BFMINNM

BFloat16 floating-point minimum number (predicated)

Determine the minimum number value of active BFloat16 elements of the second source vector and corresponding BFloat16 elements of the first source vector and destructively place the results in the corresponding elements of the first source vector.

Regardless of the value of FPCR.AH, the behavior is as follows:

Inactive elements in the destination vector register remain unmodified.

This instruction follows SVE2 non-widening BFloat16 numerical behaviors.

ID_AA64ZFR0_EL1.B16B16 indicates whether this instruction is implemented.

SVE2
(FEAT_SVE_B16B16)

313029282726252423222120191817161514131211109876543210
0110010100000101100PgZmZdn
size<1>size<0>

BFMINNM <Zdn>.H, <Pg>/M, <Zdn>.H, <Zm>.H

if !IsFeatureImplemented(FEAT_SVE_B16B16) then UNDEFINED; constant integer g = UInt(Pg); constant integer dn = UInt(Zdn); constant integer m = UInt(Zm);

Assembler Symbols

<Zdn>

Is the name of the first source and destination scalable vector register, encoded in the "Zdn" field.

<Pg>

Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" 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 PL = VL DIV 8; constant integer elements = VL DIV 16; constant bits(PL) mask = P[g, PL]; constant bits(VL) operand1 = Z[dn, VL]; constant bits(VL) operand2 = if AnyActiveElement(mask, 16) then Z[m, VL] else Zeros(VL); bits(VL) result; for e = 0 to elements-1 constant bits(16) element1 = Elem[operand1, e, 16]; if ActivePredicateElement(mask, e, 16) then constant bits(16) element2 = Elem[operand2, e, 16]; Elem[result, e, 16] = BFMinNum(element1, element2, FPCR); else Elem[result, e, 16] = element1; Z[dn, VL] = result;

Operational information

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


Internal version only: aarchmrs v2024-03_relA, pseudocode v2024-03_rel, sve v2024-03_rel ; Build timestamp: 2024-03-26T09:45

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