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812 lines
16 KiB
C++
812 lines
16 KiB
C++
/*
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* Copyright (c) 2013, Kelvin W Sherlock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "qd.h"
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#include "toolbox.h"
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#include "sane.h"
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#include <cpu/defs.h>
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#include <cpu/CpuModule.h>
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#include <cpu/fmem.h>
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#include <stdlib.h>
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#include <string>
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#include <cmath>
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#include "stackframe.h"
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using ToolBox::Log;
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namespace SANE
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{
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// long double is an 80-bit extended with an extra 48-bits of 0 padding.
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typedef long double extended;
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template <class T>
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T readnum(uint32_t address);
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template<>
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int16_t readnum<int16_t>(uint32_t address)
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{
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return memoryReadWord(address);
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}
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template<>
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int32_t readnum<int32_t>(uint32_t address)
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{
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return memoryReadLong(address);
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}
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template<>
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float readnum<float>(uint32_t address)
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{
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static_assert(sizeof(float) == 4, "unexpected long double size");
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uint32_t x = memoryReadLong(address);
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return *((float *)&x);
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}
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template<>
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double readnum<double>(uint32_t address)
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{
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static_assert(sizeof(double) == 8, "unexpected long double size");
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uint64_t x = memoryReadLongLong(address);
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return *((double *)&x);
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}
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template<>
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long double readnum<long double>(uint32_t address)
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{
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char buffer[16];
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static_assert(sizeof(long double) == 16, "unexpected long double size");
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// read and swap 10 bytes
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// this is very much little endian.
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for (unsigned i = 0; i < 10; ++i)
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{
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buffer[9 - i] = memoryReadByte(address + i);
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}
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// remainder are 0-filled.
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for (unsigned i = 10; i < 16; ++i)
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buffer[i] = 0;
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// now cast...
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return *((long double *)buffer);
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}
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template<class T>
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void writenum(T value, uint32_t address);
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template<>
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void writenum<int16_t>(int16_t value, uint32_t address)
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{
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memoryWriteWord(value, address);
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}
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template<>
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void writenum<int32_t>(int32_t value, uint32_t address)
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{
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memoryWriteLong(value, address);
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}
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template<>
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void writenum<float>(float value, uint32_t address)
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{
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static_assert(sizeof(value) == 4, "unexpected float size");
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memoryWriteLong(*((uint32_t *)&value), address);
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}
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template<>
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void writenum<double>(double value, uint32_t address)
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{
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static_assert(sizeof(value) == 8, "unexpected double size");
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memoryWriteLongLong(*((uint64_t *)&value), address);
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}
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template<>
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void writenum<long double>(long double value, uint32_t address)
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{
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static_assert(sizeof(value) == 16, "unexpected long double size");
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char buffer[16];
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std::memcpy(buffer, &value, sizeof(value));
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// copy 10 bytes over
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// little-endian specific.
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for(unsigned i = 0; i < 10; ++i)
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memoryWriteByte(buffer[9 - i], address + i);
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}
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uint16_t fl2x()
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{
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// long to extended (80-bit fp)
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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StackFrame<10>(src, dest, op);
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Log(" FL2X(%08x, %08x, %04x)\n", src, dest, op);
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int32_t i = readnum<int32_t>(src);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(i);
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Log(" %s\n", tmp1.c_str());
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}
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writenum<extended>((extended)i, dest);
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return 0;
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}
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#if 0
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uint16_t fdivx()
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{
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// div extended (80-bit fp)
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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StackFrame<10>(src, dest, op);
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Log(" FDIVX(%08x, %08x, %04x)\n", src, dest, op);
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extended s = readnum<extended>(src);
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extended d = readnum<extended>(dest);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(d);
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std::string tmp2 = std::to_string(s);
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Log(" %s / %s\n", tmp1.c_str(), tmp2.c_str());
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}
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// dest = dest / src
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d = d / s;
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writenum<extended>((extended)d, dest);
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return 0;
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}
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uint16_t fmulx()
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{
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// multiply extended (80-bit fp)
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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StackFrame<10>(src, dest, op);
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Log(" FMULX(%08x, %08x, %04x)\n", src, dest, op);
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extended s = readnum<extended>(src);
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extended d = readnum<extended>(dest);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(d);
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std::string tmp2 = std::to_string(s);
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Log(" %s * %s\n", tmp1.c_str(), tmp2.c_str());
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}
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d = d * s;
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writenum<extended>((extended)d, dest);
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return 0;
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return 0;
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}
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#endif
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uint16_t fx2dec()
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{
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// extended (80-bit fp) to decimal
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// convert a to d based on decform f
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uint16_t op;
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uint32_t f_adr;
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uint32_t a_adr;
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uint32_t d_adr;
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StackFrame<14>(f_adr, a_adr, d_adr, op);
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Log(" FX2DEC(%08x, %08x, %08x, %04x)\n", f_adr, a_adr, d_adr, op);
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fprintf(stderr, "warning: FX2DEC not yet implemented\n");
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extended s = readnum<extended>(a_adr);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(s);
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Log(" %s\n", tmp1.c_str());
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}
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// ugh, really don't want to write this code right now.
