Echelon Neuron - Manual (Page 129)

SBRZ (Short Branch If Zero)
The SBRZ instruction performs a conditional branch if TOS is zero. The SBRZ
instruction uses the (short) relative addressing mode. The SBRZ instruction
branches forward with an unsigned relative displacement of 1 to 16 bytes if TOS
is zero; otherwise, program operation continues with the next instruction. TOS is
consumed by this instruction. The displacement expression must resolve at link
time to a value in the range 0 to 15 (one less than the actual displacement
because the displacement calculation includes the size of the SBRZ operation
itself).
The Neuron Assembler also supports the use of a label for the displacement
expression; manual calculation of the displacement value is not required.
See also BRZ (Branch If Zero) for a longer conditional branch with the same
condition, and SBRNZ (Short Branch If Not Zero) for a short conditional branch
with the opposite condition.
The SBRZ instruction applies to Series 3100, 5000, and 6000 devices.
Syntax:
The SBRZ instruction requires a single operand to specify the displacement or
label:
SBRZ displacement
SBRZ label
Table 51 describes the attributes of the SBRZ instruction. In the table, the
asterisk (*) specifies the current value of the instruction pointer (IP).
Table 51. SBRZ Instruction
Instruction Hexadecimal
Opcode
Instruction
Size (Bytes)
CPU Cycles
Required
Affect on
Carry Flag
SBRZ *+1 40 1 3 None
SBRZ *+2 41 1 3 None
SBRZ *+3 42 1 3 None
SBRZ *+4 43 1 3 None
SBRZ *+5 44 1 3 None
SBRZ *+6 45 1 3 None
SBRZ *+7 46 1 3 None
SBRZ *+8 47 1 3 None
SBRZ *+9 48 1 3 None
Neuron Assembly Language Reference 119