forked from dolphin-emu/dolphin
		
	functions are passed by value rather than by reference This is part of a bigger change so please report if it broke compile git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5228 8ced0084-cf51-0410-be5f-012b33b47a6e
		
			
				
	
	
		
			505 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			505 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
| // Copyright (C) 2003 Dolphin Project.
 | |
| 
 | |
| // This program is free software: you can redistribute it and/or modify
 | |
| // it under the terms of the GNU General Public License as published by
 | |
| // the Free Software Foundation, version 2.0.
 | |
| 
 | |
| // This program is distributed in the hope that it will be useful,
 | |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of
 | |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 | |
| // GNU General Public License 2.0 for more details.
 | |
| 
 | |
| // A copy of the GPL 2.0 should have been included with the program.
 | |
| // If not, see http://www.gnu.org/licenses/
 | |
| 
 | |
| // Official SVN repository and contact information can be found at
 | |
| // http://code.google.com/p/dolphin-emu/
 | |
| #include "DSPIntUtil.h"
 | |
| #include "DSPMemoryMap.h"
 | |
| #include "DSPIntExtOps.h"
 | |
| 
 | |
| // Extended opcodes do not exist on their own. These opcodes can only be
 | |
| // attached to opcodes that allow extending (8 lower bits of opcode not used by
 | |
| // opcode). Extended opcodes do not modify program counter $pc register.
 | |
| 
 | |
| // Most of the suffixes increment or decrement one or more addressing registers
 | |
| // (the first four, ARx). The increment/decrement is either 1, or the
 | |
| // corresponding "index" register (the second four, IXx). The addressing
 | |
| // registers will wrap in odd ways, dictated by the corresponding wrapping
 | |
| // register, WP0-3.
 | |
| 
 | |
| // The following should be applied as a decrement (and is applied by
 | |
| // dsp_decrement_addr_reg):
 | |
| // ar[i] = (ar[i] & wp[i]) == 0 ? ar[i] | wp[i] : ar[i] - 1;
 | |
| // I have not found the corresponding algorithms for increments yet.
 | |
| // It's gotta be fairly simple though. See R3123, R3125 in Google Code.
 | |
| // (May have something to do with (ar[i] ^ wp[i]) == 0)
 | |
| 
 | |
| 
 | |
| namespace DSPInterpreter
 | |
| {
 | |
| 
 | |
| namespace Ext 
 | |
| {
 | |
| 
 | |
| inline bool IsSameMemArea(u16 a, u16 b)
 | |
| {
 | |
| //LM: tested on WII
 | |
| 	if ((a>>10)==(b>>10))
 | |
| 		return true;
 | |
| 	else
 | |
| 		return false;
 | |
| }
 | |
| 
 | |
| // DR $arR
 | |
| // xxxx xxxx 0000 01rr
 | |
| // Decrement addressing register $arR.
 | |
| void dr(const UDSPInstruction opc) {
 | |
| 	writeToBackLog(0, opc & 0x3, dsp_decrement_addr_reg(opc & 0x3));
 | |
| }
 | |
| 
 | |
| // IR $arR
 | |
| // xxxx xxxx 0000 10rr
 | |
| // Increment addressing register $arR.
 | |
| void ir(const UDSPInstruction opc) {
 | |
| 	writeToBackLog(0, opc & 0x3, dsp_increment_addr_reg(opc & 0x3));
 | |
| }
 | |
| 
 | |
| // NR $arR
 | |
| // xxxx xxxx 0000 11rr
 | |
| // Add corresponding indexing register $ixR to addressing register $arR.
 | |
| void nr(const UDSPInstruction opc) {
 | |
| 	u8 reg = opc & 0x3;	
 | |
| 	
 | |
| 	writeToBackLog(0, reg, dsp_increase_addr_reg(reg, (s16)g_dsp.r[DSP_REG_IX0 + reg]));
 | |
| }
 | |
| 
 | |
| // MV $axD.D, $acS.S
 | |
| // xxxx xxxx 0001 ddss
 | |
| // Move value of $acS.S to the $axD.D.
