Computer Hardware User's Guide

Unsigned-Integer Formats
5-3 Data Formats and Floating-Point Operation
5.2 Unsigned-Integer Formats
The ’C3x supports two unsigned-integer formats: a 16-bit short format and a
32-bit single-precision format.
Note:
In extended-precision registers, the unsigned-integer operands use only bits
31–0; bits 39–32 remain unchanged.
5.2.1 Short Unsigned-Integer Format
Figure 5–3 shows the16-bit, short, unsigned-integer format for immediate
unsigned-integer operands. For those instructions which assume unsigned-
integer operands, this format is zero filled to 32 bits. The range of a short
unsigned integer is 0
≤ si ≤ 2
16
.
Figure 5–3. Short Unsigned-Integer Format and Zero Fill
15 0
151631 0
Short unsigned-integer format
Zero fill of a short unsigned integer
0000000000000000
5.2.2 Single-Precision Unsigned-Integer Format
In the single-precision unsigned-integer format, the number is represented as
a 32-bit value, as shown in Figure 5–4. The range of a single-precision unsigned
integer is 0
≤ sp ≤ 2
32
.
Figure 5–4. Single-Precision Unsigned-Integer Format
31 0