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gb6
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add gb test program

This commit is contained in:
Matthew Laux 2023-10-18 18:45:03 -05:00
parent a3efa63361
commit aba7a9b847
1 changed files with 20 additions and 6 deletions
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26
src/compiler68k.c
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@ -2,6 +2,11 @@
#include <stddef.h>
#include <stdlib.h>
// A -> D0
// BC -> D1
// DE -> D2
// HL -> A0
// SP -> A7
uint8_t out_code[1024];
uint8_t memory[1024]; // ???
@ -9,23 +14,32 @@ uint32_t out_ptr;
struct basic_block {
// in 68k space?
void *start_address;
uint8_t code[256];
size_t length;
};
// need some kind of map from gb address to struct basic_block?
uint8_t test_code[] = {
0
0x00, // nop
0x18, 0xfe, // jr $-1
0xc9 // ret
};
struct basic_block *compile_block(uint16_t src_address, uint8_t *gb_code)
{
uint32_t start = out_ptr;
uint8_t instruction;
struct basic_block *bblock;
uint32_t dst_ptr = 0;
uint16_t src_ptr = 0;
bblock = malloc(sizeof *bblock);
bblock->start_address = out_code + start;
// bblock->code = out_code + start;
while (1) {
instruction = gb_code[src_ptr++];
}
return bblock;
}
@ -33,7 +47,7 @@ struct basic_block *compile_block(uint16_t src_address, uint8_t *gb_code)
void run_block(struct basic_block *bblock)
{
// calling convention? do i need to do this from asm?
uint16_t jump_target = ((uint16_t (*)()) bblock->start_address)();
uint16_t jump_target = ((uint16_t (*)()) bblock->code)();
}
// TODO
@ -55,7 +69,7 @@ int main(int argc, char *argv[])
while (1) {
uint16_t jump_target;
jump_target = ((uint16_t (*)()) bblock->start_address)();
jump_target = ((uint16_t (*)()) bblock->code)();
bblock = block_cache_get(jump_target);
if (!bblock) {