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3549 lines (3218 loc) · 136 KB
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//
// Bytecode compiler for spin2cpp
//
// Copyright 2021-2023 Ada Gottensträter and Total Spectrum Software Inc.
// see the file COPYING for conditions of redistribution
//
#include "outbc.h"
#include "bcbuffers.h"
#include "bcir.h"
#include <stdlib.h>
#include "becommon.h"
#include <inttypes.h>
const BCContext nullcontext = {.hiddenVariables = 0};
static int getFuncIDForKnownFunc(Module *M,Function *F); // forward declaration
static void BCAddStaticReference(Module *P, AST *obj);
static AST *BCAllocaExpr(AST *siz) {
if (gl_interp_kind != INTERP_KIND_P1ROM) {
ERROR(siz, "Interpreter does not support __builtin_alloca");
return siz;
}
AST *tmp = AstIdentifier("OUTB");
AST *dcurr = AstIdentifier("__interp_dcurr");
AST *assign = AstAssign(tmp, dcurr);
AST *expr = AstOperator('+', siz, AstInteger(3));
expr = AstOperator('&', expr, AstInteger(0xfffffffc));
expr = FoldIfConst(expr);
expr = AstOpAssign('+', dcurr, expr);
expr = NewAST(AST_SEQUENCE, assign, expr);
expr = NewAST(AST_SEQUENCE, expr, tmp);
return expr;
}
static int BCGetNumResultsByType(AST *funcType) {
int n = FuncNumResults(funcType);
return (n<=1) ? 1 : n;
}
static int BCGetNumResults(Function *F) {
int n = F->numresults;
return (n<=1) ? 1 : n;
}
static int BCLocalSize(Function *F) {
return FuncLocalSize(F); // F->numlocals*LONG_SIZE;
}
static int BCGetOBJSize(Module *P,AST *ast) {
if (ast->kind == AST_LISTHOLDER) ast = ast->right;
if (ast->kind == AST_DECLARE_VAR) {
Module *mod = GetClassPtr(ast->left);
if (!mod) {
ERROR(ast,"Can't get Module in BCGetOBJSize");
return 0;
}
return mod->varsize;
} else if (ast->kind == AST_OBJECT) {
// static reference has no size
return 0;
} else ERROR(ast,"Unhandled AST Kind %d in BCGetOBJSize\n",ast->kind);
return 0;
}
static int BCGetOBJOffset(Module *P,AST *ast) {
Symbol *sym = NULL;
if (ast->kind == AST_LISTHOLDER) ast = ast->right;
if (ast->kind == AST_DECLARE_VAR) {
// FIXME this seems kindof wrong?
AST *ident = ast->right->left;
if (ident->kind == AST_ARRAYDECL) ident = ident->left;
if (ident->kind == AST_ARRAYREF) ident = ident->left;
if (ident->kind != AST_IDENTIFIER) {
ERROR(ident,"Not an identifier");
return 0;
}
const char *name = ident->d.string;
if(name) sym = LookupSymbolInTable(&P->objsyms,name);
} else if (ast->kind == AST_IDENTIFIER) {
sym = LookupAstSymbol(ast,NULL);
} else if (ast->kind == AST_OBJECT) {
// Static reference to type, must have zero offset
return 0;
} else ERROR(ast,"Unhandled AST Kind %d in BCGetOBJOffset\n",ast->kind);
if (!sym) {
ERROR(ast,"Can't find symbol for an OBJ");
return -1;
}
//printf("In BCGetOBJOffset: ");
//printf("got symbol with name %s, kind %d, offset %d\n",sym->our_name,sym->kind,sym->offset);
return sym->offset;
}
// Get offset from PBASE to DAT start
int BCgetDAToffset(Module *P, bool absolute, AST *errloc, bool printErrors) {
if (gl_output != OUTPUT_BYTECODE) {
if (printErrors) ERROR(errloc,"BCgetDAToffset called, but not in bytecode mode");
return -1;
}
if (!P->bedata) {
if (printErrors) ERROR(errloc,"BCgetDAToffset: bedata for module %s uninitialized",P->classname);
return -1;
}
int pbase_offset = -1;
switch(gl_interp_kind) {
case INTERP_KIND_P1ROM: pbase_offset = 4*(ModData(P)->pub_cnt+ModData(P)->pri_cnt+ModData(P)->obj_cnt+1); break;
default:
if (printErrors) ERROR(errloc,"Unknown interpreter kind");
return -1;
}
if (absolute) {
int compiledAddress = ModData(P)->compiledAddress;
if (compiledAddress < 0) {
if (printErrors) ERROR(errloc,"Internal error, Taking address of uncompiled module");
return -1;
}
return pbase_offset + compiledAddress;
} else return pbase_offset;
