sqabs

SQABS <Zd>.<T>, <Pg>/M, <Zn>.<T>

Signed Saturating Absolute.

Pseudocode Operation

No pseudocode available.

Encoding

Binary Layout

01000100

31:24

size

23:22

21:20

101

15:13

12:10

9:5

4:0

Format SVE2

Opcode 0x4408A000

Extension SVE2

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction	ISA	Bit pattern
0x5E207800	SQABS <V><d>, <V><n>	A64	01 \| 0 \| 11110 \| size \| 10000 \| 00111 \| 10 \| Rn \| Rd
0x0E207800	SQABS <Vd>.<T>, <Vn>.<T>	A64	0 \| Q \| 0 \| 01110 \| size \| 10000 \| 00111 \| 10 \| Rn \| Rd
0x4408A000	SQABS <Zd>.<T>, <Pg>/M, <Zn>.<T>	A64	01000100 \| size \| 00 \| 1 \| 0 \| 0 \| 0 \| 101 \| Pg \| Zn \| Zd

Description

Compute the absolute value of the signed integer in each active element of the source vector, and place the results in the corresponding elements of the destination vector. Each result element is saturated to the N-bit element's signed integer range -2(N-1) to (2(N-1) )-1. Inactive elements in the destination vector register remain unmodified.

Operation

CheckSVEEnabled();
constant integer VL = CurrentVL;
constant integer PL = VL DIV 8;
constant integer elements = VL DIV esize;
bits(PL) mask = P[g, PL];
bits(VL) operand = if AnyActiveElement(mask, esize) then Z[n, VL] else Zeros(VL);
bits(VL) result = Z[d, VL];

for e = 0 to elements-1
    if ActivePredicateElement(mask, e, esize) then
        integer element = SInt(Elem[operand, e, esize]);
        element = Abs(element);
        Elem[result, e, esize] = SignedSat(element, esize);

Z[d, VL] = result;