 | |
| void mv(const UDSPInstruction opc)
 | |
| {
 | |
|  	u8 sreg = (opc & 0x3) + DSP_REG_ACL0;
 | |
| 	u8 dreg = ((opc >> 2) & 0x3);
 | |
| 
 | |
| #if 0 //more tests 
 | |
| 	if ((sreg >= DSP_REG_ACM0) && (g_dsp.r[DSP_REG_SR] & SR_40_MODE_BIT)) 
 | |
| 		writeToBackLog(0, dreg + DSP_REG_AXL0, ((u16)dsp_get_acc_h(sreg-DSP_REG_ACM0) & 0x0080) ? 0x8000 : 0x7fff);
 | |
| 	else
 | |
| #endif	
 | |
| 		writeToBackLog(0, dreg + DSP_REG_AXL0, g_dsp.r[sreg]);
 | |
| }
 | |
| 	
 | |
| // S @$arD, $acS.S
 | |
| // xxxx xxxx 001s s0dd
 | |
| // Store value of $acS.S in the memory pointed by register $arD.
 | |
| // Post increment register $arD.
 | |
| void s(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 dreg = opc & 0x3;
 | |
| 	u8 sreg = ((opc >> 3) & 0x3) + DSP_REG_ACL0;
 | |
| 
 | |
| 	dsp_dmem_write(g_dsp.r[dreg], g_dsp.r[sreg]);
 | |
| 	writeToBackLog(0, dreg,	dsp_increment_addr_reg(dreg));
 | |
| }
 | |
| 
 | |
| // SN @$arD, $acS.S
 | |
| // xxxx xxxx 001s s1dd
 | |
| // Store value of register $acS.S in the memory pointed by register $arD.
 | |
| // Add indexing register $ixD to register $arD.
 | |
| void sn(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 dreg = opc & 0x3;
 | |
| 	u8 sreg = ((opc >> 3) & 0x3) + DSP_REG_ACL0;
 | |
| 
 | |
| 	dsp_dmem_write(g_dsp.r[dreg], g_dsp.r[sreg]);
 | |
| 	writeToBackLog(0, dreg,	dsp_increase_addr_reg(dreg, (s16)g_dsp.r[DSP_REG_IX0 + dreg]));
 | |
| }
 | |
| 
 | |
| // L $axD.D, @$arS
 | |
| // xxxx xxxx 01dd d0ss
 | |
| // Load $axD.D/$acD.D with value from memory pointed by register $arS. 
 | |
| // Post increment register $arS.
 | |
| void l(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = opc & 0x3;
 | |
| 	u8 dreg = ((opc >> 3) & 0x7) + DSP_REG_AXL0;
 | |
| 	
 | |
| 	if ((dreg >= DSP_REG_ACM0) && (g_dsp.r[DSP_REG_SR] & SR_40_MODE_BIT)) 
 | |
| 	{
 | |
| 		u16 val = dsp_dmem_read(g_dsp.r[sreg]);
 | |
| 		writeToBackLog(0, dreg - DSP_REG_ACM0 + DSP_REG_ACH0, (val & 0x8000) ? 0xFFFF : 0x0000);
 | |
| 		writeToBackLog(1, dreg,	val);
 | |
| 		writeToBackLog(2, dreg - DSP_REG_ACM0 + DSP_REG_ACL0, 0);
 | |
| 		writeToBackLog(3, sreg, dsp_increment_addr_reg(sreg));
 | |
| 	}
 | |
| 	else
 | |
| 	{
 | |
| 		writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 		writeToBackLog(1, sreg, dsp_increment_addr_reg(sreg));
 | |
| 	}
 | |
| }
 | |
| 
 | |
| // LN $axD.D, @$arS
 | |
| // xxxx xxxx 01dd d0ss
 | |
| // Load $axD.D/$acD.D with value from memory pointed by register $arS. 
 | |
| // Add indexing register register $ixS to register $arS.