}
struct bcheaderspans {
OutputSpan *pbase,*vbase,*dbase,*pcurr,*dcurr;
};
static struct bcheaderspans
OutputSpinBCHeader(ByteOutputBuffer *bob, Module *P)
{
unsigned int clkfreq;
unsigned int clkmodeval;
struct bcheaderspans spans = {0};
if (!GetClkFreq(P, &clkfreq, &clkmodeval)) {
// use defaults
clkfreq = 80000000;
clkmodeval = 0x6f;
}
BOB_PushLong(bob, clkfreq, "CLKFREQ"); // offset 0
BOB_PushByte(bob, clkmodeval, "CLKMODE"); // offset 4
BOB_PushByte(bob, 0,"Placeholder for checksum"); // checksum
spans.pbase = BOB_PushWord(bob, 0x0010,"PBASE"); // PBASE
spans.vbase = BOB_PushWord(bob, 0x7fe8,"VBASE"); // VBASE offset 8
spans.dbase = BOB_PushWord(bob, 0x7ff0,"DBASE"); // DBASE
spans.pcurr = BOB_PushWord(bob, 0x0018,"PCURR"); // PCURR offset 12
spans.dcurr = BOB_PushWord(bob, 0x7ff8,"DCURR"); // DCURR
return spans;
}
// get HW register for extra return values
static int
HWRegRetval(int n) {
if (gl_interp_kind == INTERP_KIND_P1ROM) {
static const int reg_addr[] = { 0x1f5, 0x1f7, 0x1f3 };
if (n < 1 || n > 3) {
ERROR(NULL, "Return value index %d is out of range", n);
return 0;
}
// return index for OUTB, DIRB, INB
// these are $1f5, $1f7, $1f3 respectively
return reg_addr[n-1] - 0x1e0;
}
ERROR(NULL, "Internal error, interpreter does not need return registers");
return 0;
}
static int
HWRegVBase() {
switch(gl_interp_kind) {
case INTERP_KIND_P1ROM: {
return 0x1EC - 0x1E0;
} break;
default:
ERROR(NULL,"Unknown interpreter kind");
return 0;
}
}
static int
HWReg2Index(HwReg *reg) {
switch(gl_interp_kind) {
case INTERP_KIND_P1ROM: {
int index = reg->addr - 0x1E0;
if (index < 0 || index >= 32) {
ERROR(NULL,"Register index %d for %s out of range",index,reg->name);
return 0;
}
return index;
} break;
default:
ERROR(NULL,"Unknown interpreter kind");
return 0;
}
}
// Get math op for AST operator token
// Returns 0 if it is not a simple binary operator
static enum MathOpKind
Optoken2MathOpKind(int token,bool *unaryOut,bool *needsAbsOut) {
bool unary = false;
bool needsAbs = false;
enum MathOpKind mok = MOK_MOD_UNDEFINED;
//printf("In Optoken2MathOpKind, optoken %03X\n",token);
switch (token) {
default: return mok;
case '^': mok = MOK_BITXOR; break;
case '|': mok = MOK_BITOR; break;
case '&': mok = MOK_BITAND; break;
case '+': mok = MOK_ADD; break;
case '-': mok = MOK_SUB; break;
case '*': mok = MOK_MULLOW; break;
case K_HIGHMULT: mok = MOK_MULHIGH; break;
case '/': mok = MOK_DIVIDE; break;
case K_MODULUS: mok = MOK_REMAINDER; break;
case K_LIMITMAX: mok = MOK_MAX; break;
case K_LIMITMIN: mok = MOK_MIN; break;
case '<': mok = MOK_CMP_B; needsAbs = true; break;
case '>': mok = MOK_CMP_A; needsAbs = true; break;
case K_LE: mok = MOK_CMP_BE; needsAbs = true; break;
case K_GE: mok = MOK_CMP_AE; needsAbs = true; break;
case K_EQ: mok = MOK_CMP_E; needsAbs = true; break;
case K_NE: mok = MOK_CMP_NE; needsAbs = true; break;
case K_SHL: mok = MOK_SHL; break;
case K_SHR: mok = MOK_SHR; break;
case K_SAR: mok = MOK_SAR; break;
case K_ROTL: mok = MOK_ROL; break;
case K_ROTR: mok = MOK_ROR; break;
case K_REV: mok = MOK_REV; break;
case K_LOGIC_AND: mok = MOK_LOGICAND; break;
case K_LOGIC_OR: mok = MOK_LOGICOR; break;
case K_BOOL_NOT: mok = MOK_BOOLNOT; unary=true; break;
case K_NEGATE: mok = MOK_NEG; unary = true; break;
case K_ABS: mok = MOK_ABS; unary = true; break;
case K_SQRT: mok = MOK_SQRT; unary = true; break;
case K_DECODE: mok = MOK_DECODE; unary = true; break;
case K_ENCODE: mok = MOK_ENCODE; unary = true; break;
case K_BIT_NOT: mok = MOK_BITNOT; unary = true; break;
}
if (unaryOut) *unaryOut = unary;
if (needsAbsOut) {
needsAbs = needsAbs && curfunc && LangBoolIsOne(curfunc->language);
*needsAbsOut = needsAbs;
}
return mok;
}
