mirror of https://github.com/zeldaret/tp.git
49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
#ifndef MSL_COMMON_SRC_FLOAT_H
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#define MSL_COMMON_SRC_FLOAT_H
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#include "dolphin/types.h"
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#define FP_SNAN 0
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#define FP_QNAN 1
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#define FP_INFINITE 2
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#define FP_ZERO 3
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#define FP_NORMAL 4
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#define FP_SUBNORMAL 5
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#define FP_NAN FP_QNAN
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#define fpclassify(x) ((sizeof(x) == sizeof(float)) ? __fpclassifyf(x) : __fpclassifyd(x))
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#define signbit(x) ((sizeof(x) == sizeof(float)) ? __signbitf(x) : __signbitd(x))
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#define __signbitf(x) ((*(u8*)&(x)) & 0x80)
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// TODO: OK?
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#define __signbitd(x) ((*(u8*)&(x)) & 0x80)
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inline int __fpclassifyf(float __value) {
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u32 integer = *(u32*)&__value;
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switch (integer & 0x7f800000) {
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case 0x7f800000:
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if ((integer & 0x7fffff) != 0) {
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return FP_QNAN;
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}
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return FP_INFINITE;
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case 0:
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if ((integer & 0x7fffff) != 0) {
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return FP_SUBNORMAL;
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}
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return FP_ZERO;
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}
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return FP_NORMAL;
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}
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inline int __fpclassifyd(double __value) {
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// TODO:
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return FP_INFINITE;
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}
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#endif /* MSL_COMMON_SRC_FLOAT_H */
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