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memoryWriteWord(0, d_adr);
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memoryWriteWord(0, d_adr + 2);
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memoryWriteWord(0, d_adr + 4);
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return 0;
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}
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template<class SrcType, class DestType = extended>
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uint16_t fadd(const char *name)
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{
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// faddi, etc.
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// destination is always extended.
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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StackFrame<10>(src, dest, op);
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Log(" %s(%08x, %08x, %04x)\n", name, src, dest, op);
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SrcType s = readnum<SrcType>(src);
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DestType d = readnum<DestType>(dest);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(d);
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std::string tmp2 = std::to_string(s);
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Log(" %s + %s\n", tmp1.c_str(), tmp2.c_str());
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}
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d = d + s;
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writenum<DestType>(d, dest);
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return 0;
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}
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template<class SrcType, class DestType = extended>
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uint16_t fsub(const char *name)
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{
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// fsub, etc.
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// destination is always extended.
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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StackFrame<10>(src, dest, op);
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Log(" %s(%08x, %08x, %04x)\n", name, src, dest, op);
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SrcType s = readnum<SrcType>(src);
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DestType d = readnum<DestType>(dest);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(d);
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std::string tmp2 = std::to_string(s);
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Log(" %s - %s\n", tmp1.c_str(), tmp2.c_str());
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}
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d = d - s;
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writenum<DestType>(d, dest);
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return 0;
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}
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template<class SrcType, class DestType = extended>
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uint16_t fmul(const char *name)
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{
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// multiply extended (80-bit fp)
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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StackFrame<10>(src, dest, op);
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Log(" %s(%08x, %08x, %04x)\n", name, src, dest, op);
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SrcType s = readnum<SrcType>(src);
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DestType d = readnum<DestType>(dest);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(d);
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std::string tmp2 = std::to_string(s);
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Log(" %s * %s\n", tmp1.c_str(), tmp2.c_str());
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}
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d = d * s;
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writenum<DestType>((extended)d, dest);
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return 0;
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}
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template<class SrcType, class DestType = extended>
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uint16_t fdiv(const char *name)
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{
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// div extended (80-bit fp)
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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StackFrame<10>(src, dest, op);
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Log(" %s(%08x, %08x, %04x)\n", name, src, dest, op);
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SrcType s = readnum<SrcType>(src);
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DestType d = readnum<DestType>(dest);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(d);
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std::string tmp2 = std::to_string(s);
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Log(" %s / %s\n", tmp1.c_str(), tmp2.c_str());
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}
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// dest = dest / src
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d = d / s;
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writenum<DestType>(d, dest);
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return 0;
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}
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template<class SrcType, class DestType>
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uint16_t fconvert(const char *name)
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{
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// type conversion.