ByteOpIR BCBuildString(AST *expr, int prefixLen) {
ByteOpIR ir = {0};
ir.kind = BOK_FUNDATA_STRING;
Flexbuf fb;
flexbuf_init(&fb, 32);
StringBuildBuffer(&fb, expr, prefixLen);
ir.attr.stringLength = flexbuf_curlen(&fb);
ir.data.stringPtr = flexbuf_get(&fb);
return ir;
}
#ifdef NEED_ORIG_DEBUG
static void
printASTInfo(AST *node) {
if (node) {
printf("node is %d, ",node->kind);
if (node->left) printf("left is %d, ",node->left->kind);
else printf("left empty, ");
if (node->right) printf("right is %d\n",node->right->kind);
else printf("right empty\n");
} else printf("null node");
}
#else
#define printASTInfo(node) DumpAST(node)
#endif
static void BCCompileExpression(BCIRBuffer *irbuf,AST *node,BCContext context,bool asStatement); // forward decl;
static void BCCompileStatement(BCIRBuffer *irbuf,AST *node, BCContext context); // forward decl;
static ByteOpIR*
BCNewOrphanLabel(BCContext context) {
ByteOpIR *lbl = (ByteOpIR *)calloc(sizeof(ByteOpIR),1);
lbl->kind = BOK_LABEL;
lbl->attr.labelHiddenVars = context.hiddenVariables;
return lbl;
}
static ByteOpIR*
BCPushLabel(BCIRBuffer *irbuf,BCContext context) {
ByteOpIR lbl = {.kind = BOK_LABEL,.attr.labelHiddenVars = context.hiddenVariables};
return BIRB_PushCopy(irbuf,&lbl);
}
static ByteOpIR*
BCNewNamedLabelRef(BCContext context,const char *name) {
ByteOpIR *lbl = (ByteOpIR*)calloc(sizeof(ByteOpIR),1);
lbl->kind = BOK_NAMEDLABEL;
lbl->attr.labelHiddenVars = context.hiddenVariables;
lbl->data.stringPtr = name;
return lbl;
}
static void
BCCompileInteger(BCIRBuffer *irbuf,int32_t ival) {
ByteOpIR opc = {0};
opc.kind = BOK_CONSTANT;
opc.data.int32 = ival;
BIRB_PushCopy(irbuf,&opc);
}
static void
BCCompilePushModuleFuncRef(BCIRBuffer *irbuf,Module *M,int32_t funcid)
{
ByteOpIR opc = {0};
opc.kind = BOK_CONSTANT_FUNCREF;
opc.attr.funcval.modref = M;
opc.data.int32 = funcid;
BIRB_PushCopy(irbuf,&opc);
}
static void
BCCompilePushModuleDatRef(BCIRBuffer *irbuf,Module *M,int32_t offset)
{
ByteOpIR opc = {0};
opc.kind = BOK_CONSTANT_DATREF;
opc.attr.datval.modref = M;
opc.data.int32 = offset;
BIRB_PushCopy(irbuf,&opc);
}
static void
BCCompileDatModuleFuncRef(uint8_t *where,Module *M,int32_t funcid)
{
ERROR(NULL, "Unable to put data reloc");
}
static void BCCompilePopN(BCIRBuffer *irbuf,int popcount) {
if (popcount < 0) ERROR(NULL,"Internal Error: negative pop count");
else if (popcount > 0) {
BCCompileInteger(irbuf,popcount*4);
ByteOpIR popOp = {.kind = BOK_POP};
BIRB_PushCopy(irbuf,&popOp);
}
}
static void
BCCompileJumpEx(BCIRBuffer *irbuf, ByteOpIR *label, enum ByteOpKind kind, BCContext context, int stackoffset, bool logicallyTerminal) {
int stackdiff = context.hiddenVariables - label->attr.labelHiddenVars + stackoffset; // Will be zero if we got an AST_NAMEDLABEL
if (stackdiff > 0) {
// emit pop to get rid of hidden vars
if (kind != BOK_JUMP) ERROR(NULL,"Internal Error: Compiling conditional jump to label with less hidden vars than current context");
else BCCompilePopN(irbuf,stackdiff);
} else if (stackdiff < 0) {
ERROR(NULL,"Internal Error: Compiling jump to label with more hidden vars than current context");
}
ByteOpIR condjmp = {0};
condjmp.kind = kind;
condjmp.jumpTo = label;
condjmp.attr.condjump.logicallyTerminal = logicallyTerminal;
BIRB_PushCopy(irbuf,&condjmp);
}
static void
BCCompileJump(BCIRBuffer *irbuf, ByteOpIR *label, BCContext context) {
BCCompileJumpEx(irbuf,label,BOK_JUMP,context,0,false);
}
static void
BCCompileConditionalJump(BCIRBuffer *irbuf,AST *condition, bool ifNotZero, ByteOpIR *label, BCContext context) {
ByteOpIR condjmp = {0};
condjmp.jumpTo = label;
int stackdiff = context.hiddenVariables - label->attr.labelHiddenVars;
if (stackdiff) ERROR(condition,"Conditional jump to label with unequal hidden var count");
