1 /*****************************************************************************/
5 /* Target independent but cc65 specific utility functions */
9 /* (C) 2009-2011, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
41 /*****************************************************************************/
43 /*****************************************************************************/
47 long __fastcall__ cc65_idiv32by16r16 (long rhs, int lhs);
48 /* Divide a 32 bit signed value by a 16 bit signed value yielding a 16
49 * bit result and a 16 bit remainder. The former is returned in the lower 16
50 * bit of the result, the latter in the upper. If you don't need the
51 * remainder, just assign (or cast) to an int.
54 unsigned long __fastcall__ cc65_udiv32by16r16 (unsigned long rhs, unsigned lhs);
55 /* Divide a 32 bit unsigned value by a 16 bit unsigned value yielding a 16
56 * bit result and a 16 bit remainder. The former is returned in the lower 16
57 * bit of the result, the latter in the upper. If you don't need the
58 * remainder, just assign (or cast) to an unsigned.
61 int __fastcall__ cc65_imul8x8r16 (signed char lhs, signed char rhs);
62 /* Multiplicate two signed 8 bit to yield an signed 16 bit result */
64 long __fastcall__ cc65_imul16x16r32 (int lhs, int rhs);
65 /* Multiplicate two signed 16 bit to yield a signed 32 bit result */
67 unsigned __fastcall__ cc65_umul8x8r16 (unsigned char lhs, unsigned char rhs);
68 /* Multiplicate two unsigned 8 bit to yield an unsigned 16 bit result */
70 unsigned long __fastcall__ cc65_umul16x8r32 (unsigned lhs, unsigned char rhs);
71 /* Multiplicate an unsigned 16 bit by an unsigned 8 bit number yielding a 24
72 * bit unsigned result that is extended to 32 bits for easier handling from C.
75 unsigned long __fastcall__ cc65_umul16x16r32 (unsigned lhs, unsigned rhs);
76 /* Multiplicate two unsigned 16 bit to yield an unsigned 32 bit result */
78 int __fastcall__ cc65_sin (unsigned x);
79 /* Return the sine of the argument, which must be in range 0..360. The result
80 * is in 8.8 fixed point format, which means that 1.0 = $100 and -1.0 = $FF00.
83 int __fastcall__ cc65_cos (unsigned x);
84 /* Return the cosine of the argument, which must be in range 0..360. The result
85 * is in 8.8 fixed point format, which means that 1.0 = $100 and -1.0 = $FF00.