mirror of https://github.com/ARMmbed/mbed-os.git
132 lines
2.3 KiB
C
132 lines
2.3 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2015-2016 Nuvoton
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef NU_BIT_UTIL_H
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#define NU_BIT_UTIL_H
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#if defined(__ICCARM__) && ( defined(__CORTEX_M0) || defined(__CORTEX_M0P) || defined(__CORTEX_M23))
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#include <arm_math.h>
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#endif
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#include "cmsis.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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__STATIC_INLINE int nu_clz(uint32_t x)
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{
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return __CLZ(x);
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}
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__STATIC_INLINE int nu_clo(uint32_t x)
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{
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return nu_clz(~x);
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}
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__STATIC_INLINE int nu_ctz(uint32_t x)
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{
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int c = __CLZ(x & -x);
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return x ? 31 - c : c;
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}
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__STATIC_INLINE int nu_cto(uint32_t x)
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{
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return nu_ctz(~x);
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}
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__STATIC_INLINE uint16_t nu_get16_le(const uint8_t *pos)
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{
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uint16_t val;
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val = *pos ++;
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val += (*pos << 8);
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return val;
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}
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__STATIC_INLINE void nu_set16_le(uint8_t *pos, uint16_t val)
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{
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*pos ++ = val & 0xFF;
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*pos = val >> 8;
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}
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__STATIC_INLINE uint32_t nu_get32_le(const uint8_t *pos)
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{
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uint32_t val;
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val = *pos ++;
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val += (*pos ++ << 8);
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val += (*pos ++ << 16);
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val += (*pos ++ << 24);
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return val;
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}
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__STATIC_INLINE void nu_set32_le(uint8_t *pos, uint32_t val)
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{
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*pos ++ = val & 0xFF;
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*pos ++ = (val >> 8) & 0xFF;
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*pos ++ = (val >> 16) & 0xFF;
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*pos = (val >> 24) & 0xFF;
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}
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__STATIC_INLINE uint16_t nu_get16_be(const uint8_t *pos)
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{
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uint16_t val;
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val = *pos ++;
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val <<= 8;
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val += *pos;
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return val;
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}
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__STATIC_INLINE void nu_set16_be(uint8_t *pos, uint16_t val)
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{
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*pos ++ = val >> 8;
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*pos = (val & 0xFF);
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}
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__STATIC_INLINE uint32_t nu_get32_be(const uint8_t *pos)
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{
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uint32_t val;
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val = *pos ++;
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val <<= 8;
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val += *pos ++;
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val <<= 8;
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val += *pos ++;
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val <<= 8;
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val += *pos;
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return val;
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}
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__STATIC_INLINE void nu_set32_be(uint8_t *pos, uint32_t val)
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{
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*pos ++ = val >> 24;
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*pos ++ = val >> 16;
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*pos ++ = val >> 8;
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*pos ++ = (val & 0xFF);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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