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root/cebix/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
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Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.48 by gbeauche, 2004-06-26T15:26:18Z vs.
Revision 1.51 by gbeauche, 2004-07-11T08:12:21Z

# Line 105 | Line 105 | const uint32 POWERPC_EXEC_RETURN = POWER
105   // Interrupts in native mode?
106   #define INTERRUPTS_IN_NATIVE_MODE 1
107  
108 – // Enable native EMUL_OPs to be run without a mode switch
109 – #define ENABLE_NATIVE_EMUL_OP 1
110 –
108   // Pointer to Kernel Data
109   static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE;
110  
# Line 142 | Line 139 | class sheepshaver_cpu
139          void init_decoder();
140          void execute_sheep(uint32 opcode);
141  
145 –        // Filter out EMUL_OP routines that only call native code
146 –        bool filter_execute_emul_op(uint32 emul_op);
147 –
148 –        // "Native" EMUL_OP routines
149 –        void execute_emul_op_microseconds();
150 –        void execute_emul_op_idle_time_1();
151 –        void execute_emul_op_idle_time_2();
152 –
142          // CPU context to preserve on interrupt
143          class interrupt_context {
144                  uint32 gpr[32];
# Line 274 | Line 263 | typedef bit_field< 19, 19 > FN_field;
263   typedef bit_field< 20, 25 > NATIVE_OP_field;
264   typedef bit_field< 26, 31 > EMUL_OP_field;
265  
277 – // "Native" EMUL_OP routines
278 – #define GPR_A(REG) gpr(16 + (REG))
279 – #define GPR_D(REG) gpr( 8 + (REG))
280 –
281 – void sheepshaver_cpu::execute_emul_op_microseconds()
282 – {
283 –        Microseconds(GPR_A(0), GPR_D(0));
284 – }
285 –
286 – void sheepshaver_cpu::execute_emul_op_idle_time_1()
287 – {
288 –        // Sleep if no events pending
289 –        if (ReadMacInt32(0x14c) == 0)
290 –                Delay_usec(16667);
291 –        GPR_A(0) = ReadMacInt32(0x2b6);
292 – }
293 –
294 – void sheepshaver_cpu::execute_emul_op_idle_time_2()
295 – {
296 –        // Sleep if no events pending
297 –        if (ReadMacInt32(0x14c) == 0)
298 –                Delay_usec(16667);
299 –        GPR_D(0) = (uint32)-2;
300 – }
301 –
302 – // Filter out EMUL_OP routines that only call native code
303 – bool sheepshaver_cpu::filter_execute_emul_op(uint32 emul_op)
304 – {
305 –        switch (emul_op) {
306 –        case OP_MICROSECONDS:
307 –                execute_emul_op_microseconds();
308 –                return true;
309 –        case OP_IDLE_TIME:
310 –                execute_emul_op_idle_time_1();
311 –                return true;
312 –        case OP_IDLE_TIME_2:
313 –                execute_emul_op_idle_time_2();
314 –                return true;
315 –        }
316 –        return false;
317 – }
318 –
266   // Execute EMUL_OP routine
267   void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
268   {
322 – #if ENABLE_NATIVE_EMUL_OP
323 –        // First, filter out EMUL_OPs that can be executed without a mode switch
324 –        if (filter_execute_emul_op(emul_op))
325 –                return;
326 – #endif
327 –
269          M68kRegisters r68;
270          WriteMacInt32(XLM_68K_R25, gpr(25));
271          WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
# Line 506 | Line 447 | int sheepshaver_cpu::compile1(codegen_co
447  
448          default: {      // EMUL_OP
449                  uint32 emul_op = EMUL_OP_field::extract(opcode) - 3;
509 – #if ENABLE_NATIVE_EMUL_OP
510 –                typedef void (*emul_op_func_t)(dyngen_cpu_base);
511 –                emul_op_func_t emul_op_func = 0;
512 –                switch (emul_op) {
513 –                case OP_MICROSECONDS:
514 –                        emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_microseconds).ptr();
515 –                        break;
516 –                case OP_IDLE_TIME:
517 –                        emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_idle_time_1).ptr();
518 –                        break;
519 –                case OP_IDLE_TIME_2:
520 –                        emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_idle_time_2).ptr();
521 –                        break;
522 –                }
523 –                if (emul_op_func) {
524 –                        dg.gen_invoke_CPU(emul_op_func);
525 –                        cg_context.done_compile = false;
526 –                        status = COMPILE_CODE_OK;
527 –                        break;
528 –                }
529 – #endif
450   #if PPC_REENTRANT_JIT
451                  // Try to execute EmulOp trampoline
452                  dg.gen_set_PC_im(cg_context.pc + 4);

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