diff --git a/src/devices/cpu/sparc/sparcdasm.cpp b/src/devices/cpu/sparc/sparcdasm.cpp
index a813892f8b3..c0a42cb0b79 100644
--- a/src/devices/cpu/sparc/sparcdasm.cpp
+++ b/src/devices/cpu/sparc/sparcdasm.cpp
@@ -13,9 +13,9 @@
 
 
 namespace {
-	int32_t get_disp16(uint32_t op) { return DISP19; }
+	int32_t get_disp16(uint32_t op) { return DISP16; }
 	int32_t get_disp19(uint32_t op) { return DISP19; }
-	int32_t get_disp22(uint32_t op) { return DISP19; }
+	int32_t get_disp22(uint32_t op) { return DISP22; }
 
 	const char *bicc_comment(const sparc_disassembler::config *conf, bool use_cc, offs_t pc, uint32_t op)
 	{
diff --git a/src/devices/cpu/sparc/sparcdefs.h b/src/devices/cpu/sparc/sparcdefs.h
index 12f5aba1937..66147c37780 100644
--- a/src/devices/cpu/sparc/sparcdefs.h
+++ b/src/devices/cpu/sparc/sparcdefs.h
@@ -99,7 +99,7 @@
 #define DISP30  (int32_t(op << 2))
 #define DISP22  util::sext(op << 2, 24)
 #define DISP19  util::sext(op << 2, 21)
-#define DISP16  (int32_t(((op << 10) & 0xc0000000) | ((op << 16) & 0x3fff0000)) >> 14)
+#define DISP16  util::sext((op & 0x300000) >> 4 | (op & 0x3fff) << 2, 18)
 #define IMM22   (op << 10)
 #define CONST22 (op & 0x3fffff)
 #define SIMM13  util::sext(op, 13)