ARM ARM1176JZF-S User Manual

VFP Exception Handling
ARM DDI 0301H Copyright © 2004-2009 ARM Limited. All rights reserved. 22-25
ID012310 Non-Confidential, Unrestricted Access
In the Unsigned results and Signed results columns, the rounding mode notations are:
N Round-to-nearest mode.
P Round-towards-plus-infinity mode.
M Round-towards-minus infinity mode.
Z Round-towards-zero mode.
Table 22-12 lists the single-precision float-to-integer bounce range and the results returned for
exceptional conditions. The exponent values that Table 22-12 lists are in biased format.
Table 22-12 Single-precision float-to-integer bounce thresholds and stored results
Floating-point
value Integer value Unsigned result Status Signed result Status Response
NaN -
0x00000000 Invalid 0x00000000 Invalid Bounce all
0x7F800000 +infinity 0xFFFFFFFF Invalid 0x7FFFFFFF Invalid Bounce all
0x7F7FFFFF
to
0x4F800000
+maximum SP
a
to
2
32
0xFFFFFFFF Invalid 0x7FFFFFFF Invalid Bounce all
0x4F7FFFFF
to
0x4F000000
2
32
– 2
8
to
2
31
0xFFFFFF00
to
0x80000000
Va li d 0x7FFFFFFF Invalid Bounce S UnZ
0x4EFFFFFF
to
0x4E800000
2
31
– 2
7
to
2
30
0x7FFFFF80
to
0x40000000
Va li d 0x7FFFFF80
to
0x40000000
Valid Bounce SnZ
0x4E7FFFFF
to
0x00000000
2
30
– 2
6
to
+0
0x3FFFFFC0
to
0x00000000
Va li d 0x3FFFFFC0
to
0x00000000
Valid No bounce
0x80000000
to
0xCE7FFFFF
–0
to
–2
30
+ 2
6
0x00000000
Invalid
b
0x00000000
to
0xC0000040
Valid Bounce U
0xCE800000
to
0xCEFFFFFF
–2
30
to
–2
31
+ 2
7
)
0x00000000 Invalid 0xC0000000
to
0x80000080
Valid Bounce U
0xCF000000
–2
31
0x00000000 Invalid 0x80000000 Valid Bounce U SnZ
0xCF000000
to
0xFF7FFFFF
–2
31
to
–maximum SP
0x00000000 Invalid 0x80000000 Invalid Bounce all
0xFF800000 –infinity 0x00000000 Invalid 0x80000000 Invalid Bounce all
a. SP = single-precision.
b. A negative input value that rounds to a zero result returns zero and is not invalid.

ARM ARM1176JZF-S Specifications

General

Brand	ARM
Model	ARM1176JZF-S
Category	Computer Hardware
Language	English