mirror of
https://github.com/RaySollium99/picodrive.git
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initial import
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@2 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
parent
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341 changed files with 180839 additions and 0 deletions
648
cpu/Cyclone/Main.cpp
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648
cpu/Cyclone/Main.cpp
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#include "app.h"
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static FILE *AsmFile=NULL;
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static int CycloneVer=0x0086; // Version number of library
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int *CyJump=NULL; // Jump table
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int ms=USE_MS_SYNTAX; // If non-zero, output in Microsoft ARMASM format
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char *Narm[4]={ "b", "h","",""}; // Normal ARM Extensions for operand sizes 0,1,2
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char *Sarm[4]={"sb","sh","",""}; // Sign-extend ARM Extensions for operand sizes 0,1,2
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int Cycles; // Current cycles for opcode
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void ot(const char *format, ...)
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{
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va_list valist=NULL;
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int i, len;
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// notaz: stop me from leaving newlines in the middle of format string
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// and generating bad code
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for(i=0, len=strlen(format); i < len && format[i] != '\n'; i++);
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if(i < len-1 && format[len-1] != '\n') printf("\nWARNING: possible improper newline placement:\n%s\n", format);
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va_start(valist,format);
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if (AsmFile) vfprintf(AsmFile,format,valist);
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va_end(valist);
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}
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void ltorg()
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{
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if (ms) ot(" LTORG\n");
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else ot(" .ltorg\n");
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}
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// trashes all temp regs
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static void PrintException(int ints)
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{
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if(!ints) {
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ot(" ;@ Cause an Exception - Vector address in r0\n");
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ot(" mov r11,r0\n");
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}
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ot(";@ swap OSP <-> A7?\n");
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ot(" ldr r0,[r7,#0x44] ;@ Get SR high\n");
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ot(" tst r0,#0x20\n");
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ot(" bne no_sp_swap%i\n",ints);
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ot(";@ swap OSP and A7:\n");
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ot(" ldr r0,[r7,#0x3C] ;@ Get A7\n");
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ot(" ldr r1,[r7,#0x48] ;@ Get OSP\n");
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ot(" str r0,[r7,#0x48]\n");
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ot(" str r1,[r7,#0x3C]\n");
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ot("no_sp_swap%i%s\n",ints,ms?"":":");
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ot(" ldr r10,[r7,#0x60] ;@ Get Memory base\n");
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ot(" mov r1,r4,lsl #8\n");
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ot(" sub r1,r1,r10,lsl #8 ;@ r1 = Old PC\n");
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ot(" mov r1,r1,asr #8 ;@ push sign extended\n");
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OpPush32();
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OpPushSr(1);
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ot(" mov r0,r11\n");
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ot(";@ Read IRQ Vector:\n");
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MemHandler(0,2);
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if(ints) {
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ot(" tst r0,r0 ;@ uninitialized int vector?\n");
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ot(" moveq r0,#0x3c\n");
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ot(" moveq lr,pc\n");
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ot(" ldreq pc,[r7,#0x70] ;@ Call read32(r0) handler\n");
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}
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#if USE_CHECKPC_CALLBACK
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ot(" add r0,r0,r10 ;@ r0 = Memory Base + New PC\n");
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ot(" mov lr,pc\n");
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ot(" ldr pc,[r7,#0x64] ;@ Call checkpc()\n");
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ot(" mov r4,r0\n");
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#endif
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ot("\n");
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if(!ints) {
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ot(" ldr r0,[r7,#0x44] ;@ Get SR high\n");
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ot(" bic r0,r0,#0xd8 ;@ clear trace and unused flags\n");
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ot(" orr r0,r0,#0x20 ;@ set supervisor mode\n");
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ot(" strb r0,[r7,#0x44]\n");
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}
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}
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// Trashes r0,r1
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void CheckInterrupt(int op)
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{
