Mips Technologies R4000 - Page 55

MIPS R4000 Microprocessor User's Manual 25
Introduction
In this text, bit 0 is always the least-significant (rightmost) bit; thus, bit
designations are always little-endian (although no instructions explicitly
designate bit positions within words).
Figures 1-6 and 1-7 show little-endian and big-endian byte ordering in
doublewords.
Figure 1-6 Little-Endian Data in a Doubleword
Figure 1-7 Big-Endian Data in a Doubleword
31 24 23 16 15 8 7 0
76
4
Byte #
Word
Bit #
5
70123456
Bits in a Byte
Bit #
Halfword
Byte
32 01
63 56 55 48 47 40 39 32
Most-significant byte
Least-significant byte
01 3
Byte #
Word
Bit #
2
07654321
Bits in a Byte
Bit #
Halfword
Byte
45 76
31 24 23 16 15 8 7 063 56 55 48 47 40 39 32
Most-significant byte
Least-significant byte