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42 lines
808 B
C
42 lines
808 B
C
#ifndef _SQRT_H
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#define _SQRT_H
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#include "types.h"
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#define FRSQRTE(input, output) \
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{ \
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register f32 __frsqrte_v = input; \
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asm { frsqrte __frsqrte_v, __frsqrte_v } \
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*output = __frsqrte_v; \
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}
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inline f32 sqrtf(f32& __sqrtf_g)
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{
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if ((__sqrtf_g > 0.0f)) {
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f32 __sqrtf_h;
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FRSQRTE(__sqrtf_g, &__sqrtf_h);
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__sqrtf_g = __sqrtf_h * __sqrtf_g;
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}
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return __sqrtf_g;
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}
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inline f32 _sqrtf(f32 x) { return (x > 0.0f) ? sqrtf(x) : 0.0f; }
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// used in pelplant's Obj::getShadowParam(ShadowParam&)
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inline void __sqrtf(register f32 x, f32* val)
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{
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if (x > 0.0f) {
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if (x > 0.0f) {
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register f32 reg_f0;
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asm {
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frsqrte reg_f0, x
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}
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*val = reg_f0 * x;
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}
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} else {
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*val = 0.0f;
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}
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}
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#endif
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