Branch to Register branches unconditionally to an address in a register, with a hint that this is not a subroutine return.
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | Rn | 0 | 0 | 0 | 0 | 0 | ||||
op |
integer n = UInt(Rn); BranchType branch_type; case op of when '00' branch_type = BranchType_JMP; when '01' branch_type = BranchType_CALL; when '10' branch_type = BranchType_RET; otherwise UnallocatedEncoding();
bits(64) target = X[n]; if branch_type == BranchType_CALL then X[30] = PC[] + 4; BranchTo(target, branch_type);
Internal version only: isa v25.07, AdvSIMD v23.0, pseudocode v31.3
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