/*-
* BSD LICENSE
*
- * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+ * Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
* All rights reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
* are met:
*
- * * Redistributions of source code must retain the above copyright
+ * * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
* distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
*/
#ifndef _RTE_COMMON_H_
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
+#include <emmintrin.h>
/*********** Macros to eliminate unused variable warnings ********/
* point to an address no higher than the first parameter. Second parameter
* must be a power-of-two value.
*/
-#define RTE_ALIGN_FLOOR(ptr, align) \
+#define RTE_PTR_ALIGN_FLOOR(ptr, align) \
(typeof(ptr))rte_align_floor_int((uintptr_t)ptr, align)
+/**
+ * Macro to align a value to a given power-of-two. The resultant value
+ * will be of the same type as the first parameter, and will be no
+ * bigger than the first parameter. Second parameter must be a
+ * power-of-two value.
+ */
+#define RTE_ALIGN_FLOOR(val, align) \
+ (typeof(val))((val) & (~((typeof(val))((align) - 1))))
+
/**
* Macro to align a pointer to a given power-of-two. The resultant
* pointer will be a pointer of the same type as the first parameter, and
* point to an address no lower than the first parameter. Second parameter
* must be a power-of-two value.
*/
-#define RTE_ALIGN_CEIL(ptr, align) \
- RTE_ALIGN_FLOOR(RTE_PTR_ADD(ptr, align - 1), align)
+#define RTE_PTR_ALIGN_CEIL(ptr, align) \
+ RTE_PTR_ALIGN_FLOOR(RTE_PTR_ADD(ptr, (align) - 1), align)
+
+/**
+ * Macro to align a value to a given power-of-two. The resultant value
+ * will be of the same type as the first parameter, and will be no lower
+ * than the first parameter. Second parameter must be a power-of-two
+ * value.
+ */
+#define RTE_ALIGN_CEIL(val, align) \
+ RTE_ALIGN_FLOOR(((val) + ((typeof(val)) (align) - 1)), align)
/**
* Macro to align a pointer to a given power-of-two. The resultant
* pointer will be a pointer of the same type as the first parameter, and
* point to an address no lower than the first parameter. Second parameter
* must be a power-of-two value.
+ * This function is the same as RTE_PTR_ALIGN_CEIL
+ */
+#define RTE_PTR_ALIGN(ptr, align) RTE_PTR_ALIGN_CEIL(ptr, align)
+
+/**
+ * Macro to align a value to a given power-of-two. The resultant
+ * value will be of the same type as the first parameter, and
+ * will be no lower than the first parameter. Second parameter
+ * must be a power-of-two value.
* This function is the same as RTE_ALIGN_CEIL
*/
-#define RTE_ALIGN(ptr, align) RTE_ALIGN_CEIL(ptr, align)
+#define RTE_ALIGN(val, align) RTE_ALIGN_CEIL(val, align)
/**
* Checks if a pointer is aligned to a given power-of-two value
static inline int
rte_is_aligned(void *ptr, unsigned align)
{
- return RTE_ALIGN(ptr, align) == ptr;
+ return RTE_PTR_ALIGN(ptr, align) == ptr;
}
/*********** Macros for compile type checks ********/
static inline void
rte_pause (void)
{
- asm volatile ("pause");
+ _mm_pause();
+}
+
+/**
+ * Searches the input parameter for the least significant set bit
+ * (starting from zero).
+ * If a least significant 1 bit is found, its bit index is returned.
+ * If the content of the input parameter is zero, then the content of the return
+ * value is undefined.
+ * @param v
+ * input parameter, should not be zero.
+ * @return
+ * least significant set bit in the input parameter.
+ */
+static inline uint32_t
+rte_bsf32(uint32_t v)
+{
+ return (__builtin_ctz(v));
}
#ifndef offsetof
* This function never returns
*
* @param exit_code
- * The exit code to be returned by the application
+ * The exit code to be returned by the application
* @param format
- * The format string to be used for printing the message. This can include
- * printf format characters which will be expanded using any further parameters
- * to the function.
+ * The format string to be used for printing the message. This can include
+ * printf format characters which will be expanded using any further parameters
+ * to the function.
*/
void
rte_exit(int exit_code, const char *format, ...)
git.droids-corp.org / dpdk.git / blobdiff