X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fgpu.cpp;h=c2cc94daf17ed0a7cc020be4954be331412d7781;hb=b73c60485dcb9ccb1ed2fd47437346fa6d3ef54b;hp=4892b7aa536d4bee7d790435bacfd929b621fa28;hpb=5da604521611a960140b58a2fb0f236c65610b70;p=virtualjaguar

diff --git a/src/gpu.cpp b/src/gpu.cpp
index 4892b7a..c2cc94d 100644
--- a/src/gpu.cpp
+++ b/src/gpu.cpp
@@ -13,6 +13,7 @@
 // Who  When        What
 // ---  ----------  -------------------------------------------------------------
 // JLH  01/16/2010  Created this log ;-)
+// JLH  11/26/2011  Added fixes for LOAD/STORE alignment issues
 
 //
 // Note: Endian wrongness probably stems from the MAME origins of this emu and
@@ -35,10 +36,15 @@
 //#include "memory.h"
 #include "tom.h"
 
+
+// Seems alignment in loads & stores was off...
+#define GPU_CORRECT_ALIGNMENT
+//#define GPU_CORRECT_ALIGNMENT_STORE
 //#define GPU_DEBUG
 
 // For GPU dissasembly...
 
+#if 1
 #define GPU_DIS_ABS
 #define GPU_DIS_ADD
 #define GPU_DIS_ADDC
@@ -94,9 +100,10 @@
 #define GPU_DIS_SUBQT
 #define GPU_DIS_XOR
 
-bool doGPUDis = false;
-//bool doGPUDis = true;
-//*/
+//bool doGPUDis = false;
+bool doGPUDis = true;
+#endif
+
 /*
 GPU opcodes use (BIOS flying ATARI logo):
 +	              add 357416
@@ -739,10 +746,11 @@ WriteLog("GPU: %s setting GPU PC to %08X %s\n", whoName[who], gpu_pc, (GPU_RUNNI
 //WriteLog("GPU->CPU interrupt\n");
 				if (TOMIRQEnabled(IRQ_GPU))
 				{
-					if ((TOMIRQEnabled(IRQ_GPU)) && (JaguarInterruptHandlerIsValid(64)))
+//This is the programmer's responsibility, to make sure the handler is valid, not ours!
+//					if ((TOMIRQEnabled(IRQ_GPU))// && (JaguarInterruptHandlerIsValid(64)))
 					{
 						TOMSetPendingGPUInt();
-						m68k_set_irq(7);			// Set 68000 NMI
+						m68k_set_irq(2);			// Set 68000 IPL 2
 						GPUReleaseTimeslice();
 					}
 				}
@@ -1724,7 +1732,11 @@ static void gpu_opcode_store_r14_indexed(void)
 	if (doGPUDis)
 		WriteLog("%06X: STORE  R%02u, (R14+$%02X) [NCZ:%u%u%u, R%02u=%08X, R14+$%02X=%08X]\n", gpu_pc-2, IMM_2, gpu_convert_zero[IMM_1] << 2, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN, gpu_convert_zero[IMM_1] << 2, gpu_reg[14]+(gpu_convert_zero[IMM_1] << 2));
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT_STORE
+	GPUWriteLong((gpu_reg[14] & 0xFFFFFFFC) + (gpu_convert_zero[IMM_1] << 2), RN, GPU);
+#else
 	GPUWriteLong(gpu_reg[14] + (gpu_convert_zero[IMM_1] << 2), RN, GPU);
+#endif
 }
 
 static void gpu_opcode_store_r15_indexed(void)
@@ -1733,7 +1745,11 @@ static void gpu_opcode_store_r15_indexed(void)
 	if (doGPUDis)
 		WriteLog("%06X: STORE  R%02u, (R15+$%02X) [NCZ:%u%u%u, R%02u=%08X, R15+$%02X=%08X]\n", gpu_pc-2, IMM_2, gpu_convert_zero[IMM_1] << 2, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN, gpu_convert_zero[IMM_1] << 2, gpu_reg[15]+(gpu_convert_zero[IMM_1] << 2));
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT_STORE
+	GPUWriteLong((gpu_reg[15] & 0xFFFFFFFC) + (gpu_convert_zero[IMM_1] << 2), RN, GPU);
+#else
 	GPUWriteLong(gpu_reg[15] + (gpu_convert_zero[IMM_1] << 2), RN, GPU);
+#endif
 }
 