 | |
| void ln(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = opc & 0x3;
 | |
| 	u8 dreg = ((opc >> 3) & 0x7) + DSP_REG_AXL0;
 | |
| 
 | |
| 	if ((dreg >= DSP_REG_ACM0) && (g_dsp.r[DSP_REG_SR] & SR_40_MODE_BIT)) 
 | |
| 	{
 | |
| 		u16 val = dsp_dmem_read(g_dsp.r[sreg]);
 | |
| 		writeToBackLog(0, dreg - DSP_REG_ACM0 + DSP_REG_ACH0, (val & 0x8000) ? 0xFFFF : 0x0000);
 | |
| 		writeToBackLog(1, dreg,	val);
 | |
| 		writeToBackLog(2, dreg - DSP_REG_ACM0 + DSP_REG_ACL0, 0);
 | |
| 		writeToBackLog(3, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
 | |
| 	}
 | |
| 	else
 | |
| 	{
 | |
| 		writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 		writeToBackLog(1, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
 | |
| 	}
 | |
| }
 | |
| 
 | |
| // LS $axD.D, $acS.m
 | |
| // xxxx xxxx 10dd 000s
 | |
| // Load register $axD.D with value from memory pointed by register
 | |
| // $ar0. Store value from register $acS.m to memory location pointed by
 | |
| // register $ar3. Increment both $ar0 and $ar3.
 | |
| void ls(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = (opc & 0x1) + DSP_REG_ACM0;
 | |
| 	u8 dreg = ((opc >> 4) & 0x3) + DSP_REG_AXL0;
 | |
| 
 | |
| 	dsp_dmem_write(g_dsp.r[DSP_REG_AR3], g_dsp.r[sreg]);
 | |
| 
 | |
| 	writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[DSP_REG_AR0]));
 | |
| 	writeToBackLog(1, DSP_REG_AR3, dsp_increment_addr_reg(DSP_REG_AR3));
 | |
| 	writeToBackLog(2, DSP_REG_AR0, dsp_increment_addr_reg(DSP_REG_AR0)); 
 | |
| }
 | |
| 
 | |
| 
 | |
| // LSN $axD.D, $acS.m
 | |
| // xxxx xxxx 10dd 010s
 | |
| // Load register $axD.D with value from memory pointed by register
 | |
| // $ar0. Store value from register $acS.m to memory location pointed by
 | |
| // register $ar3. Add corresponding indexing register $ix0 to addressing
 | |
| // register $ar0 and increment $ar3.
 | |
| void lsn(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = (opc & 0x1) + DSP_REG_ACM0;
 | |
| 	u8 dreg = ((opc >> 4) & 0x3) + DSP_REG_AXL0;
 | |
| 
 | |
| 	dsp_dmem_write(g_dsp.r[DSP_REG_AR3], g_dsp.r[sreg]);
 | |
| 
 | |
| 	writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[DSP_REG_AR0]));
 | |
| 	writeToBackLog(1, DSP_REG_AR3, dsp_increment_addr_reg(DSP_REG_AR3));
 | |
| 	writeToBackLog(2, DSP_REG_AR0, dsp_increase_addr_reg(DSP_REG_AR0, (s16)g_dsp.r[DSP_REG_IX0]));
 | |
| }
 | |
| 
 | |
| // LSM $axD.D, $acS.m
 | |
| // xxxx xxxx 10dd 100s
 | |
| // Load register $axD.D with value from memory pointed by register
 | |
| // $ar0. Store value from register $acS.m to memory location pointed by
 | |
| // register $ar3. Add corresponding indexing register $ix3 to addressing
 | |
| // register $ar3 and increment $ar0.
 | |
| void lsm(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = (opc & 0x1) + DSP_REG_ACM0;
 | |
| 	u8 dreg = ((opc >> 4) & 0x3) + DSP_REG_AXL0;
 | |
| 	
 | |
| 	dsp_dmem_write(g_dsp.r[DSP_REG_AR3], g_dsp.r[sreg]);
 | |
| 
 | |
| 	writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[DSP_REG_AR0]));
 | |
| 	writeToBackLog(1, DSP_REG_AR3, dsp_increase_addr_reg(DSP_REG_AR3, (s16)g_dsp.r[DSP_REG_IX0 + DSP_REG_AR3]));
 | |
| 	writeToBackLog(2, DSP_REG_AR0, dsp_increment_addr_reg(DSP_REG_AR0));
 | |
| }
 | |
| 
 | |
| // LSMN $axD.D, $acS.m
 | |
| // xxxx xxxx 10dd 110s
 | |
| // Load register $axD.D with value from memory pointed by register
 | |
| // $ar0. Store value from register $acS.m to memory location pointed by
 | |
| // register $ar3. Add corresponding indexing register $ix0 to addressing
 | |
| // register $ar0 and add corresponding indexing register $ix3 to addressing
 | |
| // register $ar3.
