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1884 lines (1806 loc) · 53.3 KB
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/*
* Spin to C/C++ converter
* Copyright 2011-2023 Total Spectrum Software Inc.
* See the file COPYING for terms of use
*
* code for handling expressions
*/
#include "spinc.h"
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include "outcpp.h"
#define gl_ccode (gl_output == OUTPUT_C)
static void PrintStringLiteral(Flexbuf *f, const char *s);
static int
isBooleanOperator(AST *expr)
{
int x;
if (expr->kind != AST_OPERATOR)
return 0;
x = expr->d.ival;
switch (x) {
case K_BOOL_NOT:
case K_BOOL_AND:
case K_BOOL_OR:
case K_LE:
case K_LEU:
case '<':
case K_LTU:
case K_GE:
case K_GEU:
case '>':
case K_GTU:
case K_EQ:
case K_NE:
return 1;
default:
return 0;
}
}
static int
isNegateOperator(AST *expr)
{
if (expr->kind != AST_OPERATOR)
return 0;
if (expr->d.ival != K_NEGATE)
return 0;
return 1;
}
/* code to print a label to a file
* if "ref" is nonzero this is an array reference, so do not
* dereference again
*/
static void
PrintLabel(Flexbuf *f, Symbol *sym, int flags)
{
int ref = (flags & PRINTEXPR_ISREF) != 0;
int divBy4 = (flags & PRINTEXPR_GASIMM) != 0;
Label *lab = (Label *)sym->v.ptr;
if (current->pasmLabels && !(flags & PRINTEXPR_GASABS)) {
if (divBy4) {
flexbuf_printf(f, "(_lbl_(%s)/4)", sym->user_name);
} else {
flexbuf_printf(f, "_lbl_(%s)", sym->user_name);
}
} else if (current->gasPasm || (flags & PRINTEXPR_DEBUG)) {
flexbuf_printf(f, "%s", sym->user_name);
} else {
flexbuf_printf(f, "(%s(", ref ? "" : "*");
PrintType(f, lab->type, 0);
flexbuf_printf(f, "*)&%s[%d])", current->datname, lab->hubval);
}
}
static void
PrintHere(Flexbuf *f, AST *ast, int flags)
{
int divBy4 = (flags & PRINTEXPR_GASIMM) != 0;
Symbol *org = (Symbol *)ast->d.ptr; // last origin value seen
if (current->pasmLabels) {
if (divBy4) {
flexbuf_printf(f, "((. - %s)/4)", org->user_name);
} else {
flexbuf_printf(f, "(. - %s)", org->user_name);
}
} else if (current->gasPasm) {
flexbuf_printf(f, ".");
} else {
ERROR(ast, "AST_HERE encountered in unexpected context");
}
}
/* code to print an integer */
void
PrintInteger(Flexbuf *f, int32_t v, int flags)
{
if (current->pasmLabels) {
if ((flags & PRINTEXPR_GASOP) && !(flags & PRINTEXPR_GASIMM)) {
v *= 4; // adjust for COG addressing
}
if (v > -10 && v < 10) {
flexbuf_printf(f, "%ld", (long)v);
} else {
flexbuf_printf(f, "$%lx", (long)(uint32_t)v);
}
}
else if (v == (int32_t)0x80000000)
flexbuf_printf(f, "(%s)0x%lxU", gl_intstring, (long)(uint32_t)v);
else
flexbuf_printf(f, "%ld", (long)v);
}
/* code to print a float */
void
PrintFloat(Flexbuf *f, int32_t v, int flags)
{
bool printAsFloat;
if (flags & PRINTEXPR_USEFLOATS) {
printAsFloat = true;
} else if (gl_fixedreal) {
printAsFloat = false;
} else {
int language;
if (curfunc) {
language = curfunc->language;
} else if (current) {
language = current->curLanguage;
} else {
ERROR(NULL, "Unable to determine language");
language = LANG_SPIN_SPIN1;
}
if ( IsSpinLang(language) ) {
printAsFloat = false;
} else {
printAsFloat = true;
}
}
if (printAsFloat) {
if (gl_fixedreal) {
flexbuf_printf(f, "%f", (float)(v)/(float)(1<<G_FIXPOINT));
} else {
flexbuf_printf(f, "%f", intAsFloat(v));
