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Renamed ExprLoad to LoadExpr.

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Moved LoadExpr + support functions into a separate module.
Removed obsolete files.
Some cleanup and makefile adjustments.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3114 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2004-06-09 19:25:28 +00:00
parent 8752f0b2c1
commit 975323ece2
2 changed files with 242 additions and 0 deletions
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176
src/cc65/loadexpr.c Normal file
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/*****************************************************************************/
/* */
/* loadexpr.c */
/* */
/* Load an expression into the primary register */
/* */
/* */
/* */
/* (C) 2004 Ullrich von Bassewitz */
/* R<>merstra<72>e 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
/* cc65 */
#include "codegen.h"
#include "error.h"
#include "exprdesc.h"
#include "global.h"
#include "loadexpr.h"
/*****************************************************************************/
/* Code */
/*****************************************************************************/
static void LoadConstant (unsigned Flags, ExprDesc* Expr)
/* Load the primary register with some constant value. */
{
switch (ED_GetLoc (Expr)) {
case E_LOC_ABS:
/* Number constant */
g_getimmed (Flags | TypeOf (Expr->Type) | CF_CONST, Expr->IVal, 0);
break;
case E_LOC_GLOBAL:
/* Global symbol, load address */
g_getimmed ((Flags | CF_EXTERNAL) & ~CF_CONST, Expr->Name, Expr->IVal);
break;
case E_LOC_STATIC:
case E_LOC_LITERAL:
/* Static symbol or literal, load address */
g_getimmed ((Flags | CF_STATIC) & ~CF_CONST, Expr->Name, Expr->IVal);
break;
case E_LOC_REGISTER:
/* Register variable. Taking the address is usually not
* allowed.
*/
if (IS_Get (&AllowRegVarAddr) == 0) {
Error ("Cannot take the address of a register variable");
}
g_getimmed ((Flags | CF_REGVAR) & ~CF_CONST, Expr->Name, Expr->IVal);
case E_LOC_STACK:
g_leasp (Expr->IVal);
break;
default:
Internal ("Unknown constant type: %04X", Expr->Flags);
}
}
void LoadExpr (unsigned Flags, struct ExprDesc* Expr)
/* Load an expression into the primary register if it is not already there. */
{
if (ED_IsLVal (Expr)) {
/* Dereferenced lvalue */
Flags |= TypeOf (Expr->Type);
if (ED_NeedsTest (Expr)) {
Flags |= CF_TEST;
}
switch (ED_GetLoc (Expr)) {
case E_LOC_ABS:
/* Absolute: numeric address or const */
g_getstatic (Flags | CF_ABSOLUTE, Expr->IVal, 0);
break;
case E_LOC_GLOBAL:
/* Global variable */
g_getstatic (Flags | CF_EXTERNAL, Expr->Name, Expr->IVal);
break;
case E_LOC_STATIC:
case E_LOC_LITERAL:
/* Static variable or literal in the literal pool */
g_getstatic (Flags | CF_STATIC, Expr->Name, Expr->IVal);
break;
case E_LOC_REGISTER:
/* Register variable */
g_getstatic (Flags | CF_REGVAR, Expr->Name, Expr->IVal);
break;
case E_LOC_STACK:
/* Value on the stack */
g_getlocal (Flags, Expr->IVal);
break;
case E_LOC_PRIMARY:
/* The primary register - just test if necessary */
if (Flags & CF_TEST) {
g_test (Flags);
}
break;
case E_LOC_EXPR:
/* Reference to address in primary with offset in Expr */
g_getind (Flags, Expr->IVal);
break;
default:
Internal ("Invalid location in LoadExpr: 0x%04X", ED_GetLoc (Expr));
}
/* Expression was tested */
ED_TestDone (Expr);
} else {
/* An rvalue */
if (ED_IsLocExpr (Expr)) {
if (Expr->IVal != 0) {
/* We have an expression in the primary plus a constant
* offset. Adjust the value in the primary accordingly.
*/
Flags |= TypeOf (Expr->Type);
g_inc (Flags | CF_CONST, Expr->IVal);
}
} else {
/* Constant of some sort, load it into the primary */
LoadConstant (Flags, Expr);
}
/* Are we testing this value? */
if (ED_NeedsTest (Expr)) {
/* Yes, force a test */
Flags |= TypeOf (Expr->Type);
g_test (Flags);
ED_TestDone (Expr);
}
}
}

66
src/cc65/loadexpr.h Normal file
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/*****************************************************************************/
/* */
/* loadexpr.h */
/* */
/* Load an expression into the primary register */
/* */
/* */
/* */
/* (C) 2004 Ullrich von Bassewitz */
/* R<>merstra<72>e 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef LOADEXPR_H
#define LOADEXPR_H
/*****************************************************************************/
/* Forwards */
/*****************************************************************************/
struct ExprDesc;
/*****************************************************************************/
/* Code */
/*****************************************************************************/
void LoadExpr (unsigned Flags, struct ExprDesc* Expr);
/* Load an expression into the primary register if it is not already there. */
/* End of loadexpr.h */
#endif