helpGNU Common Lisp - Support: sr #103228, change algorithm for arithmetic...


sr #103228: change algorithm for arithmetic operations between t_complex and real or integer

Submitted by:  None
Submitted on:  Tue 27 Jul 2004 05:18:19 PM UTC  
Category: NonePriority: 5 - Normal
Severity: 1 - WishStatus: None
Privacy: PublicAssigned to: None
Originator Email: -unavailable-Open/Closed: Open
Operating System: None

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Tue 27 Jul 2004 05:18:19 PM UTC, original submission:

The actual code 'complexifies' real or 'integer' numbers instead of directly computing.

real(x) * complex(y) =>

x = number_to_complex(x);
y = number_to_complex(y);
z11 = number_times(x->cmp.cmp_real, y->cmp.cmp_real);
z12 = number_times(x->cmp.cmp_imag, y->cmp.cmp_imag);
z21 = number_times(x->cmp.cmp_imag, y->cmp.cmp_real);
z22 = number_times(x->cmp.cmp_real, y->cmp.cmp_imag);
z1 = number_minus(z11, z12);
z2 = number_plus(z21, z22);
vz = make_complex(z1, z2);

Is it possible to use ? =>

z1 = number_times(x, y->cmp.cmp_real);
z2 = number_times(x, y->cmp.cmp_imag);
vz = make_complex(z1, );



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