if (condition && condition->kind == AST_EXPECT) condition = condition->left;
if (!condition) {
ERROR(NULL,"Null condition!");
return;
} else if (IsConstExpr(condition)) {
int ival = EvalConstExpr(condition);
if (!!ival == !!ifNotZero) {
condjmp.kind = BOK_JUMP; // Unconditional jump
} else return; // Impossible jump
} else if (condition->kind == AST_OPERATOR) {
int optoken = condition->d.ival;
AST *left = condition->left, *right = condition->right;
bool extrasmall = curfunc->optimize_flags & OPT_EXTRASMALL;
OptimizeOperator(&optoken,&left,&right);
if (optoken == K_BOOL_NOT) {
// Inverted jump
BCCompileConditionalJump(irbuf,right,!ifNotZero,label,context);
return;
} else if ((optoken == K_EQ || optoken == K_NE )
&& ( IsConstZero(left) || IsConstZero(right))) {
// Slightly complex condition, I know
// optimize conditions like x == 0 and x<>0
BCCompileConditionalJump(irbuf,IsConstZero(left) ? right : left,!!ifNotZero != !!(optoken == K_EQ),label,context);
return;
} else if ((optoken == K_BOOL_AND || optoken == K_BOOL_OR) && extrasmall && !ExprHasSideEffects(right)) {
goto normal_condjump; // using an AND/OR operator is smaller but slower
} else if (optoken == K_BOOL_AND && !ifNotZero) {
// like in "IF L AND R"
BCCompileConditionalJump(irbuf,left,false,label,context);
BCCompileConditionalJump(irbuf,right,false,label,context);
return;
} else if (optoken == K_BOOL_AND && ifNotZero) {
// like in "IFNOT L AND R"
ByteOpIR *skipLabel = BCNewOrphanLabel(context);
BCCompileConditionalJump(irbuf,left,false,skipLabel,context);
BCCompileConditionalJump(irbuf,right,true,label,context);
BIRB_Push(irbuf,skipLabel);
return;
} else if (optoken == K_BOOL_OR && !ifNotZero) {
// like in "IF L OR R"
ByteOpIR *skipLabel = BCNewOrphanLabel(context);
BCCompileConditionalJump(irbuf,left,true,skipLabel,context);
BCCompileConditionalJump(irbuf,right,false,label,context);
BIRB_Push(irbuf,skipLabel);
return;
} else if (optoken == K_BOOL_OR && ifNotZero) {
// like in "IFNOT L OR R"
BCCompileConditionalJump(irbuf,left,true,label,context);
BCCompileConditionalJump(irbuf,right,true,label,context);
return;
}
goto normal_condjump;
} else {
normal_condjump:
// Just normal
BCCompileExpression(irbuf,condition,context,false);
condjmp.kind = ifNotZero ? BOK_JUMP_IF_NZ : BOK_JUMP_IF_Z;
}
BIRB_PushCopy(irbuf,&condjmp);
}
enum MemOpTargetKind {
MOT_UNDEFINED,MOT_MEM,MOT_REG,MOT_REGBIT,MOT_REGBITRANGE,MOT_REGIDX
};
static void
BCCompileMemOpExEx(BCIRBuffer *irbuf,AST *node,BCContext context, enum MemOpKind kind,
enum MathOpKind modifyMathKind, bool modifyReverseMath, bool pushModifyResult, ByteOpIR *jumpTo, bool repeatPopStep) {
enum MemOpTargetKind targetKind = MOT_UNDEFINED;
if (jumpTo != NULL) {
if (kind != MEMOP_MODIFY || modifyMathKind != MOK_MOD_REPEATSTEP) ERROR(node,"Trying to compile memop with jumpTo that is not a jumping kind");
int stackdiff = context.hiddenVariables - jumpTo->attr.labelHiddenVars;
if (stackdiff) ERROR(node,"Modify jump to label with unequal hidden var count");
}
ByteOpIR memOp = {0};
memOp.mathKind = modifyMathKind;
memOp.attr.memop.modifyReverseMath = modifyReverseMath;
memOp.attr.memop.pushModifyResult = pushModifyResult;
memOp.attr.memop.repeatPopStep=repeatPopStep;
memOp.jumpTo=jumpTo;
AST *type = ExprType(node);
AST *typeoverride = NULL;
Symbol *sym = NULL;
HwReg *hwreg;
AST *baseExpr = NULL;
AST *indexExpr = NULL;
AST *typeAfterIndex = NULL;
AST *bitExpr1 = NULL;
AST *bitExpr2 = NULL;
AST *ident;
int memberOffset = 0;
int pushMultiple = 0;
if (node->kind == AST_METHODREF) {
AST *selector = node->right;
Module *P = GetClassPtr(ExprType(node->left));
if (!P) {
ERROR(node,"Unable to find object");
return;
}
if (!IsIdentifier(selector)) {
