vfp: Handle accesses to the VFP media feature registers

These are able to be accessed in any privilege mode.

src/core/arm/skyeye_common/arm_regformat.h

@@ -59,6 +59,8 @@ enum {
     VFP_FPSID,
     VFP_FPSCR,
     VFP_FPEXC,
+    VFP_MVFR0,
+    VFP_MVFR1,
 
     // Not an actual register.
     // All VFP system registers should be defined above this.

src/core/arm/skyeye_common/vfp/vfp.cpp

@@ -33,6 +33,10 @@ unsigned VFPInit(ARMul_State* state)
     state->VFP[VFP_FPEXC] = 0;
     state->VFP[VFP_FPSCR] = 0;
 
+    // ARM11 MPCore feature register values.
+    state->VFP[VFP_MVFR0] = 0x11111111;
+    state->VFP[VFP_MVFR1] = 0;
+
     return 0;
 }
 

src/core/arm/skyeye_common/vfp/vfpinstr.cpp

@@ -1141,12 +1141,10 @@ VMRS_INST:
                 cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_FPSID];
                 break;
             case 6:
-                /* MVFR1, VFPv3 only ? */
+                cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_MVFR1];
-                LOG_TRACE(Core_ARM11, "\tr%d <= MVFR1 unimplemented\n", inst_cream->Rt);
                 break;
             case 7:
-                /* MVFR0, VFPv3 only? */
+                cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_MVFR0];
-                LOG_TRACE(Core_ARM11, "\tr%d <= MVFR0 unimplemented\n", inst_cream->Rt);
                 break;
             case 8:
                 cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_FPEXC];