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Moved fixed point multiplication and rounding into an asm module.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4447 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz
2009-11-05 20:16:43 +00:00
parent de6050f21d
commit 787f069738
6 changed files with 75 additions and 17 deletions
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7
include/tgi/tgi-kernel.h
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@@ -44,7 +44,7 @@
/* TGI kernel variables */
/* TGI kernel variables */
extern void* tgi_drv; /* Pointer to driver */
extern unsigned char tgi_error; /* Last error code */
extern unsigned char tgi_gmode; /* Flag: Graphics mode active */
@@ -68,6 +68,11 @@ extern unsigned tgi_aspectratio;/* Aspect ratio as fixed point 8.8 */
const char* __fastcall__ tgi_map_mode (unsigned char mode);
/* Map a tgi mode to a driver name. Returns NULL if no driver available. */
int __fastcall__ tgi_imulround (int rhs, int lhs);
/* Helper function for functions using sine/cosine: Multiply two values, one
* being an 8.8 fixed point one, and return the rounded and scaled result.
*/
/* End of tgi-kernel.h */