forked from dolphin-emu/dolphin
4d5eba2ec9
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4342 8ced0084-cf51-0410-be5f-012b33b47a6e
449 lines
14 KiB
C++
449 lines
14 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "DSPIntUtil.h"
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#include "DSPMemoryMap.h"
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#include "DSPIntExtOps.h"
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// Extended opcodes do not exist on their own. These opcodes can only be
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// attached to opcodes that allow extending (8 lower bits of opcode not used by
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// opcode). Extended opcodes do not modify program counter $pc register.
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// Most of the suffixes increment or decrement one or more addressing registers
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// (the first four, ARx). The increment/decrement is either 1, or the corresponding
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// "index" register (the second four, IXx). The addressing registers will wrap
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// in odd ways, dictated by the corresponding wrapping register, WP0-3.
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// The following should be applied as a decrement (and is applied by dsp_decrement_addr_reg):
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// ar[i] = (ar[i] & wp[i]) == 0 ? ar[i] | wp[i] : ar[i] - 1;
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// I have not found the corresponding algorithms for increments yet.
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// It's gotta be fairly simple though. See R3123, R3125 in Google Code.
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// (May have something to do with (ar[i] ^ wp[i]) == 0)
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namespace DSPInterpreter
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{
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namespace Ext
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{
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inline bool IsSameMemArea(u16 a, u16 b)
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{
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//LM: tested on WII
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if ((a>>10)==(b>>10))
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return true;
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else
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return false;
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}
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// DR $arR
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// xxxx xxxx 0000 01rr
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// Decrement addressing register $arR.
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void dr(const UDSPInstruction& opc) {
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writeToBackLog(0, opc.hex & 0x3, dsp_decrement_addr_reg(opc.hex & 0x3));
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}
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// IR $arR
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// xxxx xxxx 0000 10rr
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// Increment addressing register $arR.
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void ir(const UDSPInstruction& opc) {
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writeToBackLog(0, opc.hex & 0x3, dsp_increment_addr_reg(opc.hex & 0x3));
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}
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// NR $arR
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// xxxx xxxx 0000 11rr
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// Add corresponding indexing register $ixR to addressing register $arR.
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void nr(const UDSPInstruction& opc) {
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u8 reg = opc.hex & 0x3;
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writeToBackLog(0, reg, dsp_increase_addr_reg(reg, (s16)g_dsp.r[DSP_REG_IX0 + reg]));
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}
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// MV $axD, $acS.l
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// xxxx xxxx 0001 ddss
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// Move value of $acS.l to the $axD.l.
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void mv(const UDSPInstruction& opc)
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{
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u8 sreg = opc.hex & 0x3;
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u8 dreg = ((opc.hex >> 2) & 0x3);
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writeToBackLog(0, dreg + DSP_REG_AXL0, g_dsp.r[sreg + DSP_REG_ACC0]);
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}
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// S @$D, $acD.l
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// xxxx xxxx 001s s0dd
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// Store value of $(acS.l) in the memory pointed by register $D.
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// Post increment register $D.
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void s(const UDSPInstruction& opc)
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{
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u8 dreg = opc.hex & 0x3;
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u8 sreg = ((opc.hex >> 3) & 0x3) + DSP_REG_ACC0;
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dsp_dmem_write(g_dsp.r[dreg], g_dsp.r[sreg]);
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writeToBackLog(0, dreg, dsp_increment_addr_reg(dreg));
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}
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// SN @$D, $acD.l
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// xxxx xxxx 001s s1dd
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// Store value of register $acS in the memory pointed by register $D.
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// Add indexing register $ixD to register $D.
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void sn(const UDSPInstruction& opc)
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{
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u8 dreg = opc.hex & 0x3;
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u8 sreg = ((opc.hex >> 3) & 0x3) + DSP_REG_ACC0;
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dsp_dmem_write(g_dsp.r[dreg], g_dsp.r[sreg]);
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writeToBackLog(0, dreg, dsp_increase_addr_reg(dreg, (s16)g_dsp.r[DSP_REG_IX0 + dreg]));
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}
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// L axD.l, @$S
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// xxxx xxxx 01dd d0ss
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// Load $axD with value from memory pointed by register $S.
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// Post increment register $S.
