Vector Saturating Doubling Multiply instructions multiply their operands and double the results. They return only the high half of the results.
If any of the results overflow, they are saturated. The sticky QC flag (FPSCR bit[27]) is set if saturation occurs.
Syntax
VQ{R}DMULH{cond}.datatype {Qd}, Qn, Qm
VQ{R}DMULH{cond}.datatype {Dd}, Dn, Dm
VQ{R}DMULH{cond}.datatype {Qd}, Qn, Dm[x]
VQ{R}DMULH{cond}.datatype {Dd}, Dn, Dm[x]
where:
Rif present, indicates that each result is rounded. Otherwise, each result is truncated.
condis an optional condition code.
datatypemust be either
S16orS32.Qd,Qnare the destination vector and the first operand vector, for a quadword operation.
Dd,Dnare the destination vector and the first operand vector, for a doubleword operation.
QmorDmis the vector holding the second operand, for a by vector operation.
Dm[x]is the scalar holding the second operand, for a by scalar operation.
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