ERROR(node,"Expected identifier after `.'");
return;
}
const char *memberName = GetUserIdentifierName(selector);
node = node->left;
sym = LookupSymbolInTable(&P->objsyms, memberName);
if (!sym) {
ERROR(node,"Unable to find member %s in class %s", memberName, P->classname);
return;
}
switch(sym->kind) {
case SYM_VARIABLE:
memberOffset += sym->offset;
type = (AST *)sym->v.ptr;
if (!type) type = ast_type_long;
break;
case SYM_FUNCTION:
if (kind == MEMOP_ADDRESS) {
Function *F = (Function *)sym->v.ptr;
Module *M = F->module;
if (M->bedata == NULL) {
ERROR(node, "Cannot find address for function %s (no module info)", sym->user_name);
return;
}
int32_t addr = ModData(M)->compiledAddress;
int id = getFuncIDForKnownFunc(M, F);
if (addr < 0) {
//WARNING(node, "Need to patch address later");
BCCompilePushModuleFuncRef(irbuf, M, id);
} else {
uint32_t val = (id<<16) | addr;
BCCompileInteger(irbuf, val);
}
return;
}
ERROR(node, "Unhandled memory operation on function");
break;
case SYM_LABEL:
{
Module *M = (Module *)sym->module;
if (!M) {
ERROR(node,"Method reference for unknown module");
return;
}
if (M->bedata == NULL) {
ERROR(node, "Cannot find address for field %s (no module info)", sym->user_name);
return;
}
Label *lab = (Label *)sym->v.ptr;
BCCompilePushModuleDatRef(irbuf, M, lab->hubval);
switch (kind) {
case MEMOP_ADDRESS: break; /* nothing more to do */
case MEMOP_READ:
case MEMOP_WRITE:
break;
type = lab->type;
typeoverride = BaseType(type);
targetKind = MOT_MEM;
memOp.attr.memop.base = MEMOP_BASE_POP;
baseExpr = NULL;
memberOffset = 0;
goto nosymbol_memref;
default:
ERROR(node, "Unsupported operation on object DAT field");
break;
}
return;
}
default:
ERROR(node,"Wrong kind of symbol (%d) in method reference", sym->kind);
break;
}
}
if (node->kind == AST_ARRAYREF) {
ident = node->left;
indexExpr = node->right;
typeAfterIndex = BaseType(ExprType(ident));
} else ident = node;
try_ident_again:
if (IsIdentifier(ident) || ident->kind == AST_SYMBOL) sym = LookupAstSymbol(ident,NULL);
else if (ident->kind == AST_RESULT) {
if (curfunc && curfunc->resultexpr && IsIdentifier(curfunc->resultexpr)) {
sym = LookupAstSymbol(curfunc->resultexpr, NULL);
} else {
sym = LookupSymbol("result");
if (!sym) {
WARNING(node, "unable to find result variable");
sym = (Symbol *)calloc(sizeof(*sym), 1);
sym->kind = SYM_RESULT;
}
}
} else if (ident->kind == AST_MEMREF) {
if (!typeoverride && ident->right->kind == AST_ADDROF &&
ident->right->left && ident->right->left->kind == AST_ARRAYREF && IsConstZero(ident->right->left->right)) {
// Handle weird AST representation of "var.byte[x]""
DEBUG(node,"handling size override kind 1...");
typeoverride = ident->left;
ident = ident->right->left->left;
goto try_ident_again;
} else if (!typeoverride && ident->right->kind == AST_ADDROF && IsIdentifier(ident->right->left)) {
DEBUG(node,"handling size override kind 2...");
typeoverride = ident->left;
ident = ident->right->left;
goto try_ident_again;
} else {
// normal raw memory access
memOp.attr.memop.base = MEMOP_BASE_POP;
targetKind = MOT_MEM;
if (type) typeoverride = type;
type = ident->left;
baseExpr = ident->right;
if (memberOffset) {
baseExpr = AstOperator('+', baseExpr, AstInteger(memberOffset));
memberOffset = 0;
}
goto nosymbol_memref;
}
} else if (ident->kind == AST_HWREG) {
targetKind = MOT_REG;
hwreg = (HwReg *)ident->d.ptr;
memOp.data.int32 = HWReg2Index(hwreg);
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
goto after_typeinfer;
} else if (ident->kind == AST_SPRREF) {
targetKind = MOT_REGIDX;
baseExpr = ident->left; // Perhaps a bit odd to use baseExpr instead of indexExpr
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
// AST for SPR[n] somewhat rightfully is (n|496).