 static void gpu_opcode_load_r14_ri(void)
@@ -1742,7 +1758,11 @@ static void gpu_opcode_load_r14_ri(void)
 	if (doGPUDis)
 		WriteLog("%06X: LOAD   (R14+R%02u), R%02u [NCZ:%u%u%u, R14+R%02u=%08X, R%02u=%08X] -> ", gpu_pc-2, IMM_1, IMM_2, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_1, RM+gpu_reg[14], IMM_2, RN);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT
+	RN = GPUReadLong((gpu_reg[14] + RM) & 0xFFFFFFFC, GPU);
+#else
 	RN = GPUReadLong(gpu_reg[14] + RM, GPU);
+#endif
 #ifdef GPU_DIS_LOAD14R
 	if (doGPUDis)
 		WriteLog("[NCZ:%u%u%u, R%02u=%08X]\n", gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN);
@@ -1755,7 +1775,11 @@ static void gpu_opcode_load_r15_ri(void)
 	if (doGPUDis)
 		WriteLog("%06X: LOAD   (R15+R%02u), R%02u [NCZ:%u%u%u, R15+R%02u=%08X, R%02u=%08X] -> ", gpu_pc-2, IMM_1, IMM_2, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_1, RM+gpu_reg[15], IMM_2, RN);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT
+	RN = GPUReadLong((gpu_reg[15] + RM) & 0xFFFFFFFC, GPU);
+#else
 	RN = GPUReadLong(gpu_reg[15] + RM, GPU);
+#endif
 #ifdef GPU_DIS_LOAD15R
 	if (doGPUDis)
 		WriteLog("[NCZ:%u%u%u, R%02u=%08X]\n", gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN);
@@ -1768,7 +1792,11 @@ static void gpu_opcode_store_r14_ri(void)
 	if (doGPUDis)
 		WriteLog("%06X: STORE  R%02u, (R14+R%02u) [NCZ:%u%u%u, R%02u=%08X, R14+R%02u=%08X]\n", gpu_pc-2, IMM_2, IMM_1, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN, IMM_1, RM+gpu_reg[14]);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT_STORE
+	GPUWriteLong((gpu_reg[14] + RM) & 0xFFFFFFFC, RN, GPU);
+#else
 	GPUWriteLong(gpu_reg[14] + RM, RN, GPU);
+#endif
 }
 
 static void gpu_opcode_store_r15_ri(void)
@@ -1777,7 +1805,11 @@ static void gpu_opcode_store_r15_ri(void)
 	if (doGPUDis)
 		WriteLog("%06X: STORE  R%02u, (R15+R%02u) [NCZ:%u%u%u, R%02u=%08X, R15+R%02u=%08X]\n", gpu_pc-2, IMM_2, IMM_1, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN, IMM_1, RM+gpu_reg[15]);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT_STORE
+	GPUWriteLong((gpu_reg[15] + RM) & 0xFFFFFFFC, RN, GPU);
+#else
 	GPUWriteLong(gpu_reg[15] + RM, RN, GPU);
+#endif
 }
 
 static void gpu_opcode_nop(void)
@@ -1827,10 +1859,17 @@ static void gpu_opcode_storew(void)
 	if (doGPUDis)
 		WriteLog("%06X: STOREW R%02u, (R%02u) [NCZ:%u%u%u, R%02u=%08X, R%02u=%08X]\n", gpu_pc-2, IMM_2, IMM_1, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN, IMM_1, RM);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT_STORE
+	if ((RM >= 0xF03000) && (RM <= 0xF03FFF))
+		GPUWriteLong(RM & 0xFFFFFFFE, RN & 0xFFFF, GPU);
+	else
+		JaguarWriteWord(RM & 0xFFFFFFFE, RN, GPU);
+#else
 	if ((RM >= 0xF03000) && (RM <= 0xF03FFF))
 		GPUWriteLong(RM, RN & 0xFFFF, GPU);
 	else
 		JaguarWriteWord(RM, RN, GPU);
+#endif
 }
 
 static void gpu_opcode_store(void)
@@ -1839,13 +1878,22 @@ static void gpu_opcode_store(void)
 	if (doGPUDis)
 		WriteLog("%06X: STORE  R%02u, (R%02u) [NCZ:%u%u%u, R%02u=%08X, R%02u=%08X]\n", gpu_pc-2, IMM_2, IMM_1, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN, IMM_1, RM);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT_STORE
+	GPUWriteLong(RM & 0xFFFFFFFC, RN, GPU);
+#else
 	GPUWriteLong(RM, RN, GPU);
+#endif
 }
 
 static void gpu_opcode_storep(void)
 {
+#ifdef GPU_CORRECT_ALIGNMENT_STORE
+	GPUWriteLong((RM & 0xFFFFFFF8) + 0, gpu_hidata, GPU);
+	GPUWriteLong((RM & 0xFFFFFFF8) + 4, RN, GPU);
+#else
 	GPUWriteLong(RM + 0, gpu_hidata, GPU);
 	GPUWriteLong(RM + 4, RN, GPU);
+#endif
 }
 
