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Transcript
MAC
Multiply Accumulate
MAC
Instruction Fields (continued):
• sz field—Specifies the size of the input operands
— 0 word
— 1 longword
• Scale Factor field —Specifies the scale factor. This field is ignored when using
fractional operands.
— 00 none
— 01 product << 1
— 10 reserved
— 11 product >> 1
• U/Lx—Specifies which 16-bit operand of the source register, Rx, is used for a
word-sized operation.
— 0 lower word
— 1 upper word
• U/Ly—Specifies which 16-bit operand of the source register, Ry, is used for a
word-sized operation.
— 0 lower word
— 1 upper word
Chapter 6. EMAC User Instructions
6-3