ST STM32H7 Series User Manual

The STM32 Cortex-M4 instruction set PM0214
138/262 PM0214 Rev 9
Restrictions
Do not use SP and do not use PC.
Condition flags
These instructions do not affect the flags.
Examples
SXTAH R4, R8, R6, ROR #16 ; Rotates R6 right by 16 bits, obtains bottom
; halfword, sign extends to 32 bits, adds R8,and
; writes to R4
UXTAB R3, R4, R10 ; Extracts bottom byte of R10 and zero extends to 32
; bits, adds R4, and writes to R3.
3.9 Bitfield instructions
Table 32 shows the instructions that operate on adjacent sets of bits in registers or bitfields.
Table 32. Instructions that operate on adjacent sets of bits
Mnemonic Brief description See
BFC Bit field clear BFC and BFI on page 139
BFI Bit field insert BFC and BFI on page 139
SBFX Signed bit field extract SBFX and UBFX on page 140
SXTB Sign extend a byte SXT and UXT on page 141
SXTH Sign extend a halfword SXT and UXT on page 141
UBFX Unsigned bit field extract SBFX and UBFX on page 140
UXTB Zero extend a byte SXT and UXT on page 141
UXTH Zero extend a halfword SXT and UXT on page 141

ST STM32H7 Series Specifications

General

Brand	ST
Model	STM32H7 Series
Category	Computer Hardware
Language	English