NEG — Negate

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
NEG 01100000 0000 0000
r 3210
t 3210

Assembler Syntax

NEG ar, at

C Syntax

#include <xtensa/tie/xt_core.h>

extern int XT_NEG(int t);

Description

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

NEG calculates the two's complement negation of the contents of address register at and writes it to address register ar. Arithmetic overflow is not detected.

Operation

AR[r] ← 0 − AR[t]

Exceptions

EveryInstR Group (see EveryInstR Group:)

Implementation Pipeline

In Out
art Estage arr Estage

Protos that use NEG

proto NEG { out int32 r, in int32 t }{}{
NEG r, t;
}