Vcvt, Vcvtr Between Floating-Point And Integer - ST STM32F4 Series Programming Manual

PM0214
3.10.4

VCVT, VCVTR between floating-point and integer

Converts a value in a register from floating-point to a 32-bit integer.
Syntax
VCVT{R}{cond}.Tm.F32 Sd, Sm
VCVT{cond}.F32.Tm Sd, Sm
Where:
•
'R' .
If R is specified, the operation uses the rounding mode specified by the FPSCR.
If R is omitted. the operation uses the Round towards Zero rounding mode.
•
'cond' is an optional condition code, see
•
'Tm' is the data type for the operand. It must be one of:
S32
U32
•
'Sd, Sm' are the destination register and the operand register.
Operation
These instructions:
1. Either
•
Converts a value in a register from floating-point value to a 32-bit integer.
•
Converts from a 32-bit integer to floating-point value.
2. Places the result in a second register.
The floating-point to integer operation normally uses the Round towards Zero rounding
mode, but can optionally use the rounding mode specified by the FPSCR.
The integer to floating-point operation uses the rounding mode specified by the FPSCR.
Restrictions
There are no restrictions.
Condition flags
These instructions do not change the flags.
signed 32-bit value.
unsigned 32-bit value.
DocID022708 Rev 6
The STM32 Cortex-M4 instruction set
Conditional execution on page 64.
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