}
#endif
+#if 0
/*-----------------------------------------------------------------*/
/* genAddlit - generates code for addition */
/*-----------------------------------------------------------------*/
}
}
+#endif
static void emitMOVWF(operand *reg, int offset)
{
static void genAddLit (iCode *ic, int lit)
{
- int size,same;
- int lo;
+ int size,sizeL,same;
+ int i, llit;
operand *result;
operand *left;
+ sym_link *lleft;
FENTRY;
left = IC_LEFT(ic);
+ lleft = operandType (left);
result = IC_RESULT(ic);
same = pic16_sameRegs(AOP(left), AOP(result));
size = pic16_getDataSize(result);
+ sizeL = pic16_getDataSize(left);
+ llit = lit;
+
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+ /* move left to result -- possibly sign extend */
+ for (i=0; i < MIN(size, sizeL); i++) {
+ pic16_mov2f (AOP(result), AOP(left), i);
+ } // for i
+#undef MIN
+
+ /* extend to result size */
+ if (IS_UNSIGNED(lleft)) {
+ /* zero-extend */
+ for (i = sizeL; i < size; i++) {
+ pic16_emitpcode (POC_CLRF, pic16_popGet (AOP(result), i));
+ } // for i
+ } else {
+ /* sign-extend */
+ if (size == sizeL + 1) {
+ pic16_emitpcode (POC_CLRF, pic16_popGet (AOP(result), sizeL));
+ pic16_emitpcode (POC_BTFSC, pic16_newpCodeOpBit_simple (AOP(left),sizeL-1,7));
+ pic16_emitpcode (POC_SETF, pic16_popGet (AOP(result), sizeL));
+ } else {
+ pic16_emitpcode (POC_CLRF, pic16_popCopyReg (&pic16_pc_wreg));
+ pic16_emitpcode (POC_BTFSC, pic16_newpCodeOpBit_simple (AOP(left),sizeL-1,7));
+ pic16_emitpcode (POC_SETF, pic16_popCopyReg (&pic16_pc_wreg));
+
+ for (i=sizeL; i < size; i++) {
+ pic16_emitpcode (POC_MOVWF, pic16_popGet (AOP(result), i));
+ } // for i
+ } // if
+ } // if (SIGNED)
+
+ /* special cases */
+ if (lit == 0) {
+ /* nothing to do */
+ } else if (lit == 1) {
+ switch (size) {
+ case 1:
+ /* handled below */
+ break;
+ case 2:
+ pic16_emitpcode (POC_INFSNZ, pic16_popGet (AOP(result), 0));
+ break;
+ default:
+ assert (size > 2);
+ pic16_emitpcode (POC_INCF, pic16_popGet(AOP(result), 0));
+ for (i=1; i < size-1; i++) {
+ emitSKPNC; /* a jump here saves up to 2(size-2)cycles */
+ pic16_emitpcode (POC_INCF, pic16_popGet(AOP(result), i));
+ } // for i
+ emitSKPNC;
+ break;
+ } // switch
+
+ pic16_emitpcode (POC_INCF, pic16_popGet (AOP(result), size-1));
+ } else {
+ /* general case */
+
+ /* add literal to result */
+ for (i=0; i < size; i++) {
+ pic16_emitpcode (POC_MOVLW, pic16_popGetLit (llit));
+ llit >>= 8; /* FIXME: arithmetic right shift for signed literals? */
+ pic16_emitpcode (i == 0 ? POC_ADDWF : POC_ADDWFC,
+ pic16_popGet (AOP(result), i));
+ }
+ }
+
+#if 0
if(same) {
}
}
}
+#endif
}
/*-----------------------------------------------------------------*/
for(i=size; i< AOP_SIZE(result); i++) {
pic16_emitpcode(POC_CLRF, pic16_popGet(AOP(result),i));
pic16_emitpcode(POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(right),size-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode(POC_COMF, pic16_popGet(AOP(result),i));
+ pic16_emitpcode(POC_SETF, pic16_popGet(AOP(result),i));
pic16_emitpcode(POC_MOVLW, pic16_popGet(AOP(left),i));
pic16_emitpcode(POC_ADDWFC, pic16_popGet(AOP(result),i));
}
// add leftover bytes
// either left or right is too short
for (i=size; i < AOP_SIZE(result); i++) {
- fprintf (stderr, "%s:%d: new code...\n", __FUNCTION__, __LINE__);
- pic16_emitcode ("; ", "new arithmetics... test me...");
// get right operand into WREG
if (i < AOP_SIZE(right)) {
pic16_mov2w (AOP(right), i);
} else {
- pic16_emitcode ("; =##", "right too short");
// right is too short
pic16_emitpcode (POC_CLRF, pic16_popCopyReg (&pic16_pc_wreg));
if (!SPEC_USIGN(getSpec(operandType(right)))) {
- pic16_emitcode ("; =##", "right signed");
// right operand is signed
pic16_emitpcode(POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(right),AOP_SIZE(right)-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode(POC_COMF, pic16_popCopyReg (&pic16_pc_wreg));
+ pic16_emitpcode(POC_SETF, pic16_popCopyReg (&pic16_pc_wreg));
}
}
pic16_emitpcode(POC_MOVWF, pic16_popGet(AOP(result),i));
}
} else {
- pic16_emitcode ("; =##", "left too short");
// left is too short
pic16_emitpcode (POC_CLRF, pic16_popGet (AOP(result), i));
if (!SPEC_USIGN(getSpec(operandType(left)))) {
- pic16_emitcode ("; =##", "left signed");
// left operand is signed
pic16_emitpcode(POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(left),AOP_SIZE(left)-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode(POC_COMF, pic16_popGet (AOP(result), i));
+ pic16_emitpcode(POC_SETF, pic16_popGet (AOP(result), i));
}
