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Diffstat (limited to 'src/devices/cpu/alpha/common.h')
-rw-r--r--src/devices/cpu/alpha/common.h14
1 files changed, 7 insertions, 7 deletions
diff --git a/src/devices/cpu/alpha/common.h b/src/devices/cpu/alpha/common.h
index ec2e7ebc236..0c9668f304a 100644
--- a/src/devices/cpu/alpha/common.h
+++ b/src/devices/cpu/alpha/common.h
@@ -7,13 +7,13 @@
#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 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) (s16(x)) // memory instruction 16-bit signed offset
-#define Disp_P(x) (s16(x << 4) >> 4) // hardware load/store 12-bit signed offset
-#define Disp_B(x) (s32(x << 11) >> 9) // branch instruction offset
+#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