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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StackFrame<10>(src, dest, op);
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Log(" %s(%08x, %08x, %04x)\n", name, src, dest, op);
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SrcType s = readnum<SrcType>(src);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(s);
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Log(" %s\n", tmp1.c_str());
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}
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writenum<DestType>((DestType)s, dest);
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return 0;
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}
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extern "C" void cpuSetFlagsShift(BOOLE z, BOOLE n, BOOLE c, BOOLE v);
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template<class SrcType, class DestType = extended>
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uint16_t fcmp(const char *name)
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{
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uint16_t op;
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uint32_t dest;
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uint32_t src;
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// TODO op & 0x0f == 0x08 vs 0x0a
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// for signaling unordered & NaN
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StackFrame<10>(src, dest, op);
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Log(" %s(%08x, %08x, %04x)\n", name, src, dest, op);
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SrcType s = readnum<SrcType>(src);
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DestType d = readnum<DestType>(dest);
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if (ToolBox::Trace)
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{
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std::string tmp1 = std::to_string(d);
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std::string tmp2 = std::to_string(s);
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Log(" %s <> %s\n", tmp1.c_str(), tmp2.c_str());
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}
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// TODO -- verify if src/dest are backwards here
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//
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//
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// check if ordered...
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if (d > s)
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{
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cpuSetFlagsShift(false, false, false, false);
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return 0;
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}
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if (d < s)
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{
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cpuSetFlagsShift(false, true, true, false);
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return 0;
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}
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if (d == s)
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{
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cpuSetFlagsShift(true, false, false, false);
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return 0;
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}
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// unorderable?
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// signal?
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cpuSetFlagsShift(false, false, false, true);
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return 0;
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}
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template <class DestType>
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uint16_t fdecimal(const char *name)
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{
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uint16_t op;
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uint32_t decimalPtr;
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uint32_t dest;
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StackFrame<10>(decimalPtr, dest, op);
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uint16_t sgn = memoryReadByte(decimalPtr);
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uint16_t exp = memoryReadWord(decimalPtr + 2);
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std::string sig;
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sig = ToolBox::ReadPString(decimalPtr + 4, false);
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Log(" %s({%c %s e%d}, %08x)\n",
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name,
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sgn ? '-' : ' ', sig.c_str(), exp,
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dest
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);
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extended tmp = 0;
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if (sig.length())
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{
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if (sig[0] == 'I')
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{
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tmp = INFINITY;
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}
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else if (sig[0] == 'N')
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{
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tmp = NAN; // todo -- nan type
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}
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else
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{
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tmp = stold(sig);
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while (exp > 0)
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{
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tmp = tmp * 10.0;
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exp--;
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}
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while (exp < 0)
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{
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tmp = tmp / 10.0;
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exp++;
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}
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}
