- Synopsis
-
Reverse the byte order of a word operand.
- Mnemonic
-
th.revw rd, rs1
- Encoding
{reg:[
{ bits: 7, name: 0xb, attr: ['custom-0, 32 bit'] },
{ bits: 5, name: 'rd' },
{ bits: 3, name: 0x1, attr: ['Arithmetic'] },
{ bits: 5, name: 'rs1' },
{ bits: 5, name: 0x0 },
{ bits: 2, name: 0x0 },
{ bits: 5, name: 0x12 },
]}
- Description
-
This operation reverses the byte order of the 32-bit value in rs1 and stores the result in rd.
- Operation
for i=0..3:
j := 3 - i
tmp[i] := reg[rs1][j]
reg[rd] := tmp- Permission
-
This instruction can be executed in all privilege levels.
- Exceptions
-
This instruction does not trigger any exceptions.
- Included in
| Extension |
|---|
XTheadBb ([xtheadbb]) |