/* */
/* */
/* */
-/* (C) 1998-2009 Ullrich von Bassewitz */
-/* Roemerstrasse 52 */
-/* D-70794 Filderstadt */
-/* EMail: uz@cc65.org */
+/* (C) 1998-2009, Ullrich von Bassewitz */
+/* Roemerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
#include "check.h"
#include "cpu.h"
#include "strbuf.h"
-#include "version.h"
#include "xmalloc.h"
#include "xsprintf.h"
+#include "version.h"
/* cc65 */
#include "asmcode.h"
void g_preamble (void)
/* Generate the assembler code preamble */
{
- /* Create a new (global) segment list and remember it */
- PushSegments (0);
- GS = CS;
-
/* Identify the compiler version */
AddTextLine (";");
- AddTextLine ("; File generated by cc65 v %u.%u.%u",
- VER_MAJOR, VER_MINOR, VER_PATCH);
+ AddTextLine ("; File generated by cc65 v %s", GetVersionAsString ());
AddTextLine (";");
/* Insert some object file options */
- AddTextLine ("\t.fopt\t\tcompiler,\"cc65 v %u.%u.%u\"",
- VER_MAJOR, VER_MINOR, VER_PATCH);
+ AddTextLine ("\t.fopt\t\tcompiler,\"cc65 v %s\"",
+ GetVersionAsString ());
/* If we're producing code for some other CPU, switch the command set */
switch (CPU) {
+void g_aliasdatalabel (unsigned label, unsigned baselabel, long offs)
+/* Define label as a local alias for baselabel+offs */
+{
+ /* We need an intermediate buffer here since LocalLabelName uses a
+ * static buffer which changes with each call.
+ */
+ StrBuf L = AUTO_STRBUF_INITIALIZER;
+ SB_AppendStr (&L, LocalLabelName (label));
+ SB_Terminate (&L);
+ AddDataLine ("%s\t:=\t%s+%ld",
+ SB_GetConstBuf (&L),
+ LocalLabelName (baselabel),
+ offs);
+ SB_Done (&L);
+}
+
+
+
/*****************************************************************************/
/* Functions handling global labels */
/*****************************************************************************/
-/*****************************************************************************/
-/* Load functions for various registers */
-/*****************************************************************************/
-
-
-
-static void ldaconst (unsigned val)
-/* Load a with a constant */
-{
- AddCodeLine ("lda #$%02X", val & 0xFF);
-}
-
-
-
-static void ldxconst (unsigned val)
-/* Load x with a constant */
-{
- AddCodeLine ("ldx #$%02X", val & 0xFF);
-}
-
-
-
-static void ldyconst (unsigned val)
-/* Load y with a constant */
-{
- AddCodeLine ("ldy #$%02X", val & 0xFF);
-}
-
-
-
/*****************************************************************************/
/* Function entry and exit */
/*****************************************************************************/
/* Function epilogue */
{
/* How many bytes of locals do we have to drop? */
- unsigned k = (unsigned) -StackPtr;
+ unsigned ToDrop = (unsigned) -StackPtr;
