/*
* Simulator of microcontrollers (inst.cc)
*
- * Copyright (C) 1999,99 Drotos Daniel, Talker Bt.
+ * Copyright (C) 1999,2002 Drotos Daniel, Talker Bt.
*
- * Written by Karl Bongers karl@turbobit.com
- *
* To contact author send email to drdani@mazsola.iit.uni-miskolc.hu
+ * Other contributors include:
+ * Karl Bongers karl@turbobit.com,
+ * Johan Knol
*
*/
#include "xacl.h"
#include "regsxa.h"
-int
-cl_xa::get_reg(int word_flag, unsigned int index)
+int cl_xa::get_reg(int word_flag, unsigned int index)
{
- //if (index < 3) { /* banked */
- // if (word_flag)
- // return get_word_direct(0x400+index);
- // else
- // return mem_direct[0x400+index];
- //} else { /* non-banked */
- if (word_flag)
- return get_word_direct(0x400+index);
- else
- return mem_direct[0x400+index];
- //}
+ int result;
+
+ if (word_flag) {
+ result = get_word_direct(index);
+ }
+ else {
+ result = get_byte_direct(index);
+ }
+ return result;
}
-int
-cl_xa::inst_NOP(uint code, int operands)
-{
- return(resGO);
+bool cl_xa::get_bit(int bit) {
+ short offset=0;
+ unsigned char result;
+
+ if (bit>=0x200) {
+ // in sfr space
+ bit-=0x200;
+ offset=0x400;
+ }
+ result = get_byte_direct(offset + (bit/8)) & (1 << (bit%8));
+ return result;
+ //return mem_direct[offset + (bit/8)] & (1 << (bit%8));
+}
+
+void cl_xa::set_bit(int bit, int value) {
+ short offset=0;
+ if (bit>=0x200) {
+ // in sfr space
+ bit-=0x200;
+ offset=0x400;
+ }
+#if 0
+ i = get_byte_direct(offset + (bit/8));
+ if (value) {
+ set_byte_direct(offset + (bit/8), i | (1 << (bit%8) );
+ //mem_direct[offset + (bit/8)] |= (1 << (bit%8));
+ } else {
+ set_byte_direct( offset + (bit/8), i & ~(1 << (bit%8) );
+ //mem_direct[offset + (bit/8)] &= ~(1 << (bit%8));
+ }
+#endif
}
#define RI_F0 ((code >> 4) & 0xf)
#define RI_0F (code & 0xf)
#define RI_07 (code & 0x7)
-int
-cl_xa::inst_ADD(uint code, int operands)
+int cl_xa::inst_ADD(uint code, int operands)
{
#undef FUNC1
#define FUNC1 add1
return(resGO);
}
-int
-cl_xa::inst_ADDC(uint code, int operands)
+int cl_xa::inst_ADDC(uint code, int operands)
{
#undef FUNC1
#define FUNC1 addc1
return(resGO);
}
-int
-cl_xa::inst_SUB(uint code, int operands)
+int cl_xa::inst_ADDS(uint code, int operands)
{
-#undef FUNC1
-#define FUNC1 sub1
-#undef FUNC2
-#define FUNC2 sub2
-#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_SUBB(uint code, int operands)
+int cl_xa::inst_AND(uint code, int operands)
{
#undef FUNC1
-#define FUNC1 subb1
+#define FUNC1 and1
#undef FUNC2
-#define FUNC2 subb2
+#define FUNC2 and2
#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_CMP(uint code, int operands)
+int cl_xa::inst_ANL(uint code, int operands)
{
-#undef FUNC1
-#define FUNC1 cmp1
-#undef FUNC2
-#define FUNC2 cmp2
-#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_AND(uint code, int operands)
+
+int cl_xa::inst_ASL(uint code, int operands)
{
-#undef FUNC1
-#define FUNC1 and1
-#undef FUNC2
-#define FUNC2 and2
-#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_OR(uint code, int operands)
+
+int cl_xa::inst_ASR(uint code, int operands)
{
-#undef FUNC1
-#define FUNC1 or1
-#undef FUNC2
-#define FUNC2 or2
-#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_XOR(uint code, int operands)
+
+int cl_xa::inst_BCC(uint code, int operands)
+{
+ return(resGO);
+}
+
+int cl_xa::inst_BCS(uint code, int operands)
+{
+ return(resGO);
+}
+
+int cl_xa::inst_BEQ(uint code, int operands)
+{
+ short jmpAddr = fetch1()*2;
+ if (get_psw() & BIT_Z) {
+ PC=(PC+jmpAddr)&0xfffffffe;
+ }
+ return(resGO);
+}
+