 static void gpu_opcode_loadb(void)
@@ -1870,23 +1918,37 @@ static void gpu_opcode_loadw(void)
 	if (doGPUDis)
 		WriteLog("%06X: LOADW  (R%02u), R%02u [NCZ:%u%u%u, R%02u=%08X, R%02u=%08X] -> ", gpu_pc-2, IMM_1, IMM_2, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_1, RM, IMM_2, RN);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT
+	if ((RM >= 0xF03000) && (RM <= 0xF03FFF))
+		RN = GPUReadLong(RM & 0xFFFFFFFE, GPU) & 0xFFFF;
+	else
+		RN = JaguarReadWord(RM & 0xFFFFFFFE, GPU);
+#else
 	if ((RM >= 0xF03000) && (RM <= 0xF03FFF))
 		RN = GPUReadLong(RM, GPU) & 0xFFFF;
 	else
 		RN = JaguarReadWord(RM, GPU);
+#endif
 #ifdef GPU_DIS_LOADW
 	if (doGPUDis)
 		WriteLog("[NCZ:%u%u%u, R%02u=%08X]\n", gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN);
 #endif
 }
 
+// According to the docs, & "Do The Same", this address is long aligned...
+// So let's try it:
+// And it works!!! Need to fix all instances...
 static void gpu_opcode_load(void)
 {
 #ifdef GPU_DIS_LOAD
 	if (doGPUDis)
 		WriteLog("%06X: LOAD   (R%02u), R%02u [NCZ:%u%u%u, R%02u=%08X, R%02u=%08X] -> ", gpu_pc-2, IMM_1, IMM_2, gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_1, RM, IMM_2, RN);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT
+	RN = GPUReadLong(RM & 0xFFFFFFFC, GPU);
+#else
 	RN = GPUReadLong(RM, GPU);
+#endif
 #ifdef GPU_DIS_LOAD
 	if (doGPUDis)
 		WriteLog("[NCZ:%u%u%u, R%02u=%08X]\n", gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN);
@@ -1895,8 +1957,13 @@ static void gpu_opcode_load(void)
 
 static void gpu_opcode_loadp(void)
 {
+#ifdef GPU_CORRECT_ALIGNMENT
+	gpu_hidata = GPUReadLong((RM & 0xFFFFFFF8) + 0, GPU);
+	RN		   = GPUReadLong((RM & 0xFFFFFFF8) + 4, GPU);
+#else
 	gpu_hidata = GPUReadLong(RM + 0, GPU);
 	RN		   = GPUReadLong(RM + 4, GPU);
+#endif
 }
 
 static void gpu_opcode_load_r14_indexed(void)
@@ -1905,7 +1972,11 @@ static void gpu_opcode_load_r14_indexed(void)
 	if (doGPUDis)
 		WriteLog("%06X: LOAD   (R14+$%02X), R%02u [NCZ:%u%u%u, R14+$%02X=%08X, R%02u=%08X] -> ", gpu_pc-2, gpu_convert_zero[IMM_1] << 2, IMM_2, gpu_flag_n, gpu_flag_c, gpu_flag_z, gpu_convert_zero[IMM_1] << 2, gpu_reg[14]+(gpu_convert_zero[IMM_1] << 2), IMM_2, RN);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT
+	RN = GPUReadLong((gpu_reg[14] & 0xFFFFFFFC) + (gpu_convert_zero[IMM_1] << 2), GPU);
+#else
 	RN = GPUReadLong(gpu_reg[14] + (gpu_convert_zero[IMM_1] << 2), GPU);
+#endif
 #ifdef GPU_DIS_LOAD14I
 	if (doGPUDis)
 		WriteLog("[NCZ:%u%u%u, R%02u=%08X]\n", gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN);
@@ -1918,7 +1989,11 @@ static void gpu_opcode_load_r15_indexed(void)
 	if (doGPUDis)
 		WriteLog("%06X: LOAD   (R15+$%02X), R%02u [NCZ:%u%u%u, R15+$%02X=%08X, R%02u=%08X] -> ", gpu_pc-2, gpu_convert_zero[IMM_1] << 2, IMM_2, gpu_flag_n, gpu_flag_c, gpu_flag_z, gpu_convert_zero[IMM_1] << 2, gpu_reg[15]+(gpu_convert_zero[IMM_1] << 2), IMM_2, RN);
 #endif
+#ifdef GPU_CORRECT_ALIGNMENT
+	RN = GPUReadLong((gpu_reg[15] & 0xFFFFFFFC) + (gpu_convert_zero[IMM_1] << 2), GPU);
+#else
 	RN = GPUReadLong(gpu_reg[15] + (gpu_convert_zero[IMM_1] << 2), GPU);
+#endif
 #ifdef GPU_DIS_LOAD15I
 	if (doGPUDis)
 		WriteLog("[NCZ:%u%u%u, R%02u=%08X]\n", gpu_flag_n, gpu_flag_c, gpu_flag_z, IMM_2, RN);