mirror of
https://github.com/Z3Prover/z3
synced 2025-04-08 18:31:49 +00:00
68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
/*++
|
|
Copyright (c) 2012 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
mpfx.cpp
|
|
|
|
Abstract:
|
|
|
|
Multi precision fixed point numbers.
|
|
|
|
Author:
|
|
|
|
Leonardo de Moura (leonardo) 2012-09-19
|
|
|
|
Revision History:
|
|
|
|
--*/
|
|
#include"mpfx.h"
|
|
|
|
static void tst1() {
|
|
mpfx_manager m;
|
|
scoped_mpfx a(m), b(m), c(m);
|
|
m.set(a, 1);
|
|
m.set(b, 2);
|
|
std::cout << a << " + " << b << " == " << (a+b) << "\n";
|
|
m.set(a, 5);
|
|
m.set(c, 3);
|
|
m.display_raw(std::cout, (a*a*b)/c); std::cout << "\n";
|
|
m.display_decimal(std::cout, (a*a*b)/c); std::cout << "\n";
|
|
m.display_decimal(std::cout, (a*a*b)/c, 10); std::cout << "\n";
|
|
m.round_to_plus_inf();
|
|
m.display_decimal(std::cout, (a*a*b)/c); std::cout << "\n";
|
|
m.set(a, -1, 4);
|
|
m.display_decimal(std::cout, a); std::cout << "\n";
|
|
}
|
|
|
|
static void tst_prev_power_2(int64 n, uint64 d, unsigned expected) {
|
|
mpfx_manager m;
|
|
scoped_mpfx a(m);
|
|
m.set(a, n, d);
|
|
SASSERT(m.prev_power_of_two(a) == expected);
|
|
}
|
|
|
|
static void tst_prev_power_2() {
|
|
tst_prev_power_2(-10, 1, 0);
|
|
tst_prev_power_2(0, 1, 0);
|
|
tst_prev_power_2(1, 1, 0);
|
|
tst_prev_power_2(2, 1, 1);
|
|
tst_prev_power_2(3, 1, 1);
|
|
tst_prev_power_2(4, 1, 2);
|
|
tst_prev_power_2(5, 1, 2);
|
|
tst_prev_power_2(8, 1, 3);
|
|
tst_prev_power_2(9, 1, 3);
|
|
tst_prev_power_2(9, 2, 2);
|
|
tst_prev_power_2(9, 4, 1);
|
|
tst_prev_power_2(9, 5, 0);
|
|
tst_prev_power_2((1ll << 60) + 1, 1, 60);
|
|
tst_prev_power_2((1ll << 60), 1, 60);
|
|
tst_prev_power_2((1ll << 60) - 1, 1, 59);
|
|
tst_prev_power_2((1ll << 60), 3, 58);
|
|
}
|
|
|
|
void tst_mpfx() {
|
|
tst_prev_power_2();
|
|
tst1();
|
|
}
|