/* If we didn't have a variable argument list, don't call leave */
if (funcargs >= 0) {
- /* Drop stackframe if needed. We can only drop 255 bytes at a time. */
- k += funcargs;
- while (k > 0) {
- unsigned ToDrop = (k > 255)? 255 : k;
- if (ToDrop <= 8) {
- AddCodeLine ("jsr incsp%d", k);
- } else {
- ldyconst (ToDrop);
- AddCodeLine ("jsr addysp");
- }
- k -= ToDrop;
- }
+ /* Drop stackframe if needed */
+ g_drop (ToDrop + funcargs);
- } else {
+ } else if (StackPtr != 0) {
- if (k == 0) {
- /* Nothing to drop */
+ /* We've a stack frame to drop */
+ if (ToDrop > 255) {
+ g_drop (ToDrop); /* Inlines the code */
AddCodeLine ("jsr leave");
} else {
- /* We've a stack frame to drop */
- while (k > 255) {
- ldyconst (255);
- AddCodeLine ("jsr addysp");
- k -= 255;
- }
- ldyconst (k);
+ AddCodeLine ("ldy #$%02X", ToDrop);
AddCodeLine ("jsr leavey");
}
+
+ } else {
+
+ /* Nothing to drop */
+ AddCodeLine ("jsr leave");
+
}
/* Add the final rts */
CheckLocalOffs (StackOffs);
/* Generate code */
+ AddCodeLine ("ldy #$%02X", StackOffs & 0xFF);
if (Bytes == 1) {
if (IS_Get (&CodeSizeFactor) < 165) {
- ldyconst (StackOffs);
- ldxconst (RegOffs);
+ AddCodeLine ("ldx #$%02X", RegOffs & 0xFF);
AddCodeLine ("jsr regswap1");
} else {
- ldyconst (StackOffs);
AddCodeLine ("lda (sp),y");
AddCodeLine ("ldx regbank%+d", RegOffs);
AddCodeLine ("sta regbank%+d", RegOffs);
} else if (Bytes == 2) {
- ldyconst (StackOffs);
- ldxconst (RegOffs);
+ AddCodeLine ("ldx #$%02X", RegOffs & 0xFF);
AddCodeLine ("jsr regswap2");
} else {
- ldyconst (StackOffs);
- ldxconst (RegOffs);
- ldaconst (Bytes);
+ AddCodeLine ("ldx #$%02X", RegOffs & 0xFF);
+ AddCodeLine ("lda #$%02X", Bytes & 0xFF);
AddCodeLine ("jsr regswap");
}
}
/* More than two bytes - loop */
unsigned Label = GetLocalLabel ();
g_space (Bytes);
- ldyconst (Bytes - 1);
- ldxconst (Bytes);
+ AddCodeLine ("ldy #$%02X", (unsigned char) (Bytes - 1));
+ AddCodeLine ("ldx #$%02X", (unsigned char) Bytes);
g_defcodelabel (Label);
AddCodeLine ("lda regbank%+d,x", RegOffs-1);
AddCodeLine ("sta (sp),y");
/* Don't loop for up to two bytes */
if (Bytes == 1) {
- ldyconst (StackOffs);
+ AddCodeLine ("ldy #$%02X", StackOffs);
AddCodeLine ("lda (sp),y");
AddCodeLine ("sta regbank%+d", RegOffs);
} else if (Bytes == 2) {
- ldyconst (StackOffs);
+ AddCodeLine ("ldy #$%02X", StackOffs);
AddCodeLine ("lda (sp),y");
AddCodeLine ("sta regbank%+d", RegOffs);
AddCodeLine ("iny");
} else if (Bytes == 3 && IS_Get (&CodeSizeFactor) >= 133) {
- ldyconst (StackOffs);
+ AddCodeLine ("ldy #$%02X", StackOffs);
AddCodeLine ("lda (sp),y");
AddCodeLine ("sta regbank%+d", RegOffs);
AddCodeLine ("iny");
* code that uses just one index register.