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}
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if (sgn) tmp = -tmp;
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writenum<DestType>((DestType)tmp, dest);
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return 0;
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}
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extern "C" void cpuSetFlagsAbs(UWO f);
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uint16_t fp68k(uint16_t trap)
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{
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uint16_t op;
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uint32_t sp;
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sp = cpuGetAReg(7);
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op = memoryReadWord(sp);
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Log("%04x FP68K(%04x)\n", op);
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cpuSetFlagsAbs(0x4);
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if (op == 0x000b) return fx2dec();
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switch(op)
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{
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// addition
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case 0x0000: return fadd<extended>("FADDX");
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case 0x0800: return fadd<double>("FADDD");
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case 0x1000: return fadd<float>("FADDS");
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//case 0x3000: return fadd<complex>("FADDC");
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case 0x2000: return fadd<int16_t>("FADDI");
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case 0x2800: return fadd<int32_t>("FADDL");
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// subtraction
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case 0x0002: return fsub<extended>("FSUBX");
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case 0x0802: return fsub<double>("FSUBD");
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case 0x1002: return fsub<float>("FSUBS");
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//case 0x3002: return fsub<complex>("FSUBC");
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case 0x2002: return fsub<int16_t>("FSUBI");
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case 0x2802: return fsub<int32_t>("FSUBL");
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// multiplication
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case 0x0004: return fmul<extended>("FMULX");
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case 0x0804: return fmul<double>("FMULD");
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case 0x1004: return fmul<float>("FMULS");
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//case 0x3004: return fmul<complex>("FMUlC");
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case 0x2004: return fmul<int16_t>("FMULI");
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case 0x2804: return fmul<int32_t>("FMULL");
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// division
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case 0x0006: return fdiv<extended>("FDIVX");
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case 0x0806: return fdiv<double>("FDIVD");
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case 0x1006: return fdiv<float>("FDIVS");
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//case 0x3006: return fdiv<complex>("FDIVC");
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case 0x2006: return fdiv<int16_t>("FDIVI");
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case 0x2806: return fdiv<int32_t>("FDIVL");
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// comparison
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case 0x0008: return fcmp<extended>("FCMPX");
|
|
case 0x0808: return fcmp<double>("FCMPD");
|
|
case 0x1008: return fcmp<float>("FCMPS");
|
|
//case 0x3008: return fcmp<complex>("FCMPC");
|
|
case 0x2008: return fcmp<int16_t>("FCMPI");
|
|
case 0x2808: return fcmp<int32_t>("FCMPL");
|
|
|
|
case 0x000a: return fcmp<extended>("FCPXX");
|
|
case 0x080a: return fcmp<double>("FCPXD");
|
|
case 0x100a: return fcmp<float>("FCPXS");
|
|
//case 0x300a: return fcmp<complex>("FCPXC");
|
|
case 0x200a: return fcmp<int16_t>("FCPXI");
|
|
case 0x280a: return fcmp<int32_t>("FCPXL");
|
|
|
|
|
|
// conversion
|
|
case 0x000e: // 2 versions for completeness.
|
|
case 0x0010:
|
|
return fconvert<extended, extended>("FX2X");
|
|
break;
|
|
|
|
case 0x0810:
|
|
return fconvert<extended, double>("FX2D");
|
|
break;
|
|
|
|
case 0x1010:
|
|
return fconvert<extended, float>("FX2S");
|
|
break;
|
|
|
|
// 0x3010 - x to comp
|
|
case 0x2010:
|
|
return fconvert<extended, int16_t>("FX2I");
|
|
break;
|
|
|
|
case 0x2810:
|
|
return fconvert<extended, int32_t>("FX2L");
|
|
break;
|
|
|
|
case 0x080e:
|
|
return fconvert<double, extended>("FD2X");
|
|
break;
|
|
case 0x100e:
|
|
return fconvert<float, extended>("FS2X");
|
|
break;
|
|
// 0x300e - comp to x
|
|
case 0x200e:
|
|
return fconvert<int16_t, extended>("FI2X");
|
|
break;
|
|
case 0x280e:
|
|
return fconvert<int32_t, extended>("FL2X");
|
|
break;
|
|
|
|
|
|
case 0x0009:
|
|
// fdec2x
|
|
return fdecimal<extended>("FDEC2X");
|
|
break;
|
|
|
|
|
|
}
|
|
|
|
|
|
fprintf(stderr, "fp68k -- op %04x is not yet supported\n", op);
|
|
exit(1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint16_t NumToString(void)
|
|
{
|
|
/*
|
|
* on entry:
|
|
* A0 Pointer to pascal string
|
|
* D0 The number
|
|
*
|
|
* on exit:
|
|
* A0 Pointer to pascal string
|
|
* D0 Result code
|
|
*
|
|
*/
|
|
|
|
int32_t theNum = cpuGetDReg(0);
|
|
uint32_t theString = cpuGetAReg(0);
|
|
|
|
//std::string s = ToolBox::ReadPString(theString, false);
|
|
Log(" NumToString(%08x, %08x)\n", theNum, theString);
|
|
|
|
std::string s = std::to_string(theNum);
|
|
|
|
ToolBox::WritePString(theString, s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint32_t StringToNum(void)
|
|
{
|
|
/*
|
|
* on entry:
|
|
* A0 Pointer to pascal string
|
|
*
|
|
* on exit:
|
|
* D0 the number
|
|
*
|
|
*/
|
|
|
|
uint32_t theString = cpuGetAReg(0);
|
|
|
|
|
|
std::string s = ToolBox::ReadPString(theString, false);
|
|
Log(" StringToNum(%s)\n", s.c_str());
|
|
|
|
bool negative = false;
|
|
uint32_t tmp = 0;
|
|
|
|
if (!s.length()) return 0;
|
|
|
|
auto iter = s.begin();
|
|
|
|
// check for leading +-
|
|
if (*iter == '-')
|
|
{
|
|
negative = true;
|
|
++iter;
|
|
}
|
|
else if (*iter == '+')
|
|
{
|
|
negative = false;
|
|
++iter;
|
|
}
|
|
|
|
for ( ; iter != s.end(); ++iter)
|
|
{
|
|
// doesn't actually check if it's a number.
