Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO データシート

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

204

Floating-point multiply with negation followed by add or subtract.

Syntax

VNMLA{cond}.F32 Sd, Sn, Sm

VNMLS{cond}.F32 Sd, Sn, Sm

VNMUL{cond}.F32 {Sd,} Sn, Sm

where:

cond

is an optional condition code, see 

.

Sd

is the destination floating-point register.

Sn, Sm

are the operand floating-point registers.

Operation

The VNMLA instruction:

1.

Multiplies two floating-point register values.

2.

Adds the negation of the floating-point value in the destination register to the negation of the product.

3.

Writes the result back to the destination register.

The VNMLS instruction:

1.

Multiplies two floating-point register values.

2.

Adds the negation of the floating-point value in the destination register to the product.

3.

Writes the result back to the destination register.

The VNMUL instruction:

1.

Multiplies together two floating-point register values.

2.

Writes the negation of the result to the destination register.

Restrictions

There are no restrictions.

Condition Flags

These instructions do not change the flags.