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Added negation for single argument

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Aleksey Lobanov
2019-12-08 23:54:34 +03:00
parent a6597e269e
commit 24fb0c87f4
1 changed files with 52 additions and 0 deletions
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52
al_function.hpp
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@@ -2,10 +2,27 @@
#define _AL_FUNCTION_HPP #define _AL_FUNCTION_HPP
#include <cassert> #include <cassert>
#include <cstdint>
#include <limits> #include <limits>
#include <string> #include <string>
uint32_t ones = 0b11111111111111111111111111111111;
uint32_t mask_1 = 0b01010101010101010101010101010101;
uint32_t remains_1 = 0b00000000000000000000000000000001;
uint32_t shift_1 = 1;
uint32_t mask_2 = 0b00110011001100110011001100110011;
uint32_t remains_2 = 0b00000000000000000000000000000011;
uint32_t shift_2 = 2;
uint32_t mask_3 = 0b00001111000011110000111100001111;
uint32_t remains_3 = 0b00000000000000000000000000001111;
uint32_t shift_3 = 4;
uint32_t mask_4 = 0b00000000111111110000000011111111;
uint32_t remains_4 = 0b00000000000000000000000011111111;
uint32_t shift_4 = 8;
template<class STORAGE, size_t VALUES_COUNT> template<class STORAGE, size_t VALUES_COUNT>
class Function { class Function {
public: public:
@@ -59,6 +76,41 @@ class Function {
return _function_values == other._function_values; return _function_values == other._function_values;
} }
Function var_negation(STORAGE var_index) {
// var_index should be in 1..VARS_COUNT
STORAGE mask, remains, shift;
switch (var_index) {
case 1:
mask = mask_1;
remains = remains_1;
shift = shift_1;
break;
case 2:
mask = mask_2;
remains = remains_2;
shift = shift_2;
break;
case 3:
mask = mask_3;
remains = remains_3;
shift = shift_3;
break;
case 4:
mask = mask_4;
remains = remains_4;
shift = shift_3;
break;
default:
assert(false);
}
STORAGE first_part = (_function_values & (~mask)) >> shift;
STORAGE second_part = (_function_values & mask) << shift;
return Function(first_part | second_part);
}
STORAGE value() const { STORAGE value() const {
return _function_values; return _function_values;
} }