Zilog Z8F0130 - Manual (Page 314)

Using the Macro Assembler UM013037-1212
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Zilog Developer Studio II – Z8 Encore!
User Manual
HIGH <expression>
HIGH (and LOW ) takes the entire expression to the right of it as its operand. This means that
an expression such as
HIGH(PAOUT)|LOW(PAOUT&%f0)
is parsed as, in effect,
HIGH((PAOUT | LOW(PAOUT & %f0)))
If HIGH is only intended to operate on PAOUT in this example, its operation must be
restricted with parentheses.
For example:
(HIGH(PAOUT))|LOW(PAOUT&%f0)
HIGH16 and LOW16 Operators
The HIGH16 and LOW16 operators can be used to extract specific 16-bit words from an
integer expression. The LOW16 operator extracts the word starting at bit 0 of the expres-
sion; the HIGH16 operator extracts the word starting at bit 16 of the expression.
HIGH16 and LOW16 can also be used to extract portions of a floating-point value.
For example:
# LOW16 (X) ; 16 least significant bits of X

# HIGH16 (X) ; 16 most significant bits of X
.FTOL Operator
The .FTOL operator can be used to convert a floating-point value to an integer.
For example:
fval equ 12.34
segment CODE

LD r0,#.FTOL(fval) ; 12 is loaded into r0.
.LTOF Operator
The .LTOF operator can be used to convert an integer value to a floating-point value.
For example:
val equ 12

fval DF .LTOF(val)