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Branch causes an unconditional branch to a label at a PC-relative offset, with a hint that this is not a subroutine call or 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 |
0 | 0 | 0 | 1 | 0 | 1 | imm26 | |||||||||||||||||||||||||
op |
B <label>
BranchType branch_type = if op == '1' then BranchType_DIRCALL else BranchType_DIR; bits(64) offset = SignExtend(imm26:'00', 64);
<label> | Is the program label to be unconditionally branched to. Its offset from the address of this instruction, in the range +/-128MB, is encoded as "imm26" times 4. |
if branch_type == BranchType_DIRCALL then
ifthen HaveCSRExt() && CallStackRecordingActive() then
AddCallStackRecord();
X[30] = PC[] + 4;
BranchTo(PC[] + offset, branch_type);
Internal version only: isa v32.12v32.06, AdvSIMD v29.04, pseudocode v2020-09_xmlv2020-06_rel, sve v2020-09_rc2bv2020-06_rel0
; Build timestamp: 2020-09-30T192020-07-03T13:1613
Copyright © 2010-2020 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.
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