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void l(const UDSPInstruction& opc)
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{
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u8 sreg = opc.hex & 0x3;
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u8 dreg = ((opc.hex >> 3) & 0x7) + DSP_REG_AXL0;
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[sreg]));
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writeToBackLog(1, sreg, dsp_increment_addr_reg(sreg));
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}
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// LN axD.l, @$S
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// xxxx xxxx 01dd d0ss
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// Load $axD with value from memory pointed by register $S.
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// Add indexing register register $ixS to register $S.
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void ln(const UDSPInstruction& opc)
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{
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u8 sreg = opc.hex & 0x3;
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u8 dreg = ((opc.hex >> 3) & 0x7) + DSP_REG_AXL0;
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[sreg]));
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writeToBackLog(1, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
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}
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// LS $axD.l, $acS.m
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// xxxx xxxx 10dd 000s
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// Load register $axD.l with value from memory pointed by register
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// $ar0. Store value from register $acS.m to memory location pointed by
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// register $ar3. Increment both $ar0 and $ar3.
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void ls(const UDSPInstruction& opc)
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{
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u8 areg = (opc.hex & 0x1) + DSP_REG_ACM0;
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u8 sreg = 0x03;
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u8 dreg = ((opc.hex >> 4) & 0x3) + DSP_REG_AXL0;
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dsp_dmem_write(g_dsp.r[sreg], g_dsp.r[areg]);
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[0x00]));
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writeToBackLog(1, sreg, dsp_increment_addr_reg(sreg));
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writeToBackLog(2, 0x00, dsp_increment_addr_reg(0x00));
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}
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// LSN $acD.l, $acS.m
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// xxxx xxxx 10dd 010s
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// Load register $acD.l with value from memory pointed by register
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// $ar0. Store value from register $acS.m to memory location pointed by
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// register $ar3. Add corresponding indexing register $ix0 to addressing
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// register $ar0 and increment $ar3.
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void lsn(const UDSPInstruction& opc)
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{
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u8 areg = (opc.hex & 0x1) + DSP_REG_ACM0;
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u8 sreg = 0x03;
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u8 dreg = ((opc.hex >> 4) & 0x3) + DSP_REG_AXL0;
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dsp_dmem_write(g_dsp.r[sreg], g_dsp.r[areg]);
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[0x00]));
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writeToBackLog(1, sreg, dsp_increment_addr_reg(sreg));
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writeToBackLog(2, 0x00,dsp_increase_addr_reg(0x00, (s16)g_dsp.r[DSP_REG_IX0]));
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}
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// LSM $acD.l, $acS.m
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// xxxx xxxx 10dd 100s
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// Load register $acD.l with value from memory pointed by register
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// $ar0. Store value from register $acS.m to memory location pointed by
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// register $ar3. Add corresponding indexing register $ix3 to addressing
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// register $ar3 and increment $ar0.
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void lsm(const UDSPInstruction& opc)
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{
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u8 areg = (opc.hex & 0x1) + DSP_REG_ACM0;
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u8 sreg = 0x03;
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u8 dreg = ((opc.hex >> 4) & 0x3) + DSP_REG_AXL0;
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dsp_dmem_write(g_dsp.r[sreg], g_dsp.r[areg]);
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[0x00]));
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writeToBackLog(1, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
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writeToBackLog(2, 0x00, dsp_increment_addr_reg(0x00));
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}
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// LSMN $acD.l, $acS.m
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// xxxx xxxx 10dd 110s
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// Load register $acD.l with value from memory pointed by register
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// $ar0. Store value from register $acS.m to memory location pointed by
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// register $ar3. Add corresponding indexing register $ix0 to addressing
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// register $ar0 and add corresponding indexing register $ix3 to addressing
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// register $ar3.
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void lsnm(const UDSPInstruction& opc)
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{
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u8 areg = (opc.hex & 0x1) + DSP_REG_ACM0;
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u8 sreg = 0x03;
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u8 dreg = ((opc.hex >> 4) & 0x3) + DSP_REG_AXL0;
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dsp_dmem_write(g_dsp.r[sreg], g_dsp.r[areg]);
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[0x00]));
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writeToBackLog(1, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
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writeToBackLog(2, 0x00, dsp_increase_addr_reg(0x00, (s16)g_dsp.r[DSP_REG_IX0]));
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}
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// SL $acS.m, $acD.l
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// xxxx xxxx 10dd 001s
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// Store value from register $acS.m to memory location pointed by register
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// $ar0. Load register $acD.l with value from memory pointed by register
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// $ar3. Increment both $ar0 and $ar3.
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void sl(const UDSPInstruction& opc)
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{
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u8 areg = (opc.hex & 0x1) + DSP_REG_ACM0;
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u8 dreg = ((opc.hex >> 4) & 0x3) + DSP_REG_AXL0;
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const u8 sreg = 0x03;
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dsp_dmem_write(g_dsp.r[0x00], g_dsp.r[areg]);
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[sreg]));
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writeToBackLog(1, sreg, dsp_increment_addr_reg(sreg));
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writeToBackLog(2, 0x00, dsp_increment_addr_reg(0x00));
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}
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// SLN $acS.m, $acD.l
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// xxxx xxxx 10dd 011s
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// Store value from register $acS.m to memory location pointed by register
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// $ar0. Load register $acD.l with value from memory pointed by register
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// $ar3. Add corresponding indexing register $ix0 to addressing register $ar0
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// and increment $ar3.
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void sln(const UDSPInstruction& opc)
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{
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u8 areg = (opc.hex & 0x1) + DSP_REG_ACM0;
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u8 dreg = ((opc.hex >> 4) & 0x3) + DSP_REG_AXL0;
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const u8 sreg = 0x03;
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dsp_dmem_write(g_dsp.r[0x00], g_dsp.r[areg]);
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[sreg]));
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writeToBackLog(1, sreg, dsp_increment_addr_reg(sreg));
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writeToBackLog(2, 0x00, dsp_increase_addr_reg(0x00, (s16)g_dsp.r[DSP_REG_IX0]));
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}
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// SLM $acS.m, $acD.l
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// xxxx xxxx 10dd 101s
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// Store value from register $acS.m to memory location pointed by register
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// $ar0. Load register $acD.l with value from memory pointed by register
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// $ar3. Add corresponding indexing register $ix3 to addressing register $ar3
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// and increment $ar0.
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void slm(const UDSPInstruction& opc)
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{
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u8 areg = (opc.hex & 0x1) + DSP_REG_ACM0;
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u8 dreg = ((opc.hex >> 4) & 0x3) + DSP_REG_AXL0;
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const u8 sreg = 0x03;
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dsp_dmem_write(g_dsp.r[0x00], g_dsp.r[areg]);
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[sreg]));
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writeToBackLog(1, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
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writeToBackLog(2, 0x00, dsp_increment_addr_reg(0x00));
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}
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// SLMN $acS.m, $acD.l
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// xxxx xxxx 10dd 111s
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// Store value from register $acS.m to memory location pointed by register
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// $ar0. Load register $acD.l with value from memory pointed by register
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// $ar3. Add corresponding indexing register $ix0 to addressing register $ar0
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// and add corresponding indexing register $ix3 to addressing register $ar3.
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void slnm(const UDSPInstruction& opc)
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{
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u8 areg = (opc.hex & 0x1) + DSP_REG_ACM0;
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u8 dreg = ((opc.hex >> 4) & 0x3) + DSP_REG_AXL0;
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const u8 sreg = 0x03;
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dsp_dmem_write(g_dsp.r[0x00], g_dsp.r[areg]);
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writeToBackLog(0, dreg, dsp_dmem_read(g_dsp.r[sreg]));
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writeToBackLog(1, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
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writeToBackLog(2, 0x00, dsp_increase_addr_reg(0x00, (s16)g_dsp.r[DSP_REG_IX0]));
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}
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// Not in duddie's doc
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// LD $ax0.d $ax1.r @$arS
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// xxxx xxxx 11dr 00ss
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void ld(const UDSPInstruction& opc)
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{
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u8 dreg = (opc.hex >> 5) & 0x1;
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u8 rreg = (opc.hex >> 4) & 0x1;
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u8 sreg = opc.hex & 0x3;
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if (sreg != 0x03) {
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writeToBackLog(0, (dreg << 1) + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[sreg]));
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if (IsSameMemArea(g_dsp.r[sreg],g_dsp.r[0x3]))
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writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[sreg]));
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else
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writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[0x3]));
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writeToBackLog(2, sreg, dsp_increment_addr_reg(sreg));
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} else {
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writeToBackLog(0, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[dreg]));
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if (IsSameMemArea(g_dsp.r[dreg],g_dsp.r[0x3]))
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writeToBackLog(1, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[dreg]));
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else
