exit(0);
}
-bool isRegString(char *s)
+bool isRegString(const char *s)
{
if (!strcmp(s, "b") ||
!strcmp(s, "c") ||
return (*s == '#' || *s == '$');
}
-bool canAssignToPtr(char *s)
+bool canAssignToPtr(const char *s)
{
if (isRegString(s))
return TRUE;
/*-----------------------------------------------------------------*/
/* aopPut - puts a string for a aop */
/*-----------------------------------------------------------------*/
-static void aopPut (asmop *aop, char *s, int offset)
+static void aopPut (asmop *aop, const char *s, int offset)
{
if (aop->size && offset > ( aop->size - 1)) {
werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
emit2("ld !*hl,a");
}
else
- emit2("ld !*hl,%s ; 3", s);
+ emit2("ld !*hl,%s", s);
}
else {
if (!canAssignToPtr(s)) {
#define AOP_SIZE(op) AOP(op)->size
#define AOP_NEEDSACC(x) (AOP(x) && (AOP_TYPE(x) == AOP_CRY))
+static void commitPair(asmop *aop, PAIR_ID id)
+{
+ if (id == PAIR_HL && requiresHL(aop)) {
+ emit2("ld a,l");
+ emit2("ld d,h");
+ aopPut(aop, "a", 0);
+ aopPut(aop, "d", 1);
+ }
+ else {
+ aopPut(aop, _pairs[id].l, 0);
+ aopPut(aop, _pairs[id].h, 1);
+ }
+}
+
/*-----------------------------------------------------------------*/
/* getDataSize - get the operand data size */
/*-----------------------------------------------------------------*/
if (genPlusIncr (ic) == TRUE)
goto release;
+ emit2("; genPlusIncr failed");
+
size = getDataSize(IC_RESULT(ic));
/* Special case when left and right are constant */
goto release;
}
+ /* Special case:
+ ld hl,sp+n trashes C so we cant afford to do it during an
+ add with stack based varibles. Worst case is:
+ ld hl,sp+left
+ ld a,(hl)
+ ld hl,sp+right
+ add (hl)
+ ld hl,sp+result
+ ld (hl),a
+ ld hl,sp+left+1
+ ld a,(hl)
+ ld hl,sp+right+1
+ adc (hl)
+ ld hl,sp+result+1
+ ld (hl),a
+ So you cant afford to load up hl if either left, right, or result
+ is on the stack (*sigh*) The alt is:
+ ld hl,sp+left
+ ld de,(hl)
+ ld hl,sp+right
+ ld hl,(hl)
+ add hl,de
+ ld hl,sp+result
+ ld (hl),hl
+ Combinations in here are:
+ * If left or right are in bc then the loss is small - trap later
+ * If the result is in bc then the loss is also small
+ */
+ if (IS_GB) {
+ if (AOP_TYPE(IC_LEFT(ic)) == AOP_STK ||
+ AOP_TYPE(IC_RIGHT(ic)) == AOP_STK ||
+ AOP_TYPE(IC_RESULT(ic)) == AOP_STK) {
+ if (size == 2) {
+ if (getPairId(AOP(IC_RIGHT(ic))) == PAIR_BC) {
+ /* Swap left and right */
+ operand *t = IC_RIGHT(ic);
+ IC_RIGHT(ic) = IC_LEFT(ic);
+ IC_LEFT(ic) = t;
+ }
+ if (getPairId(AOP(IC_LEFT(ic))) == PAIR_BC) {
+ fetchPair(PAIR_HL, AOP(IC_RIGHT(ic)));
+ emit2("add hl,bc");
+ }