*/
unsigned Label = GetLocalLabel ();
- ldyconst (StackOffs);
+ AddCodeLine ("ldy #$%02X", StackOffs);
g_defcodelabel (Label);
AddCodeLine ("lda (sp),y");
AddCodeLine ("sta regbank%+d,y", RegOffs - StackOffs);
*/
unsigned Label = GetLocalLabel ();
AddCodeLine ("stx tmp1");
- ldyconst (StackOffs + Bytes - 1);
- ldxconst (Bytes - 1);
+ AddCodeLine ("ldy #$%02X", (unsigned char) (StackOffs + Bytes - 1));
+ AddCodeLine ("ldx #$%02X", (unsigned char) (Bytes - 1));
g_defcodelabel (Label);
AddCodeLine ("lda (sp),y");
AddCodeLine ("sta regbank%+d,x", RegOffs);
case CF_CHAR:
if ((Flags & CF_FORCECHAR) != 0) {
- ldaconst (Val);
+ AddCodeLine ("lda #$%02X", (unsigned char) Val);
break;
}
/* FALL THROUGH */
case CF_INT:
- ldxconst ((Val >> 8) & 0xFF);
- ldaconst (Val & 0xFF);
+ AddCodeLine ("ldx #$%02X", (unsigned char) (Val >> 8));
+ AddCodeLine ("lda #$%02X", (unsigned char) Val);
break;
case CF_LONG:
if ((flags & CF_FORCECHAR) || (flags & CF_TEST)) {
AddCodeLine ("lda %s", lbuf); /* load A from the label */
} else {
- ldxconst (0);
+ AddCodeLine ("ldx #$00");
AddCodeLine ("lda %s", lbuf); /* load A from the label */
if (!(flags & CF_UNSIGNED)) {
/* Must sign extend */
case CF_CHAR:
CheckLocalOffs (Offs);
if ((Flags & CF_FORCECHAR) || (Flags & CF_TEST)) {
- ldyconst (Offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("lda (sp),y");
} else {
- ldyconst (Offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("ldx #$00");
AddCodeLine ("lda (sp),y");
if ((Flags & CF_UNSIGNED) == 0) {
AddCodeLine ("lda (sp),y");
AddCodeLine ("dey");
AddCodeLine ("ora (sp),y");
- } else if (IS_Get (&CodeSizeFactor) < 165) {
- AddCodeLine ("jsr ldaxysp");
} else {
- AddCodeLine ("lda (sp),y");
- AddCodeLine ("tax");
- AddCodeLine ("dey");
- AddCodeLine ("lda (sp),y");
+ AddCodeLine ("jsr ldaxysp");
}
break;
case CF_CHAR:
/* Character sized */
+ AddCodeLine ("ldy #$%02X", Offs);
if (Flags & CF_UNSIGNED) {
- ldyconst (Offs);
AddCodeLine ("jsr ldauidx");
} else {
- ldyconst (Offs);
AddCodeLine ("jsr ldaidx");
}
break;
case CF_INT:
if (Flags & CF_TEST) {
- ldyconst (Offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("sta ptr1");
AddCodeLine ("stx ptr1+1");
AddCodeLine ("lda (ptr1),y");
AddCodeLine ("iny");
AddCodeLine ("ora (ptr1),y");
} else {
- ldyconst (Offs+1);
+ AddCodeLine ("ldy #$%02X", Offs+1);
AddCodeLine ("jsr ldaxidx");
}
break;
case CF_LONG:
- ldyconst (Offs+3);
+ AddCodeLine ("ldy #$%02X", Offs+3);
AddCodeLine ("jsr ldeaxidx");
if (Flags & CF_TEST) {
g_test (Flags);
void g_leasp (int Offs)
/* Fetch the address of the specified symbol into the primary register */
{
- /* Get low and high byte */
- unsigned char Lo = (unsigned char) Offs;
- unsigned char Hi = (unsigned char) (Offs >> 8);
+ unsigned char Lo, Hi;
/* Calculate the offset relative to sp */
Offs -= StackPtr;
+ /* Get low and high byte */
+ Lo = (unsigned char) Offs;
+ Hi = (unsigned char) (Offs >> 8);
+
/* Generate code */
if (Lo == 0) {
if (Hi <= 3) {
/* Full 16 bit offset inlined */
AddCodeLine ("lda sp");