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writeToBackLog(1, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[0x3]));
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writeToBackLog(2, dreg, dsp_increment_addr_reg(dreg));
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}
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writeToBackLog(3, DSP_REG_AR3, dsp_increment_addr_reg(DSP_REG_AR3));
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}
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// Not in duddie's doc
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// LDN $ax0.d $ax1.r @$arS
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// xxxx xxxx 11dr 01ss
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void ldn(const UDSPInstruction& opc)
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{
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u8 dreg = (opc.hex >> 5) & 0x1;
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u8 rreg = (opc.hex >> 4) & 0x1;
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u8 sreg = opc.hex & 0x3;
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if (sreg != 0x03) {
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writeToBackLog(0, (dreg << 1) + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[sreg]));
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if (IsSameMemArea(g_dsp.r[sreg],g_dsp.r[0x3]))
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writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[sreg]));
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else
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writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[0x3]));
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writeToBackLog(2, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
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} else {
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writeToBackLog(0, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[dreg]));
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if (IsSameMemArea(g_dsp.r[dreg],g_dsp.r[0x3]))
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writeToBackLog(1, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[dreg]));
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else
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writeToBackLog(1, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[0x3]));
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writeToBackLog(2, dreg, dsp_increase_addr_reg(dreg, (s16)g_dsp.r[DSP_REG_IX0 + dreg]));
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}
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writeToBackLog(3, DSP_REG_AR3, dsp_increment_addr_reg(DSP_REG_AR3));
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}
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// Not in duddie's doc
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// LDM $ax0.d $ax1.r @$arS
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// xxxx xxxx 11dr 10ss
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void ldm(const UDSPInstruction& opc)
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{
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u8 dreg = (opc.hex >> 5) & 0x1;
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u8 rreg = (opc.hex >> 4) & 0x1;
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u8 sreg = opc.hex & 0x3;
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if (sreg != 0x03) {
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writeToBackLog(0, (dreg << 1) + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[sreg]));
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if (IsSameMemArea(g_dsp.r[sreg],g_dsp.r[0x3]))
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writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[sreg]));
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else
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writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[0x3]));
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writeToBackLog(2, sreg, dsp_increment_addr_reg(sreg));
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} else {
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writeToBackLog(0, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[dreg]));
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if (IsSameMemArea(g_dsp.r[dreg],g_dsp.r[0x3]))
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writeToBackLog(1, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[dreg]));
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else
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writeToBackLog(1, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[0x3]));
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|
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writeToBackLog(2, dreg, dsp_increment_addr_reg(dreg));
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}
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|
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writeToBackLog(3, DSP_REG_AR3,
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dsp_increase_addr_reg(DSP_REG_AR3, (s16)g_dsp.r[DSP_REG_IX0 + DSP_REG_AR3]));
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}
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|
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// Not in duddie's doc
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// LDNM $ax0.d $ax1.r @$arS
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// xxxx xxxx 11dr 11ss
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void ldnm(const UDSPInstruction& opc)
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|
{
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u8 dreg = (opc.hex >> 5) & 0x1;
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u8 rreg = (opc.hex >> 4) & 0x1;
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u8 sreg = opc.hex & 0x3;
|
|
|
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if (sreg != 0x03) {
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writeToBackLog(0, (dreg << 1) + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[sreg]));
|
|
|
|
if (IsSameMemArea(g_dsp.r[sreg],g_dsp.r[0x3]))
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writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[sreg]));
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else
|
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writeToBackLog(1, (rreg << 1) + DSP_REG_AXL1, dsp_dmem_read(g_dsp.r[0x3]));
|
|
|
|
writeToBackLog(2, sreg, dsp_increase_addr_reg(sreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]));
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} else {
|
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writeToBackLog(0, rreg + DSP_REG_AXL0, dsp_dmem_read(g_dsp.r[dreg]));
|
|
|
|
if (IsSameMemArea(g_dsp.r[dreg],g_dsp.r[0x3]))
|
|
writeToBackLog(1, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[dreg]));
|
|
else
|
|
writeToBackLog(1, rreg + DSP_REG_AXH0, dsp_dmem_read(g_dsp.r[0x3]));
|
|
|
|
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
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|