}
return;
}
if (v < 0)
flexbuf_printf(f, "(%s)0x%lx", gl_intstring, (long)(uint32_t)v);
else
flexbuf_printf(f, "0x%lx", (long)v);
}
static void
PrintUpper(Flexbuf *f, const char *name)
{
int c;
while ((c = *name++) != 0) {
flexbuf_addchar(f, toupper(c));
}
}
void
PrintObjConstName(Flexbuf *f, Module *P, const char* symname)
{
if (gl_ccode || gl_gas_dat) {
PrintUpper(f, P->classname);
flexbuf_printf(f, "_");
PrintUpper(f, symname);
} else {
flexbuf_printf(f, "%s::%s", P->classname, symname);
}
}
void
CppPrintName(Flexbuf *f, const char *name, int flags)
{
int c;
if (flags & PRINTEXPR_INLINESYM) {
flexbuf_printf(f, "%%[", name);
}
if (!strcmp(name, "clkfreq")) {
if (gl_p2) {
flexbuf_printf(f, "_clockfreq()");
} else {
flexbuf_printf(f, "_CLKFREQ");
}
} else {
while (0 != (c = *name++)) {
switch (c) {
case '#':
flexbuf_printf(f, "_R");
break;
case '%':
flexbuf_printf(f, "_I");
break;
case '$':
flexbuf_printf(f, "_S");
break;
default:
flexbuf_addchar(f, c);
break;
}
}
}
if (flags & PRINTEXPR_INLINESYM) {
flexbuf_printf(f, "]");
}
}
/* code to print a symbol to a file */
void
PrintSymbol(Flexbuf *f, Symbol *sym, int flags)
{
switch (sym->kind) {
case SYM_LABEL:
PrintLabel(f, sym, flags);
break;
case SYM_CONSTANT:
case SYM_FLOAT_CONSTANT:
if (IsReservedWord(sym->user_name) && !(flags & PRINTEXPR_USECONST)) {
int32_t v;
v = EvalConstExpr((AST *)sym->v.ptr);
PrintInteger(f, v, flags);
} else if (gl_ccode || gl_gas_dat) {
PrintObjConstName(f, current, sym->user_name);
} else {
CppPrintName(f, sym->user_name, flags);
}
break;
case SYM_PARAMETER:
if (curfunc && curfunc->parmarray && !(flags & PRINTEXPR_INLINESYM)) {
flexbuf_printf(f, "%s[%d]", curfunc->parmarray, curfunc->result_in_parmarray+sym->offset/4);
} else {
CppPrintName(f, sym->user_name, flags);
}
break;
case SYM_LOCALVAR:
case SYM_TEMPVAR:
if (curfunc && curfunc->localarray && !(flags & PRINTEXPR_INLINESYM)) {
flexbuf_printf(f, "%s[%d]", curfunc->localarray, sym->offset/4);
} else {
CppPrintName(f, sym->user_name, flags);
}
break;
case SYM_RESULT:
if (curfunc && curfunc->result_in_parmarray && !(flags & PRINTEXPR_INLINESYM)) {
flexbuf_printf(f, "%s[0]", curfunc->parmarray);
} else {
CppPrintName(f, sym->user_name, flags);
}
break;
case SYM_VARIABLE:
if (sym->flags & SYMF_GLOBAL) {
if (!strcmp(sym->user_name, "__clkfreq_var")) {
CppPrintName(f, "_clkfreq", flags);
break;
} else if (!strcmp(sym->user_name, "__clkmode_var")) {
CppPrintName(f, "_clkmode", flags);
break;
}
}
if ( (gl_ccode || (curfunc && curfunc->force_static))
&& !(sym->flags & SYMF_GLOBAL) )
{
flexbuf_printf(f, "self->");
}
CppPrintName(f, sym->user_name, flags);
break;
case SYM_FUNCTION:
default:
CppPrintName(f, sym->user_name, 0);
break;
}
}
/* code to print a function call to a file */
/* localMethod is true for plain calls (like foo(x))
and false for object references (like bar.foo(x))
*/
void
PrintFuncCall(Flexbuf *f, Symbol *sym, AST *params, AST *objtype, AST *objref)
{
int is_static = 0;
bool localMethod = false;
Function *func = NULL;
if (sym->kind == SYM_FUNCTION) {
func = (Function *)sym->v.ptr;
is_static = func->is_static;
localMethod = (objtype == NULL) && (objref == NULL);
}
if (gl_ccode) {
if (objref) {
PrintExpr(f, objref, PRINTEXPR_TOPLEVEL);