AddCodeLine ("clc");
- AddCodeLine ("adc #$%02X", (unsigned char) Offs);
+ AddCodeLine ("adc #$%02X", Lo);
AddCodeLine ("pha");
AddCodeLine ("lda sp+1");
- AddCodeLine ("adc #$%02X", (unsigned char) (Offs >> 8));
+ AddCodeLine ("adc #$%02X", Hi);
AddCodeLine ("tax");
AddCodeLine ("pla");
}
CheckLocalOffs (ArgSizeOffs);
/* Get the size of all parameters. */
- ldyconst (ArgSizeOffs);
+ AddCodeLine ("ldy #$%02X", ArgSizeOffs);
AddCodeLine ("lda (sp),y");
/* Add the value of the stackpointer */
if (Flags & CF_CONST) {
AddCodeLine ("lda #$%02X", (unsigned char) Val);
}
- ldyconst (Offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("sta (sp),y");
break;
case CF_INT:
if (Flags & CF_CONST) {
- ldyconst (Offs+1);
+ AddCodeLine ("ldy #$%02X", Offs+1);
AddCodeLine ("lda #$%02X", (unsigned char) (Val >> 8));
AddCodeLine ("sta (sp),y");
if ((Flags & CF_NOKEEP) == 0) {
}
AddCodeLine ("sta (sp),y");
} else {
+ AddCodeLine ("ldy #$%02X", Offs);
if ((Flags & CF_NOKEEP) == 0 || IS_Get (&CodeSizeFactor) < 160) {
- ldyconst (Offs);
AddCodeLine ("jsr staxysp");
} else {
- ldyconst (Offs);
AddCodeLine ("sta (sp),y");
AddCodeLine ("iny");
AddCodeLine ("txa");
if (Flags & CF_CONST) {
g_getimmed (Flags, Val, 0);
}
- ldyconst (Offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("jsr steaxysp");
break;
}
/* Check the size and determine operation */
+ AddCodeLine ("ldy #$%02X", Offs);
switch (Flags & CF_TYPE) {
case CF_CHAR:
- ldyconst (Offs);
AddCodeLine ("jsr staspidx");
break;
case CF_INT:
- ldyconst (Offs);
AddCodeLine ("jsr staxspidx");
break;
case CF_LONG:
- ldyconst (Offs);
AddCodeLine ("jsr steaxspidx");
break;
case CF_INT:
if (Flags & CF_UNSIGNED) {
if (IS_Get (&CodeSizeFactor) >= 200) {
- ldyconst (0);
+ AddCodeLine ("ldy #$00");
AddCodeLine ("sty sreg");
AddCodeLine ("sty sreg+1");
} else {
-void g_addeqlocal (unsigned flags, int offs, unsigned long val)
+void g_addeqlocal (unsigned flags, int Offs, unsigned long val)
/* Emit += for a local variable */
{
/* Calculate the true offset, check it, load it into Y */
- offs -= StackPtr;
- CheckLocalOffs (offs);
+ Offs -= StackPtr;
+ CheckLocalOffs (Offs);
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
- ldyconst (offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("ldx #$00");
if (flags & CF_CONST) {
AddCodeLine ("clc");
/* FALLTHROUGH */
case CF_INT:
- ldyconst (offs);
+ AddCodeLine ("ldy #$%02X", Offs);
if (flags & CF_CONST) {
if (IS_Get (&CodeSizeFactor) >= 400) {
AddCodeLine ("clc");
if (flags & CF_CONST) {
g_getimmed (flags, val, 0);
}
- ldyconst (offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("jsr laddeqysp");
break;
-void g_subeqlocal (unsigned flags, int offs, unsigned long val)
+void g_subeqlocal (unsigned flags, int Offs, unsigned long val)
/* Emit -= for a local variable */
{
/* Calculate the true offset, check it, load it into Y */
- offs -= StackPtr;
- CheckLocalOffs (offs);
+ Offs -= StackPtr;
+ CheckLocalOffs (Offs);
/* Check the size and determine operation */
switch (flags & CF_TYPE) {
case CF_CHAR:
if (flags & CF_FORCECHAR) {
- ldyconst (offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("ldx #$00");
if (flags & CF_CONST) {
AddCodeLine ("lda (sp),y");
if (flags & CF_CONST) {
g_getimmed (flags, val, 0);
}
- ldyconst (offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("jsr subeqysp");
break;
if (flags & CF_CONST) {
g_getimmed (flags, val, 0);
}
- ldyconst (offs);
+ AddCodeLine ("ldy #$%02X", Offs);
AddCodeLine ("jsr lsubeqysp");
break;
if ((flags & CF_TYPE) == CF_CHAR && (flags & CF_FORCECHAR)) {
/* Handle as 8 bit value */
- ldaconst (val);
+ AddCodeLine ("lda #$%02X", (unsigned char) val);
AddCodeLine ("jsr pusha");
} else {
{
if ((Flags & CF_FIXARGC) == 0) {
/* Pass the argument count */
- ldyconst (ArgSize);
+ AddCodeLine ("ldy #$%02X", ArgSize);
}
AddCodeLine ("jsr _%s", Label);
StackPtr += ArgSize; /* callee pops args */
/* Address is in a/x */
if ((Flags & CF_FIXARGC) == 0) {
/* Pass arg count */
- ldyconst (ArgSize);
+ AddCodeLine ("ldy #$%02X", ArgSize);
}
AddCodeLine ("jsr callax");
} else {
-static void mod_internal (int k, char* verb1, char* verb2)
+void g_drop (unsigned Space)
+/* Drop space allocated on the stack */
{
- if (k <= 8) {
- AddCodeLine ("jsr %ssp%c", verb1, k + '0');
- } else {
- CheckLocalOffs (k);
- ldyconst (k);
- AddCodeLine ("jsr %ssp", verb2);
+ if (Space > 255) {
+ /* Inline the code since calling addysp repeatedly is quite some
+ * overhead.
+ */
+ AddCodeLine ("pha");
+ AddCodeLine ("lda #$%02X", (unsigned char) Space);
+ AddCodeLine ("clc");
+ AddCodeLine ("adc sp");
+ AddCodeLine ("sta sp");
+ AddCodeLine ("lda #$%02X", (unsigned char) (Space >> 8));
+ AddCodeLine ("adc sp+1");
+ AddCodeLine ("sta sp+1");
+ AddCodeLine ("pla");
+ } else if (Space > 8) {
+ AddCodeLine ("ldy #$%02X", Space);
+ AddCodeLine ("jsr addysp");
+ } else if (Space != 0) {
+ AddCodeLine ("jsr incsp%u", Space);
}
}
-void g_space (int space)
+void g_space (int Space)
/* Create or drop space on the stack */
{
- if (space < 0) {
- mod_internal (-space, "inc", "addy");
- } else if (space > 0) {
- mod_internal (space, "dec", "suby");
+ if (Space < 0) {
+ /* This is actually a drop operation */
+ g_drop (-Space);
+ } else if (Space > 255) {
+ /* Inline the code since calling subysp repeatedly is quite some
+ * overhead.
+ */
+ AddCodeLine ("pha");
+ AddCodeLine ("lda sp");
+ AddCodeLine ("sec");
+ AddCodeLine ("sbc #$%02X", (unsigned char) Space);
+ AddCodeLine ("sta sp");
+ AddCodeLine ("lda sp+1");
+ AddCodeLine ("sbc #$%02X", (unsigned char) (Space >> 8));
+ AddCodeLine ("sta sp+1");
+ AddCodeLine ("pla");
+ } else if (Space > 8) {
+ AddCodeLine ("ldy #$%02X", Space);
+ AddCodeLine ("jsr subysp");
+ } else if (Space != 0) {
+ AddCodeLine ("jsr decsp%u", Space);
}
}
if ((val & 0xFF) != 0) {
AddCodeLine ("ora #$%02X", (unsigned char)val);
}
- ldxconst (0xFF);
+ AddCodeLine ("ldx #$FF");
} else if (val != 0) {
AddCodeLine ("ora #$%02X", (unsigned char)val);
AddCodeLine ("pha");
case CF_INT:
if ((Val & 0xFFFF) != 0xFFFF) {
if (Val <= 0xFF) {