+int cl_xa::inst_BG(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BGE(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BGT(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BKPT(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BL(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BLE(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BLT(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BMI(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BNE(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BNV(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_BOV(uint code, int operands)
{
-#undef FUNC1
-#define FUNC1 xor1
-#undef FUNC2
-#define FUNC2 xor2
-#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_ADDS(uint code, int operands)
+int cl_xa::inst_BPL(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_NEG(uint code, int operands)
+
+int cl_xa::inst_BR(uint code, int operands)
{
+ short jmpAddr = fetch1()*2;
+ PC=(PC+jmpAddr)&0xfffffffe;
return(resGO);
}
-int
-cl_xa::inst_SEXT(uint code, int operands)
+
+int cl_xa::inst_CALL(uint code, int operands)
{
+ int jmpaddr;
+ unsigned int sp;
+ bool pageZero=get_scr()&1;
+
+ switch(operands) {
+ case REL16:
+ {
+ jmpaddr = (signed short)fetch2();
+ sp = get_sp() - (pageZero ? 2 : 4);
+ set_sp(sp);
+ store2(sp, PC&0xffff);
+ if (!pageZero) {
+ store2(sp+2, (PC>>16)&0xff);
+ }
+ jmpaddr *= 2;
+ PC = (PC + jmpaddr) & 0xfffffe;
+ }
+ break;
+ case IREG:
+ {
+ sp = get_sp() - (pageZero ? 2 : 4);
+ set_sp(sp);
+ store2(sp, PC&0xffff);
+ if (!pageZero) {
+ store2(sp+2, (PC>>16)&0xff);
+ }
+ jmpaddr = reg2(RI_07);
+ jmpaddr *= 2;
+ PC = (PC + jmpaddr) & 0xfffffe;
+ }
+ break;
+ }
return(resGO);
}
-int
-cl_xa::inst_MUL(uint code, int operands)
+
+int cl_xa::inst_CJNE(uint code, int operands)
{
+ switch(operands) {
+ case REG_DIRECT_REL8:
+ {
+ // update C,N,Z
+ if (code & 0x800) { // word op
+ int result;
+ int src = get_word_direct( ((code & 0x7)<<4) | fetch1());
+ int addr = (fetch1() * 2);
+ int dst = reg2(RI_F0);
+ unsigned char flags;
+ flags = get_psw();
+ flags &= ~BIT_ALL; /* clear these bits */
+ result = dst - src;
+ if (result == 0) flags |= BIT_Z;
+ if (result > 0xffff) flags |= BIT_C;
+ if (dst < src) flags |= BIT_N;
+ set_psw(flags);
+ if (flags & BIT_Z)
+ PC += addr;
+ } else {
+ int result;
+ int src = get_byte_direct( ((code & 0x7)<<4) | fetch1());
+ int addr = (fetch1() * 2);
+ int dst = reg1(RI_F0);
+ unsigned char flags;
+ flags = get_psw();
+ flags &= ~BIT_ALL; /* clear these bits */
+ result = dst - src;
+ if (result == 0) flags |= BIT_Z;
+ if (result > 0xff) flags |= BIT_C;
+ if (dst < src) flags |= BIT_N;
+ set_psw(flags);
+ if (flags & BIT_Z)
+ PC += addr;
+ }
+ }
+ break;
+
+ case DIRECT_REL8:
+ {
+ int daddr = ((code & 0x7) << 8) | fetch();
+ int addr = fetch() * 2;
+
+ if (code & 0x800) { // word op
+ unsigned short tmp = get_word_direct(daddr)-1;
+ set_word_direct(daddr, tmp);
+ if (tmp != 0)
+ PC += addr;
+ } else {
+ unsigned char tmp = get_word_direct(daddr)-1;
+ set_byte_direct(daddr, tmp);
+ if (tmp != 0)
+ PC += addr;
+ }
+ }
+ break;
+ }
return(resGO);
}
-int
-cl_xa::inst_DIV(uint code, int operands)
+
+int cl_xa::inst_CLR(uint code, int operands)
{
+ unsigned short bitAddr = (code&0x03 << 8) + fetch();
+ // fixme: implement
+ bitAddr=bitAddr;
return(resGO);
}
-int
-cl_xa::inst_DA(uint code, int operands)
+
+int cl_xa::inst_CMP(uint code, int operands)
{
+#undef FUNC1
+#define FUNC1 cmp1
+#undef FUNC2
+#define FUNC2 cmp2
+#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_ASL(uint code, int operands)
+int cl_xa::inst_CPL(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_ASR(uint code, int operands)
+int cl_xa::inst_DA(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_LEA(uint code, int operands)
+int cl_xa::inst_DIV(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_CPL(uint code, int operands)
+
+int cl_xa::inst_DJNZ(uint code, int operands)
{
+ // update N Z flags.