+ else {
+ fetchPair(PAIR_DE, AOP(IC_LEFT(ic)));
+ fetchPair(PAIR_HL, AOP(IC_RIGHT(ic)));
+ emit2("add hl,de");
+ }
+ commitPair(AOP(IC_RESULT(ic)), PAIR_HL);
+ goto release;
+ }
+ else if (size == 4) {
+ emit2("; WARNING: This add is probably broken.\n");
+ }
+ }
+ }
+
while(size--) {
if (AOP_TYPE(IC_LEFT(ic)) == AOP_ACC) {
MOVA(aopGet(AOP(IC_LEFT(ic)),offset,FALSE));
if(offset == 0)
- emitcode("add","a,%s",
- aopGet(AOP(IC_RIGHT(ic)),offset,FALSE));
+ emit2("add a,%s",
+ aopGet(AOP(IC_RIGHT(ic)),offset,FALSE));
else
- emitcode("adc","a,%s",
- aopGet(AOP(IC_RIGHT(ic)),offset,FALSE));
+ emit2("adc a,%s",
+ aopGet(AOP(IC_RIGHT(ic)),offset,FALSE));
} else {
MOVA(aopGet(AOP(IC_LEFT(ic)),offset,FALSE));
if(offset == 0)
- emitcode("add","a,%s",
- aopGet(AOP(IC_RIGHT(ic)),offset,FALSE));
+ emit2("add a,%s",
+ aopGet(AOP(IC_RIGHT(ic)),offset,FALSE));
else
- emitcode("adc","a,%s",
- aopGet(AOP(IC_RIGHT(ic)),offset,FALSE));
+ emit2("adc a,%s",
+ aopGet(AOP(IC_RIGHT(ic)),offset,FALSE));
}
- aopPut(AOP(IC_RESULT(ic)),"a",offset++);
+ aopPut(AOP(IC_RESULT(ic)),"a",offset++);
}
-
- /* Some kind of pointer arith. */
- if (AOP_SIZE(IC_RESULT(ic)) == 3 &&
- AOP_SIZE(IC_LEFT(ic)) == 3 &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_LEFT(ic))))
- wassert(0);
-
- if (AOP_SIZE(IC_RESULT(ic)) == 3 &&
- AOP_SIZE(IC_RIGHT(ic)) == 3 &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_RIGHT(ic))))
- wassert(0);
-
release:
freeAsmop(IC_LEFT(ic),NULL,ic);
lit = - (long)lit;
}
-
+ /* Same logic as genPlus */
+ if (IS_GB) {
+ if (AOP_TYPE(IC_LEFT(ic)) == AOP_STK ||
+ AOP_TYPE(IC_RIGHT(ic)) == AOP_STK ||
+ AOP_TYPE(IC_RESULT(ic)) == AOP_STK) {
+ if (size == 2) {
+ PAIR_ID left = getPairId(AOP(IC_LEFT(ic)));
+ PAIR_ID right = getPairId(AOP(IC_RIGHT(ic)));
+
+ if (left == PAIR_INVALID && right == PAIR_INVALID) {
+ left = PAIR_DE;
+ right = PAIR_HL;
+ }
+ else if (right == PAIR_INVALID)
+ right = PAIR_DE;
+ else if (left == PAIR_INVALID)
+ left = PAIR_DE;
+
+ fetchPair(left, AOP(IC_LEFT(ic)));
+ /* Order is important. Right may be HL */
+ fetchPair(right, AOP(IC_RIGHT(ic)));
+
+ emit2("ld a,%s", _pairs[left].l);
+ emit2("sub a,%s", _pairs[right].l);
+ emit2("ld e,a");
+ emit2("ld a,%s", _pairs[left].h);
+ emit2("sbc a,%s", _pairs[right].h);
+
+ aopPut(AOP(IC_RESULT(ic)), "a", 1);
+ aopPut(AOP(IC_RESULT(ic)), "e", 0);
+ goto release;
+ }
+ else if (size == 4) {
+ emit2("; WARNING: This sub is probably broken.\n");
+ }
+ }
+ }
+
/* if literal, add a,#-lit, else normal subb */
while (size--) {
MOVA(aopGet(AOP(IC_LEFT(ic)),offset,FALSE));
projects / fw / sdcc / blobdiff