Texas Instruments TI-89 Developer's Guide

504
Appendix A: System Routines — EStack Arithmetic
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
push0
Declaration:
void
push0
(void)
Category(ies):
EStack Arithmetic
Description:
Pushes a tagged float 0.0 if IS_ARITH_APPROX.
Otherwise pushes a tagged big-integer 0.
Inputs:
None
Outputs:
None
Assumptions:
None
Side Effects:
None
Availability:
On AMS 2.00 and higher.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: push1, push_pi, push_pi_on_quantum
Example:
void push_dense_poly_eval (EStackIndex i, EStackIndex j)
/* i indexes a list of polynomial coefficients in descending order of the
exponents of a variable, and j indexes a value for that variable.
Pushes the value of the polynomial onto the estack.
*/
{ if (LIST_TAG == ESTACK(i))
{ --i;
push0 ();
while (END_TAG != ESTACK(i))
{ times_top (j);
add_to_top (i);
i = next_expression_index (i);
}
}
else if (is_constant (i))
{ ER_THROW (ER_DOMAIN);
}
else
{ push_expression (j);
push_expression (i);
push_quantum (DENSE_POLY_EVAL_TAG);
}
}

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA