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// license:BSD-3-Clause
// copyright-holders:Patrick Mackinlay
#ifndef MAME_CPU_ALPHA_COMMON_H
#define MAME_CPU_ALPHA_COMMON_H
#pragma once
// instruction field extraction
#define Ra(x) ((x >> 21) & 31) // 'a' register field
#define Rb(x) ((x >> 16) & 31) // 'b' register field
#define Rc(x) (x & 31) // 'c' register field
#define Im(x) (u64(u8(x >> 13))) // literal immediate field
#define Disp_M(x) (s64(s16(x))) // memory instruction 16-bit signed offset
#define Disp_P(x) (s64(s16(x << 4)) >> 4) // hardware load/store 12-bit signed offset
#define Disp_B(x) (s64(s32(x << 11)) >> 9) // branch instruction offset
#endif // MAME_CPU_ALPHA_COMMON_H
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