drc: handle regs-not-in-psxRegs case better

[pcsx_rearmed.git] / libpcsxcore / r3000a.c

diff --git a/libpcsxcore/r3000a.c b/libpcsxcore/r3000a.c
index ddf8388..8b7cfbf 100644 (file)
--- a/libpcsxcore/r3000a.c
+++ b/libpcsxcore/r3000a.c
@@ -84,7 +84,8 @@ void psxShutdown() {
        psxMemShutdown();
 }
 
-void psxException(u32 code, u32 bd) {
+// cp0 is passed separately for lightrec to be less messy
+void psxException(u32 code, u32 bd, psxCP0Regs *cp0) {
        psxRegs.code = PSXMu32(psxRegs.pc);
        
        if (!Config.HLE && ((((psxRegs.code) >> 24) & 0xfe) == 0x4a)) {
@@ -92,30 +93,30 @@ void psxException(u32 code, u32 bd) {
                // BIOS does not allow to return to GTE instructions
                // (just skips it, supposedly because it's scheduled already)
                // so we execute it here
-               psxCP2[psxRegs.code & 0x3f](&psxRegs.CP2);
+               psxCP2Regs *cp2 = (void *)(cp0 + 1);
+               psxCP2[psxRegs.code & 0x3f](cp2);
        }
 
        // Set the Cause
-       psxRegs.CP0.n.Cause = (psxRegs.CP0.n.Cause & 0x300) | code;
+       cp0->n.Cause = (cp0->n.Cause & 0x300) | code;
 
        // Set the EPC & PC
        if (bd) {
 #ifdef PSXCPU_LOG
                PSXCPU_LOG("bd set!!!\n");
 #endif
-               psxRegs.CP0.n.Cause |= 0x80000000;
-               psxRegs.CP0.n.EPC = (psxRegs.pc - 4);
+               cp0->n.Cause |= 0x80000000;
+               cp0->n.EPC = (psxRegs.pc - 4);
        } else
-               psxRegs.CP0.n.EPC = (psxRegs.pc);
+               cp0->n.EPC = (psxRegs.pc);
 
-       if (psxRegs.CP0.n.Status & 0x400000)
+       if (cp0->n.Status & 0x400000)
                psxRegs.pc = 0xbfc00180;
        else
                psxRegs.pc = 0x80000080;
 
        // Set the Status
-       psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) |
-                                                 ((psxRegs.CP0.n.Status & 0xf) << 2);
+       cp0->n.Status = (cp0->n.Status & ~0x3f) | ((cp0->n.Status & 0x0f) << 2);
 
        if (Config.HLE) psxBiosException();
 }
@@ -199,7 +200,7 @@ void psxBranchTest() {
                        PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074));
 #endif
 //                     SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074));
-                       psxException(0x400, 0);
+                       psxException(0x400, 0, &psxRegs.CP0);
                }
        }
 }