Sun Microelectronics
222
UltraSPARC User’s Manual
Traps:
fp_disabled
13.5.10 Three-Dimensional Array Addressing Instructions
Format (3):
Description:
These instructions convert three dimensional (3D) fixed-point addresses con-
tained in rs1 to a blocked-byte address; they store the result in rd. Fixed-point ad-
dresses typically are used for address interpolation for planar reformatting
operations. Blocking is performed at the 64-byte level to maximize external cache
block reuse, and at the 64k-byte level to maximize TLB entry reuse, regardless of
the orientation of the address interpolation. These instructions specify an element
size of 8 (ARRAY8), 16 (ARRAY16) or 32 bits (ARRAY32). The rs2 operand speci-
fies the power-of-two size of the X and Y dimensions of a 3D image array. The
legal values for rs2 and their meanings are shown in the following table. Illegal
values will produce undefined results in the rd register.
opcode opf operation
ARRAY8
0 0001 0000
Convert 8-bit 3-D address to blocked byte address
ARRAY16
0 0001 0010
Convert 16-bit 3-D address to blocked byte address
ARRAY32
0 0001 0100
Convert 32-bit 3-D address to blocked byte address
Suggested Assembly Language Syntax
array8
reg
rs1
,
reg
rs2
,
reg
rd
array16
reg
rs1
,
reg
rs2
,
reg
rd
array32
reg
rs1
,
reg
rs2
,
reg
rd
rs2
Value
Number of
Elements
064
1 128
2 256
3 512
4 1,024
5 2,048
10 11 0110 rs2rd rs1
31 141924 18 13 02530 29 4
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