diff --git a/riscv/test.c b/riscv/test.c
index 926244d..19c0a35 100644
--- a/riscv/test.c
+++ b/riscv/test.c
@@ -71,6 +71,31 @@ void test6(int8_t a,int8_t b){
 }
 
 
+
+void test7(uint32_t a,int b){
+  my_printf("shift right %08x, %08x\n",a,a>>b);
+}
+
+void test8(int32_t a,int b){
+  my_printf("shift right %08x, %08x\n",a,a>>b);
+}
+
+void test9(uint16_t a,int b){
+  my_printf("shift right %08x, %08x\n",a,a>>b);
+}
+
+void test10(int16_t a,int b){
+  my_printf("shift right %08x, %08x\n",a,a>>b);
+}
+
+void test11(uint8_t a,int b){
+  my_printf("shift right %08x, %08x\n",a,a>>b);
+}
+
+void test12(int8_t a,int b){
+  my_printf("shift right %08x, %08x\n",a,a>>b);
+}
+
 void cpu_test() {
 
   my_printf("test 32 bit\n");
@@ -90,7 +115,15 @@ void cpu_test() {
   test5(1,-2);
   test6(1,2);
   test6(1,-2);
-  
+
+  my_printf("shift test\n");
+  test7(0x80000000,7);
+  test8(0x80000000,7);
+  test9(0x8000,7);
+  test10(0x8000,7);
+  test11(0x80,7);
+  test12(0x80,7);
+
 }