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ot(";@ CheckInterrupt:\n");
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ot(" ldr r0,[r7,#0x44]\n"); // same as ldrb r0,[r7,#0x47]
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ot(" movs r0,r0,lsr #24 ;@ Get IRQ level (loading word is faster)\n");
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ot(" beq NoInts%x\n",op);
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ot(" cmp r0,#6 ;@ irq>6 ?\n");
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ot(" ldrleb r1,[r7,#0x44] ;@ Get SR high: T_S__III\n");
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ot(" andle r1,r1,#7 ;@ Get interrupt mask\n");
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ot(" cmple r0,r1 ;@ irq<=6: Is irq<=mask ?\n");
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ot(" blgt DoInterrupt\n");
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ot("NoInts%x%s\n", op,ms?"":":");
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ot("\n");
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}
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static void PrintFramework()
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{
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ot(";@ --------------------------- Framework --------------------------\n");
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if (ms) ot("CycloneRun\n");
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else ot("CycloneRun:\n");
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ot(" stmdb sp!,{r4-r11,lr}\n");
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ot(" mov r7,r0 ;@ r7 = Pointer to Cpu Context\n");
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ot(" ;@ r0-3 = Temporary registers\n");
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ot(" ldrb r9,[r7,#0x46] ;@ r9 = Flags (NZCV)\n");
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ot(" ldr r6,=JumpTab ;@ r6 = Opcode Jump table\n");
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ot(" ldr r5,[r7,#0x5c] ;@ r5 = Cycles\n");
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ot(" ldr r4,[r7,#0x40] ;@ r4 = Current PC + Memory Base\n");
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ot(" ;@ r8 = Current Opcode\n");
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ot(" ldr r0,[r7,#0x44]\n");
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ot(" mov r9,r9,lsl #28 ;@ r9 = Flags 0xf0000000, cpsr format\n");
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ot(" ;@ r10 = Source value / Memory Base\n");
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ot("\n");
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ot(";@ CheckInterrupt:\n");
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ot(" movs r0,r0,lsr #24 ;@ Get IRQ level\n"); // same as ldrb r0,[r7,#0x47]
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ot(" beq NoInts0\n");
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ot(" cmp r0,#6 ;@ irq>6 ?\n");
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ot(" ldrleb r1,[r7,#0x44] ;@ Get SR high: T_S__III\n");
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ot(" andle r1,r1,#7 ;@ Get interrupt mask\n");
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ot(" cmple r0,r1 ;@ irq<=6: Is irq<=mask ?\n");
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ot(" blgt DoInterrupt\n");
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ot(";@ Check if interrupt used up all the cycles:\n");
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ot(" subs r5,r5,#0\n");
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ot(" blt CycloneEndNoBack\n");
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ot("NoInts0%s\n", ms?"":":");
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ot("\n");
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ot(";@ Check if our processor is in stopped state and jump to opcode handler if not\n");
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ot(" ldr r0,[r7,#0x58]\n");
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ot(" ldrh r8,[r4],#2 ;@ Fetch first opcode\n");
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ot(" tst r0,r0 ;@ stopped?\n");
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ot(" bne CycloneStopped\n");
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ot(" ldr pc,[r6,r8,asl #2] ;@ Jump to opcode handler\n");
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ot("\n");
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ot("\n");
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ot(";@ We come back here after execution\n");
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ot("CycloneEnd%s\n", ms?"":":");
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ot(" sub r4,r4,#2\n");
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ot("CycloneEndNoBack%s\n", ms?"":":");
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ot(" mov r9,r9,lsr #28\n");
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ot(" str r4,[r7,#0x40] ;@ Save Current PC + Memory Base\n");
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ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");
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ot(" strb r9,[r7,#0x46] ;@ Save Flags (NZCV)\n");
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ot(" ldmia sp!,{r4-r11,pc}\n");
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ot("\n");
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ot("CycloneStopped%s\n", ms?"":":");
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ot(" mov r5,#0\n");
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ot(" str r5,[r7,#0x5C] ;@ eat all cycles\n");
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ot(" ldmia sp!,{r4-r11,pc} ;@ we are stopped, do nothing!\n");
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ot("\n");
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ltorg();
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#if COMPRESS_JUMPTABLE
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ot(";@ uncompress jump table\n");
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if (ms) ot("CycloneInit\n");
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else ot("CycloneInit:\n");
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ot(" ldr r12,=JumpTab\n");
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ot(" add r0,r12,#0xe000*4 ;@ ctrl code pointer\n");
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ot(" ldr r1,[r0,#-4]\n");
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ot(" tst r1,r1\n");
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ot(" movne pc,lr ;@ already uncompressed\n");
