// Generate a function body.
//
void GenerateFunction(SYM *sym, Statement *stmt)
{
char buf[20];
char *bl;
int cnt, nn;
AMODE *ap;
ENODE *ep;
SYM *sp;
std::string vep;
throwlab = retlab = contlab = breaklab = -1;
lastsph = 0;
memset(semaphores,0,sizeof(semaphores));
throwlab = nextlabel++;
retlab = nextlabel++;
while( lc_auto & 7 ) /* round frame size to word */
++lc_auto;
if (sym->IsInterrupt) {
//GenerateTriadic(op_subui,0,makereg(30),makereg(30),make_immed(30*8));
//GenerateDiadic(op_sm,0,make_indirect(30), make_mask(0x9FFFFFFE));
}
if (sym->prolog) {
if (optimize)
opt1(sym->prolog);
GenerateStatement(sym->prolog);
}
if (!sym->IsNocall) {
GenerateTriadic(op_addui,0,makereg(regSP),makereg(regSP),make_immed(-GetReturnBlockSize()));
if (lc_auto || sym->NumParms > 0) {
GenerateDiadic(op_sw,0,makereg(regBP),make_indirect(regSP));
}
// if (sym->UsesPredicate)
GenerateDiadic(op_sws, 0, make_string("pregs"), make_indexed(24,regSP));
GenerateDiadic(op_sw, 0, makereg(regCLP),make_indexed(32,regSP));
// For a leaf routine don't bother to store the link register or exception link register.
// Since virtual functions call other functions, they can't be leaf
// routines.
if (!sym->IsLeaf || sym->IsVirtual) {
if (exceptions) {
GenerateDiadic(op_sws, 0, makebreg(regXLR), make_indexed(8,regSP));
}
GenerateDiadic(op_sws, 0, makebreg(regLR), make_indexed(16,regSP));
if (exceptions) {
ep = allocEnode();
ep->nodetype = en_clabcon;
ep->i = throwlab;
ap = allocAmode();
ap->mode = am_immed;
ap->offset = ep;
GenerateDiadic(op_ldis,0, makebreg(regXLR), ap);
}
}
GenerateDiadic(op_lw,0,makereg(regCLP),make_indexed(GetReturnBlockSize(),regSP));
vep = *sym->mangledName;
vep += "_VEP";
GenerateMonadic(op_fnname,0,make_string((char *)vep.c_str()));
// Generate switch to call derived methods
if (sym->IsVirtual || sym->derivitives) {
char buf[20];
char *buf2;
DerivedMethod *mthd;
dfs.printf("VirtualFunction Switch");
GenerateDiadic(op_lcu,0,makereg(24),make_indirect(regCLP));
mthd = sym->derivitives;
while (mthd) {
sprintf(buf, "p%d", 7);
buf2 = my_strdup(buf);
GenerateTriadic(op_cmpi,0,make_string(buf2),makereg(24),make_immed(mthd->typeno));
vep = *(mthd->name);
vep += "_VEP"; // Virtual Entry Point
GeneratePredicatedMonadic(7,PredOp(op_eq),op_jmp,0,
make_string((char *)vep.c_str())); // jump to the method
mthd = mthd->next;
}
}
if (lc_auto || sym->NumParms > 0) {
GenerateDiadic(op_mov,0,makereg(regBP),makereg(regSP));
if (lc_auto)
GenerateTriadic(op_addui,0,makereg(regSP),makereg(regSP),make_immed(-lc_auto));
}
// Save registers used as register variables.
// **** Done in Analyze.c ****
//if( save_mask != 0 ) {
// GenerateTriadic(op_subui,0,makereg(SP),makereg(SP),make_immed(popcnt(save_mask)*8));
// cnt = (bitsset(save_mask)-1)*8;
// for (nn = 31; nn >=1 ; nn--) {
// if (save_mask & (1 << nn)) {
// GenerateTriadic(op_sw,0,makereg(nn),make_indexed(cnt,SP),NULL);
// cnt -= 8;
// }
// }
//}
}
if (optimize)
sym->NumRegisterVars = opt1(stmt);
GenerateStatement(stmt);
GenerateEpilog(sym);
// Generate code for the hidden default catch
if (exceptions) {
if (sym->IsLeaf){
if (sym->DoesThrow) {
GenerateLabel(throwlab);
ap = GetTempRegister();
GenerateDiadic(op_mfspr,0,ap,makebreg(regXLR));
GenerateDiadic(op_mtspr,0,makebreg(regLR),ap);
ReleaseTempRegister(ap);
GenerateMonadic(op_br,0,make_clabel(retlab)); // goto regular return cleanup code
}
}
else {
GenerateLabel(throwlab);
GenerateDiadic(op_lws,0,makebreg(regLR),make_indexed(8,regBP)); // load throw return address from stack into LR
GenerateDiadic(op_sws,0,makebreg(regLR),make_indexed(16,regBP)); // and store it back (so it can be loaded with the lm)
GenerateMonadic(op_br,0,make_clabel(retlab)); // goto regular return cleanup code
}
}
}
static struct membuf *GenerateLuaFile(const char *asp_path,
const char *lua_path, char **error_message)
{
FILE *fp;
struct stat asp_file_stat;
const char *asp_content;
const char *asp_content_begin_ptr;
struct membuf *lua_content;
size_t estimated_size;
int lua_fd = -1;
struct ParserData parser_data;
if (error_message)
*error_message = NULL;
fp = fopen(asp_path, "rt");
if (fp == NULL) {
if (error_message)
*error_message = strdup(strerror(errno));
return NULL;
}
fstat(_fileno(fp), &asp_file_stat);
asp_content = (const char *)mmap(NULL, asp_file_stat.st_size, PROT_READ,
MAP_PRIVATE, _fileno(fp), 0);
if (asp_content == NULL) {
if (error_message)
*error_message = strdup("mmap failed.");
fclose(fp);
return NULL;
}
// Check for BOM and skip if present
asp_content_begin_ptr = asp_content;
if (asp_file_stat.st_size >= 3) {
if (strncmp(asp_content_begin_ptr, "\xEF\xBB\xBF", 3) == 0)
asp_content_begin_ptr += 3;
}
if (lua_path != NULL) {
FILE *lua_fp;
lua_fp = fopen(lua_path, "wt");
if (lua_fp != NULL) {
lua_fd = _dup(_fileno(lua_fp));
fclose(lua_fp);
}
}
estimated_size = asp_file_stat.st_size * 4;
lua_content = membuf_create(estimated_size, lua_fd, 0, 1);
parser_data.buf = lua_content;
parser_data.handler = WriteToBufferCallback;
GenerateProlog(parser_data.handler, &parser_data);
ParseBuffer(asp_content_begin_ptr, asp_file_stat.st_size,
ParserEventHandler, &parser_data);
GenerateEpilog(parser_data.handler, &parser_data);
munmap(asp_content, asp_file_stat.st_size);
fclose(fp);
return lua_content;
}