 | |
| void lsnm(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = (opc & 0x1) + DSP_REG_ACM0;
 | |
| 	u8 dreg = ((opc >> 4) & 0x3) + DSP_REG_AXL0;
 | |
| 	
 | |
| 	dsp_dmem_write(g_dsp.r[DSP_REG_AR3], g_dsp.r[sreg]);
 | |
| 
 | |
| 	writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[DSP_REG_AR0]));
 | |
| 	writeToBackLog(1, DSP_REG_AR3, dsp_increase_addr_reg(DSP_REG_AR3, (s16)g_dsp.r[DSP_REG_IX0 + DSP_REG_AR3]));
 | |
| 	writeToBackLog(2, DSP_REG_AR0, dsp_increase_addr_reg(DSP_REG_AR0, (s16)g_dsp.r[DSP_REG_IX0]));
 | |
| }
 | |
| 
 | |
| // SL $acS.m, $axD.D
 | |
| // xxxx xxxx 10dd 001s
 | |
| // Store value from register $acS.m to memory location pointed by register
 | |
| // $ar0. Load register $axD.D with value from memory pointed by register
 | |
| // $ar3. Increment both $ar0 and $ar3.
 | |
| void sl(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = (opc & 0x1) + DSP_REG_ACM0;
 | |
| 	u8 dreg = ((opc >> 4) & 0x3) + DSP_REG_AXL0;
 | |
| 	
 | |
| 	dsp_dmem_write(g_dsp.r[DSP_REG_AR0], g_dsp.r[sreg]);
 | |
| 
 | |
| 	writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 	writeToBackLog(1, DSP_REG_AR3, dsp_increment_addr_reg(DSP_REG_AR3));
 | |
| 	writeToBackLog(2, DSP_REG_AR0, dsp_increment_addr_reg(DSP_REG_AR0)); 
 | |
| }
 | |
| 
 | |
| // SLN $acS.m, $axD.D
 | |
| // xxxx xxxx 10dd 011s
 | |
| // Store value from register $acS.m to memory location pointed by register
 | |
| // $ar0. Load register $axD.D with value from memory pointed by register
 | |
| // $ar3. Add corresponding indexing register $ix0 to addressing register $ar0
 | |
| // and increment $ar3.
 | |
| void sln(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = (opc & 0x1) + DSP_REG_ACM0;
 | |
| 	u8 dreg = ((opc >> 4) & 0x3) + DSP_REG_AXL0;
 | |
| 	
 | |
| 	dsp_dmem_write(g_dsp.r[DSP_REG_AR0], g_dsp.r[sreg]);
 | |
| 	
 | |
| 	writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 	writeToBackLog(1, DSP_REG_AR3, dsp_increment_addr_reg(DSP_REG_AR3));
 | |
| 	writeToBackLog(2, DSP_REG_AR0, dsp_increase_addr_reg(DSP_REG_AR0, (s16)g_dsp.r[DSP_REG_IX0]));
 | |
| }
 | |
| 
 | |
| // SLM $acS.m, $axD.D
 | |
| // xxxx xxxx 10dd 101s
 | |
| // Store value from register $acS.m to memory location pointed by register
 | |
| // $ar0. Load register $axD.D with value from memory pointed by register
 | |
| // $ar3. Add corresponding indexing register $ix3 to addressing register $ar3
 | |
| // and increment $ar0.