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ot(" add r3,r12,#0xa000*4 ;@ handler table pointer, r12=dest\n");
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ot("unc_loop%s\n", ms?"":":");
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ot(" ldrh r1,[r0],#2\n");
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ot(" and r2,r1,#0xf\n");
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ot(" bic r1,r1,#0xf\n");
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ot(" ldr r1,[r3,r1,lsr #2] ;@ r1=handler\n");
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ot(" cmp r2,#0xf\n");
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ot(" addeq r2,r2,#1 ;@ 0xf is really 0x10\n");
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ot(" tst r2,r2\n");
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ot(" ldreqh r2,[r0],#2 ;@ counter is in next word\n");
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ot(" tst r2,r2\n");
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ot(" beq unc_finish ;@ done decompressing\n");
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ot(" tst r1,r1\n");
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ot(" addeq r12,r12,r2,lsl #2 ;@ 0 handler means we should skip those bytes\n");
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ot(" beq unc_loop\n");
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ot("unc_loop_in%s\n", ms?"":":");
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ot(" subs r2,r2,#1\n");
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ot(" str r1,[r12],#4\n");
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ot(" bgt unc_loop_in\n");
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ot(" b unc_loop\n");
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ot("unc_finish%s\n", ms?"":":");
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ot(" ldr r12,=JumpTab\n");
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ot(" ;@ set a-line and f-line handlers\n");
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ot(" add r0,r12,#0xa000*4\n");
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ot(" ldr r1,[r0,#4] ;@ a-line handler\n");
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ot(" ldr r3,[r0,#8] ;@ f-line handler\n");
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ot(" mov r2,#0x1000\n");
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ot("unc_fill3%s\n", ms?"":":");
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ot(" subs r2,r2,#1\n");
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ot(" str r1,[r0],#4\n");
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ot(" bgt unc_fill3\n");
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ot(" add r0,r12,#0xf000*4\n");
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ot(" mov r2,#0x1000\n");
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ot("unc_fill4%s\n", ms?"":":");
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ot(" subs r2,r2,#1\n");
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ot(" str r3,[r0],#4\n");
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ot(" bgt unc_fill4\n");
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ot(" bx lr\n");
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ltorg();
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ot("\n");
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#else
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ot(";@ do nothing\n");
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if (ms) ot("CycloneInit\n");
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else ot("CycloneInit:\n");
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ot(" bx lr\n");
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ot("\n");
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#endif
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if (ms) ot("CycloneSetSr\n");
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else ot("CycloneSetSr:\n");
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ot(" mov r2,r1,lsr #8\n");
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ot(" ldrb r3,[r0,#0x44] ;@ get SR high\n");
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ot(" eor r3,r3,r2\n");
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ot(" tst r3,#0x20\n");
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ot(" and r2,r2,#0xa7 ;@ only nonzero bits\n");
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ot(" strb r2,[r0,#0x44] ;@ set SR high\n");
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ot(" bne setsr_noswap\n");
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ot(" ldr r2,[r0,#0x3C] ;@ Get A7\n");
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ot(" ldr r3,[r0,#0x48] ;@ Get OSP\n");
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ot(" str r3,[r0,#0x3C]\n");
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ot(" str r2,[r0,#0x48]\n");
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ot("setsr_noswap%s\n",ms?"":":");
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ot(" mov r2,r1,lsr #3\n");
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ot(" strb r2,[r0,#0x45] ;@ the X flag\n");
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ot(" bic r2,r1,#0xf3\n");
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ot(" tst r1,#1\n");
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ot(" orrne r2,r2,#2\n");
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ot(" tst r1,#2\n");
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ot(" orrne r2,r2,#1\n");
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ot(" strb r2,[r0,#0x46] ;@ flags\n");
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ot(" bx lr\n");
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ot("\n");
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if (ms) ot("CycloneGetSr\n");
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else ot("CycloneGetSr:\n");
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ot(" ldrb r1,[r0,#0x46] ;@ flags\n");
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ot(" bic r2,r1,#0xf3\n");
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ot(" tst r1,#1\n");
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ot(" orrne r2,r2,#2\n");
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ot(" tst r1,#2\n");
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ot(" orrne r2,r2,#1\n");
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ot(" ldrb r1,[r0,#0x45] ;@ the X flag\n");
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ot(" tst r1,#2\n");
