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RACW
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Round the accumulator word
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RACW
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Round ACcumulator Word
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[Syntax]
RACW src
[Operation]
signed long long tmp;
tmp = (signed long long) ACC << src;
tmp = tmp + 0000000080000000h;
if (tmp > (signed long long) 00007FFF00000000h)
ACC = 00007FFF00000000h;
else if (tmp < (signed long long) FFFF800000000000h)
ACC = FFFF800000000000h;
else
ACC = tmp & FFFFFFFF00000000h
[Function]
- | This instruction rounds the value of the accumulator into a word and stores the result in the accumulator. |
- | The RACW instruction is executed according to the following procedures. |
- | The value of the accumulator is shifted to the left by one or two bits as specified by src |
- | The value of the accumulator changes according to the value of 64 bits after the contents have been shifted to the left by one or two bits. |
[Instruction Format]
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RACW src
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#IMM:1
(IMM:1 = 1～2)
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[Flag Change]
- | This instruction does not affect the states of flags. |
[Description Example]
RACW #1
RACW #2