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emuram.cl
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emuram.cl
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/**
* emuram.cl
*
* (c) Copyright 2010, P. Jakubco
*
* KISS, YAGNI
*
*/
//#pragma OPENCL EXTENSION cl_amd_printf : enable
void print_instr(__constant uchar *program, int pc) {
// printf("%d: ", pc);
switch (program[pc]) {
case 0: // printf("\tHALT\n");
break;
case 1: // printf("\tREAD %d\n", (unsigned int) program[pc+1]);
break;
case 2: // printf("\tREAD *%d\n", (unsigned int) program[pc+1]);
break;
case 3: // printf("\tWRITE =%d\n", (unsigned int) program[pc+1]);
break;
case 4: // printf("\tWRITE %d\n", (unsigned int) program[pc+1]);
break;
case 5: // printf("\tWRITE *%d\n", (unsigned int) program[pc+1]);
break;
case 6: // printf("\tLOAD =%d\n", (unsigned int) program[pc+1]);
break;
case 7: // printf("\tLOAD %d\n", (unsigned int) program[pc+1]);
break;
case 8: // printf("\tLOAD *%d\n", (unsigned int) program[pc+1]);
break;
case 9: // printf("\tSTORE %d\n", (unsigned int) program[pc+1]);
break;
case 10: // printf("\tSTORE *%d\n", (unsigned int) program[pc+1]);
break;
case 11: // printf("\tADD =%d\n", (unsigned int) program[pc+1]);
break;
case 12: // printf("\tADD %d\n", (unsigned int) program[pc+1]);
break;
case 13: // printf("\tADD *%d\n", (unsigned int) program[pc+1]);
break;
case 14: // printf("\tSUB =%d\n", (unsigned int) program[pc+1]);
break;
case 15: // printf("\tSUB %d\n", (unsigned int) program[pc+1]);
break;
case 16: // printf("\tSUB *%d\n", (unsigned int) program[pc+1]);
break;
case 17: // printf("\tMUL =%d\n", (unsigned int) program[pc+1]);
break;
case 18: // printf("\tMUL %d\n", (unsigned int) program[pc+1]);
break;
case 19: // printf("\tMUL *%d\n", (unsigned int) program[pc+1]);
break;
case 20: // printf("\tDIV =%d\n", (unsigned int) program[pc+1]);
break;
case 21: // printf("\tDIV %d\n", (unsigned int) program[pc+1]);
break;
case 22: // printf("\tDIV *%d\n", (unsigned int) program[pc+1]);
break;
case 23: // printf("\tJMP %d\n", (unsigned int) program[pc+1]);
break;
case 24: // printf("\tJGTZ %d\n", (unsigned int) program[pc+1]);
break;
case 25: // printf("\tJZ %d\n", (unsigned int) program[pc+1]);
break;
default:
// printf("\t>> UNKNOWN INSTRUCTION <<\n");
break;
}
}
/**
* The RAM emulator - interpreter.
*
* @param program
* The RAM program binary, assuming that it is not null
* @param pc
* Program counter register.
* @param r
* Array of all RAM registers (finite, say 100 is enough).
* @param ram_size
* Size of the program in bytes, assuming ram_size > 0.
* @param status
* The status of the RAM machine.
* @param eventslist
* The list of events - requesting or satisfied.