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ot(" orrne r2,r2,#0x10\n");
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ot(" ldrb r1,[r0,#0x44] ;@ the SR high\n");
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ot(" orr r0,r2,r1,lsl #8\n");
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ot(" bx lr\n");
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ot("\n");
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ot(";@ DoInterrupt - r0=IRQ number\n");
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ot("DoInterrupt%s\n", ms?"":":");
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ot(" stmdb sp!,{lr} ;@ Push ARM return address\n");
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ot(";@ Get IRQ Vector address:\n");
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ot(" mov r0,r0,asl #2\n");
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ot(" add r11,r0,#0x60\n");
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PrintException(1);
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ot(" ldrb r0,[r7,#0x47] ;@ IRQ\n");
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ot(" mov r2,#0\n");
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ot(" orr r1,r0,#0x20 ;@ Supervisor mode + IRQ number\n");
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ot(" strb r1,[r7,#0x44] ;@ Put SR high\n");
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ot(";@ Clear stopped states:\n");
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ot(" str r2,[r7,#0x58]\n");
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ot(" sub r5,r5,#%d ;@ Subtract cycles\n",44);
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ot("\n");
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#if USE_INT_ACK_CALLBACK
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#if INT_ACK_NEEDS_STUFF
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ot(" str r4,[r7,#0x40] ;@ Save PC\n");
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ot(" mov r1,r9,lsr #28\n");
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ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");
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ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");
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#endif
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ot(" ldr r11,[r7,#0x8c] ;@ IrqCallback\n");
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ot(" tst r11,r11\n");
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ot(" movne lr,pc\n");
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ot(" movne pc,r11 ;@ call IrqCallback if it is defined\n");
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#if INT_ACK_CHANGES_STUFF
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ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");
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ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");
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ot(" mov r9,r9,lsl #28\n");
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ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");
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#endif
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#else // not USE_INT_ACK_CALLBACK
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ot(";@ Clear irq:\n");
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ot(" strb r1,[r7,#0x47]\n");
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#endif
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ot(" ldmia sp!,{pc} ;@ Return\n");
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ot("\n");
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ot("Exception%s\n", ms?"":":");
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ot("\n");
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ot(" stmdb sp!,{lr} ;@ Preserve ARM return address\n");
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PrintException(0);
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ot(" ldmia sp!,{pc} ;@ Return\n");
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ot("\n");
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}
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// ---------------------------------------------------------------------------
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// Call Read(r0), Write(r0,r1) or Fetch(r0)
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// Trashes r0-r3,r12,lr
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int MemHandler(int type,int size)
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{
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int func=0;
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func=0x68+type*0xc+(size<<2); // Find correct offset
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#if MEMHANDLERS_NEED_PC
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ot(" str r4,[r7,#0x40] ;@ Save PC\n");
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#endif
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#if MEMHANDLERS_NEED_FLAGS
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ot(" mov r3,r9,lsr #28\n");
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ot(" strb r3,[r7,#0x46] ;@ Save Flags (NZCV)\n");
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#endif
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#if MEMHANDLERS_NEED_CYCLES
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ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");
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#endif
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ot(" mov lr,pc\n");
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ot(" ldr pc,[r7,#0x%x] ;@ Call ",func);
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// Document what we are calling:
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if (type==0) ot("read");
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if (type==1) ot("write");
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if (type==2) ot("fetch");
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if (type==1) ot("%d(r0,r1)",8<<size);
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else ot("%d(r0)", 8<<size);
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ot(" handler\n");
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#if MEMHANDLERS_CHANGE_CYCLES
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ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");
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#endif
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#if MEMHANDLERS_CHANGE_FLAGS
