85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* only include from header */
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#ifndef __BLI_ENDIAN_SWITCH_H__
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# error "this file isn't to be directly included"
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#endif
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/** \file
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* \ingroup bli
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*/
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/* NOTE: using a temp char to switch endian is a lot slower,
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* use bit shifting instead. */
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/* *** 16 *** */
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BLI_INLINE void BLI_endian_switch_int16(short *val)
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{
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BLI_endian_switch_uint16((unsigned short *)val);
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}
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BLI_INLINE void BLI_endian_switch_uint16(unsigned short *val)
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{
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#ifdef __GNUC__
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*val = __builtin_bswap16(*val);
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#else
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unsigned short tval = *val;
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*val = (tval >> 8) | (tval << 8);
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#endif
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}
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/* *** 32 *** */
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BLI_INLINE void BLI_endian_switch_int32(int *val)
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{
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BLI_endian_switch_uint32((unsigned int *)val);
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}
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BLI_INLINE void BLI_endian_switch_uint32(unsigned int *val)
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{
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#ifdef __GNUC__
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*val = __builtin_bswap32(*val);
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#else
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unsigned int tval = *val;
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*val = ((tval >> 24)) | ((tval << 8) & 0x00ff0000) | ((tval >> 8) & 0x0000ff00) | ((tval << 24));
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#endif
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}
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BLI_INLINE void BLI_endian_switch_float(float *val)
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{
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BLI_endian_switch_uint32((unsigned int *)val);
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}
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/* *** 64 *** */
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BLI_INLINE void BLI_endian_switch_int64(int64_t *val)
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{
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BLI_endian_switch_uint64((uint64_t *)val);
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}
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BLI_INLINE void BLI_endian_switch_uint64(uint64_t *val)
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{
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#ifdef __GNUC__
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*val = __builtin_bswap64(*val);
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#else
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uint64_t tval = *val;
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*val = ((tval >> 56)) | ((tval << 40) & 0x00ff000000000000ll) |
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((tval << 24) & 0x0000ff0000000000ll) | ((tval << 8) & 0x000000ff00000000ll) |
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((tval >> 8) & 0x00000000ff000000ll) | ((tval >> 24) & 0x0000000000ff0000ll) |
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((tval >> 40) & 0x000000000000ff00ll) | ((tval << 56));
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#endif
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}
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BLI_INLINE void BLI_endian_switch_double(double *val)
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{
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BLI_endian_switch_uint64((uint64_t *)val);
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}
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#ifdef __cplusplus
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}
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#endif
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