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| author |  Jade Philipoom <jadep@google.com> | 2018-02-16 10:51:43 +0100 |
|---|---|---|
| committer |  Jason Gross <jasongross9@gmail.com> | 2018-02-23 13:06:33 -0500 |
| commit | 56bf29e5a4244d665f231b5a2602694a7414c762 (patch) | |
| tree | ef56863aaa50f283f66281191560cfdfc4c81456 /src/Util/ZUtil/Definitions.v | |
| parent | 53112bb801cdcfb68e2b390f0935b9d3fa74ec04 (diff) | |
Add new modular addition operation on Z
Diffstat (limited to 'src/Util/ZUtil/Definitions.v')
| -rw-r--r-- | src/Util/ZUtil/Definitions.v | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/Util/ZUtil/Definitions.v b/src/Util/ZUtil/Definitions.v index 760651a94..66fc7f558 100644 --- a/src/Util/ZUtil/Definitions.v +++ b/src/Util/ZUtil/Definitions.v @@ -10,6 +10,9 @@ Module Z. Definition zselect (cond zero_case nonzero_case : Z) := if cond =? 0 then zero_case else nonzero_case. + Definition add_modulo x y modulus := + if (modulus <=? x + y) then (x + y) - modulus else (x + y). + Definition get_carry (bitwidth : Z) (v : Z) : Z * Z := (v mod 2^bitwidth, v / 2^bitwidth). Definition add_with_carry (c : Z) (x y : Z) : Z |