}
} else {
if (localMethod && curfunc && curfunc->force_static) {
// need to call through an object
flexbuf_printf(f, "self->");
} else if (objref && objref->left) {
PrintExpr(f, objref->left, PRINTEXPR_TOPLEVEL);
flexbuf_printf(f, ".");
}
}
/* check for object method call */
flexbuf_printf(f, "%s(", sym->user_name);
if ( (gl_ccode && !is_static)
|| (func && func->force_static)
) {
if (objtype) {
flexbuf_printf(f, "&");
PrintExpr(f, objref->left, PRINTEXPR_DEFAULT);
} else {
flexbuf_printf(f, "self");
}
if (params)
flexbuf_printf(f, ", ");
}
/* print the arguments */
PrintExprList(f, params, PRINTEXPR_DEFAULT, func);
flexbuf_printf(f, ")");
}
/* code to print coginit to a file */
void
PrintLabelCoginit(Flexbuf *f, AST *params)
{
const char *funcname = gl_p2 ? "_cogstart_PASM" : "coginit";
if (params->kind == AST_COGINIT) {
params = params->left;
} else {
ERROR(params, "expected coginit");
return;
}
if (params && params->left && IsConstExpr(params->left)) {
int32_t cogid = EvalConstExpr(params->left);
bool use_cognew = false;
if (gl_p2) {
use_cognew = (cogid == 16);
} else {
use_cognew = (cogid >= NUM_COGS || cogid < 0);
}
if (use_cognew) {
params = params->right;
funcname = gl_p2 ? "_cognew" : "cognew";
}
}
flexbuf_printf(f, "%s(", funcname);
PrintExprList(f, params, PRINTEXPR_DEFAULT, NULL);
flexbuf_printf(f, ")");
}
void
PrintStackWithSize(Flexbuf *f, AST *origstack)
{
AST *stack = origstack;
AST *stype;
int stacksize;
Symbol *sym;
if (stack->kind != AST_ADDROF) {
ERROR(stack, "non-address given for stack in coginit");
return;
}
stack = stack->left;
if (stack->kind != AST_ARRAYREF || !stack->left) {
ERROR(stack, "coginit stack is not part of an array");
return;
}
if (!IsIdentifier(stack->left)) {
ERROR(stack, "coginit stack too complicated");
return;
}
sym = LookupAstSymbol(stack->left, "coginit/cognew");
if (!sym) {
return;
}
stype = (AST *)sym->v.ptr;
if (!stype || stype->kind != AST_ARRAYTYPE) {
ERROR(stack, "coginit stack is not array");
return;
}
stacksize = EvalConstExpr(stype->right) * TypeSize(stype->left);
/* now change the array reference to use the top of stack */
PrintSymbol(f, sym, PRINTEXPR_DEFAULT);
flexbuf_printf(f, ", %d", stacksize);
}
void
PrintSpinCoginit(Flexbuf *f, AST *body)
{
AST *cogid;
AST *func;
AST *stack;
AST *params = NULL;
int n = 0;
Symbol *sym = NULL;
if (body->kind == AST_COGINIT) {
body = body->left;
} else {
ERROR(params, "expected coginit");
return;
}
if (!body || body->kind != AST_EXPRLIST) {
ERROR(body, "Expected expression list");
return;
}
cogid = body->left; body = body->right;
if (!body || body->kind != AST_EXPRLIST) {
ERROR(body, "Expected expression in coginit");
return;
}
func = body->left; stack = body->right;
if (!stack || !func) {
ERROR(body, "coginit of spin method requires function and stack");
return;
}
if (stack->kind != AST_EXPRLIST) {
ERROR(stack, "coginit: expected stack expression");
return;
}
if (stack->right != 0) {
ERROR(stack, "coginit: extra parameters after stack");
return;
}
stack = stack->left;
if (IsIdentifier(func)) {
sym = LookupAstSymbol(func, "coginit/cognew");
} else if (func->kind == AST_FUNCCALL) {
sym = LookupAstSymbol(func->left, "coginit/cognew");
params = func->right;
}
