MMIX Instruction Set
Content
Loading Unsigned Data
Name:| LDBU $X,$Y,$Z | LDBU $X,$Y,Z |
| LDWU $X,$Y,$Z | LDWU $X,$Y,Z |
| LDTU $X,$Y,$Z | LDTU $X,$Y,Z |
| LDOU $X,$Y,$Z | LDOU $X,$Y,Z |
Specification:
With A ← $Y+$Z respectively A ← $Y+Z we have:
| LDBU: u($X) | ← u(M1[A]) |
| LDWU: u($X) | ← u(M2[A]) |
| LDTU: u($X) | ← u(M4[A]) |
| LDOU: u($X) | ← u(M8[A]) |
Timing:
1μ + 1υ
Description:
Loads one byte, wyde, tetrabyte, or octabyte. The value is padded with zeros to the left to fill the 64-bit target register $X.
The address A is rounded down, if necessary, according to the alignment requirements. Addresses for octabytes must be a multiple of 8, for tetrabytes a multiple of 4, and for wydes a multiple of 2.
See also:
