UCLAMP

Unsigned clamp to minimum/maximum vector

Clamp each unsigned element in the destination vector to between the unsigned minimum value in the corresponding element of the first source vector and the unsigned maximum value in the corresponding element of the second source vector and destructively write the results in the corresponding elements of the destination vector. This instruction is unpredicated.

SVE2
(FEAT_SVE2p1)

313029282726252423222120191817161514131211109876543210
01000100size0Zm110001ZnZd
U

UCLAMP <Zd>.<T>, <Zn>.<T>, <Zm>.<T>

if !HaveSME() && !HaveSVE2p1() then UNDEFINED; constant integer esize = 8 << UInt(size); integer n = UInt(Zn); integer m = UInt(Zm); integer d = UInt(Zd);

Assembler Symbols

<Zd>

Is the name of the destination scalable vector register, encoded in the "Zd" field.

<T>

Is the size specifier, encoded in size:

size <T>
00 B
01 H
10 S
11 D
<Zn>

Is the name of the first source scalable vector register, encoded in the "Zn" field.

<Zm>

Is the name of the second source scalable vector register, encoded in the "Zm" field.

Operation

CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer elements = VL DIV esize; bits(VL) operand1 = Z[n, VL]; bits(VL) operand2 = Z[m, VL]; bits(VL) operand3 = Z[d, VL]; bits(VL) result; for e = 0 to elements-1 integer element1 = UInt(Elem[operand1, e, esize]); integer element2 = UInt(Elem[operand2, e, esize]); integer element3 = UInt(Elem[operand3, e, esize]); integer res = Min(Max(element1, element3), element2); Elem[result, e, esize] = res<esize-1:0>; Z[d, VL] = result;

Operational information

If PSTATE.DIT is 1:

This instruction might be immediately preceded in program order by a MOVPRFX instruction. The MOVPRFX instruction must conform to all of the following requirements, otherwise the behavior of the MOVPRFX and this instruction is unpredictable:


Internal version only: aarchmrs v2023-12_rel, pseudocode v2023-12_rel, sve v2023-12_rel ; Build timestamp: 2023-12-15T16:46

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