if (!sym || sym->kind != SYM_FUNCTION) {
ERROR(body, "coginit expected spin method");
return;
}
flexbuf_printf(f, "Coginit__(");
PrintExpr(f, cogid, PRINTEXPR_TOPLEVEL);
flexbuf_printf(f, ", (void *)");
/* need to find stack size */
PrintStackWithSize(f, stack);
flexbuf_printf(f, ", (void *)");
if (gl_ccode && sym && sym->kind == SYM_FUNCTION) {
flexbuf_printf(f, "%s_", current->classname);
}
PrintSymbol(f, sym, PRINTEXPR_DEFAULT);
/* print parameters, and pad with 0's */
while (params || n < 4) {
if (params && params->kind != AST_EXPRLIST) {
ERROR(params, "expected expression list");
return;
}
flexbuf_printf(f, ", ");
if (params) {
PrintTypedExpr(f, NULL, params->left, PRINTEXPR_TOPLEVEL);
params = params->right;
} else {
flexbuf_printf(f, "0");
}
n++;
}
if (n > 4) {
ERROR(body, "too many arguments to spin method in coginit/cognew");
}
flexbuf_printf(f, ")");
}
void
PrintCogInit(Flexbuf *f, AST *params)
{
if (!params || !params->left) {
ERROR(params, "coginit/cognew requires parameters");
return;
}
if (IsSpinCoginit(params, NULL)) {
PrintSpinCoginit(f, params);
} else {
PrintLabelCoginit(f, params);
}
}
/* code to print left operator right
*/
static void
PrintInOp(Flexbuf *f, const char *op, AST *left, AST *right, int flags)
{
if (left && right) {
PrintTypedExpr(f, NULL, left, flags);
flexbuf_printf(f, " %s ", op);
PrintTypedExpr(f, NULL, right, flags);
} else if (right) {
flexbuf_printf(f, "%s", op);
PrintTypedExpr(f, NULL, right, flags);
} else {
PrintTypedExpr(f, NULL, left, flags);
flexbuf_printf(f, "%s", op);
}
}
/* code to print left operator right where operator is a bit manipulation
* operator
* just like PrintInOp, but prints integer constants in hex
*/
static void
PrintHexExpr(Flexbuf *f, AST *left, int flags)
{
if (left->kind == AST_INTEGER || left->kind == AST_FLOAT) {
flexbuf_printf(f, "0x%x", EvalConstExpr(left));
} else {
PrintExpr(f, left, flags);
}
}
static void
PrintLogicOp(Flexbuf *f, const char *op, AST *left, AST *right, int flags)
{
if (left && right) {
PrintHexExpr(f, left, flags);
flexbuf_printf(f, " %s ", op);
PrintHexExpr(f, right, flags);
} else if (right) {
flexbuf_printf(f, "%s", op);
PrintHexExpr(f, right, flags);
} else {
PrintHexExpr(f, left, flags);
flexbuf_printf(f, "%s", op);
}
}
static void
PrintMacroExpr(Flexbuf *f, const char *name, AST *left, AST *right, int flags)
{
flexbuf_printf(f, "%s(", name);
PrintTypedExpr(f, NULL, left, flags);
flexbuf_printf(f, ", ");
PrintTypedExpr(f, NULL, right, flags);
flexbuf_printf(f, ")");
}
void
PrintOperator(Flexbuf *f, int op, AST *left, AST *right, int flags)
{
char opstring[4];
AST *subexpr;
switch (op) {
case K_HIGHMULT:
PrintMacroExpr(f, "Highmult__", left, right, flags);
break;
case K_LE:
PrintInOp(f, "<=", left, right, flags);
break;
case K_GE:
PrintInOp(f, ">=", left, right, flags);
break;
case K_LEU:
PrintInOp(f, "<=", left, right, flags | PRINTEXPR_FORCE_UNS);
break;
case K_GEU:
PrintInOp(f, ">=", left, right, flags | PRINTEXPR_FORCE_UNS);
break;
case K_LTU:
PrintInOp(f, "<", left, right, flags | PRINTEXPR_FORCE_UNS);
break;
case K_GTU:
PrintInOp(f, ">", left, right, flags | PRINTEXPR_FORCE_UNS);
break;
case K_EQ:
PrintInOp(f, "==", left, right, flags);
break;
case K_NE:
PrintInOp(f, "!=", left, right, flags);