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ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");
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ot(" mov r9,r9,lsl #28\n");
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#endif
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#if MEMHANDLERS_CHANGE_PC
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ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");
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#endif
|
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|
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return 0;
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}
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|
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static void PrintOpcodes()
|
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{
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int op=0;
|
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|
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printf("Creating Opcodes: [");
|
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ot(";@ ---------------------------- Opcodes ---------------------------\n");
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// Emit null opcode:
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ot("Op____%s ;@ Called if an opcode is not recognised\n", ms?"":":");
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ot(" sub r4,r4,#2\n");
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#if USE_UNRECOGNIZED_CALLBACK
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ot(" str r4,[r7,#0x40] ;@ Save PC\n");
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ot(" mov r1,r9,lsr #28\n");
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ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");
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ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");
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ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");
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ot(" tst r11,r11\n");
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ot(" movne lr,pc\n");
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ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");
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ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");
|
||||
ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");
|
||||
ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");
|
||||
ot(" mov r9,r9,lsl #28\n");
|
||||
ot(" tst r0,r0\n");
|
||||
ot(" moveq r0,#0x10\n");
|
||||
ot(" bleq Exception\n");
|
||||
#else
|
||||
ot(" mov r0,#0x10\n");
|
||||
ot(" bl Exception\n");
|
||||
#endif
|
||||
Cycles=34;
|
||||
OpEnd();
|
||||
|
||||
// Unrecognised a-line and f-line opcodes throw an exception:
|
||||
ot("Op__al%s ;@ Unrecognised a-line opcode\n", ms?"":":");
|
||||
ot(" sub r4,r4,#2\n");
|
||||
#if USE_AFLINE_CALLBACK
|
||||
ot(" str r4,[r7,#0x40] ;@ Save PC\n");
|
||||
ot(" mov r1,r9,lsr #28\n");
|
||||
ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");
|
||||
ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");
|
||||
ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");
|
||||
ot(" tst r11,r11\n");
|
||||
ot(" movne lr,pc\n");
|
||||
ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");
|
||||
ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");
|
||||
ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");
|
||||
ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");
|
||||
ot(" mov r9,r9,lsl #28\n");
|
||||
ot(" tst r0,r0\n");
|
||||
ot(" moveq r0,#0x28\n");
|
||||
ot(" bleq Exception\n");
|
||||
#else
|
||||
ot(" mov r0,#0x28\n");
|
||||
ot(" bl Exception\n");
|
||||
#endif
|
||||
Cycles=4;
|
||||
OpEnd();
|
||||
|
||||
ot("Op__fl%s ;@ Unrecognised f-line opcode\n", ms?"":":");
|
||||
ot(" sub r4,r4,#2\n");
|
||||
#if USE_AFLINE_CALLBACK
|
||||
ot(" str r4,[r7,#0x40] ;@ Save PC\n");
|
||||
ot(" mov r1,r9,lsr #28\n");
|
||||
ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");
|
||||
ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");
|
||||
ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");
|
||||
ot(" tst r11,r11\n");
|
||||
ot(" movne lr,pc\n");
|
||||
ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");
|
||||
ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");
|
||||
ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");
|
||||
ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");
|
||||
ot(" mov r9,r9,lsl #28\n");
|
||||
ot(" tst r0,r0\n");
|
||||
ot(" moveq r0,#0x2c\n");
|
||||
ot(" bleq Exception\n");
|
||||
#else
|
||||
ot(" mov r0,#0x2c\n");
|
||||
ot(" bl Exception\n");
|
||||
#endif
|
||||
Cycles=4;
|
||||
OpEnd();
|
||||
|
||||
|
||||
for (op=0;op<0x10000;op++)
|
||||
{
|
||||
if ((op&0xfff)==0) { printf("%x",op>>12); fflush(stdout); } // Update progress
|
||||
|
||||
OpAny(op);
|
||||
}
|
||||
|
||||
ot("\n");
|
||||
|
||||
printf("]\n");
|
||||
}
|
||||
|
||||
// helper
|
||||
static void ott(const char *str, int par, const char *nl, int nlp, int counter, int size)
|
||||
{
|
||||
switch(size) {
|
||||
case 0: if((counter&7)==0) ot(ms?" dcb ":" .byte "); break;
|
||||
case 1: if((counter&7)==0) ot(ms?" dcw ":" .hword "); break;
|
||||
case 2: if((counter&7)==0) ot(ms?" dcd ":" .long "); break;
|
||||
}
|
||||
ot(str, par);
|
||||
if((counter&7)==7) ot(nl,nlp); else ot(",");
|
||||
}
|
||||
|
||||
static void PrintJumpTable()
|
||||
{
|
||||
int i=0,op=0,len=0;
|
||||
|
||||
ot(";@ -------------------------- Jump Table --------------------------\n");
|
||||
|
||||
#if COMPRESS_JUMPTABLE
|
||||
int handlers=0,reps=0,*indexes,ip,u,out;
|
||||
// use some weird compression on the jump table
|
||||
indexes=(int *)malloc(0x10000*4);
|
||||
if(!indexes) { printf("ERROR: out of memory\n"); exit(1); }
|
||||
len=0x10000;
|
||||
|
||||
// space for decompressed table
|
||||
ot(ms?" area |.data|, data\n":" .data\n .align 4\n\n");
|
||||
|
||||
ot("JumpTab%s\n", ms?"":":");
|
||||
if(ms) {
|
||||
for(i = 0; i < 0xa000/8; i++)
|
||||
ot(" dcd 0,0,0,0,0,0,0,0\n");
|
||||
} else
|
||||
ot(" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", 0xa000/8);
|
||||
|
||||
// hanlers live in "a-line" part of the table
|
||||
// first output nop,a-line,f-line handlers
|
||||
ot(ms?" dcd Op____,Op__al,Op__fl,":" .long Op____,Op__al,Op__fl,");
|
||||
handlers=3;
|
||||
|
||||
for(i=0;i<len;i++)
|
||||
{
|
||||
op=CyJump[i];
|
||||
|
||||
for(u=i-1; u>=0; u--) if(op == CyJump[u]) break; // already done with this op?
