/sys$common/syshlp/helplib.hlb MACRO, VAX MACRO Assembler, Instructions, BLBx *Conan The Librarian (sorry for the slow response - running on an old VAX) |
Purpose: Branch on low bit - test bit Format: opcode src.rl,displ.bb Operation: teststate = if {BLBS} then 1 else 0; if src<0> EQL teststate then PC = {PC + SEXT (displ)} C. Codes: Not affected Exceptions: None Opcodes: E8 BLBS Branch on low bit set E9 BLBC Branch on low bit clear Description: The LSB of src is tested and if it is equal to the test state indicated by the instruction, the branch is taken.
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