+ switch(operands) {
+ case REG_REL8:
+ {
+ int addr = ( ((char)fetch1()) * 2);
+ if (code & 0x800) { // word op
+ unsigned short tmp = mov2(0, reg2(RI_F0)-1);
+ set_reg2(RI_F0, tmp);
+ if (tmp != 0)
+ PC = (PC + addr) & 0xfffffffe;
+ } else {
+ unsigned char tmp = mov1(0, reg1(RI_F0)-1);
+ set_reg1(RI_F0, tmp);
+ if (tmp != 0)
+ PC = (PC + addr) & 0xfffffffe;
+ }
+ }
+ break;
+
+ case DIRECT_REL8:
+ {
+ int daddr = ((code & 0x7) << 8) | fetch();
+ int addr = fetch() * 2;
+
+ if (code & 0x800) { // word op
+ unsigned short tmp = get_word_direct(daddr)-1;
+ set_word_direct(daddr, tmp);
+ if (tmp != 0)
+ PC += addr;
+ } else {
+ unsigned char tmp = get_word_direct(daddr)-1;
+ set_byte_direct(daddr, tmp);
+ if (tmp != 0)
+ PC += addr;
+ }
+ }
+ break;
+ }
+
return(resGO);
}
-int
-cl_xa::inst_LSR(uint code, int operands)
+
+int cl_xa::inst_FCALL(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_NORM(uint code, int operands)
+
+int cl_xa::inst_FJMP(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_RL(uint code, int operands)
+
+int cl_xa::inst_JB(uint code, int operands)
{
+ short bitAddr=((code&0x3)<<8) + fetch1();
+ short jmpAddr = (fetch1() * 2);
+ if (get_bit(bitAddr)) {
+ PC = (PC+jmpAddr)&0xfffffe;
+ }
return(resGO);
}
-int
-cl_xa::inst_RLC(uint code, int operands)
+int cl_xa::inst_JBC(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_RR(uint code, int operands)
+int cl_xa::inst_JNB(uint code, int operands)
{
+ short bitAddr=((code&0x3)<<8) + fetch1();
+ short jmpAddr = (fetch1() * 2);
+ if (!get_bit(bitAddr)) {
+ PC = (PC+jmpAddr)&0xfffffe;
+ }
+ return(resGO);
return(resGO);
}
-int
-cl_xa::inst_RRC(uint code, int operands)
+int cl_xa::inst_JMP(uint code, int operands)
{
+ int jmpAddr;
+
+ switch(operands) {
+ case REL16:
+ {
+ jmpAddr = (signed short)fetch2()*2;
+ PC = (PC + jmpAddr) & 0xfffffffe;
+ }
+ break;
+ case IREG:
+ PC &= 0xff0000;
+ PC |= (reg2(RI_07) & 0xfffe); /* word aligned */
+ break;
+ /* fixme 2 more... */
+ }
return(resGO);
}
-int
-cl_xa::inst_MOVS(uint code, int operands)
+int cl_xa::inst_JNZ(uint code, int operands)
{
+ short saddr = (fetch1() * 2);
+ /* reg1(8) = R4L, is ACC for MCS51 compatiblility */
+ if (reg1(8)!=0) {
+ PC = (PC + saddr) & 0xfffffe;
+ }
return(resGO);
}
-int
-cl_xa::inst_MOVC(uint code, int operands)
+int cl_xa::inst_JZ(uint code, int operands)
+{
+ /* reg1(8) = R4L, is ACC for MCS51 compatiblility */
+ short saddr = (fetch1() * 2);
+ if (reg1(8)==0) {
+ PC += saddr;
+ }
+ return(resGO);
+}
+int cl_xa::inst_LEA(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_LSR(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_MOV(uint code, int operands)
+{
+#undef FUNC1
+#define FUNC1 mov1
+#undef FUNC2
+#define FUNC2 mov2
+#include "inst_gen.cc"
+ return(resGO);
+}
+int cl_xa::inst_MOVC(uint code, int operands)
{
switch (operands) {
case REG_IREGINC:
}
}
break;
- // fixme, 2 more
+ case A_APLUSDPTR:
+ { /* R4l=ACC, R6=DPTR */
+ unsigned int addr = (PC & 0xff0000) | (reg1(4) + reg2(6));
+ unsigned short result;
+ unsigned char flags;
+ flags = get_psw();
+
+ flags &= ~(BIT_Z | BIT_N); /* clear these bits */
+ result = getcode1(addr);
+ set_reg1( 4, result);
+ if (result == 0) flags |= BIT_Z;
+ if (result & 0x80) flags |= BIT_N;
+ set_psw(flags);
+ }
+ break;
+ case A_APLUSPC:
+ { /* R4l=ACC, R6=DPTR */
+ unsigned int addr = (PC + reg1(4));
+ unsigned short result;
+ unsigned char flags;
+ flags = get_psw();
+
+ flags &= ~(BIT_Z | BIT_N); /* clear these bits */
+ result = getcode1(addr);
+ set_reg1( 4, result);
+ if (result == 0) flags |= BIT_Z;
+ if (result & 0x80) flags |= BIT_N;
+ set_psw(flags);
+ }
+ break;
}
return(resGO);
}
-int
-cl_xa::inst_MOVX(uint code, int operands)
+int cl_xa::inst_MOVS(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_MOVX(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_MUL(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_NEG(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_NOP(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_NORM(uint code, int operands)
+{
+ return(resGO);
+}
+int cl_xa::inst_OR(uint code, int operands)
+{
+#undef FUNC1
+#define FUNC1 or1
+#undef FUNC2
+#define FUNC2 or2
+#include "inst_gen.cc"
+ return(resGO);
+}
+
+int cl_xa::inst_ORL(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_PUSH(uint code, int operands)
+
+int cl_xa::inst_POP(uint code, int operands)
{
switch(operands) {
- case DIRECT_ALONE:
+ case DIRECT:
{
unsigned short sp;
unsigned short direct_addr = ((operands & 0x7) << 8) | fetch();
- sp = get_sp()-2;
- set_sp(sp);
+ sp = get_sp();
if (code & 0x0800) { /* word op */
- store2( sp, get_word_direct(direct_addr));
+ set_word_direct(direct_addr, get2(sp) );
} else {
- store2( sp, get_byte_direct(direct_addr));
+ set_byte_direct(direct_addr, get2(sp) & 0xff );
}
+ set_sp(sp+2);
}
break;
rlist = rlist; //shutup compiler
break;
}
-
return(resGO);
}
-int
-cl_xa::inst_POP(uint code, int operands)
+
+int cl_xa::inst_PUSH(uint code, int operands)
{
switch(operands) {
- case DIRECT_ALONE:
+ case DIRECT:
{
unsigned short sp;
unsigned short direct_addr = ((operands & 0x7) << 8) | fetch();
- sp = get_sp();
+ sp = get_sp()-2;
+ set_sp(sp);
if (code & 0x0800) { /* word op */
- set_word_direct(direct_addr, get2(sp) );
+ store2( sp, get_word_direct(direct_addr));
} else {
- set_byte_direct(direct_addr, get2(sp) & 0xff );
+ store2( sp, get_byte_direct(direct_addr));
}
- set_sp(sp+2);
}
break;
rlist = rlist; //shutup compiler
break;
}
+
return(resGO);
}
-int
-cl_xa::inst_XCH(uint code, int operands)
-{
- return(resGO);
-}
-int
-cl_xa::inst_SETB(uint code, int operands)
-{
- return(resGO);
-}
-int
-cl_xa::inst_CLR(uint code, int operands)
-{
- return(resGO);
-}
-int
-cl_xa::inst_MOV(uint code, int operands)
-{
-#undef FUNC1
-#define FUNC1 mov1
-#undef FUNC2
-#define FUNC2 mov2
-#include "inst_gen.cc"
- return(resGO);
-}
-int
-cl_xa::inst_ANL(uint code, int operands)
-{
- return(resGO);
-}
-int
-cl_xa::inst_ORL(uint code, int operands)
-{
- return(resGO);
-}
-int
-cl_xa::inst_BR(uint code, int operands)
+int cl_xa::inst_RESET(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_JMP(uint code, int operands)
+int cl_xa::inst_RET(uint code, int operands)
{
- unsigned int jmpaddr;
- short saddr;
+ unsigned int retaddr;
+ unsigned short sp;
+ bool pageZero=get_scr()&1;
- switch(operands) {
- case REL16:
- {
- saddr = fetch2();
- jmpaddr = saddr;
- jmpaddr *= 2;
- PC = (PC + jmpaddr) & 0xfffffffe;
- }
- break;
- case IREG:
- PC &= 0xffff0000;
- PC |= (reg2(RI_07) & 0xfffe); /* word aligned */
- break;
- /* fixme 2 more... */
+ sp = get_sp();
+ retaddr = get2(sp);
+ if (!pageZero) {
+ retaddr |= get2(sp+2) << 16;
+ set_sp(sp+4);
+ } else {
+ set_sp(sp+2);
}
+ PC = retaddr;
return(resGO);
}
-int
-cl_xa::inst_CALL(uint code, int operands)
+int cl_xa::inst_RETI(uint code, int operands)
{
- unsigned int jmpaddr;
- unsigned int sp;
+ unsigned int retaddr;
+ unsigned short sp;
+ bool pageZero=get_scr()&1;
- switch(operands) {
- case REL16:
- {
- jmpaddr = fetch2();
- sp = get_sp() - 4;
- set_sp(sp);
- store2(sp, PC);
- store2(sp+2, 0); /* segment(not sure about ordering...) */
- jmpaddr *= 2;
- PC = (PC + jmpaddr) & 0xfffffffe;
- }
- break;
- case IREG:
- {
- sp = get_sp() - 4;
- set_sp(sp);
- store2(sp, PC);
- store2(sp+2, 0); /* segment(not sure about ordering...) */
- jmpaddr = reg2(RI_07);
- jmpaddr *= 2;
- PC = (PC + jmpaddr) & 0xfffffffe;
- }
- break;
- /* fixme 2 more... */
+ sp = get_sp();
+ set_psw(get2(sp));
+ retaddr = get2(sp+2);
+ if (!pageZero) {
+ retaddr |= get2(sp+4) << 16;
+ set_sp(sp+6);
+ } else {
+ set_sp(sp+4);
}
+ PC = retaddr;
return(resGO);
}
-int
-cl_xa::inst_RET(uint code, int operands)
+int cl_xa::inst_RL(uint code, int operands)
{
- unsigned int retaddr;
- unsigned short sp;
- sp = get_sp();
- retaddr = get2(sp);
- //retaddr |= get2(sp+2) << 16);
- PC = retaddr;
return(resGO);
}
-int
-cl_xa::inst_Bcc(uint code, int operands)
+int cl_xa::inst_RLC(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_JB(uint code, int operands)
+int cl_xa::inst_RR(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_JNB(uint code, int operands)
+int cl_xa::inst_RRC(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_CJNE(uint code, int operands)
+int cl_xa::inst_SETB(uint code, int operands)
{
+ unsigned short bitAddr = (code&0x03 << 8) + fetch();
+ // fixme: implement
+ bitAddr=bitAddr;
return(resGO);
}
-int
-cl_xa::inst_DJNZ(uint code, int operands)
+
+int cl_xa::inst_SEXT(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_JZ(uint code, int operands)
+
+int cl_xa::inst_SUB(uint code, int operands)
{
- short saddr = (fetch1() * 2);
- if (get_psw() & BIT_Z) {
- PC += saddr;
- }
+#undef FUNC1
+#define FUNC1 sub1
+#undef FUNC2
+#define FUNC2 sub2
+#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_JNZ(uint code, int operands)
+
+int cl_xa::inst_SUBB(uint code, int operands)
{
- short saddr = (fetch1() * 2);
- if (!(get_psw() & BIT_Z)) {
- PC += saddr;
- }
+#undef FUNC1
+#define FUNC1 subb1
+#undef FUNC2
+#define FUNC2 subb2
+#include "inst_gen.cc"
return(resGO);
}
-int
-cl_xa::inst_BKPT(uint code, int operands)
+int cl_xa::inst_TRAP(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_TRAP(uint code, int operands)
+int cl_xa::inst_XCH(uint code, int operands)
{
return(resGO);
}
-int
-cl_xa::inst_RESET(uint code, int operands)
+int cl_xa::inst_XOR(uint code, int operands)
{
+#undef FUNC1
+#define FUNC1 xor1
+#undef FUNC2
+#define FUNC2 xor2
+#include "inst_gen.cc"
return(resGO);
}
-
/* End of xa.src/inst.cc */
projects / fw / sdcc / blobdiff