TotalView Users Guide - CI Wiki

Using the Evaluate Window
You write assembler expressions in the target machine’s native assembler
language and in a TotalView assembler language. However, the operators
available to construct expressions in instruction operands, and the set of
available pseudo-operators, are the same on all machines, and are described
below.
The TotalView assembler accepts instructions using the same mnemonics
recognized by the native assembler, and it recognizes the same names for
registers that native assemblers recognize.
Some architectures provide extended mnemonics that do not correspond
exactly with machine instructions and which represent important, special
cases of instructions, or provide for assembling short, commonly used
sequences of instructions. The TotalView assembler recognizes mnemonics
if:
� They assemble to exactly one instruction.
� The relationship between the operands of the extended mnemonics and
the fields in the assembled instruction code is a simple one-to-one correspondence.
Assembler language labels are indicated as name: and appear at the beginning
of a line. You can place a label alone on a line. The symbols you can
use include labels defined in the assembler expression and all program
symbols.
The TotalView assembler operators are described in the following table:
Operators Description
+ Plus
– Minus (also unary)
* Multiplication
# Remainder
/ Division
& Bitwise AND
^ Bitwise XOR
! Bitwise OR NOT (also unary minus, bitwise NOT)
| Bitwise OR
(expr) Grouping
> Right shift
“text” Text string, 1-4 characters long, is right-justified in a 32-bit
word
hi16 (expr) Low 16 bits of operand expr
hi32 (expr) High 32 bits of operand expr
lo16 (expr) High 16 bits of operand expr
lo32 (expr) Low 32 bits of operand expr
The TotalView assembler pseudo-operations are as follows:
392 Chapter 17: Evaluating Expressions