- ldxconst (0);
+ AddCodeLine ("ldx #$00");
if (Val == 0) {
AddCodeLine ("lda #$00");
} else if (Val != 0xFF) {
case CF_LONG:
if (Val <= 0xFF) {
- ldxconst (0);
+ AddCodeLine ("ldx #$00");
AddCodeLine ("stx sreg+1");
AddCodeLine ("stx sreg");
if ((Val & 0xFF) != 0xFF) {
}
return;
} else if (Val == 0xFF00) {
- ldaconst (0);
+ AddCodeLine ("lda #$00");
AddCodeLine ("sta sreg+1");
AddCodeLine ("sta sreg");
return;
if (val >= 8) {
if (flags & CF_UNSIGNED) {
AddCodeLine ("txa");
- ldxconst (0);
+ AddCodeLine ("ldx #$00");
} else {
unsigned L = GetLocalLabel();
AddCodeLine ("cpx #$80"); /* Sign bit into carry */
if (val <= 8) {
AddCodeLine ("jsr incax%lu", val);
} else if (val <= 255) {
- ldyconst (val);
+ AddCodeLine ("ldy #$%02X", (unsigned char) val);
AddCodeLine ("jsr incaxy");
} else {
g_add (flags | CF_CONST, val);
case CF_LONG:
if (val <= 255) {
- ldyconst (val);
+ AddCodeLine ("ldy #$%02X", (unsigned char) val);
AddCodeLine ("jsr inceaxy");
} else {
g_add (flags | CF_CONST, val);
if (val <= 8) {
AddCodeLine ("jsr decax%d", (int) val);
} else if (val <= 255) {
- ldyconst (val);
+ AddCodeLine ("ldy #$%02X", (unsigned char) val);
AddCodeLine ("jsr decaxy");
} else {
g_sub (flags | CF_CONST, val);
case CF_LONG:
if (val <= 255) {
- ldyconst (val);
+ AddCodeLine ("ldy #$%02X", (unsigned char) val);
AddCodeLine ("jsr deceaxy");
} else {
g_sub (flags | CF_CONST, val);
} while (Chunk);
/* Output the line */
- AddDataLine (Buf);
+ AddDataLine ("%s", Buf);
}
}
{
/* Register variables do always have less than 128 bytes */
unsigned CodeLabel = GetLocalLabel ();
- ldxconst (Size-1);
+ AddCodeLine ("ldx #$%02X", (unsigned char) (Size - 1));
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,x", GetLabelName (CF_STATIC, Label, 0));
AddCodeLine ("sta %s,x", GetLabelName (CF_REGVAR, Reg, 0));
CheckLocalOffs (Size);
if (Size <= 128) {
- ldyconst (Size-1);
+ AddCodeLine ("ldy #$%02X", Size-1);
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, Label, 0));
AddCodeLine ("sta (sp),y");
AddCodeLine ("dey");
AddCodeLine ("bpl %s", LocalLabelName (CodeLabel));
} else if (Size <= 256) {
- ldyconst (0);
+ AddCodeLine ("ldy #$00");
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, Label, 0));
AddCodeLine ("sta (sp),y");
{
if (Size <= 128) {
unsigned CodeLabel = GetLocalLabel ();
- ldyconst (Size-1);
+ AddCodeLine ("ldy #$%02X", Size-1);
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, InitLabel, 0));
AddCodeLine ("sta %s,y", GetLabelName (CF_STATIC, VarLabel, 0));
AddCodeLine ("bpl %s", LocalLabelName (CodeLabel));
} else if (Size <= 256) {
unsigned CodeLabel = GetLocalLabel ();
- ldyconst (0);
+ AddCodeLine ("ldy #$00");
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, InitLabel, 0));
AddCodeLine ("sta %s,y", GetLabelName (CF_STATIC, VarLabel, 0));
void g_asmcode (struct StrBuf* B)
/* Output one line of assembler code. */
{
- AddCodeLine ("%.*s", SB_GetLen (B), SB_GetConstBuf (B));
+ AddCodeLine ("%.*s", (int) SB_GetLen (B), SB_GetConstBuf (B));
}
projects / cc65 / blobdiff