darkkirb/old-cross-binutils
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

* simops.c: Fix minor typos. Handle "cmp", "setf", "tst"

Browse source 
"di", and "ei" instructions correctly.
This commit is contained in:
Jeff Law 1996-08-30 04:11:32 +00:00
parent 2108e86459
commit 3095b8dfc5
2 changed files with 146 additions and 25 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
sim/v850/ChangeLog
View file

@ -1,5 +1,8 @@
Thu Aug 29 13:53:29 1996 Jeffrey A Law (law@cygnus.com)
* simops.c: Fix minor typos. Handle "cmp", "setf", "tst"
"di", and "ei" instructions correctly.
* interp.c (do_format_3): Get operands correctly and call
the target function.
* simops.c: Handle bCC instructions.

168
sim/v850/simops.c
View file

@ -401,7 +401,6 @@ OP_1A0 ()
State.psw &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
State.psw |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
State.regs[OP[1]] = State.regs[OP[0]];
}
/* subr reg1, reg2 */
@ -498,6 +497,145 @@ OP_40 ()
| (ov ? PSW_OV : 0));
}
/* cmp reg, reg */
void
OP_1E0 ()
{
unsigned int op0, op1, result, z, s, cy, ov;
/* Compute the result. */
op0 = State.regs[OP[0]];
op1 = State.regs[OP[1]];
result = op1 - op0;
/* Compute the condition codes. */
z = (result == 0);
s = (result & 0x80000000);
cy = (result < -op0);
ov = ((op1 & 0x80000000) != (op0 & 0x80000000)
&& (op1 & 0x80000000) != (result & 0x80000000));
/* Set condition codes. */
State.psw &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
State.psw |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
}
/* cmp sign_extend(imm5), reg */
void
OP_260 ()
{
unsigned int op0, op1, result, z, s, cy, ov;
int temp;
/* Compute the result. */
temp = OP[0];
temp = (temp << 27) >> 27;
op0 = temp;
op1 = State.regs[OP[1]];
result = op1 - op0;
/* Compute the condition codes. */
z = (result == 0);
s = (result & 0x80000000);
cy = (result < -op0);
ov = ((op1 & 0x80000000) != (op0 & 0x80000000)
&& (op1 & 0x80000000) != (result & 0x80000000));
/* Set condition codes. */
State.psw &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
State.psw |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
}
/* setf cccc,reg2 */
void
OP_7E0 ()
{
/* Hack alert. We turn off a bit in op0 since we really only
wanted 4 bits. */
unsigned int op0, psw, result;
op0 = OP[0] & 0xf;
psw = State.psw;
switch (op0)
{
case 0x0:
result = ((psw & PSW_OV) != 0);
break;
case 0x1:
result = ((psw & PSW_CY) != 0);
break;
case 0x2:
result = ((psw & PSW_Z) != 0);
break;
case 0x3:
result = ((((psw & PSW_CY) != 0) | ((psw & PSW_Z) != 0)) != 0);
break;
case 0x4:
result = ((psw & PSW_S) != 0);
break;
case 0x5:
result = 1;
break;
case 0x6:
result = ((((psw & PSW_S) != 0) ^ ((psw & PSW_OV) != 0)) != 0);
break;
case 0x7:
result = (((((psw & PSW_S) != 0) ^ ((psw & PSW_OV) != 0))
|| ((psw & PSW_Z) != 0)) != 0);
break;
case 0x8:
result = ((psw & PSW_OV) == 0);
break;
case 0x9:
result = ((psw & PSW_CY) == 0);
break;
case 0xa:
result = ((psw & PSW_Z) == 0);
break;
case 0xb:
result = ((((psw & PSW_CY) != 0) | ((psw & PSW_Z) != 0)) == 0);
break;
case 0xc:
result = ((psw & PSW_S) == 0);
break;
case 0xd:
result = ((psw & PSW_SAT) != 0);
break;
case 0xe:
result = ((((psw & PSW_S) != 0) ^ ((psw & PSW_OV) != 0)) == 0);
break;
case 0xf:
result = (((((psw & PSW_S) != 0) ^ ((psw & PSW_OV) != 0))
|| ((psw & PSW_Z) != 0)) == 0);
break;
}
State.regs[OP[1]] = result;
}
/* tst reg,reg */
void
OP_160 ()
{
unsigned int op0, op1, result, z, s, cy, ov;
/* Compute the result. */
op0 = State.regs[OP[0]];
op1 = State.regs[OP[1]];
result = op0 & op1;
/* Compute the condition codes. */
z = (result == 0);
s = (result & 0x80000000);
/* Store the condition codes. */
State.psw &= ~(PSW_Z | PSW_S | PSW_OV);
State.psw |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0));
}
void
OP_10720 ()
{
@ -578,21 +716,11 @@ OP_1687E0 ()
{
}
void
OP_1E0 ()
{
}
void
OP_A0 ()
{
}
void
OP_260 ()
{
}
void
OP_740 ()
{
@ -745,11 +873,6 @@ OP_47C0 ()
{
}
void
OP_7E0 ()
{
}
/* or reg, reg */
void
OP_100 ()
@ -912,18 +1035,18 @@ OP_501 ()
{
}
/* di, not supported */
/* di */
void
OP_16007E0 ()
{
abort ();
State.psw |= PSW_ID;
}
/* ei, not supported */
/* ei */
void
OP_16087E0 ()
{
abort ();
State.psw &= ~PSW_ID;
}
/* halt, not supported */
@ -966,11 +1089,6 @@ OP_400 ()
{
}
void
OP_160 ()
{
}
void
OP_700 ()
{