diff options
Diffstat (limited to 'sim/v850/simops.c')
| -rw-r--r-- | sim/v850/simops.c | 168 |
1 files changed, 143 insertions, 25 deletions
diff --git a/sim/v850/simops.c b/sim/v850/simops.c index 9eac939..31c56c4 100644 --- a/sim/v850/simops.c +++ b/sim/v850/simops.c @@ -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 () { @@ -579,21 +717,11 @@ 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 */ @@ -967,11 +1090,6 @@ OP_400 () } void -OP_160 () -{ -} - -void OP_700 () { } |