// 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