Texas Instruments TI-89 Developer's Guide

Appendix A: System Routines — EStack Arithmetic
513
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
times_top
Declaration:
void
times_top
(EStackIndex
i
)
Category(ies):
EStack Arithmetic
Description:
Replaces the top expression on the estack with the internally-simplified
product of the top times the expression indexed by
i
. If both operands are
conforming matrices, the matrix product rather than an element-wise
product is computed.
Inputs:
i
— Index of the top tag of an internally-simplified algebraic expression,
algebraic comparison, or aggregate thereof.
Outputs:
None
Assumptions:
i
and
top_estack
index the top tags of an internally-simplified algebraic
expressions, algebraic comparisons, or aggregates thereof.
Side Effects:
None
Availability:
On AMS 2.02 and higher.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: push_product, replace_top2_with_prod, push_negate, negate_top
Example:
void push_r_cis (EStackIndex r, EStackIndex t)
/* r and t index real expressions.
Pushes r cos(t) + #i r sin(t) onto the estack.
*/
{ Access_AMS_Global_Variables;
EStackIndex k;
push_cos (t);
times_top (r);
k = top_estack;
push_sin (t);
times_top (r);
replace_top2_with_imre (k);
}

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