mirror of https://github.com/axmolengine/axmol.git
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
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// ----------------------------------------------------------------------------
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// This confidential and proprietary software may be used only as authorised
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// by a licensing agreement from Arm Limited.
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// (C) COPYRIGHT 2011-2019 Arm Limited, ALL RIGHTS RESERVED
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// The entire notice above must be reproduced on all authorised copies and
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// copies may only be made to the extent permitted by a licensing agreement
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// from Arm Limited.
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// ----------------------------------------------------------------------------
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/**
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* @brief Soft-float library for IEEE-754.
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*/
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#ifndef SOFTFLOAT_H_INCLUDED
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#define SOFTFLOAT_H_INCLUDED
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#if defined __cplusplus
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extern "C"
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{
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#endif
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#define __STDC_LIMIT_MACROS
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#define __STDC_CONSTANT_MACROS
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#include <cstdint>
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uint32_t clz32(uint32_t p);
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/* targets that don't have UINT32_C probably don't have the rest of C99s stdint.h */
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#ifndef UINT32_C
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#define PASTE(a) a
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#define UINT64_C(a) PASTE(a##ULL)
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#define UINT32_C(a) PASTE(a##U)
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#define INT64_C(a) PASTE(a##LL)
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#define INT32_C(a) a
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#define PRIX32 "X"
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#define PRId32 "d"
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#define PRIu32 "u"
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#define PRIX64 "LX"
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#define PRId64 "Ld"
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#define PRIu64 "Lu"
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#endif
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/* sized soft-float types. These are mapped to the sized integer types of C99, instead of C's
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floating-point types; this is because the library needs to maintain exact, bit-level control on all
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operations on these data types. */
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typedef uint16_t sf16;
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typedef uint32_t sf32;
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/* the five rounding modes that IEEE-754r defines */
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typedef enum
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{
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SF_UP = 0, /* round towards positive infinity */
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SF_DOWN = 1, /* round towards negative infinity */
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SF_TOZERO = 2, /* round towards zero */
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SF_NEARESTEVEN = 3, /* round toward nearest value; if mid-between, round to even value */
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SF_NEARESTAWAY = 4 /* round toward nearest value; if mid-between, round away from zero */
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} roundmode;
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/* narrowing float->float conversions */
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sf16 sf32_to_sf16(sf32, roundmode);
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/* widening float->float conversions */
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sf32 sf16_to_sf32(sf16);
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sf16 float_to_sf16(float, roundmode);
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float sf16_to_float(sf16);
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#if defined __cplusplus
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}
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#endif
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#endif
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