|
||||
if(u==-1 && op >= 0) {
|
||||
ott("Op%.4x",op," ;@ %.4x\n",i,handlers,2);
|
||||
indexes[op] = handlers;
|
||||
handlers++;
|
||||
}
|
||||
}
|
||||
if(handlers&7) {
|
||||
fseek(AsmFile, -1, SEEK_CUR); // remove last comma
|
||||
for(i = 8-(handlers&7); i > 0; i--)
|
||||
ot(",000000");
|
||||
ot("\n");
|
||||
}
|
||||
if(ms) {
|
||||
for(i = (0x4000-handlers)/8; i > 0; i--)
|
||||
ot(" dcd 0,0,0,0,0,0,0,0\n");
|
||||
} else {
|
||||
ot(ms?"":" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", (0x4000-handlers)/8);
|
||||
}
|
||||
printf("total distinct hanlers: %i\n",handlers);
|
||||
// output data
|
||||
for(i=0,ip=0; i < 0xf000; i++, ip++) {
|
||||
op=CyJump[i];
|
||||
if(op == -2) {
|
||||
// it must skip a-line area, because we keep our data there
|
||||
ott("0x%.4x", handlers<<4, "\n",0,ip++,1);
|
||||
ott("0x%.4x", 0x1000, "\n",0,ip,1);
|
||||
i+=0xfff;
|
||||
continue;
|
||||
}
|
||||
for(reps=1; i < 0xf000; i++, reps++) if(op != CyJump[i+1]) break;
|
||||
if(op>=0) out=indexes[op]<<4; else out=0; // unrecognised
|
||||
if(reps <= 0xe || reps==0x10) {
|
||||
if(reps!=0x10) out|=reps; else out|=0xf; // 0xf means 0x10 (0xf appeared to be unused anyway)
|
||||
ott("0x%.4x", out, "\n",0,ip,1);
|
||||
} else {
|
||||
ott("0x%.4x", out, "\n",0,ip++,1);
|
||||
ott("0x%.4x", reps,"\n",0,ip,1);
|
||||
}
|
||||
}
|
||||
if(ip&1) ott("0x%.4x", 0, "\n",0,ip++,1);
|
||||
if(ip&7) fseek(AsmFile, -1, SEEK_CUR); // remove last comma
|
||||
ot("\n");
|
||||
if(ip&7) {
|
||||
for(i = 8-(ip&7); i > 0; i--)
|
||||
ot(",0x0000");
|
||||
ot("\n");
|
||||
}
|
||||
if(ms) {
|
||||
for(i = (0x2000-ip/2)/8+1; i > 0; i--)
|
||||
ot(" dcd 0,0,0,0,0,0,0,0\n");
|
||||
} else {
|
||||
ot(" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", (0x2000-ip/2)/8+1);
|
||||
}
|
||||
ot("\n");
|
||||
free(indexes);
|
||||
#else
|
||||
ot("JumpTab%s\n", ms?"":":");
|
||||
len=0xfffe; // Hmmm, armasm 2.50.8684 messes up with a 0x10000 long jump table
|
||||
// notaz: same thing with GNU as 2.9-psion-98r2 (reloc overflow)
|
||||
// this is due to COFF objects using only 2 bytes for reloc count
|
||||
|
||||
for (i=0;i<len;i++)
|
||||
{
|
||||
op=CyJump[i];
|
||||
|
||||
if(op>=0) ott("Op%.4x",op," ;@ %.4x\n",i-7,i,2);
|
||||
else if(op==-2) ott("Op__al",0, " ;@ %.4x\n",i-7,i,2);
|
||||
else if(op==-3) ott("Op__fl",0, " ;@ %.4x\n",i-7,i,2);
|
||||
else ott("Op____",0, " ;@ %.4x\n",i-7,i,2);
|
||||
}
|
||||
if(i&7) fseek(AsmFile, -1, SEEK_CUR); // remove last comma
|
||||
|
||||
ot("\n");
|
||||