// The Spin1 interpreter does this internally
if (gl_interp_kind == INTERP_KIND_P1ROM) {
if (baseExpr->kind == AST_OPERATOR && baseExpr->d.ival == '|' && IsConstEqual(baseExpr->right,496)) baseExpr = baseExpr->left;
}
goto after_typeinfer;
} else if (ident->kind == AST_RANGEREF) {
ASSERT_AST_KIND(ident->left,AST_HWREG,return;);
ASSERT_AST_KIND(ident->right,AST_RANGE,return;);
hwreg = (HwReg *)ident->left->d.ptr;
memOp.data.int32 = HWReg2Index(hwreg);
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
bitExpr1 = ident->right->left;
bitExpr2 = ident->right->right;
targetKind = bitExpr2 ? MOT_REGBITRANGE : MOT_REGBIT;
goto after_typeinfer;
}
if (!sym) {
if (node->kind == AST_ARRAYREF && indexExpr && !baseExpr) {
memOp.attr.memop.base = MEMOP_BASE_POP;
targetKind = MOT_MEM;
baseExpr = ident;
goto nosymbol_memref;
}
ERROR(ident,"Can't get symbol");
return;
} else {
//printf("got symbol with name %s and kind %d\n",sym->our_name,sym->kind);
if (!type) type = ExprType(ident);
switch (sym->kind) {
case SYM_LABEL: {
memOp.attr.memop.base = MEMOP_BASE_PBASE;
targetKind = MOT_MEM;
Label *lab = (Label *)sym->v.ptr;
uint32_t labelval = lab->hubval;
// Add header offset
if (sym->module == current || sym->module == 0) {
labelval += BCgetDAToffset(current,false,node,true);
memOp.data.int32 = labelval;
} else {
WARNING(ident, "bytecode may not always support cross-module label references");
labelval += BCgetDAToffset((Module *)sym->module, true,node,true);
memOp.attr.memop.base = MEMOP_BASE_POP;
if (baseExpr) ERROR(node,"baseExpr already set?!?!");
else baseExpr = AstInteger(labelval);
}
} break;
case SYM_VARIABLE: {
if (sym->flags & SYMF_GLOBAL) {
DEBUG(node,"Got special symbol %s with offset %d",sym->our_name,sym->offset);
memOp.attr.memop.base = MEMOP_BASE_POP;
targetKind = MOT_MEM;
if (baseExpr) ERROR(node,"baseExpr already set?!?!");
else baseExpr = AstInteger(sym->offset);
} else {
memOp.attr.memop.base = MEMOP_BASE_VBASE;
targetKind = MOT_MEM;
memOp.data.int32 = sym->offset;
}
} break;
case SYM_CLOSURE:{
BCAddStaticReference(current, (AST *)sym->v.ptr);
memOp.attr.memop.base = MEMOP_BASE_VBASE;
targetKind = MOT_MEM;
memOp.data.int32 = 0;
} break;
case SYM_LOCALVAR: {
memOp.attr.memop.base = (curfunc->closure) ? MEMOP_BASE_VBASE : MEMOP_BASE_DBASE;
targetKind = MOT_MEM;
memOp.data.int32 = sym->offset;
} break;
case SYM_PARAMETER: {
memOp.attr.memop.base = (curfunc->closure) ? MEMOP_BASE_VBASE : MEMOP_BASE_DBASE;
targetKind = MOT_MEM;
memOp.data.int32 = sym->offset;
} break;
case SYM_TEMPVAR: {
memOp.attr.memop.base = MEMOP_BASE_DBASE;
targetKind = MOT_MEM;
memOp.data.int32 = sym->offset;
} break;
case SYM_RESERVED: {
if (!strcmp(sym->our_name,"result")) {
goto do_result;
} else {
ERROR(node,"Unhandled reserved word %s in assignment",sym->our_name);
}
}
do_result:
case SYM_RESULT: {
memOp.attr.memop.base = MEMOP_BASE_DBASE;
targetKind = MOT_MEM;
memOp.data.int32 = sym->offset;
} break;
case SYM_HWREG: {
targetKind = MOT_REG;
hwreg = (HwReg *)sym->v.ptr;
memOp.data.int32 = HWReg2Index(hwreg);
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
goto after_typeinfer;
} break;
case SYM_BUILTIN: {
if (!strcmp(sym->our_name,"_cogid")) {
if (kind != MEMOP_READ) WARNING(node,"Writing COGID register, bad idea");
Symbol *cogid_sym = LookupSymbolInTable(&spinCommonReservedWords,"__interp_cogid");
if (!cogid_sym || cogid_sym->kind != SYM_HWREG) {
ERROR(node,"Internal Error: Failed to get cogid register");
return;
}
targetKind = MOT_REG;
hwreg = (HwReg *)cogid_sym->v.ptr;
memOp.data.int32 = HWReg2Index(hwreg);
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
goto after_typeinfer;
} else {
ERROR(node,"Unhandled symbol identifier %s in memop",sym->our_name);
return;
}
} break;
case SYM_LOCALLABEL: {
if (kind == MEMOP_ADDRESS) {
if (indexExpr || baseExpr) {
ERROR(node,"Unable to offset label");
}
ByteOpIR *labelRef = BCNewNamedLabelRef(context,sym->our_name);
ByteOpIR pushOp = {.kind = BOK_FUNDATA_PUSHADDRESS, .jumpTo = labelRef, .attr.pushaddress.addPbase = true};
BIRB_PushCopy(irbuf, &pushOp);
return;
}
ERROR(node,"Unhandled memory operation on local label");
} break;
case SYM_FUNCTION: {
if (kind == MEMOP_ADDRESS) {
Function *F = (Function *)sym->v.ptr;
Module *M = F->module;
if (M->bedata == NULL) {
ERROR(node, "Cannot find address for function (no module info)");
return;
}
int32_t addr = ModData(M)->compiledAddress;
int id = getFuncIDForKnownFunc(M, F);
if (addr < 0) {
//WARNING(node, "Need to patch address later");
BCCompilePushModuleFuncRef(irbuf, M, id);
} else {
uint32_t val = (id<<16) | (addr);
BCCompileInteger(irbuf, val);
}
return;
}
ERROR(node, "Unhandled memory operation on function");
} break;
case SYM_ALIAS: {
AST *expr = (AST *)sym->v.ptr;
AST *typ = NULL;
if (expr->kind == AST_CAST) {
typ = expr->left;
expr = expr->right;
}
if (typ) typeoverride = type;
if (expr && expr->kind == AST_ARRAYREF) {
expr = expr->left;
}
if (IsIdentifier(expr) || expr->kind == AST_MEMREF) {
ident = expr;
goto try_ident_again;
}
ERROR(ident,"DECLARE ALIAS %s not handled yet in bytecode", sym->user_name);
return;
}
default:
ERROR(ident,"Unhandled Symbol type %d in memop",sym->kind);
return;
}
}
nosymbol_memref:
if (typeoverride) type = typeoverride;
if (IsPointerType(type))
type = ast_type_long;
else type = RemoveTypeModifiers(BaseType(type));
if (!type) type = ast_type_long;
switch (type->kind) {
case AST_GENERICTYPE:
case AST_UNSIGNEDTYPE: {
int size = type->left->d.ival;
switch (size) {
case 1: memOp.attr.memop.memSize = MEMOP_SIZE_BYTE; break;
case 2: memOp.attr.memop.memSize = MEMOP_SIZE_WORD; break;
// Technically treated as signed, but all the unsigned operators are seperate, anyways, so I guess it's fine?