break;
case K_SHL:
PrintInOp(f, "<<", left, right, flags);
break;
case K_SAR:
PrintInOp(f, ">>", left, right, flags);
break;
case K_SHR:
if (current->pasmLabels
|| (IsConstExpr(left) && EvalConstExpr(left) >= 0))
{
PrintInOp(f, ">>", left, right, flags);
} else {
PrintMacroExpr(f, "Shr__", left, right, flags);
}
break;
case K_REV:
flexbuf_printf(f, "__builtin_propeller_rev(");
PrintExpr(f, left, flags);
flexbuf_printf(f, ", 32 - ");
PrintExpr(f, right, flags);
flexbuf_printf(f, ")");
break;
case K_MODULUS:
PrintInOp(f, "%", left, right, flags);
break;
case K_INCREMENT:
case K_DECREMENT:
{
// we don't go through the usual PrintInOp because we
// have to control the casting
const char *str = op == K_INCREMENT ? "++" : "--";
const char *prefix;
const char *suffix;
AST *finalType;
int needCast = 0;
prefix = left ? "" : str;
suffix = left ? str : "";
finalType = left ? ExprType(left) : ExprType(right);
if (finalType && IsPointerType(finalType)) {
needCast = 0 != curfunc->parmarray;
}
if (needCast) {
flexbuf_addstr(f, "((");
PrintType(f, finalType, 0);
flexbuf_addstr(f, ")");
}
flexbuf_printf(f, "%s", prefix);
PrintExpr(f, left ? left : right, flags);
flexbuf_printf(f, "%s", suffix);
if (needCast) {
flexbuf_addstr(f, ")");
}
break;
}
case K_NEGATE:
/* watch out for a special case: boolean operators get a negation as well,
so optimize away the double negate */
/* similarly for - - x */
if (isBooleanOperator(right) || (isNegateOperator(right))) {
PrintOperator(f, right->d.ival, right->left, right->right, flags);
} else {
PrintInOp(f, "-", left, right, flags);
}
break;
case K_BIT_NOT:
PrintLogicOp(f, "~", left, right, flags);
break;
case K_BOOL_AND:
PrintInOp(f, "&&", left, right, flags);
break;
case K_BOOL_OR:
PrintInOp(f, "||", left, right, flags);
break;
case K_BOOL_NOT:
PrintInOp(f, "!", left, right, flags);
break;
case K_LIMITMIN:
PrintMacroExpr(f, "Max__", left, right, flags);
break;
case K_LIMITMAX:
PrintMacroExpr(f, "Min__", left, right, flags);
break;
case K_ROTL:
PrintMacroExpr(f, "Rotl__", left, right, flags);
break;
case K_ROTR:
PrintMacroExpr(f, "Rotr__", left, right, flags);
break;
case K_ABS:
flexbuf_printf(f, "abs(");
PrintExpr(f, right, flags);
flexbuf_printf(f, ")");
break;
case K_SQRT:
flexbuf_printf(f, "Sqrt__(");
PrintExpr(f, right, flags);
flexbuf_printf(f, ")");
break;
case K_ZEROEXTEND:
subexpr = SimpleOptimizeExpr(AstOperator('-', AstInteger(32), right));
flexbuf_printf(f, "((uint32_t)");
PrintExpr(f, left, flags);
flexbuf_printf(f, " << ");
PrintExpr(f, subexpr, flags);
flexbuf_printf(f, ") >> ");
PrintExpr(f, subexpr, flags);
break;
case K_SIGNEXTEND:
subexpr = SimpleOptimizeExpr(AstOperator('-', AstInteger(32), right));
flexbuf_printf(f, "((int32_t)");
PrintExpr(f, left, flags);
flexbuf_printf(f, " << ");
PrintExpr(f, subexpr, flags);
flexbuf_printf(f, ") >> ");
PrintExpr(f, subexpr, flags);
break;
case '?':
if (left) {
flexbuf_printf(f, "RandForw__(");
PrintExpr(f, left, flags);
flexbuf_printf(f, ")");
} else {
flexbuf_printf(f, "RandBack__(");
PrintExpr(f, right, flags);
flexbuf_printf(f, ")");
}
break;
case '&':
case '|':
case '^':
opstring[0] = op;
opstring[1] = 0;
PrintLogicOp(f, opstring, left, right, flags);
break;
case '+':
case '-':
case '/':
