SpinAsm AND and SpinAsm SOF: Difference between pages

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==AND==
== SOF ==
{| class="wikitable"
{| class="wikitable"
|+
|+
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!Instruction coding
!Instruction coding
|-
|-
|AND
|SOF
|ACC & MASK
|C * ACC + D
|MMMMMMMMMMMMMMMMMMMMMMMM000001110
|CCCCCCCCCCCCCCCCDDDDDDDDDDD01101
|}
|}


======Description======
====== Description ======
AND will perform a bit wise "and" of the current ACC and the 24­bit MASK specified within the instruction word. The instruction might be used to load a constant into ACC provided ACC contains $FFFFFF or to clear ACC if MASK equals $000000. (see also the pseudo opcode section)
SOF will multiply the current value in ACC with C and will then add the constant D to the result. Please note the absence of an integer entry format for D. This is not by mistake but it should emphasize that D is not intended to become used for integer arithmetic. The reason for this instruction is that the 11 bit constant D would be placed into ACC left justified or in other words 13 bits shifted to the left. D is intended to offset ACC by a constant in the range from –1 to +0.9990234375.
 
====== Parameters ======
{| class="wikitable"
{| class="wikitable"
|+
|+
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!Entry formats, range
!Entry formats, range
|-
|-
|M
|C
|24 Bit
|16 Bit
|Binary
|Real (S1.14)
Hex ($000000 - $FFFFFF)
Hex ($0000 ­ $FFFF)  
 
Symbolic
|-
|D
|11 Bit
|Real(S.10)
Symbolic
Symbolic
|}
|}


======Syntax======
====== Syntax ======
AND M
SOF C,D


======Coding Example======
====== Coding Example ======
<syntaxhighlight line="1">
<syntaxhighlight line="1">
AMASK EQU  $F0FFFF                  ;  
Off  EQU  1.0                  ;  
                                    ;  
                                ;  
;------------------------------------
; Halve way rectifier ­­­­­­­­
or $FFFFFF                          ; Set all bits within ACC
sof 0,0                       ; Clear ACC
and $FFFFFE                       ; Clear LSB
rdax ADCL,1.0                  ; Read from left ADC channel
and  %01111111_11111111_11111111    ; Clear MSB
sof 1.0,Off                    ; Subtract offset
and AMASK                          ; Clear ACC[19..16]
sof 1.0,Off                    ; Add offset
and $0                             ; Clear ACC
</syntaxhighlight>
</syntaxhighlight>

Latest revision as of 20:54, 6 January 2023

SOF

Mnemonic Operation Instruction coding
SOF C * ACC + D CCCCCCCCCCCCCCCCDDDDDDDDDDD01101
Description

SOF will multiply the current value in ACC with C and will then add the constant D to the result. Please note the absence of an integer entry format for D. This is not by mistake but it should emphasize that D is not intended to become used for integer arithmetic. The reason for this instruction is that the 11 bit constant D would be placed into ACC left justified or in other words 13 bits shifted to the left. D is intended to offset ACC by a constant in the range from –1 to +0.9990234375.

Parameters
Name Width Entry formats, range
C 16 Bit Real (S1.14)

Hex ($0000 ­ $FFFF) Symbolic

D 11 Bit Real(S.10)

Symbolic

Syntax

SOF C,D

Coding Example
Off  EQU  1.0                   ; 
                                ; 
; Halve way rectifier ­­­­­­­­
sof  0,0                        ; Clear ACC 
rdax ADCL,1.0                   ; Read from left ADC channel
sof  1.0,Off                    ; Subtract offset 
sof  1.0,Off                    ; Add offset
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