/* */
/* */
/* */
-/* (C) 2001 Ullrich von Bassewitz */
-/* Wacholderweg 14 */
-/* D-70597 Stuttgart */
-/* EMail: uz@cc65.org */
+/* (C) 2001-2009, Ullrich von Bassewitz */
+/* Roemerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* common */
#include "chartype.h"
#include "check.h"
+#include "debugflag.h"
#include "global.h"
#include "hashstr.h"
+#include "strbuf.h"
#include "strutil.h"
#include "xmalloc.h"
-#include "xsprintf.h"
/* cc65 */
#include "asmlabel.h"
#include "codeent.h"
#include "codeinfo.h"
+#include "codeseg.h"
#include "datatype.h"
#include "error.h"
+#include "global.h"
+#include "ident.h"
+#include "output.h"
#include "symentry.h"
-#include "codeseg.h"
-static void CS_PrintFunctionHeader (const CodeSeg* S, FILE* F)
-/* Print a comment with the function signature to the given file */
+static void CS_PrintFunctionHeader (const CodeSeg* S)
+/* Print a comment with the function signature to the output file */
{
/* Get the associated function */
const SymEntry* Func = S->Func;
/* If this is a global code segment, do nothing */
if (Func) {
- fprintf (F,
- "; ---------------------------------------------------------------\n"
- "; ");
- PrintFuncSig (F, Func->Name, Func->Type);
- fprintf (F,
- "\n"
- "; ---------------------------------------------------------------\n"
- "\n");
+ WriteOutput ("; ---------------------------------------------------------------\n"
+ "; ");
+ PrintFuncSig (OutputFile, Func->Name, Func->Type);
+ WriteOutput ("\n"
+ "; ---------------------------------------------------------------\n"
+ "\n");
}
}
-static CodeLabel* CS_AddLabelInternal (CodeSeg* S, const char* Name,
- void (*ErrorFunc) (const char*, ...))
-/* Add a code label for the next instruction to follow */
-{
- /* Calculate the hash from the name */
- unsigned Hash = HashStr (Name) % CS_LABEL_HASH_SIZE;
-
- /* Try to find the code label if it does already exist */
- CodeLabel* L = CS_FindLabel (S, Name, Hash);
-
- /* Did we find it? */
- if (L) {
- /* We found it - be sure it does not already have an owner */
- if (L->Owner) {
- ErrorFunc ("ASM label `%s' is already defined", Name);
- }
- } else {
- /* Not found - create a new one */
- L = CS_NewCodeLabel (S, Name, Hash);
- }
-
- /* Safety. This call is quite costly, but safety is better */
- if (CollIndex (&S->Labels, L) >= 0) {
- ErrorFunc ("ASM label `%s' is already defined", Name);
- }
-
- /* We do now have a valid label. Remember it for later */
- CollAppend (&S->Labels, L);
-
- /* Return the label */
- return L;
-}
-
-
-
/*****************************************************************************/
/* Functions for parsing instructions */
/*****************************************************************************/
* white space, for example.
*/
{
- char Mnemo[64];
- const OPCDesc* OPC;
- am_t AM = 0; /* Initialize to keep gcc silent */
- char Arg[64];
+ char Mnemo[IDENTSIZE+10];
+ const OPCDesc* OPC;
+ am_t AM = 0; /* Initialize to keep gcc silent */
+ char Arg[IDENTSIZE+10];
char Reg;
CodeEntry* E;
- CodeLabel* Label;
+ CodeLabel* Label;
/* Read the first token and skip white space after it */
L = SkipSpace (ReadToken (L, " \t:", Mnemo, sizeof (Mnemo)));
L = SkipSpace (L+1);
/* Add the label */
- CS_AddLabelInternal (S, Mnemo, Error);
+ CS_AddLabel (S, Mnemo);
/* If we have reached end of line, bail out, otherwise a mnemonic
* may follow.