case 4: memOp.attr.memop.memSize = MEMOP_SIZE_LONG; break;
case 8: memOp.attr.memop.memSize = MEMOP_SIZE_LONG; pushMultiple = 2; break;
default: ERROR(node,"Can't handle unsigned type with size %d",size); break;
}
} break;
case AST_INTTYPE:
case AST_SIGNED_BOOLTYPE:
case AST_UNS_BOOLTYPE: {
int size = type->left->d.ival;
switch (size) {
// sign-extend is generated for these
case 1: if (kind == MEMOP_WRITE || kind == MEMOP_READ) memOp.attr.memop.memSize = MEMOP_SIZE_BYTE; else goto signed_todo; break;
case 2: if (kind == MEMOP_WRITE || kind == MEMOP_READ) memOp.attr.memop.memSize = MEMOP_SIZE_WORD; else goto signed_todo; break;
case 4: memOp.attr.memop.memSize = MEMOP_SIZE_LONG; break;
case 8: memOp.attr.memop.memSize = MEMOP_SIZE_LONG; pushMultiple = 2; break;
signed_todo:
default: ERROR(node,"Can't handle signed type with size %d",size); break;
}
} break;
case AST_FLOATTYPE: {
int size = type->left->d.ival;
switch (size) {
case 4: memOp.attr.memop.memSize = MEMOP_SIZE_LONG; break;
case 8: memOp.attr.memop.memSize = MEMOP_SIZE_LONG; pushMultiple = 2; break;
default: ERROR(node,"Can't handle float type with size %d",size); break;
}
} break;
case AST_PTRTYPE:
case AST_FUNCTYPE: {
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
} break;
case AST_OBJECT: {
int size = TypeSize(type);
if (size == 4) {
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
} else if (kind == MEMOP_ADDRESS) {
// we're creating a pointer, need to offset appropriately
if (indexExpr) {
indexExpr = AstOperator('*', indexExpr, AstInteger(size / LONG_SIZE));
}
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
} else {
// need to push multiple values here
memOp.attr.memop.memSize = MEMOP_SIZE_LONG;
pushMultiple = size / 4;
}
} break;
default:
ERROR(node,"Unhandled type kind %d",type->kind);
}
after_typeinfer:
memOp.attr.memop.modSize = memOp.attr.memop.memSize; // Let's just assume these are the same
if (indexExpr && TypeSize(typeAfterIndex) != TypeSize(type)) {
indexExpr = AstOperator('*', indexExpr, AstInteger(TypeSize(typeAfterIndex) / TypeSize(type)));
type = typeAfterIndex;
}
switch(targetKind) {
case MOT_MEM: {
if (memberOffset) {
memOp.data.int32 += memberOffset;
if (memOp.attr.memop.base == MEMOP_BASE_POP) ERROR(node,"Internal Error: memberOffset on POP base");
}
// transform long[a+b] to long[a][b/4]
if (baseExpr && (!indexExpr || IsConstZero(indexExpr)) && baseExpr->kind == AST_OPERATOR && baseExpr->d.ival == '+') {
if (memOp.attr.memop.memSize == MEMOP_SIZE_BYTE) {
// Can always do this transform for bytes
indexExpr = baseExpr->right;
baseExpr = baseExpr->left;
} else {
int typeShift = memOp.attr.memop.memSize == MEMOP_SIZE_WORD ? 1 : 2;
int typeMask = memOp.attr.memop.memSize == MEMOP_SIZE_WORD ? 1 : 3;
if (IsConstExpr(baseExpr->right) && (EvalConstExpr(baseExpr->right) & typeMask) == 0) {
indexExpr = AstInteger(EvalConstExpr(baseExpr->right) >> typeShift);
baseExpr = baseExpr->left;
} else if (IsConstExpr(baseExpr->left) && (EvalConstExpr(baseExpr->left) & typeMask) == 0) {
indexExpr = AstInteger(EvalConstExpr(baseExpr->left) >> typeShift);
baseExpr = baseExpr->right;
}
}
}
//if (!!baseExpr != !!(memOp.attr.memop.base == MEMOP_BASE_POP)) ERROR(node,"Internal Error: baseExpr condition mismatch");
if (bitExpr1) ERROR(node,"Bit1 expression on memory op!");
if (bitExpr2) ERROR(node,"Bit2 expression on memory op!");
if (baseExpr) {
if (baseExpr->kind == AST_METHODREF) {
baseExpr = NewAST(AST_ADDROF, baseExpr, NULL);
}