pic16_emitpcode (POC_ADDWFC, pic16_popGet (AOP(result), i));
}
} // for i
goto release;
-
-#if 0
- // add leftover bytes
- if (SPEC_USIGN(getSpec(operandType(right)))) {
- // right is unsigned
- for(i=size; i< AOP_SIZE(result); i++) {
- if (pic16_sameRegs(AOP(left), AOP(result)))
- {
- pic16_emitpcode(POC_CLRF, pic16_popCopyReg(&pic16_pc_wreg));
- pic16_emitpcode(POC_ADDWFC, pic16_popGet(AOP(left),i));
- } else { // not same
- pic16_emitpcode(POC_CLRF, pic16_popCopyReg(&pic16_pc_wreg));
- pic16_emitpcode(POC_ADDFWC, pic16_popGet(AOP(left),i));
- pic16_emitpcode(POC_MOVWF, pic16_popGet(AOP(result),i));
- }
- }
- } else {
- // right is signed
- for(i=size; i< AOP_SIZE(result); i++) {
- if(size < AOP_SIZE(left)) {
- pic16_emitpcode(POC_CLRF, pic16_popCopyReg(&pic16_pc_wreg));
- pic16_emitpcode(POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(right),size-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode(POC_COMFW, pic16_popCopyReg(&pic16_pc_wreg));
- if (pic16_sameRegs(AOP(left), AOP(result)))
- {
- pic16_emitpcode(POC_ADDWFC, pic16_popGet(AOP(left),i));
- } else { // not same
- pic16_emitpcode(POC_ADDFWC, pic16_popGet(AOP(left),i));
- pic16_emitpcode(POC_MOVWF, pic16_popGet(AOP(result),i));
- }
- } else {
- pic16_emitpcode(POC_CLRF, pic16_popCopyReg(&pic16_pc_wreg));
- pic16_emitpcode(POC_ADDWFC, pic16_popGet(AOP(result), i));
- }
- }
- }
- goto release;
-#endif
}
}
assert( 0 );
- // TODO: anything from here to before "release:" is probably obsolete and should be removed
- // when the regression tests are stable
-
- if (AOP_SIZE(result) > AOP_SIZE(right)) {
- int sign = !(SPEC_USIGN(getSpec(operandType(left))) |
- SPEC_USIGN(getSpec(operandType(right))) );
-
-
- /* Need to extend result to higher bytes */
- size = AOP_SIZE(result) - AOP_SIZE(right) - 1;
-
- /* First grab the carry from the lower bytes */
- pic16_emitpcode(POC_CLRF, pic16_popGet(AOP(result),offset));
- pic16_emitpcode(POC_RLCF, pic16_popGet(AOP(result),offset));
-
-
- if(sign) {
- /* Now this is really horrid. Gotta check the sign of the addends and propogate
- * to the result */
-
- pic16_emitpcode(POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(left),offset-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode(POC_DECF, pic16_popGet(AOP(result),offset));
- pic16_emitpcode(POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(right),offset-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode(POC_DECF, pic16_popGet(AOP(result),offset));
-
- /* if chars or ints or being signed extended to longs: */
- if(size) {
- pic16_emitpcode(POC_MOVLW, pic16_popGetLit(0));
- pic16_emitpcode(POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(result),offset,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode(POC_MOVLW, pic16_popGetLit(0xff));
- }
- }
-
- offset++;
- while(size--) {
-
- if(sign)
- pic16_emitpcode(POC_MOVWF, pic16_popGet(AOP(result),offset));
- else
- pic16_emitpcode(POC_CLRF, pic16_popGet(AOP(result),offset));
-
- offset++;
- }
- }
-
-
- //adjustArithmeticResult(ic);
-
- release:
+
+release:
pic16_freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
pic16_freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
pic16_freeAsmop(result,NULL,ic,TRUE);
if(size == 1) {
pic16_emitpcode(POC_CLRF,pic16_popGet(AOP(result),offset));
pic16_emitpcode(POC_BTFSC,pic16_newpCodeOpBit(pic16_aopGet(AOP(result),offset-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode(POC_DECF, pic16_popGet(AOP(result),offset));
+ pic16_emitpcode(POC_SETF, pic16_popGet(AOP(result),offset));
} else {
pic16_emitpcode(POC_MOVLW, pic16_popGetLit(0));
if (!SPEC_USIGN(operandType(IC_RIGHT(ic)))) {
// signed -- sign extend the right operand
pic16_emitpcode (POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(IC_RIGHT(ic)),AOP_SIZE(IC_RIGHT(ic))-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode (POC_COMF, pic16_popCopyReg (&pic16_pc_wreg));
+ pic16_emitpcode (POC_SETF, pic16_popCopyReg (&pic16_pc_wreg));
}
}
if (pic16_sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic)))) {
if (!SPEC_USIGN(operandType(IC_LEFT(ic)))) {
// signed -- sign extend the left operand
pic16_emitpcode (POC_BTFSC, pic16_newpCodeOpBit(pic16_aopGet(AOP(IC_LEFT(ic)),AOP_SIZE(IC_LEFT(ic))-1,FALSE,FALSE),7,0, PO_GPR_REGISTER));
- pic16_emitpcode (POC_COMF, pic16_popGet(AOP(IC_RESULT(ic)), offset)); // keep CARRY/#BORROW bit intact!
+ pic16_emitpcode (POC_SETF, pic16_popGet(AOP(IC_RESULT(ic)), offset)); // keep CARRY/#BORROW bit intact!
}
pic16_emitpcode(POC_SUBWFB_D1, pic16_popGet(AOP(IC_RESULT(ic)),offset));
}
projects / fw / sdcc / blobdiff