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14 Commits

Author SHA1 Message Date
Josh Stone 5c3d759d6c bigint: inline bits() methods 2016-08-10 22:23:28 -07:00
Kent Overstreet 279522316c bigint: Break out into multiple files 2016-07-18 15:56:03 -08:00
Kent Overstreet 8e0baecf5c Drop some dependencies on BigDigit's size 
Before:
test divide_0          ... bench:       1,011 ns/iter (+/- 184)
test divide_1          ... bench:      18,535 ns/iter (+/- 770)
test divide_2          ... bench:     990,467 ns/iter (+/- 91,980)
test fac_to_string     ... bench:       1,275 ns/iter (+/- 60)
test factorial_100     ... bench:       6,453 ns/iter (+/- 101)
test fib_100           ... bench:       1,142 ns/iter (+/- 99)
test fib_1000          ... bench:      18,713 ns/iter (+/- 2,172)
test fib_10000         ... bench:   1,197,965 ns/iter (+/- 21,178)
test fib_to_string     ... bench:         225 ns/iter (+/- 13)
test from_str_radix_02 ... bench:       3,460 ns/iter (+/- 626)
test from_str_radix_08 ... bench:       1,324 ns/iter (+/- 24)
test from_str_radix_10 ... bench:       1,488 ns/iter (+/- 19)
test from_str_radix_16 ... bench:         969 ns/iter (+/- 22)
test from_str_radix_36 ... bench:       1,135 ns/iter (+/- 23)
test hash              ... bench:     102,126 ns/iter (+/- 1,016)
test multiply_0        ... bench:         353 ns/iter (+/- 74)
test multiply_1        ... bench:      31,006 ns/iter (+/- 679)
test multiply_2        ... bench:   3,438,143 ns/iter (+/- 47,640)
test pow_bench         ... bench:   7,457,045 ns/iter (+/- 96,175)
test shl               ... bench:       5,627 ns/iter (+/- 121)
test shr               ... bench:       5,054 ns/iter (+/- 112)
test to_str_radix_02   ... bench:       2,774 ns/iter (+/- 88)
test to_str_radix_08   ... bench:         980 ns/iter (+/- 425)
test to_str_radix_10   ... bench:       3,029 ns/iter (+/- 115)
test to_str_radix_16   ... bench:         788 ns/iter (+/- 14)
test to_str_radix_36   ... bench:       8,285 ns/iter (+/- 175)

After:
test divide_0          ... bench:         925 ns/iter (+/- 30)
test divide_1          ... bench:      17,660 ns/iter (+/- 379)
test divide_2          ... bench:     972,427 ns/iter (+/- 7,560)
test fac_to_string     ... bench:       1,260 ns/iter (+/- 36)
test factorial_100     ... bench:       7,077 ns/iter (+/- 204)
test fib_100           ... bench:       1,124 ns/iter (+/- 32)
test fib_1000          ... bench:      18,475 ns/iter (+/- 166)
test fib_10000         ... bench:   1,192,748 ns/iter (+/- 27,128)
test fib_to_string     ... bench:         228 ns/iter (+/- 10)
test from_str_radix_02 ... bench:       3,379 ns/iter (+/- 74)
test from_str_radix_08 ... bench:       1,355 ns/iter (+/- 24)
test from_str_radix_10 ... bench:       1,470 ns/iter (+/- 20)
test from_str_radix_16 ... bench:         958 ns/iter (+/- 239)
test from_str_radix_36 ... bench:       1,137 ns/iter (+/- 19)
test hash              ... bench:     102,730 ns/iter (+/- 39,897)
test multiply_0        ... bench:         351 ns/iter (+/- 15)
test multiply_1        ... bench:      31,139 ns/iter (+/- 1,053)
test multiply_2        ... bench:   3,464,509 ns/iter (+/- 124,235)
test pow_bench         ... bench:   7,448,428 ns/iter (+/- 326,903)
test shl               ... bench:       5,784 ns/iter (+/- 190)
test shr               ... bench:       4,820 ns/iter (+/- 63)
test to_str_radix_02   ... bench:       2,757 ns/iter (+/- 33)
test to_str_radix_08   ... bench:         989 ns/iter (+/- 67)
test to_str_radix_10   ... bench:       3,045 ns/iter (+/- 70)
test to_str_radix_16   ... bench:         787 ns/iter (+/- 24)
test to_str_radix_36   ... bench:       8,257 ns/iter (+/- 117)/
 2016-07-14 21:56:16 -08:00
Josh Stone 8f5a27284c Remove an unused ToBigUint import 2016-07-12 00:40:10 -07:00
Josh Stone 388a3132b8 bigint: allow `Sub` to work in-place on the RHS 
A new Fibonacci benchmark demonstrates the improvement by using both
addition and subtraction in each iteration of the loop, like #200.

Before:

    test fib2_100          ... bench:       4,558 ns/iter (+/- 3,357)
    test fib2_1000         ... bench:      62,575 ns/iter (+/- 5,200)
    test fib2_10000        ... bench:   2,898,425 ns/iter (+/- 207,973)

After:

    test fib2_100          ... bench:       1,973 ns/iter (+/- 102)
    test fib2_1000         ... bench:      41,203 ns/iter (+/- 947)
    test fib2_10000        ... bench:   2,544,272 ns/iter (+/- 45,183)
 2016-07-08 17:34:12 -07:00
Josh Stone 609629d34d bigint: simplify the add2/sub2 loops 
This splits the main arithmetic loops from the final carry/borrow
propagation, and also normalizes the slice lengths before iteration.
This lets the optimizer generate better code for these functions.
 2016-06-29 18:19:47 -07:00
Kent Overstreet 1e65e9dc51 bigint: Fix calculation of size for multiply temporaries 
When x.len() and y.len() are both equal and odd, we have x1.len() + y1.len() + 1
(the required size to multiply x1 and y1) > y.len() + 1

This fixes #187
 2016-04-20 15:48:02 -08:00
Łukasz Jan Niemier 58b5fe5883 Serializers dependencies 2016-04-11 20:43:07 +02:00
Łukasz Jan Niemier e59ead7b3a Add Serde crate to `num_bigint` 2016-04-11 12:32:10 +02:00
Josh Stone 03884fdbcc bigint: reapply #176 2016-03-25 17:50:51 -07:00
Josh Stone aebbc4fd37 bigint: fix and un-ignore the first doctest 2016-03-25 17:50:51 -07:00
Josh Stone 21a328ad6d bigint, rational: use std::hash only for testing 2016-03-25 17:50:51 -07:00
Łukasz Jan Niemier 54685c46a1 Extract rational 2016-03-11 01:06:37 +01:00
Łukasz Jan Niemier 2176b7048c Extract bigint 2016-03-11 01:06:05 +01:00