switch (*L) {
case '\0':
- /* Implicit */
- AM = AM65_IMP;
+ /* Implicit or accu */
+ if (OPC->Info & OF_NOIMP) {
+ AM = AM65_ACC;
+ } else {
+ AM = AM65_IMP;
+ }
break;
case '#':
if (*L == ',') {
L = SkipSpace (L+1);
if (toupper (*L) != 'Y') {
- Error ("ASM code error: `Y' expected");
+ Error ("ASM code error: `Y' expected");
return 0;
}
L = SkipSpace (L+1);
if (*L != '\0') {
- Error ("ASM code error: syntax error");
- return 0;
+ Error ("ASM code error: syntax error");
+ return 0;
}
AM = AM65_ZP_INDY;
} else if (*L == '\0') {
} else if (GetZPInfo(Arg) != 0) {
AM = AM65_ZP;
} else {
+ /* Check for subroutine call to local label */
+ if ((OPC->Info & OF_CALL) && IsLocalLabelName (Arg)) {
+ Error ("ASM code error: "
+ "Cannot use local label `%s' in subroutine call",
+ Arg);
+ }
AM = AM65_ABS;
}
} else if (*L == ',') {
Reg = toupper (*L);
L = SkipSpace (L+1);
if (Reg == 'X') {
- if (GetZPInfo(Arg) != 0) {
- AM = AM65_ZPX;
- } else {
- AM = AM65_ABSX;
- }
+ if (GetZPInfo(Arg) != 0) {
+ AM = AM65_ZPX;
+ } else {
+ AM = AM65_ABSX;
+ }
} else if (Reg == 'Y') {
- AM = AM65_ABSY;
+ AM = AM65_ABSY;
} else {
- Error ("ASM code error: syntax error");
- return 0;
+ Error ("ASM code error: syntax error");
+ return 0;
}
if (*L != '\0') {
- Error ("ASM code error: syntax error");
- return 0;
+ Error ("ASM code error: syntax error");
+ return 0;
}
}
}
/* Create a new code segment, initialize and return it */
{
unsigned I;
- const type* RetType;
+ const Type* RetType;
/* Allocate memory */
CodeSeg* S = xmalloc (sizeof (CodeSeg));
S->ExitRegs = REG_NONE;
}
+ /* Copy the global optimization settings */
+ S->Optimize = (unsigned char) IS_Get (&Optimize);
+ S->CodeSizeFactor = (unsigned) IS_Get (&CodeSizeFactor);
+
/* Return the new struct */
return S;
}
{
const char* L;
CodeEntry* E;
- char Token[64];
+ char Token[IDENTSIZE+10];
/* Format the line */
- char Buf [256];
- xvsprintf (Buf, sizeof (Buf), Format, ap);
+ StrBuf Buf = STATIC_STRBUF_INITIALIZER;
+ SB_VPrintf (&Buf, Format, ap);
/* Skip whitespace */
- L = SkipSpace (Buf);
+ L = SkipSpace (SB_GetConstBuf (&Buf));
/* Check which type of instruction we have */
- E = 0; /* Assume no insn created */
+ E = 0; /* Assume no insn created */
switch (*L) {
case '\0':
if (E) {
CS_AddEntry (S, E);
}
+
+ /* Cleanup the string buffer */
+ SB_Done (&Buf);
}
/* Delete an entry from the code segment. This includes moving any associated
* labels, removing references to labels and even removing the referenced labels
* if the reference count drops to zero.
+ * Note: Labels are moved forward if possible, that is, they are moved to the
+ * next insn (not the preceeding one).
*/
{
/* Get the code entry for the given index */
CodeLabel* CS_AddLabel (CodeSeg* S, const char* Name)
/* Add a code label for the next instruction to follow */
{
- return CS_AddLabelInternal (S, Name, Internal);
+ /* Calculate the hash from the name */
+ unsigned Hash = HashStr (Name) % CS_LABEL_HASH_SIZE;
+
+ /* Try to find the code label if it does already exist */
+ CodeLabel* L = CS_FindLabel (S, Name, Hash);
+
+ /* Did we find it? */
+ if (L) {
+ /* We found it - be sure it does not already have an owner */
+ if (L->Owner) {
+ Error ("ASM label `%s' is already defined", Name);
+ return L;
+ }
+ } else {
+ /* Not found - create a new one */
+ L = CS_NewCodeLabel (S, Name, Hash);
+ }
+
+ /* Safety. This call is quite costly, but safety is better */
+ if (CollIndex (&S->Labels, L) >= 0) {
+ Error ("ASM label `%s' is already defined", Name);
+ return L;
+ }
+
+ /* We do now have a valid label. Remember it for later */
+ CollAppend (&S->Labels, L);
+
+ /* Return the label */
+ return L;
}
/* Get the insn referencing this label */
CodeEntry* E = CollAt (&L->JumpFrom, I);
/* Remove the reference */
- E->JumpTo = 0;
+ CE_ClearJumpTo (E);
}
CollDeleteAll (&L->JumpFrom);
for (J = 0; J < CL_GetRefCount (X); ++J) {
/* Get the entry referencing this label */
CodeEntry* E = CL_GetRef (X, J);
- /* And remove the reference */
+ /* And remove the reference. Do NOT call CE_ClearJumpTo
+ * here, because this will also clear the label name,
+ * which is not what we want.