case '*':
case '<':
case '>':
opstring[0] = op;
opstring[1] = 0;
PrintInOp(f, opstring, left, right, flags);
break;
case K_ENCODE:
flexbuf_printf(f, "BitEncode__(");
PrintExpr(f, right, flags);
flexbuf_printf(f, ")");
break;
case K_DECODE:
flexbuf_printf(f, "(1<<");
PrintExpr(f, right, flags);
flexbuf_printf(f, ")");
break;
case K_FRAC64:
flexbuf_printf(f, "( ((uint64_t)");
PrintExpr(f, left, flags);
flexbuf_printf(f, ") << 32 ) / ((uint64_t)");
PrintExpr(f, right, flags);
flexbuf_printf(f, ")");
break;
case K_UNS_HIGHMULT:
flexbuf_printf(f, "(int32_t)( ((uint64_t)");
PrintExpr(f, left, flags);
flexbuf_printf(f, ") * ((uint64_t)");
PrintExpr(f, right, flags);
flexbuf_printf(f, ") >> 32 )");
break;
case K_SCAS:
flexbuf_printf(f, "(int32_t)( ((int64_t)");
PrintExpr(f, left, flags);
flexbuf_printf(f, ") * ((int64_t)");
PrintExpr(f, right, flags);
flexbuf_printf(f, ") >> 30 )");
break;
case K_UNS_DIV:
flexbuf_printf(f, "(int32_t)( ((uint32_t)");
PrintExpr(f, left, flags);
flexbuf_printf(f, ") / ((uint32_t)");
PrintExpr(f, right, flags);
flexbuf_printf(f, ") )");
break;
case K_UNS_MOD:
flexbuf_printf(f, "(int32_t)( ((uint32_t)");
PrintExpr(f, left, flags);
flexbuf_printf(f, ") %% ((uint32_t)");
PrintExpr(f, right, flags);
flexbuf_printf(f, ") )");
break;
default:
ERROR(NULL, "unsupported operator 0x%x", op);
break;
}
}
/*
* code to print out a type declaration
*/
static void
doPrintType(Flexbuf *f, AST *typedecl, int addspace, int flags)
{
int size;
char *space = addspace ? " " : "";
if (!typedecl) {
typedecl = ast_type_generic;
}
if (typedecl->kind == AST_MODIFIER_VOLATILE) {
doPrintType(f, typedecl->left, addspace, flags | ISVOLATILE);
return;
}
if (typedecl->kind == AST_MODIFIER_CONST) {
doPrintType(f, typedecl->left, addspace, flags | ISCONST);
return;
}
if (typedecl->kind != AST_PTRTYPE && (flags & ISVOLATILE)) {
flexbuf_printf(f, "volatile ");
}
if (typedecl->kind != AST_PTRTYPE && (flags & ISCONST)) {
flexbuf_printf(f, "const ");
}
switch (typedecl->kind) {
case AST_TYPEOF:
flexbuf_printf(f, "typeof(");
PrintExpr(f, typedecl->left, PRINTEXPR_DEFAULT);
flexbuf_printf(f, ")%s", space);
return;
case AST_GENERICTYPE:
case AST_INTTYPE:
case AST_UNSIGNEDTYPE:
size = EvalConstExpr(typedecl->left);
if (typedecl->kind == AST_UNSIGNEDTYPE) {
if (size == 1) {
flexbuf_printf(f, "char%s", space);
return;
} else {
flexbuf_printf(f, "u");
}
}
switch (size) {
case 1:
flexbuf_printf(f, "int8_t%s", space);
break;
case 2:
flexbuf_printf(f, "int16_t%s", space);
break;
case 4:
//flexbuf_printf(f, "int32_t");
flexbuf_printf(f, "%s%s", gl_intstring, space);
break;
case 8:
flexbuf_printf(f, "int64_t%s", space);
break;
default:
ERROR(typedecl, "unsupported integer size %d", size);
break;
}
break;
case AST_FLOATTYPE:
size = EvalConstExpr(typedecl->left);
if ( (curfunc && IsSpinLang(curfunc->language)) || gl_fixedreal) {
// eventually we will want to really support float operands
// but for now, treat floats as ints
if (size == 4) {
flexbuf_printf(f, "int32_t%s", space);
} else {
ERROR(typedecl, "unsupported float size %d", size);
}
} else {
if (size == 4) {
flexbuf_printf(f, "float%s", space);
} else if (size == 8) {
flexbuf_printf(f, "long double%s", space);
} else {
ERROR(typedecl, "unsupported float size %d", size);
