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B

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.

313029282726252423222120191817161514131211109876543210
000101imm26
op

26-bit signed PC-relative branch offset

B <label>

BranchType branch_type = if op == '1' then BranchType_DIRCALL else BranchType_DIR; bits(64) offset = SignExtend(imm26:'00', 64);

Assembler Symbols

<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.

Operation

if branch_type == BranchType_DIRCALL then X[30] = PC[] + 4; BranchTo(PC[] + offset, BranchType_DIR);[] + offset, branch_type);


Internal version only: isa v31.05b, AdvSIMD v29.02, pseudocode v2019-12_rc3_1, sve v2019-12_rc3 ; Build timestamp: 2019-12-13T11:3502

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