BCCompileExpression(irbuf,baseExpr,context,false);
}
// handle index
if (indexExpr) {
bool indexConst = IsConstExpr(indexExpr);
int constIndexVal;
if (indexConst) constIndexVal = EvalConstExpr(indexExpr);
if (baseExpr && indexConst && constIndexVal == 0) {
// In this case, do nothing
} else if (!baseExpr && indexConst) {
// Just add index onto base
if (memOp.attr.memop.memSize == MEMOP_SIZE_BYTE) memOp.data.int32 += constIndexVal;
else if (memOp.attr.memop.memSize == MEMOP_SIZE_WORD) memOp.data.int32 += constIndexVal << 1;
else if (memOp.attr.memop.memSize == MEMOP_SIZE_LONG) memOp.data.int32 += constIndexVal << 2;
} else if (baseExpr && pushMultiple) {
ERROR(indexExpr, "Cannot handle indices with large values");
} else {
// dynamic index
memOp.attr.memop.popIndex = true;
BCCompileExpression(irbuf,indexExpr,context,false);
}
}
switch (kind) {
case MEMOP_READ: memOp.kind = BOK_MEM_READ; break;
case MEMOP_WRITE: memOp.kind = BOK_MEM_WRITE; break;
case MEMOP_MODIFY: memOp.kind = BOK_MEM_MODIFY; break;
case MEMOP_ADDRESS: memOp.kind = BOK_MEM_ADDRESS; break;
default: ERROR(node,"Unknown memop kind %d",kind); break;
}
} break;
case MOT_REG: {
if (baseExpr) ERROR(node,"Base expression on plain register op!");
if (indexExpr) ERROR(node,"Index expression on plain register op!");
if (bitExpr1) ERROR(node,"Bit1 expression on plain register op!");
if (bitExpr2) ERROR(node,"Bit2 expression on plain register op!");
if (memOp.attr.memop.memSize != MEMOP_SIZE_LONG) ERROR(node,"Non-long size on plain register op!");
switch (kind) {
case MEMOP_READ: memOp.kind = BOK_REG_READ; break;
case MEMOP_WRITE: memOp.kind = BOK_REG_WRITE; break;
case MEMOP_MODIFY: memOp.kind = BOK_REG_MODIFY; break;
case MEMOP_ADDRESS: ERROR(node,"Trying to get address of register"); break;
default: ERROR(node,"Unknown memop kind %d",kind); break;
}
} break;
case MOT_REGBIT: {
if (baseExpr) ERROR(node,"Base expression on register bit op!");
if (indexExpr) ERROR(node,"Index expression on register bit op!");
if (bitExpr2) ERROR(node,"Bit2 expression on register bit op!");
if (memOp.attr.memop.memSize != MEMOP_SIZE_LONG) ERROR(node,"Non-long size on register bit op!");
memOp.attr.memop.modSize = MEMOP_SIZE_BIT; // I guess?
BCCompileExpression(irbuf,bitExpr1,context,false);
switch (kind) {
case MEMOP_READ: memOp.kind = BOK_REGBIT_READ; break;
case MEMOP_WRITE: memOp.kind = BOK_REGBIT_WRITE; break;
case MEMOP_MODIFY: memOp.kind = BOK_REGBIT_MODIFY; break;
case MEMOP_ADDRESS: ERROR(node,"Trying to get address of register"); break;
default: ERROR(node,"Unknown memop kind %d",kind); break;
}
} break;
case MOT_REGBITRANGE: {
if (baseExpr) ERROR(node,"Base expression on register range op!");
if (indexExpr) ERROR(node,"Index expression on register range op!");
if (memOp.attr.memop.memSize != MEMOP_SIZE_LONG) ERROR(node,"Non-long size on register range op!");
memOp.attr.memop.modSize = MEMOP_SIZE_BIT; // I guess?
BCCompileExpression(irbuf,bitExpr1,context,false);
BCCompileExpression(irbuf,bitExpr2,context,false);
switch (kind) {
case MEMOP_READ: memOp.kind = BOK_REGBITRANGE_READ; break;
case MEMOP_WRITE: memOp.kind = BOK_REGBITRANGE_WRITE; break;
case MEMOP_MODIFY: memOp.kind = BOK_REGBITRANGE_MODIFY; break;
case MEMOP_ADDRESS: ERROR(node,"Trying to get address of register"); break;
default: ERROR(node,"Unknown memop kind %d",kind); break;
}
} break;
case MOT_REGIDX: {
if (indexExpr) ERROR(node,"Index expression on indexed register op!");
if (bitExpr1) ERROR(node,"Bit1 expression on indexed register op!");