brkn

BRKN <Pdm>.B, <Pg>/Z, <Pn>.B, <Pdm>.B

Break to Next Partition.

Pseudocode Operation

No pseudocode available.

Encoding

Binary Layout
001001010
31:23
0
22
01100001
21:14
Pg
13:10
0
9
Pn
8:5
0
4
Pdm
3:0
 
Format SVE
Opcode 0x25184000
Extension SVE

Related

More in SVE

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding Instruction ISA Bit pattern
0x25184000 BRKN <Pdm>.B, <Pg>/Z, <Pn>.B, <Pdm>.B A64 001001010 | 0 | 01100001 | Pg | 0 | Pn | 0 | Pdm

Description

If the last active element of the first source predicate is false then set the destination predicate to all-false. Otherwise leaves the destination and second source predicate unchanged. Does not set the condition flags.

Operation

CheckSVEEnabled();
constant integer VL = CurrentVL;
constant integer PL = VL DIV 8;
bits(PL) mask = P[g, PL];
bits(PL) operand1 = P[n, PL];
bits(PL) operand2 = P[dm, PL];
bits(PL) result;

if LastActive(mask, operand1, 8) == '1' then
    result = operand2;
else
    result = Zeros(PL);

if setflags then
    PSTATE.<N,Z,C,V> = PredTest(Ones(PL), result, 8);
P[dm, PL] = result;