Vcvtb, Vcvtt - ST STM32F4 Series Programming Manual

PM0214
3.10.6

VCVTB, VCVTT

Converts between a half-precision value and a single-precision value.
Syntax
VCVT{y}{cond}.F32.F16 Sd, Sm
VCVT{y}{cond}.F16.F32 Sd, Sm
Where:
•
'y' Specifies which half of the operand register Sm or destination register Sd is used for
the operand or destination:
If y is B, then the bottom half, bits [15:0], of Sm or Sd is used.
If y is T, then the top half, bits [31:16], of Sm or Sd is used.
• 'cond' is an optional condition code, see
•
'Sd' is the destination register
• 'Sm' is the operand register.
Operation
This instruction with the .F16.32 suffix:
1. Converts the half-precision value in the top or bottom half of a single-precision. register
to single-precision.
2. Writes the result to a single-precision register.
This instruction with the .F32.F16 suffix:
1. Converts the value in a single-precision register to half-precision.
2. Writes the result into the top or bottom half of a single-precision register, preserving the
other half of the target register.
Restrictions
There are no restrictions.
Condition flags
These instructions do not change the flags.
Conditional execution on page
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The STM32 Cortex-M4 instruction set
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