 | |
| void slm(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = (opc & 0x1) + DSP_REG_ACM0;
 | |
| 	u8 dreg = ((opc >> 4) & 0x3) + DSP_REG_AXL0;
 | |
| 	
 | |
| 	dsp_dmem_write(g_dsp.r[DSP_REG_AR0], g_dsp.r[sreg]);
 | |
| 
 | |
| 	writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 	writeToBackLog(1, DSP_REG_AR3, dsp_increase_addr_reg(DSP_REG_AR3, (s16)g_dsp.r[DSP_REG_IX0 + DSP_REG_AR3]));
 | |
| 	writeToBackLog(2, DSP_REG_AR0, dsp_increment_addr_reg(DSP_REG_AR0));
 | |
| }
 | |
| 
 | |
| // SLMN $acS.m, $axD.D
 | |
| // xxxx xxxx 10dd 111s
 | |
| // Store value from register $acS.m to memory location pointed by register
 | |
| // $ar0. Load register $axD.D with value from memory pointed by register
 | |
| // $ar3. Add corresponding indexing register $ix0 to addressing register $ar0
 | |
| // and add corresponding indexing register $ix3 to addressing register $ar3.
 | |
| void slnm(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 sreg = (opc & 0x1) + DSP_REG_ACM0;
 | |
| 	u8 dreg = ((opc >> 4) & 0x3) + DSP_REG_AXL0;
 | |
| 	
 | |
| 	dsp_dmem_write(g_dsp.r[DSP_REG_AR0], g_dsp.r[sreg]);
 | |
| 
 | |
| 	writeToBackLog(0, dreg,	dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 	writeToBackLog(1, DSP_REG_AR3, dsp_increase_addr_reg(DSP_REG_AR3, (s16)g_dsp.r[DSP_REG_IX0 + DSP_REG_AR3]));
 | |
| 	writeToBackLog(2, DSP_REG_AR0, dsp_increase_addr_reg(DSP_REG_AR0, (s16)g_dsp.r[DSP_REG_IX0]));
 | |
| }
 | |
| 
 | |
| // LD $ax0.d, $ax1.r, @$arS
 | |
| // xxxx xxxx 11dr 00ss
 | |
| // example for "nx'ld $AX0.L, $AX1.L, @$AR3"
 | |
| // Loads the word pointed by AR0 to AX0.H, then loads the word pointed by AR3 to AX0.L. 
 | |
| // Increments AR0 and AR3.
 | |
| // If AR0 and AR3 point into the same memory page (upper 6 bits of addr are the same -> games are not doing that!)
 | |
| // then the value pointed by AR0 is loaded to BOTH AX0.H and AX0.L.
 | |
| // If AR0 points into an invalid memory page (ie 0x2000), then AX0.H keeps its old value. (not implemented yet)
 | |
| // If AR3 points into an invalid memory page, then AX0.L gets the same value as AX0.H. (not implemented yet)
 | |
| void ld(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 dreg = (opc >> 5) & 0x1;
 | |
| 	u8 rreg = (opc >> 4) & 0x1;
 | |
| 	u8 sreg = opc & 0x3;
 | |
| 
 | |
| 	if (sreg != DSP_REG_AR3) {
 | |
| 		writeToBackLog(0, (dreg << 1) + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 
 | |
| 		if (IsSameMemArea(g_dsp.r[sreg], g_dsp.r[DSP_REG_AR3]))	
 | |
| 			writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 		else
 | |
| 			writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 
 | |
| 		writeToBackLog(2, sreg,	dsp_increment_addr_reg(sreg));
 | |
| 	} else {
 | |
| 		writeToBackLog(0, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[dreg]));
 | |
| 
 | |
| 		if (IsSameMemArea(g_dsp.r[dreg], g_dsp.r[DSP_REG_AR3]))	
 | |
| 			writeToBackLog(1, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[dreg]));
 | |
| 		else
 | |
| 			writeToBackLog(1, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 
 | |
| 		writeToBackLog(2, dreg,	dsp_increment_addr_reg(dreg));
 | |
| 	}
 | |
| 
 | |