|
|
int value = *iter & 0x0f;
|
|
tmp = tmp * 10 + value;
|
|
}
|
|
|
|
if (negative) tmp = -tmp;
|
|
|
|
return tmp;
|
|
}
|
|
|
|
uint32_t fpstr2dec()
|
|
{
|
|
// void str2dec(const char *s,short *ix,decimal *d,short *vp);
|
|
|
|
#if 0
|
|
#define SIGDIGLEN 20 /* significant decimal digits */
|
|
#define DECSTROUTLEN 80 /* max length for dec2str output */
|
|
|
|
struct decimal {
|
|
char sgn; /*sign 0 for +, 1 for -*/
|
|
char unused;
|
|
short exp; /*decimal exponent*/
|
|
struct{
|
|
unsigned char length;
|
|
unsigned char text[SIGDIGLEN]; /*significant digits */
|
|
unsigned char unused;
|
|
}sig;
|
|
};
|
|
#endif
|
|
|
|
uint32_t stringPtr;
|
|
uint32_t indexPtr;
|
|
uint32_t decimalPtr;
|
|
uint32_t validPtr;
|
|
|
|
uint16_t valid;
|
|
uint16_t index;
|
|
decimal d;
|
|
|
|
StackFrame<16>(stringPtr, indexPtr, decimalPtr, validPtr);
|
|
|
|
index = memoryReadWord(indexPtr);
|
|
|
|
std::string str = ToolBox::ReadPString(stringPtr, false);
|
|
Log(" FPSTR2DEC(%s, %04x, %08x, %08x)\n",
|
|
str.c_str(), index, decimalPtr, validPtr);
|
|
|
|
index--;
|
|
str2dec(str, index, d, valid);
|
|
index++;
|
|
|
|
memoryWriteWord(index, indexPtr);
|
|
memoryWriteWord(valid, validPtr);
|
|
|
|
if (d.sig.length() > 20)
|
|
{
|
|
// truncate and adjust the exponent
|
|
// 1234e0 -> 123e1 -> 12e2 -> 1e3
|
|
// 1234e-1 -> 123e-0 -> 12e1
|
|
int over = d.sig.length() - 20;
|
|
d.sig.resize(20);
|
|
d.exp += over;
|
|
}
|
|
|
|
memoryWriteByte(d.sgn, decimalPtr);
|
|
memoryWriteByte(0, decimalPtr + 1);
|
|
memoryWriteWord(d.exp, decimalPtr + 2);
|
|
ToolBox::WritePString(decimalPtr + 4, d.sig);
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint32_t decstr68k(uint16_t trap)
|
|
{
|
|
// this is a strange one since it may be sane or it may be the binary/decimal package.
|
|
|
|
uint16_t op;
|
|
|
|
StackFrame<2>(op);
|
|
|
|
Log("%04x DECSTR68K(%04x)\n", trap, op);
|
|
|
|
switch (op)
|
|
{
|
|
case 0x00:
|
|
return NumToString();
|
|
break;
|
|
|
|
case 0x01:
|
|
return StringToNum();
|
|
break;
|
|
|
|
case 0x02:
|
|
// fpstr2dec
|
|
return fpstr2dec();
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr, "decstr68k -- op %04x is not yet supported\n", op);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
} |