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Extended Addressing Support
3-30
Table 3–3. Assembler Built-In Math Functions (Continued)
Function
Description
$pow(
expr1, expr2)
raises
expr1 to the power expr 2
$round(
expr)
returns the result of
expr rounded to the nearest integer
$sgn(
expr)
returns the sign of
expr
$sin(
expr)
returns the sine of
expr as a floating-point value
$sinh(
expr)
returns the hyperbolic sine of
expr as a floating-point
value
$sqrt(
expr)
returns the square root of
expr as a floating-point value
$tan(
expr)
returns the tangent of
expr as a floating-point value
$tanh(
expr)
returns the hyperbolic tangent of
expr as a floating-point
value
$trunc(
expr)
returns the result of
expr rounded toward zero
3.11 Extended Addressing Support
The assembler accepts a pseudo-op, LDX, for loading the value of a label,
function, etc. that resides (or may reside) in extended program memory. LDX
is used to load the upper 8 bits of a 24-bit address.
For example, if a function, F1, is in extended program memory (which is 24 bits
instead of 16), the value or address of F1 may be loaded as follows:
LDX
#F1,16,A
;loads the upper 8 bits of the 24-bit
;address of F1
OR
#F1,A,A
;adds in the lower 16 bits of the
;address of F1
BACC
A
;all 24 bits of F1 have been loaded
;into accumulator A
Note that it is necessary to use both LDX and OR to load the entire 24-bit
address.
Built-in Functions / Extended Addressing Support
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