lxsuwb
Load scaled indexed byte with unsigned word index
This instruction is defined by:
Synopsis
Load 8 bits of data into register xd from the effective address
X[xs2] + zext32(X[xs1]), where xs2 is the base and xs1 is the index.
The index is zero-extended from X[xs1][31:0] before forming the address.
Sign extend the loaded byte to 64 bits.
This instruction is defined only for RV64.
Decode Variables
Bits<5> xs2 = $encoding[24:20];
Bits<5> xs1 = $encoding[19:15];
Bits<5> xd = $encoding[11:7];Execution
-
Pruned, XLEN == 64
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Original
XReg virtual_address = X[xs2] + X[xs1][31:0];
X[xd] = sext(read_memory(8, virtual_address, $encoding), 8);XReg virtual_address = X[xs2] + X[xs1][31:0];
X[xd] = sext(read_memory(8, virtual_address, $encoding), 8);