have the sign extend instructions also extend zero sign

4 years ago · 22cbfeb4ff
parent 5b163e969f
commit 22cbfeb4ff
1 changed files with 3 additions and 3 deletions
--- a/crsn_arith/src/exec.rs
+++ b/crsn_arith/src/exec.rs
@ -312,7 +312,7 @@ impl OpTrait for ArithOp {
                let res = if 0 != (val & 0x8000_0000) {
                    0xFFFF_FFFF_0000_0000 | val
                } else {
-                    val
+                    val & 0xFFFF_FFFF
                };
                state.update_status(res);
                state.write(dst, res)?;
@ -323,7 +323,7 @@ impl OpTrait for ArithOp {
                let res = if 0 != (val & 0x8000) {
                    0xFFFF_FFFF_FFFF_0000 | val
                } else {
-                    val
+                    val & 0xFFFF
                };
                state.update_status(res);
                state.write(dst, res)?;
@ -334,7 +334,7 @@ impl OpTrait for ArithOp {
                let res = if 0 != (val & 0x80) {
                    0xFFFF_FFFF_FFFF_FF00 | val
                } else {
-                    val
+                    val & 0xFF
                };
                state.update_status(res);
                state.write(dst, res)?;