+ */
E->JumpTo = 0;
}
CollDeleteItem (&L->JumpFrom, E);
/* The entry jumps no longer to L */
- E->JumpTo = 0;
+ CE_ClearJumpTo (E);
/* If there are no more references, delete the label */
if (CollCount (&L->JumpFrom) == 0) {
+void CS_DelCodeRange (CodeSeg* S, unsigned First, unsigned Last)
+/* Delete all entries between first and last, both inclusive. The function
+ * can only handle basic blocks (First is the only entry, Last the only exit)
+ * and no open labels. It will call FAIL if any of these preconditions are
+ * violated.
+ */
+{
+ unsigned I;
+ CodeEntry* FirstEntry;
+
+ /* Do some sanity checks */
+ CHECK (First <= Last && Last < CS_GetEntryCount (S));
+
+ /* If Last is actually the last insn, call CS_DelCodeAfter instead, which
+ * is more flexible in this case.
+ */
+ if (Last == CS_GetEntryCount (S) - 1) {
+ CS_DelCodeAfter (S, First);
+ return;
+ }
+
+ /* Get the first entry and check if it has any labels. If it has, move
+ * them to the insn following Last. If Last is the last insn of the code
+ * segment, make them ownerless and move them to the label pool.
+ */
+ FirstEntry = CS_GetEntry (S, First);
+ if (CE_HasLabel (FirstEntry)) {
+ /* Get the entry following last */
+ CodeEntry* FollowingEntry = CS_GetNextEntry (S, Last);
+ if (FollowingEntry) {
+ /* There is an entry after Last - move the labels */
+ CS_MoveLabels (S, FirstEntry, FollowingEntry);
+ } else {
+ /* Move the labels to the pool and clear the owner pointer */
+ CS_MoveLabelsToPool (S, FirstEntry);
+ }
+ }
+
+ /* First pass: Delete all references to labels. If the reference count
+ * for a label drops to zero, delete it.
+ */
+ for (I = Last; I >= First; --I) {
+
+ /* Get the next entry */
+ CodeEntry* E = CS_GetEntry (S, I);
+
+ /* Check if this entry has a label reference */
+ if (E->JumpTo) {
+
+ /* If the label is a label in the label pool, this is an error */
+ CodeLabel* L = E->JumpTo;
+ CHECK (CollIndex (&S->Labels, L) < 0);
+
+ /* Remove the reference to the label */
+ CS_RemoveLabelRef (S, E);
+ }
+ }
+
+ /* Second pass: Delete the instructions. If a label attached to an
+ * instruction still has references, it must be references from outside
+ * the deleted area, which is an error.
+ */
+ for (I = Last; I >= First; --I) {
+
+ /* Get the next entry */
+ CodeEntry* E = CS_GetEntry (S, I);
+
+ /* Check if this entry has a label attached */
+ CHECK (!CE_HasLabel (E));
+
+ /* Delete the pointer to the entry */
+ CollDelete (&S->Entries, I);
+
+ /* Delete the entry itself */
+ FreeCodeEntry (E);
+ }
+}
+
+
+
void CS_DelCodeAfter (CodeSeg* S, unsigned Last)
/* Delete all entries including the given one */
{
-void CS_OutputPrologue (const CodeSeg* S, FILE* F)
+void CS_ResetMarks (CodeSeg* S, unsigned First, unsigned Last)
+/* Remove all user marks from the entries in the given range */
+{
+ while (First <= Last) {
+ CE_ResetMark (CS_GetEntry (S, First++));
+ }
+}
+
+
+
+int CS_IsBasicBlock (CodeSeg* S, unsigned First, unsigned Last)
+/* Check if the given code segment range is a basic block. That is, check if
+ * First is the only entrance and Last is the only exit. This means that no
+ * jump/branch inside the block may jump to an insn below First or after(!)
+ * Last, and that no insn may jump into this block from the outside.
+ */
+{
+ unsigned I;
+
+ /* Don't accept invalid ranges */
+ CHECK (First <= Last);
+
+ /* First pass: Walk over the range and remove all marks from the entries */
+ CS_ResetMarks (S, First, Last);
+
+ /* Second pass: Walk over the range checking all labels. Note: There may be
+ * label on the first insn which is ok.
+ */
+ I = First + 1;
+ while (I <= Last) {
+
+ /* Get the next entry */
+ CodeEntry* E = CS_GetEntry (S, I);
+
+ /* Check if this entry has one or more labels, if so, check which
+ * entries jump to this label.
