Index

BR

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
Z op A M Rm

BR <Xn>

integer n = UInt(Rn);

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, 64];

// Value in BTypeNext will be used to set PSTATE.BTYPE
if InGuardedPage then
    if n == 16 || n == 17 then
        BTypeNext = '01';
    else
        BTypeNext = '11';
else
    BTypeNext = '01';
BranchTo(target, BranchType_INDIR, FALSE);