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Implemented new .PUSHCPU and .POPCPU commands.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4644 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz
2010-04-18 18:47:16 +00:00
parent 922cbf08eb
commit bfd8f4e108
6 changed files with 94 additions and 20 deletions
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47
src/ca65/pseudo.c
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@@ -44,6 +44,7 @@
#include "bitops.h"
#include "cddefs.h"
#include "coll.h"
#include "intstack.h"
#include "symdefs.h"
#include "tgttrans.h"
#include "xmalloc.h"
@@ -86,6 +87,9 @@
/* Keyword we're about to handle */
static StrBuf Keyword = STATIC_STRBUF_INITIALIZER;
/* CPU stack */
static IntStack CPUStack = STATIC_INTSTACK_INITIALIZER;
/* Segment stack */
#define MAX_PUSHED_SEGMENTS 16
static Collection SegStack = STATIC_COLLECTION_INITIALIZER;
@@ -1412,6 +1416,21 @@ static void DoPageLength (void)
static void DoPopCPU (void)
/* Pop an old CPU setting from the CPU stack */
{
/* Must have a CPU on the stack */
if (IS_IsEmpty (&CPUStack)) {
ErrorSkip ("CPU stack is empty");
return;
}
/* Set the CPU to the value popped from stack */
SetCPU (IS_Pop (&CPUStack));
}
static void DoPopSeg (void)
/* Pop an old segment from the segment stack */
{
@@ -1486,6 +1505,21 @@ static void DoPSC02 (void)
static void DoPushCPU (void)
/* Push the current CPU setting onto the CPU stack */
{
/* Can only push a limited size of segments */
if (IS_IsFull (&CPUStack)) {
ErrorSkip ("CPU stack overflow");
return;
}
/* Get the current segment and push it */
IS_Push (&CPUStack, GetCPU ());
}
static void DoPushSeg (void)
/* Push the current segment onto the segment stack */
{
@@ -1865,7 +1899,7 @@ static CtrlDesc CtrlCmdTab [] = {
{ ccNone, DoUnexpected }, /* .MAX */
{ ccNone, DoInvalid }, /* .MID */
{ ccNone, DoUnexpected }, /* .MIN */
{ ccNone, DoNull },
{ ccNone, DoNull },
{ ccNone, DoOrg },
{ ccNone, DoOut },
{ ccNone, DoP02 },
@@ -1873,9 +1907,11 @@ static CtrlDesc CtrlCmdTab [] = {
{ ccNone, DoPageLength },
{ ccNone, DoUnexpected }, /* .PARAMCOUNT */
{ ccNone, DoPC02 },
{ ccNone, DoPopCPU },
{ ccNone, DoPopSeg },
{ ccNone, DoProc },
{ ccNone, DoPSC02 },
{ ccNone, DoPushCPU },
{ ccNone, DoPushSeg },
{ ccNone, DoUnexpected }, /* .REFERENCED */
{ ccNone, DoReloc },
@@ -1944,11 +1980,14 @@ void HandlePseudo (void)
void SegStackCheck (void)
/* Check if the segment stack is empty at end of assembly */
void CheckPseudo (void)
/* Check if the stacks are empty at end of assembly */
{
if (CollCount (&SegStack) != 0) {
Error ("Segment stack is not empty");
Warning (1, "Segment stack is not empty");
}
if (!IS_IsEmpty (&CPUStack)) {
Warning (1, "CPU stack is not empty");
}
}