99a2dd955f
There is no reason for the DPDK libraries to all have 'librte_' prefix on the directory names. This prefix makes the directory names longer and also makes it awkward to add features referring to individual libraries in the build - should the lib names be specified with or without the prefix. Therefore, we can just remove the library prefix and use the library's unique name as the directory name, i.e. 'eal' rather than 'librte_eal' Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
96 lines
1.5 KiB
C
96 lines
1.5 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#ifndef __INCLUDE_RTE_SCHED_COMMON_H__
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#define __INCLUDE_RTE_SCHED_COMMON_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <sys/types.h>
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#define __rte_aligned_16 __rte_aligned(16)
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#if 0
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static inline uint32_t
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rte_min_pos_4_u16(uint16_t *x)
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{
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uint32_t pos0, pos1;
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pos0 = (x[0] <= x[1])? 0 : 1;
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pos1 = (x[2] <= x[3])? 2 : 3;
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return (x[pos0] <= x[pos1])? pos0 : pos1;
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}
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#else
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/* simplified version to remove branches with CMOV instruction */
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static inline uint32_t
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rte_min_pos_4_u16(uint16_t *x)
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{
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uint32_t pos0 = 0;
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uint32_t pos1 = 2;
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if (x[1] <= x[0]) pos0 = 1;
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if (x[3] <= x[2]) pos1 = 3;
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if (x[pos1] <= x[pos0]) pos0 = pos1;
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return pos0;
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}
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#endif
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/*
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* Compute the Greatest Common Divisor (GCD) of two numbers.
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* This implementation uses Euclid's algorithm:
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* gcd(a, 0) = a
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* gcd(a, b) = gcd(b, a mod b)
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*
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*/
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static inline uint32_t
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rte_get_gcd(uint32_t a, uint32_t b)
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{
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uint32_t c;
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if (a == 0)
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return b;
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if (b == 0)
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return a;
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if (a < b) {
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c = a;
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a = b;
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b = c;
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}
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while (b != 0) {
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c = a % b;
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a = b;
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b = c;
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}
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return a;
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}
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/*
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* Compute the Lowest Common Denominator (LCD) of two numbers.
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* This implementation computes GCD first:
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* LCD(a, b) = (a * b) / GCD(a, b)
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*
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*/
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static inline uint32_t
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rte_get_lcd(uint32_t a, uint32_t b)
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{
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return (a * b) / rte_get_gcd(a, b);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCLUDE_RTE_SCHED_COMMON_H__ */
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