2014-08-29 19:56:23 +00:00
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/* KallistiGL for KallistiOS ##version##
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libgl/gl-sh4.h
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Copyright (C) 2013-2014 Josh "PH3NOM" Pearson
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Macros for utilizing the Dreamcast's SH4 CPU vector / matrix math functions.
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*/
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#ifndef GL_SH4_H
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#define GL_SH4_H
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typedef float vector3f[3]; /* 3 float vector */
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typedef float matrix4f[4][4]; /* 4x4 float matrix */
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/* DEG2RAD - convert Degrees to Radians = PI / 180.0f */
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#define DEG2RAD (0.01745329251994329576923690768489)
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/* Calculate Spot Light Angle Cosine = (PI / 180.0f) * (n / 2) */
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#define LCOS(n) fcos(n*0.00872664625997164788461845384244)
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/* Internal GL API macro */
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#define mat_trans_fv12() { \
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__asm__ __volatile__( \
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"fldi1 fr15\n" \
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"ftrv xmtrx, fv12\n" \
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"fldi1 fr14\n" \
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"fdiv fr15, fr14\n" \
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"fmul fr14, fr12\n" \
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"fmul fr14, fr13\n" \
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: "=f" (__x), "=f" (__y), "=f" (__z) \
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: "0" (__x), "1" (__y), "2" (__z) \
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: "fr15" ); \
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}
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/* Internal GL API macro */
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#define mat_trans_fv12_nodiv() { \
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__asm__ __volatile__( \
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"fldi1 fr15\n" \
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"ftrv xmtrx, fv12\n" \
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: "=f" (__x), "=f" (__y), "=f" (__z) \
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: "0" (__x), "1" (__y), "2" (__z) ); \
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}
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#define mat_trans_fv12_nodivw() { \
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__asm__ __volatile__( \
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"fldi1 fr15\n" \
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"ftrv xmtrx, fv12\n" \
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: "=f" (__x), "=f" (__y), "=f" (__z), "=f" (__w) \
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: "0" (__x), "1" (__y), "2" (__z), "3" (__w) ); \
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}
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#endif
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