ot(";@ notaz: we don't want to crash if we run into those 2 missing opcodes\n");
|
||||
ot(";@ so we leave this pattern to patch it later\n");
|
||||
ot("%s 0x78563412\n", ms?" dcd":" .long");
|
||||
ot("%s 0x56341290\n", ms?" dcd":" .long");
|
||||
#endif
|
||||
}
|
||||
|
||||
static int CycloneMake()
|
||||
{
|
||||
int i;
|
||||
char *name="Cyclone.s";
|
||||
|
||||
// Open the assembly file
|
||||
if (ms) name="Cyclone.asm";
|
||||
AsmFile=fopen(name,"wt"); if (AsmFile==NULL) return 1;
|
||||
|
||||
printf("Making %s...\n",name);
|
||||
|
||||
ot("\n;@ Dave's Cyclone 68000 Emulator v%x.%.3x - Assembler Output\n\n",CycloneVer>>12,CycloneVer&0xfff);
|
||||
|
||||
ot(";@ (c) Copyright 2003 Dave, All rights reserved.\n");
|
||||
ot(";@ some code (c) Copyright 2005-2006 notaz, All rights reserved.\n");
|
||||
ot(";@ Cyclone 68000 is free for non-commercial use.\n\n");
|
||||
ot(";@ For commercial use, separate licencing terms must be obtained.\n\n");
|
||||
|
||||
CyJump=(int *)malloc(0x40000); if (CyJump==NULL) return 1;
|
||||
memset(CyJump,0xff,0x40000); // Init to -1
|
||||
for(i=0xa000; i<0xb000; i++) CyJump[i] = -2; // a-line emulation
|
||||
for(i=0xf000; i<0x10000; i++) CyJump[i] = -3; // f-line emulation
|
||||
|
||||
if (ms)
|
||||
{
|
||||
ot(" area |.text|, code\n");
|
||||
ot(" export CycloneInit\n");
|
||||
ot(" export CycloneRun\n");
|
||||
ot(" export CycloneSetSr\n");
|
||||
ot(" export CycloneGetSr\n");
|
||||
ot(" export CycloneVer\n");
|
||||
ot("\n");
|
||||
ot("CycloneVer dcd 0x%.4x\n",CycloneVer);
|
||||
}
|
||||
else
|
||||
{
|
||||
ot(" .global CycloneInit\n");
|
||||
ot(" .global CycloneRun\n");
|
||||
ot(" .global CycloneSetSr\n");
|
||||
ot(" .global CycloneGetSr\n");
|
||||
ot(" .global CycloneVer\n");
|
||||
ot("CycloneVer: .long 0x%.4x\n",CycloneVer);
|
||||
}
|
||||
ot("\n");
|
||||
|
||||
PrintFramework();
|
||||
PrintOpcodes();
|
||||
PrintJumpTable();
|
||||
|
||||
if (ms) ot(" END\n");
|
||||
|
||||
fclose(AsmFile); AsmFile=NULL;
|
||||
|
||||
#if 0
|
||||
printf("Assembling...\n");
|
||||
// Assemble the file
|
||||
if (ms) system("armasm Cyclone.asm");
|
||||
else system("as -o Cyclone.o Cyclone.s");
|
||||
printf("Done!\n\n");
|
||||
#endif
|
||||
|
||||
free(CyJump);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
printf("\n Dave's Cyclone 68000 Emulator v%x.%.3x - Core Creator\n\n",CycloneVer>>12,CycloneVer&0xfff);
|
||||
|
||||
// Make GAS or ARMASM version
|
||||
CycloneMake();
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue