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PM0214 bảng dữ liệu(PDF) 104 Page - STMicroelectronics

tên linh kiện PM0214
Giải thích chi tiết về linh kiện  This programming manual provides information
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PM0214 bảng dữ liệu(HTML) 104 Page - STMicroelectronics

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The STM32 Cortex-M4 instruction set
PM0214
104/245
DocID022708 Rev 4
3.5.21
SEL
Select bytes. Selects each byte of its result from either its first operand or its second
operand, according to the values of the GE flags.
Syntax
SEL{<c>}{<q>} {<Rd>,} <Rn>, <Rm>
where:
•
<c>, <q> are standard assembler syntax fields.
•
<Rd> is the destination register.
•
<Rn> is the first operand register.
•
<Rm> is the second operand register.
Operation
The SEL instruction:
1.
Reads the value of each bit of APSR.GE.
2.
Depending on the value of APSR.GE, assigns the destination register the value of
either the first or second operand register.
Restrictions
None.
Condition flags
These instructions do not change the flags.
Examples
SADD16 R0, R1, R2
; Set GE bits based on result
SEL R0, R0, R3
; Select bytes from R0 or R3, based on GE.



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