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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2012-10-02 11:48:48 -07:00
parent e9eab22e5c
commit 68269c43a6
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test/mpfx.cpp Normal file
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/*++
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();
}