Instructions for SCU
SCU stands for Scalar Computing Unit, which supports most general computation related instructions.
Arithmetic
| Assembly |
Operation |
Completing stage |
| Rs = Rm + Rn {(U)} {(T)} |
Integer add |
EX2 |
| Rs = Rm - Rn {(U)} {(T)} |
Integer sub |
EX2 |
| Rs = Rm + Rn {(U)} {(T)} CI |
Integer add with carry |
EX2 |
| Rs = Rm - Rn {(U)} {(T)} CI |
Integer sub with carry |
EX2 |
| Rs = Rm - Rn {(U)} {(T)} CI |
Integer sub with carry |
EX2 |
| Rs = Rm * Rn {(U)} |
Integer multiply |
EX4 |
Logic
| Assembly |
Operation |
Completing stage |
| Rs = ABS Rm |
Absolute value |
EX2 |
| Rs = Rm & Rn |
Bitwise and |
EX2 |
| Rs = Rm | Rn |
Bitwise or |
EX2 |
| Rs = Rm ^ Rn |
Bitwise xor |
EX2 |
| Rs = ~ Rm |
Not |
EX2 |
| Rs = Rm == Rn |
Equal |
EX2 |
| Rs = Rm != Rn |
Not Equal |
EX2 |
| Rs = Rm > Rn {(U)} |
Big |
EX2 |
| Rs = Rm >= Rn {(U)} |
Big or equal |
EX2 |
| Rs = Rm < Rn {(U)} |
Less |
EX2 |
| Rs = Rm <= Rn {(U)} |
Less or equal |
EX2 |
| Rs = Rm << Rn |
Logic left shift |
EX2 |
| Rs = Rm << Imm5 |
Logic left shift with Imm |
EX2 |
| Rs = Rm >> Rn |
Logic right shift |
EX2 |
| Rs = Rm >> Imm5 |
Logic right shift with Imm |
EX2 |
32 bits Float
| Assembly |
Operation |
Completing stage |
| Rs = Rm + Rn {(T)} (S) |
32 bits float add |
EX5 |
| Rs = Rm - Rn {(T)} (S) |
32 bits float sub |
EX5 |
| Rs = Rm * Rn {(T)} (S) |
32 bits float mul |
EX5 |
| Rs = ABS Rm (S) |
32 bits float absolute value |
EX5 |
| Rs = RECIP Rm (S) |
32 bits float reciprocal |
EX5 |
| Rs = RSQRT Rm (S) |
32 bits float reciprocal square root |
EX5 |
| Rs = Rm > Rn (S) |
Big |
EX5 |
| Rs = Rm >= Rn (S) |
Big or equal |
EX5 |
| Rs = Rm < Rn (S) |
Less |
EX5 |
| Rs = Rm <= Rn (S) |
Less or equal |
EX5 |
| Rs = SINGLE Rm {(U)}{(T)} |
Convert integer to single float |
EX5 |
| Rs = INT Rm {(T)}(S) |
Convert single float to integer |
EX5 |
64 bits Float
| Assembly |
Operation |
Completing stage |
| DRs = DRm + DRn {(T)} (D) |
64 bits float add |
EX5 |
| DRs = DRm - DRn {(T)} (D) |
64 bits float sub |
EX5 |
| DRs = DRm * DRn {(T)} (D) |
64 bits float mul |
EX5 |
| DRs = ABS DRm (D) |
64 bits float absolute value |
EX5 |
| DRs = RECIP DRm (D) |
64 bits float reciprocal |
EX5 |
| DRs = RSQRT DRm (D) |
64 bits float reciprocal square root |
EX5 |
| DRs = DRm > DRn (D) |
Big |
EX5 |
| DRs = DRm >= DRn (D) |
Big or equal |
EX5 |
| DRs = DRm < DRn (D) |
Less |
EX5 |
| DRs = DDRm <= DRn (D) |
Less or equal |
EX5 |
| DRs = DOUBLE Rm {(U)} |
Convert integer to double float |
EX5 |
| DRs = DOUBLE Rm (S) |
Convert single float to double float |
EX5 |
| Rs = INT DRm {(T)}(D) |
Convert double float to integer |
EX5 |
| Rs = SINGLE DRm {(T)}(D) |
Convert double float to single float |
EX5 |
<—— [ISA] [AGU] ——>
