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Explicitly clear reserved storage with $00.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@50 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2000-06-10 16:32:12 +00:00
parent c8193d6364
commit 2e532d9ccd
1 changed files with 40 additions and 12 deletions
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52
src/cc65/codegen.c
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@ -1,8 +1,35 @@
/*
* codegen.c
*
* Ullrich von Bassewitz, 08.06.1998
*/
/*****************************************************************************/
/* */
/* codegen.c */
/* */
/* 6502 code generator */
/* */
/* */
/* */
/* (C) 1998 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* EMail: uz@musoftware.de */
/* */
/* */
/* 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. */
/* */
/*****************************************************************************/
@ -50,6 +77,7 @@ static char* SegmentHints [4] = {
};
/*****************************************************************************/
/* Helpers */
/*****************************************************************************/
@ -892,7 +920,7 @@ void g_getind (unsigned flags, unsigned offs)
}
void g_leasp (int offs)
/* Fetch the address of the specified symbol into the primary register */
{
@ -905,8 +933,8 @@ void g_leasp (int offs)
AddCodeLine ("\tldx\tsp+1");
} else {
if (FavourSize) {
ldyconst (offs); /* Load Y with offset value */
AddCodeLine ("\tjsr\tleaysp"); /* Load effective address */
ldaconst (offs); /* Load A with offset value */
AddCodeLine ("\tjsr\tleaasp"); /* Load effective address */
} else {
ldaconst (offs);
AddCodeLine ("\tclc");
@ -3578,9 +3606,9 @@ void g_ge (unsigned flags, unsigned long val)
void g_res (unsigned n)
/* reserve static storage, n bytes */
/* Reserve static storage, n bytes */
{
AddCodeLine ("\t.res\t%u", n);
AddCodeLine ("\t.res\t%u,$00", n);
}
@ -3625,7 +3653,7 @@ void g_defdata (unsigned flags, unsigned long val, unsigned offs)
void g_defbytes (const unsigned char* Bytes, unsigned Count)
/* output a row of bytes as a constant */
/* Output a row of bytes as a constant */
{
unsigned Chunk;
char Buf [128];
@ -3660,7 +3688,7 @@ void g_defbytes (const unsigned char* Bytes, unsigned Count)
void g_zerobytes (unsigned n)
/* Output n bytes of data initialized with zero */
{
AddCodeLine ("\t.res\t%u", n);
AddCodeLine ("\t.res\t%u,$00", n);
}