Chapter 38. TIC54X Dependent Features

213

$tanh(

expr

)

Returns the floating point hyperbolic tangent of

expr

.

$trunc(

expr

)

Returns the integer value of

expr

truncated towards zero as floating point.

38.8. Extended Addressing

The

LDX

pseudo op is provided for loading the extended addressing bits of a label or address. For

example, if an address

_label

resides in extended program memory, the value of

_label

may be

loaded as follows:

ldx

#_label,16,a

; loads extended bits of _label

or

#_label,a

; loads lower 16 bits of _label

bacc

a

; full address is in accumulator A

38.9. Directives

.align [size]

.even

Align the section program counter on the next boundary, based on

size

.

size

may be any power

of 2.

.even

is equivalent to

.align

with a

size

of 2.

1

Align SPC to word boundary

2

Align SPC to longword boundary (same as .even)

128

Align SPC to page boundary

.asg string, name

Assign

name

the string

string

. String replacement is performed on

string

before assignment.

.eval string, name

Evaluate the contents of string

string

and assign the result as a string to the subsym

name

.

String replacement is performed on

string

before assignment.

.bss symbol, size [, [blocking_flag] [,alignment_flag]]

Reserve space for

symbol

in the .bss section.

size

is in words. If present,

blocking_flag

indicates the allocated space should be aligned on a page boundary if it would otherwise cross

a page boundary. If present,

alignment_flag

causes the assembler to allocate

size

on a long

word boundary.