BLR

Branch with Link to Register calls a subroutine at an address in a register, setting register X30 to PC+4.

313029282726252423222120191817161514131211109876543210
1101011000111111000000Rn00000
op

Integer

BLR <Xn>

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();

Assembler Symbols

<Xn>

Is the 64-bit name of the general-purpose register holding the address to be branched to, encoded in the "Rn" field.

Operation

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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