armemu: Implement REVSH

1 files changed, 9 insertions, 5 deletions

diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp
index a62658b7c..71cae3db0 100644
--- a/src/core/arm/interpreter/armemu.cpp
+++ b/src/core/arm/interpreter/armemu.cpp
@@ -6076,10 +6076,10 @@ L_stm_s_takeabort:
                                         ror = 24;
                                         break;
 
-                                case 0xf3:
+                                case 0xf3: // REV
                                         DEST = ((RHS & 0xFF) << 24) | ((RHS & 0xFF00)) << 8 | ((RHS & 0xFF0000) >> 8) | ((RHS & 0xFF000000) >> 24);
                                         return 1;
-                                case 0xfb:
+                                case 0xfb: // REV16
                                         DEST = ((RHS & 0xFF) << 8) | ((RHS & 0xFF00)) >> 8 | ((RHS & 0xFF0000) << 8) | ((RHS & 0xFF000000) >> 8);
                                         return 1;
                                 default:
@@ -6206,9 +6206,13 @@ L_stm_s_takeabort:
                                         ror = 24;
                                         break;
 
-                                case 0xfb:
-                                        printf("Unhandled v6 insn: revsh\n");
-                                        return 0;
+                                case 0xfb: // REVSH
+                                {
+                                        DEST = ((RHS & 0xFF) << 8) | ((RHS & 0xFF00) >> 8);
+                                        if (DEST & 0x8000)
+                                                DEST |= 0xffff0000;
+                                        return 1;
+                                }
                                 default:
                                         break;
                         }