| 	writeToBackLog(3, DSP_REG_AR3, dsp_increment_addr_reg(DSP_REG_AR3));
 | |
| }
 | |
| 
 | |
| // LDN $ax0.d, $ax1.r, @$arS
 | |
| // xxxx xxxx 11dr 01ss
 | |
| void ldn(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 dreg = (opc >> 5) & 0x1;
 | |
| 	u8 rreg = (opc >> 4) & 0x1;
 | |
| 	u8 sreg = opc & 0x3;
 | |
| 	
 | |
| 	if (sreg != DSP_REG_AR3) {
 | |
| 		writeToBackLog(0, (dreg << 1) + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 
 | |
| 		if (IsSameMemArea(g_dsp.r[sreg], g_dsp.r[DSP_REG_AR3]))	
 | |
| 			writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 		else
 | |
| 			writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 
 | |
| 		writeToBackLog(2, sreg,	dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
 | |
| 	} else {
 | |
| 		writeToBackLog(0, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[dreg]));
 | |
| 
 | |
| 		if (IsSameMemArea(g_dsp.r[dreg], g_dsp.r[DSP_REG_AR3]))	
 | |
| 			writeToBackLog(1, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[dreg]));
 | |
| 		else
 | |
| 			writeToBackLog(1, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 
 | |
| 		writeToBackLog(2, dreg,	dsp_increase_addr_reg(dreg, (s16)g_dsp.r[DSP_REG_IX0 + dreg]));
 | |
| 	}
 | |
| 	
 | |
| 	writeToBackLog(3, DSP_REG_AR3, dsp_increment_addr_reg(DSP_REG_AR3));
 | |
| }
 | |
| 
 | |
| // LDM $ax0.d, $ax1.r, @$arS
 | |
| // xxxx xxxx 11dr 10ss
 | |
| void ldm(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 dreg = (opc >> 5) & 0x1;
 | |
| 	u8 rreg = (opc >> 4) & 0x1;
 | |
| 	u8 sreg = opc & 0x3;
 | |
| 
 | |
| 	if (sreg != DSP_REG_AR3) {
 | |
| 		writeToBackLog(0, (dreg << 1) + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 
 | |
| 		if (IsSameMemArea(g_dsp.r[sreg], g_dsp.r[DSP_REG_AR3]))	
 | |
| 			writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 		else
 | |
| 			writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 
 | |
| 		writeToBackLog(2, sreg,	dsp_increment_addr_reg(sreg));
 | |
| 	} else {
 | |
| 		writeToBackLog(0, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[dreg]));
 | |
| 
 | |
| 		if (IsSameMemArea(g_dsp.r[dreg], g_dsp.r[DSP_REG_AR3]))	
 | |
| 			writeToBackLog(1, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[dreg]));
 | |
| 		else
 | |
| 			writeToBackLog(1, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 
 | |
| 		writeToBackLog(2, dreg,	dsp_increment_addr_reg(dreg));
 | |
| 	}
 | |
| 
 | |
| 	writeToBackLog(3, DSP_REG_AR3,
 | |
| 				   dsp_increase_addr_reg(DSP_REG_AR3, (s16)g_dsp.r[DSP_REG_IX0 + DSP_REG_AR3]));
 | |
| }
 | |
| 
 | |
| // LDNM $ax0.d, $ax1.r, @$arS
 | |
| // xxxx xxxx 11dr 11ss
 | |
| void ldnm(const UDSPInstruction opc)
 | |
| {
 | |
| 	u8 dreg = (opc >> 5) & 0x1;
 | |
| 	u8 rreg = (opc >> 4) & 0x1;
 | |
| 	u8 sreg = opc & 0x3;
 | |
| 
 | |
| 	if (sreg != DSP_REG_AR3) {
 | |
| 		writeToBackLog(0, (dreg << 1) + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 
 | |
| 		if (IsSameMemArea(g_dsp.r[sreg], g_dsp.r[DSP_REG_AR3]))	
 | |
| 			writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[sreg]));
 | |
| 		else
 | |
| 			writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 
 | |
| 		writeToBackLog(2, sreg,	dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