}
}
break;
case AST_COPYREFTYPE:
doPrintType(f, typedecl->left, 1, 0);
break;
case AST_REFTYPE:
case AST_PTRTYPE:
case AST_ARRAYTYPE:
doPrintType(f, typedecl->left, 1, 0);
flexbuf_printf(f, "*");
if (0 != (flags & ISVOLATILE)) {
flexbuf_printf(f, "volatile ");
}
if (0 != (flags & ISCONST)) {
flexbuf_printf(f, "const ");
}
break;
case AST_TUPLE_TYPE:
flexbuf_printf(f, "Tuple%d__%s", AstListLen(typedecl), space);
break;
case AST_VOIDTYPE:
flexbuf_printf(f, "void%s", space);
break;
case AST_OBJECT:
{
Module *P = (Module *)typedecl->d.ptr;
flexbuf_printf(f, "%s%s", P->classname, space);
}
break;
case AST_FUNCTYPE:
{
flexbuf_printf(f, "void *");
}
break;
default:
ERROR(typedecl, "unknown type declaration %d", typedecl->kind);
break;
}
}
void
PrintType(Flexbuf *f, AST *typedecl, int flags)
{
doPrintType(f, typedecl, 1, flags);
}
void
PrintCastType(Flexbuf *f, AST *typedecl)
{
doPrintType(f, typedecl, 0, 0);
}
/* code to print a source expression (could be an array reference or
* range)
* if "assignment" is true then we are in an assignment operator, so
* only certain types of symbols are valid
* if "ref" is true then we are planning to use the expression
* as a reference, so no extra dereferencing should be added to
* e.g. labels, and plain symbols and such should be cast appropriately
*/
void
PrintLHS(Flexbuf *f, AST *expr, int flags)
{
Symbol *sym;
HwReg *hw;
int assignment = (flags & PRINTEXPR_ASSIGNMENT) != 0;
int ref = (flags & PRINTEXPR_ISREF) != 0;
//flags &= ~PRINTEXPR_ISREF;
switch (expr->kind) {
case AST_RESULT:
if (flags & PRINTEXPR_DEBUG) {
flexbuf_addstr(f, "RESULT");
} else if (!curfunc) {
ERROR(expr, "RESULT keyword outside of function");
} else if (curfunc->result_in_parmarray) {
flexbuf_printf(f, "%s[0]", curfunc->parmarray);
} else {
PrintLHS(f, curfunc->resultexpr, flags);
}
break;
case AST_IDENTIFIER:
case AST_LOCAL_IDENTIFIER:
case AST_SYMBOL:
sym = LookupAstSymbol(expr, NULL);
if (flags & PRINTEXPR_DEBUG) {
flexbuf_addstr(f, GetUserIdentifierName(expr));
} else if (!sym) {
ERROR_UNKNOWN_SYMBOL(expr);
} else {
if (sym->kind == SYM_FUNCTION || sym->kind == SYM_BUILTIN) {
if (assignment) {
ERROR(expr, "symbol %s on left hand side of assignment", sym->user_name);
} else {
if (sym->kind == SYM_BUILTIN) {
Builtin *b = (Builtin *)sym->v.ptr;
(*b->printit)(f, b, NULL);
} else {
if (gl_ccode) {
flexbuf_printf(f, "%s_", current->classname);
}
PrintFuncCall(f, sym, NULL, NULL, NULL);
}
}
} else {
PrintSymbol(f, sym, flags);
}
}
break;
case AST_ADDROF:
case AST_DATADDROF:
case AST_ABSADDROF:
if (!ref) {
flexbuf_printf(f, "(%s)", gl_intstring);
}
PrintLHS(f, expr->left, flags | PRINTEXPR_ISREF);
break;
case AST_ARRAYREF:
flags &= ~PRINTEXPR_ASSIGNMENT;
if (expr->left && IsIdentifier(expr->left)) {
sym = LookupAstSymbol(expr->left, NULL);
} else {
sym = NULL;
}
if (flags & PRINTEXPR_DEBUG) {
PrintLHS(f, expr->left, flags);
} else if (sym && sym->kind == SYM_LOCALVAR && curfunc && curfunc->localarray) {
flexbuf_printf(f, "%s[%d + ", curfunc->localarray, sym->offset/4);
PrintExpr(f, expr->right, flags);
flexbuf_printf(f, "]");
} else {
if (sym && (!IsArrayOrPointerSymbol(sym))) {
// ERROR(expr, "array dereference of bad symbol %s", sym->user_name);