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The TMS34010 C Language
4.6.2 Primary Expressions
K&R 7.1
In TMS34010 C, functions can return structures or unions. However, it is il-
legal to combine a function call with the structure-reference operator ".". Thus,
primary expressions of the form f(E).5 are not allowed. Note that this re-
striction does not apply to the indirect structure-reference operator " .... ", so
that f(E) ....
s
is legal.
The restriction of three array dimensions does not apply to expressions, be-
cause [ ] is treated as an operator.
4.6.3 Unary Operators in Expressions
K&R 7.2
The value yielded by the sizeof operator is calculated as the total number of
bits used to store the object divided by eight. (Eight is the number of bits in
a character.) Size of can be legally applied to enum objects and bit fields: if
the result is not an integer, it is rounded up to the nearest integer.
4.6.4 Assignment Operators in Expressions
K&R
7.14
The obsolete C assignment operator
=op
is recognized by TMS34010 C,
along with the current
op=.
Its use, however, causes a warning message to
be issued.
4.7 Declarations
4.7.1 Storage Class Specifiers in Declarations
K&R 8.1
The first four local objects declared as register in a function will be stored in
TMS34010 registers. A register can store float objects as well as objects of any
integer or pointer type, and will significantly improve the efficiency of ac-
cessing the object. See also Section 5.2, Register Conventions, page 5-4.
Register variables declared as short or char are treated as into
A register declaration of an invalid type or a declaration after the first four re-
gisters have been declared is treated as a normal auto declaration.
Note that functions' arguments declared as register are not implemented in this
release. The register class is ignored for argument variables.
4-5
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