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Fixed the return types of the sine/cosine functions. Added comments.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4402 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz
2009-10-30 14:02:24 +00:00
parent 4d93094936
commit 4e4beef8b7
2 changed files with 5 additions and 2 deletions
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4
include/cc65.h
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@@ -44,12 +44,12 @@
extern unsigned __fastcall__ cc65_sin (unsigned x); extern int __fastcall__ cc65_sin (unsigned x);
/* Return the sine of the argument, which must be in range 0..360. The result /* Return the sine of the argument, which must be in range 0..360. The result
* is in 8.8 fixed point format, which means that 1.0 = $100 and -1.0 = $FF00. * is in 8.8 fixed point format, which means that 1.0 = $100 and -1.0 = $FF00.
*/ */
extern unsigned __fastcall__ cc65_cos (unsigned x); extern int __fastcall__ cc65_cos (unsigned x);
/* Return the cosine of the argument, which must be in range 0..360. The result /* Return the cosine of the argument, which must be in range 0..360. The result
* is in 8.8 fixed point format, which means that 1.0 = $100 and -1.0 = $FF00. * is in 8.8 fixed point format, which means that 1.0 = $100 and -1.0 = $FF00.
*/ */

3
libsrc/common/cc65_sincos.s
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@@ -1,6 +1,9 @@
; ;
; Fixed point cosine/sine functions. ; Fixed point cosine/sine functions.
; ;
; int __fastcall__ cc65_sin (unsigned x);
; int __fastcall__ cc65_cos (unsigned x);
;
; Returns the cosine/sine for the given argument as angular degree. ; Returns the cosine/sine for the given argument as angular degree.
; Valid argument range is 0..360 for both functions. They will return ; Valid argument range is 0..360 for both functions. They will return
; garbage if the argument is not in a valid range. Result is in 8.8 fixed ; garbage if the argument is not in a valid range. Result is in 8.8 fixed