let implicit_bit = one << significand_bits.0 as usize;
let significand_mask = implicit_bit - one; let significand_mask = implicit_bit - one;
let sign_bit = one << (significand_bits + exponent_bits).0 as usize; let sign_bit = one << (significand_bits + exponent_bits).0 as usize;
let abs_mask = sign_bit - one; let abs_mask = sign_bit - one;
let exponent_mask = abs_mask ^ significand_mask; let exponent_mask = abs_mask ^ significand_mask;
let inf_rep = exponent_mask; let inf_rep = exponent_mask;
let quiet_bit = implicit_bit >> 1; let quiet_bit = implicit_bit >> 1;
let qnan_rep = exponent_mask | quiet_bit; let qnan_rep = exponent_mask | quiet_bit;
let mut a_rep = Wrapping(a.repr()); let mut a_rep = Wrapping(a.repr());
let mut b_rep = Wrapping(b.repr()); let mut b_rep = Wrapping(b.repr());
let a_abs = a_rep & abs_mask; let a_abs = a_rep & abs_mask;
let b_abs = b_rep & abs_mask; let b_abs = b_rep & abs_mask;
// Detect if a or b is zero, infinity, or NaN. // Detect if a or b is zero, infinity, or NaN.
if a_abs - one >= inf_rep - one || if a_abs - one >= inf_rep - one ||