Module rustc_apfloat::ieee::sig[−][src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Implementation details of IeeeFloat significands, such as big integer arithmetic. As a rule of thumb, no functions in this module should dynamically allocate.

Re-exports

use std::cmp::Ordering;

use std::mem;

use super::ExpInt;

use super::Limb;

use super::LIMB_BITS;

use super::limbs_for_bits;

use super::Loss;

Functions

add	[ Experimental ] `a += b + c` where `c` is zero or one. Returns the carry flag.
add_or_sub	[ Experimental ] `a += b` or `a -= b`. Does not preserve `b`.
clear_bit	[ Experimental ] Clear the given bit.
cmp	[ Experimental ] Comparison (unsigned) of two significands.
decrement	[ Experimental ] Decrement in-place, return the borrow flag.
div	[ Experimental ] `quotient = dividend / divisor`. Returns the lost fraction. Does not preserve `dividend` or `divisor`.
each_chunk	[ Experimental ] For every consecutive chunk of `bits` bits from `limbs`, going from most significant to the least significant bits, call `f` to transform those bits and store the result back.
extract	[ Experimental ] Copy the bit vector of width `src_bits` from `src`, starting at bit SRC_LSB, to `dst`, such that the bit SRC_LSB becomes the least significant bit of `dst`. All high bits above `src_bits` in `dst` are zero-filled.
from_limbs	[ Experimental ] We want the most significant PRECISION bits of `src`. There may not be that many; extract what we can.
get_bit	[ Experimental ] Extract the given bit.
increment	[ Experimental ] Increment in-place, return the carry flag.
is_all_zeros	[ Experimental ]
mul	[ Experimental ] `dst = a * b` (for normal `a` and `b`). Returns the lost fraction.
olsb	[ Experimental ] One, not zero, based LSB. That is, returns 0 for a zeroed significand.
omsb	[ Experimental ] One, not zero, based MSB. That is, returns 0 for a zeroed significand.
set_bit	[ Experimental ] Set the given bit.
shift_left	[ Experimental ] Shift `dst` left `bits` bits, subtract `bits` from its exponent.
shift_right	[ Experimental ] Shift `dst` right `bits` bits noting lost fraction.
sub	[ Experimental ] `a -= b + c` where `c` is zero or one. Returns the borrow flag.
widening_mul	[ Experimental ] `[low, high] = a * b`.