EightBit/inc/Register.h
Adrian Conlon 67487b5b6e Simplify the usage of the register16_t union.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-06-16 00:55:32 +01:00

38 lines
684 B
C++

#pragma once
#include <cstdint>
#ifdef __BYTE_ORDER__
# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
# define HOST_LITTLE_ENDIAN
# endif
# if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
# define HOST_BIG_ENDIAN
# endif
#else
# if defined(_M_X64) || defined(_M_IX86)
# define HOST_LITTLE_ENDIAN
# else
# define HOST_BIG_ENDIAN
# endif
#endif
namespace EightBit {
union register16_t {
struct {
#ifdef HOST_LITTLE_ENDIAN
uint8_t low;
uint8_t high;
#endif
#ifdef HOST_BIG_ENDIAN
uint8_t high;
uint8_t low;
#endif
};
uint16_t word;
register16_t() : word(0) {}
register16_t(uint16_t w) : word(w) {}
register16_t(uint8_t l, uint8_t h) : low(l), high(h) {}
} ;
}