BALL — Branch if All Bits Set

Instruction Word

Slot
Inst
6
3
6
2
6
1
6
0
5
9
5
8
5
7
5
6
5
5
5
4
5
3
5
2
5
1
5
0
4
9
4
8
4
7
4
6
4
5
4
4
4
3
4
2
4
1
4
0
3
9
3
8
3
7
3
6
3
5
3
4
3
3
3
2
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9876543210
Format x24 - 24 bit(s) 0
BALL 0100 0111
s 3210
t 3210
imm8 76543210

Assembler Syntax

BALL as, at, label

Description

(please consult the Xtensa ® Instruction Set Architecture Reference Manual for any cross references and additional information)

BALL branches if all the bits specified by the mask in address register at are set in address register as. The test is performed by taking the bitwise logical and of at and the complement of as, and testing if the result is zero.

The target instruction address of the branch is given by the address of the BALL instruction, plus the sign-extended 8-bit imm8 field of the instruction plus four. If any of the masked bits are clear, execution continues with the next sequential instruction.

The inverse of BALL is BNALL.

Operation

if ((not AR[s]) and AR[t]) = 032 then
	nextPC ← PC + (imm8724||imm8) + 4
endif

Exceptions

EveryInstR Group (see EveryInstR Group:)