+ */
+ unsigned LabelCount = CE_GetLabelCount (E);
+ unsigned LabelIndex;
+ for (LabelIndex = 0; LabelIndex < LabelCount; ++LabelIndex) {
+
+ /* Get this label */
+ CodeLabel* L = CE_GetLabel (E, LabelIndex);
+
+ /* Walk over all entries that jump to this label. Check for each
+ * of the entries if it is out of the range.
+ */
+ unsigned RefCount = CL_GetRefCount (L);
+ unsigned RefIndex;
+ for (RefIndex = 0; RefIndex < RefCount; ++RefIndex) {
+
+ /* Get the code entry that jumps here */
+ CodeEntry* Ref = CL_GetRef (L, RefIndex);
+
+ /* Walk over out complete range and check if we find the
+ * refering entry. This is cheaper than using CS_GetEntryIndex,
+ * because CS_GetEntryIndex will search the complete code
+ * segment and not just our range.
+ */
+ unsigned J;
+ for (J = First; J <= Last; ++J) {
+ if (Ref == CS_GetEntry (S, J)) {
+ break;
+ }
+ }
+ if (J > Last) {
+ /* We did not find the entry. This means that the jump to
+ * out code segment entry E came from outside the range,
+ * which in turn means that the given range is not a basic
+ * block.
+ */
+ CS_ResetMarks (S, First, Last);
+ return 0;
+ }
+
+ /* If we come here, we found the entry. Mark it, so we know
+ * that the branch to the label is in range.
+ */
+ CE_SetMark (Ref);
+ }
+ }
+
+ /* Next entry */
+ ++I;
+ }
+
+ /* Third pass: Walk again over the range and check all branches. If we
+ * find a branch that is not marked, its target is not inside the range
+ * (since we checked all the labels in the range before).
+ */
+ I = First;
+ while (I <= Last) {
+
+ /* Get the next entry */
+ CodeEntry* E = CS_GetEntry (S, I);
+
+ /* Check if this is a branch and if so, if it has a mark */
+ if (E->Info & (OF_UBRA | OF_CBRA)) {
+ if (!CE_HasMark (E)) {
+ /* No mark means not a basic block. Before bailing out, be sure
+ * to remove the marks from the remaining entries.
+ */
+ CS_ResetMarks (S, I+1, Last);
+ return 0;
+ }
+
+ /* Remove the mark */
+ CE_ResetMark (E);
+ }
+
+ /* Next entry */
+ ++I;
+ }
+
+ /* Done - this is a basic block */
+ return 1;
+}
+
+
+
+void CS_OutputPrologue (const CodeSeg* S)
/* If the given code segment is a code segment for a function, output the
* assembler prologue into the file. That is: Output a comment header, switch
* to the correct segment and enter the local function scope. If the code
* segment before outputing the function label.
*/
if (Func) {
- CS_PrintFunctionHeader (S, F);
- fprintf (F, ".segment\t\"%s\"\n\n.proc\t_%s\n\n", S->SegName, Func->Name);
+ /* Get the function descriptor */
+ CS_PrintFunctionHeader (S);
+ WriteOutput (".segment\t\"%s\"\n\n.proc\t_%s", S->SegName, Func->Name);
+ if (IsQualNear (Func->Type)) {
+ WriteOutput (": near");
+ } else if (IsQualFar (Func->Type)) {
+ WriteOutput (": far");
+ }
+ WriteOutput ("\n\n");
}
}
-void CS_OutputEpilogue (const CodeSeg* S, FILE* F)
+void CS_OutputEpilogue (const CodeSeg* S)
/* If the given code segment is a code segment for a function, output the
* assembler epilogue into the file. That is: Close the local function scope.
*/
{
if (S->Func) {
- fprintf (F, "\n.endproc\n\n");
+ WriteOutput ("\n.endproc\n\n");
}
}
-void CS_Output (const CodeSeg* S, FILE* F)
-/* Output the code segment data to a file */
+void CS_Output (CodeSeg* S)
+/* Output the code segment data to the output file */
{
unsigned I;
const LineInfo* LI;
return;
}
+ /* Generate register info */
+ CS_GenRegInfo (S);
+
/* Output the segment directive */
- fprintf (F, ".segment\t\"%s\"\n\n", S->SegName);
+ WriteOutput (".segment\t\"%s\"\n\n", S->SegName);
/* Output all entries, prepended by the line information if it has changed */
LI = 0;
for (I = 0; I < Count; ++I) {
- /* Get the next entry */
- const CodeEntry* E = CollConstAt (&S->Entries, I);
- /* Check if the line info has changed. If so, output the source line
- * if the option is enabled and output debug line info if the debug
- * option is enabled.