 | |
| 	} else {
 | |
| 		writeToBackLog(0, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[dreg]));
 | |
| 
 | |
| 		if (IsSameMemArea(g_dsp.r[dreg], g_dsp.r[DSP_REG_AR3]))	
 | |
| 			writeToBackLog(1, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[dreg]));
 | |
| 		else
 | |
| 			writeToBackLog(1, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[DSP_REG_AR3]));
 | |
| 
 | |
| 		writeToBackLog(2, dreg,	dsp_increase_addr_reg(dreg, (s16)g_dsp.r[DSP_REG_IX0 + dreg]));
 | |
| 	}
 | |
| 
 | |
| 	writeToBackLog(3, DSP_REG_AR3,
 | |
| 				   dsp_increase_addr_reg(DSP_REG_AR3, (s16)g_dsp.r[DSP_REG_IX0 + DSP_REG_AR3]));
 | |
| }
 | |
| 
 | |
| 
 | |
| void nop(const UDSPInstruction opc)
 | |
| {
 | |
| }
 | |
| 
 | |
| } // end namespace ext
 | |
| } // end namespace DSPInterpeter
 | |
| 
 | |
| 
 | |
| // The ext ops are calculated in parallel with the actual op. That means that
 | |
| // both the main op and the ext op see the same register state as input. The
 | |
| // output is simple as long as the main and ext ops don't change the same
 | |
| // register. If they do the output is the bitwise or of the result of both the
 | |
| // main and ext ops.
 | |
| 
 | |
| // The ext op are writing their output into the backlog which is
 | |
| // being applied to the real registers after the main op was executed
 | |
| void applyWriteBackLog()
 | |
| {
 | |
| 	// always make sure to have an extra entry at the end w/ -1 to avoid
 | |
| 	// infinitive loops
 | |
| 	for (int i = 0; writeBackLogIdx[i] != -1; i++) {
 | |
| 		dsp_op_write_reg(writeBackLogIdx[i], g_dsp.r[writeBackLogIdx[i]] | writeBackLog[i]);
 | |
| 		// Clear back log
 | |
| 		writeBackLogIdx[i] = -1;
 | |
| 	}
 | |
| }
 | |
| 
 | |
| // This function is being called in the main op after all input regs were read
 | |
| // and before it writes into any regs. This way we can always use bitwise or to
 | |
| // apply the ext command output, because if the main op didn't change the value
 | |
| // then 0 | ext output = ext output and if it did then bitwise or is still the
 | |
| // right thing to do
 | |
| void zeroWriteBackLog() 
 | |
| {
 | |
| 	// always make sure to have an extra entry at the end w/ -1 to avoid
 | |
| 	// infinitive loops
 | |
| 	for (int i = 0; writeBackLogIdx[i] != -1; i++) {
 | |
| 		dsp_op_write_reg(writeBackLogIdx[i], 0);
 | |
| 	}
 | |
| }
 | |
| 
 | |
| //needed for 0x3... (at least)..., + clrl
 | |
| //ex. corner case -> 0x3060: main opcode modifies .m, and extended .l -> .l shoudnt be zeroed because of .m write...
 | |
| void zeroWriteBackLogPreserveAcc(u8 acc) 
 | |
| {
 | |
| 	for (int i = 0; writeBackLogIdx[i] != -1; i++) {
 | |
| 		
 | |
| 		// acc0
 | |
| 		if ((acc == 0) &&  
 | |
| 			((writeBackLogIdx[i] == DSP_REG_ACL0) || (writeBackLogIdx[i] == DSP_REG_ACM0) || (writeBackLogIdx[i] == DSP_REG_ACH0)))
 | |
| 			continue;
 | |
| 		
 | |
| 		// acc1
 | |
| 		if ((acc == 1) && 
 | |
| 			((writeBackLogIdx[i] == DSP_REG_ACL1) || (writeBackLogIdx[i] == DSP_REG_ACM1) || (writeBackLogIdx[i] == DSP_REG_ACH1)))
 | |
| 			continue;
 | |
| 
 | |
| 		dsp_op_write_reg(writeBackLogIdx[i], 0);
 | |
| 	}
 | |
| }
 |