AMD-K6-2E Datasheet, PDF (50/332 Pages) Advanced Micro Devices – AMD-K6™-2E Embedded Processor

AMD-K6™-2E Processor Data Sheet
Preliminary Information
22529B/0—January 2000
MMX™ Data Types
Packed Bytes Integer
63
56 55
For the MMX instructions, the MMX registers use three types of
data — packed 8-byte integer, packed quadword integer, and
packed dual doubleword integer. Figure 18 shows the format of
the MMX data types.
48 47
40 39
32 31
24 23
16 15
87
0
Byte 7
Byte 6
Byte 5
Byte 4
Byte 3
Byte 2
Byte 1
Byte 0
Packed Words Integer
63
48 47
32 31
16 15
0
Word 3
Word 2
Word 1
Word 0
Packed Doubleword Integer
63
32 31
0
Doubleword 1
Doubleword 0
Figure 18. MMX™ Data Types
32
Software Environment
Chapter 3