- */
- if (E->LI != LI) {
- /* Line info has changed, remember the new line info */
- LI = E->LI;
-
- /* Add the source line as a comment */
- if (AddSource) {
- fprintf (F, ";\n; %s\n;\n", LI->Line);
- }
-
- /* Add line debug info */
+ /* Get the next entry */
+ const CodeEntry* E = CollConstAt (&S->Entries, I);
+ /* Check if the line info has changed. If so, output the source line
+ * if the option is enabled and output debug line info if the debug
+ * option is enabled.
+ */
+ if (E->LI != LI) {
+ /* Line info has changed, remember the new line info */
+ LI = E->LI;
+
+ /* Add the source line as a comment. Beware: When line continuation
+ * was used, the line may contain newlines.
+ */
+ if (AddSource) {
+ const char* L = LI->Line;
+ WriteOutput (";\n; ");
+ while (*L) {
+ const char* N = strchr (L, '\n');
+ if (N) {
+ /* We have a newline, just write the first part */
+ WriteOutput ("%.*s\n; ", (int) (N - L), L);
+ L = N+1;
+ } else {
+ /* No Newline, write as is */
+ WriteOutput ("%s\n", L);
+ break;
+ }
+ }
+ WriteOutput (";\n");
+ }
+
+ /* Add line debug info */
if (DebugInfo) {
- fprintf (F, "\t.dbg\tline, \"%s\", %u\n",
- GetInputName (LI), GetInputLine (LI));
+ WriteOutput ("\t.dbg\tline, \"%s\", %u\n",
+ GetInputName (LI), GetInputLine (LI));
}
}
/* Output the code */
- CE_Output (E, F);
+ CE_Output (E);
}
/* If debug info is enabled, terminate the last line number information */
if (DebugInfo) {
- fprintf (F, "\t.dbg\tline\n");
+ WriteOutput ("\t.dbg\tline\n");
}
+
+ /* Free register info */
+ CS_FreeRegInfo (S);
}
break;
}
if (J->RI->Out2.RegA != Regs.RegA) {
- Regs.RegA = -1;
+ Regs.RegA = UNKNOWN_REGVAL;
}
if (J->RI->Out2.RegX != Regs.RegX) {
- Regs.RegX = -1;
+ Regs.RegX = UNKNOWN_REGVAL;
}
if (J->RI->Out2.RegY != Regs.RegY) {
- Regs.RegY = -1;
+ Regs.RegY = UNKNOWN_REGVAL;
}
if (J->RI->Out2.SRegLo != Regs.SRegLo) {
- Regs.SRegLo = -1;
+ Regs.SRegLo = UNKNOWN_REGVAL;
}
if (J->RI->Out2.SRegHi != Regs.SRegHi) {
- Regs.SRegHi = -1;
+ Regs.SRegHi = UNKNOWN_REGVAL;
+ }
+ if (J->RI->Out2.Tmp1 != Regs.Tmp1) {
+ Regs.Tmp1 = UNKNOWN_REGVAL;
}
++Entry;
}
/* Check the previous instruction */
switch (P->OPC) {
- case OP65_ADC:
+ case OP65_ADC:
case OP65_AND:
case OP65_DEA:
case OP65_EOR:
/* A is zero in one execution flow direction */
if (BC == BC_EQ) {
E->RI->Out2.RegA = 0;
- } else {
+ } else {
E->RI->Out.RegA = 0;
}
break;
/* If this is an immidiate compare, the A register has
* the value of the compare later.
*/
- if (CE_KnownImm (P)) {
+ if (CE_IsConstImm (P)) {
if (BC == BC_EQ) {
E->RI->Out2.RegA = (unsigned char)P->Num;
} else {
E->RI->Out.RegA = (unsigned char)P->Num;
- }
+ }
}
break;
/* If this is an immidiate compare, the X register has
* the value of the compare later.
*/
- if (CE_KnownImm (P)) {
+ if (CE_IsConstImm (P)) {
if (BC == BC_EQ) {
E->RI->Out2.RegX = (unsigned char)P->Num;
} else {
case OP65_CPY:
/* If this is an immidiate compare, the Y register has
* the value of the compare later.
- */
- if (CE_KnownImm (P)) {
+ */
+ if (CE_IsConstImm (P)) {
if (BC == BC_EQ) {
E->RI->Out2.RegY = (unsigned char)P->Num;
} else {
E->RI->Out2.RegX = 0;
} else {
E->RI->Out.RegX = 0;
- }
+ }
break;
case OP65_DEY:
projects / cc65 / blobdiff