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PM0214 bảng dữ liệu(PDF) 136 Page - STMicroelectronics

tên linh kiện PM0214
Giải thích chi tiết về linh kiện  This programming manual provides information
PDF  245 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM0214 bảng dữ liệu(HTML) 136 Page - STMicroelectronics

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The STM32 Cortex-M4 instruction set
PM0214
136/245
DocID022708 Rev 4
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 137
BFI
Bit field insert
BFC and BFI on page 137
SBFX
Signed bit field extract
SBFX and UBFX on page 138
SXTB
Sign extend a byte
SXT and UXT on page 139
SXTH
Sign extend a halfword
SXT and UXT on page 139
UBFX
Unsigned bit field extract
SBFX and UBFX on page 138
UXTB
Zero extend a byte
SXT and UXT on page 139
UXTH
Zero extend a halfword
SXT and UXT on page 139



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