Vnmla, Vnmls, Vnmul - ST STM32F3 Series Programming Manual

PM0214
3.10.23

VNMLA, VNMLS, VNMUL

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 value
•
'Sn, Sm' are the operand floating-point values.
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.
The STM32 Cortex-M4 instruction set
Conditional execution on page
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