* 0 - Input request event (0 - nothing, 1 - request, 2 - satisfied)
* 1 - Output request event (0 - nothing, 1 - request, 2 - satisfied)
* @param event_data
* Data that will be transferred when satisfying the input/output event
*/
__kernel void ramCL(__constant uchar *program, __global ushort *pc,
__global ushort *r, ushort ram_size, __global ushort *status,
__global uchar *eventslist, __global ushort *event_data) {
size_t i = get_global_id(0);
if (i > 0) return;
if (get_local_id(0) > 0) return;
int c, t;
status[0] = 0;
p_output[0] = 0;
while ((pc[0] < ram_size) && (status[0] == 0)) {
if (pc[0] >= ram_size) {
// printf("CL: Error: Address fallout.\n");
status[0] = 2;
return;
}
c = program[pc[0]++];
if ((c > 0) && (pc[0] >= ram_size)) {
// printf("CL: Error: Address fallout.\n");
status[0] = 2;
return;
}
print_instr(program, pc[0]-1);
switch (c) {
case 0: /* HALT */
status[0] = 3;
return;
case 1: /* READ i */
// test if the input event has been already satisfied
// printf("OpenCL: eventslist[0] = %d\n", eventslist[0]);
if (eventslist[0] == 2) {
r[program[pc[0]++]] = event_data[0];
eventslist[0] = 0;
// printf("OpenCL: event 0 satisfied (%d)\n", event_data[0]);
} else {
// wait for the event = return one instruction back, request event and exit
pc[0]--;
eventslist[0] = 1;
return;
}
break;
case 2: /* READ *i */
if (eventslist[0] == 2) {
r[r[program[pc[0]++]]] = event_data[0];
eventslist[0] = 0;
// printf("OpenCL: event 0 satisfied (%d)\n", event_data[0]);
} else {
pc[0]--;
eventslist[0] = 1;
return;
}
break;
case 3: /* WRITE =i */
// printf("OpenCL: eventslist[1] = %d\n", eventslist[1]);
if (eventslist[1] == 2) {
eventslist[1] = 0;
// printf("OpenCL: event 1 satisfied (%d)\n", event_data[0]);
} else {
// wait for the event = return one instruction back, request event and exit
pc[0]--;
eventslist[1] = 1;
event_data[0] = program[pc[0]++];
return;
}
break;
case 4: /* WRITE i */
// printf("OpenCL: eventslist[1] = %d\n", eventslist[1]);
if (eventslist[1] == 2) {
eventslist[1] = 0;
// printf("OpenCL: event 1 satisfied (%d)\n", event_data[0]);
} else {
// wait for the event = return one instruction back, request event and exit
pc[0]--;
eventslist[1] = 1;
event_data[0] = r[program[pc[0]++]];
return;
}
break;
case 5: /* WRITE *i */
// printf("OpenCL: eventslist[1] = %d\n", eventslist[1]);
if (eventslist[1] == 2) {
eventslist[1] = 0;
// printf("OpenCL: event 1 satisfied (%d)\n", event_data[0]);
} else {
// wait for the event = return one instruction back, request event and exit
pc[0]--;
eventslist[1] = 1;
event_data[0] = r[r[program[pc[0]++]]];
return;
}
break;
case 6: /* LOAD =i */
r[0] = program[pc[0]++];
break;
case 7: /* LOAD i */
r[0] = r[program[pc[0]++]];
break;
case 8: /* LOAD *i */
r[0] = r[r[program[pc[0]++]]];
break;
case 9: /* STORE i */
r[program[pc[0]++]] = r[0];
break;
case 10: /* STORE *i */
r[r[program[pc[0]++]]] = r[0];
break;
case 11: /* ADD =i */
r[0] += program[pc[0]++];
break;
case 12: /* ADD i */
r[0] += r[program[pc[0]++]];
break;
case 13: /* ADD *i */
r[0] += r[r[program[pc[0]++]]];
break;
case 14: /* SUB =i */
r[0] -= program[pc[0]++];
break;
case 15: /* SUB i */
r[0] -= r[program[pc[0]++]];
break;
case 16: /* SUB *i */
r[0] -= r[r[program[pc[0]++]]];
break;
case 17: /* MUL =i */
r[0] *= program[pc[0]++];
break;
case 18: /* MUL i */
r[0] *= r[program[pc[0]++]];
break;
case 19: /* MUL *i */
r[0] *= r[r[program[pc[0]++]]];
break;
case 20: /* DIV =i */
t = program[pc[0]++];
if (!t) {
// cout << \"Error: division by zero.\" << endl;
status[0] = 5;
return;
}
r[0] /= t;
break;
case 21: /* DIV i */
t = r[program[pc[0]++]];
if (!t) {
// cout << \"Error: division by zero.\" << endl;
status[0] = 5;
return;
}
r[0] /= t;
break;
case 22: /* DIV *i */
t = r[r[program[pc[0]++]]];
if (!t) {
// cout << \"Error: division by zero.\" << endl;
status[0] = 5;
return;
}
r[0] /= t;
break;
case 23: /* JMP i */
pc[0] = program[pc[0]];
break;
case 24: /* JGTZ i */
pc[0] = (r[0] > 0) ? program[pc[0]] : pc[0] + 1;
break;
case 25: /* JZ i */
pc[0] = (r[0] == 0) ? program[pc[0]] : pc[0] + 1;
break;
default:
// cout << \"Error: unknown insruction.\" << endl;
status[0] = 1;
return;
}
status[0] = 0;
}
output[p_output[0]] = 0;
if (pc[0] >= ram_size) {
// cout << \"Error: Address fallout.\" << endl;
status[0] = 2;
return;
}
}