From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e8.ny.us.ibm.com (e8.ny.us.ibm.com [32.97.182.138]) by dpdk.org (Postfix) with ESMTP id 10DA47E7A for ; Thu, 16 Oct 2014 12:36:42 +0200 (CEST) Received: from /spool/local by e8.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 16 Oct 2014 06:44:35 -0400 Received: from d01dlp03.pok.ibm.com (9.56.250.168) by e8.ny.us.ibm.com (192.168.1.108) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Thu, 16 Oct 2014 06:44:32 -0400 Received: from b01cxnp22034.gho.pok.ibm.com (b01cxnp22034.gho.pok.ibm.com [9.57.198.24]) by d01dlp03.pok.ibm.com (Postfix) with ESMTP id AEB7EC9003E for ; Thu, 16 Oct 2014 06:33:15 -0400 (EDT) Received: from d01av05.pok.ibm.com (d01av05.pok.ibm.com [9.56.224.195]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id s9GAiNUv786754 for ; Thu, 16 Oct 2014 10:44:32 GMT Received: from d01av05.pok.ibm.com (localhost [127.0.0.1]) by d01av05.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s9GAhxhX019641 for ; Thu, 16 Oct 2014 06:43:59 -0400 Received: from d01hub02.pok.ibm.com (d01hub02.pok.ibm.com [9.63.10.236]) by d01av05.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id s9GAhxlb019293 for ; Thu, 16 Oct 2014 06:43:59 -0400 Received: from localhost.localdomain ([9.186.57.14]) by rescrl1.research.ibm.com (IBM Domino Release 9.0.1) with ESMTP id 2014101618431437-431783 ; Thu, 16 Oct 2014 18:43:14 +0800 From: Chao Zhu To: dev@dpdk.org Date: Thu, 16 Oct 2014 06:44:29 -0400 Message-Id: <1413456274-22649-3-git-send-email-bjzhuc@cn.ibm.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1413456274-22649-1-git-send-email-bjzhuc@cn.ibm.com> References: <1413456274-22649-1-git-send-email-bjzhuc@cn.ibm.com> X-MIMETrack: Itemize by SMTP Server on rescrl1/Research/Affiliated/IBM(Release 9.0.1|October 14, 2013) at 2014/10/16 18:43:14, Serialize by Router on D01HUB02/01/H/IBM(Release 8.5.3FP2 ZX853FP2HF5|February, 2013) at 10/16/2014 06:43:58, Serialize complete at 10/16/2014 06:43:58 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14101610-0029-0000-0000-000000C573D1 Subject: [dpdk-dev] [PATCH v2 2/7] Split byte order operations to architecture specific X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Oct 2014 10:36:43 -0000 This patch splits the byte order operations from DPDK and push them to architecture specific arch directories, so that other processor architecture to support DPDK can be easily adopted. Signed-off-by: Chao Zhu --- lib/librte_eal/common/Makefile | 4 +- .../common/include/arch/i686/rte_byteorder.h | 194 ++++++++++++++ .../common/include/arch/x86_64/rte_byteorder.h | 195 ++++++++++++++ .../common/include/generic/rte_byteorder.h | 124 +++++++++ lib/librte_eal/common/include/rte_byteorder.h | 270 -------------------- 5 files changed, 515 insertions(+), 272 deletions(-) create mode 100644 lib/librte_eal/common/include/arch/i686/rte_byteorder.h create mode 100644 lib/librte_eal/common/include/arch/x86_64/rte_byteorder.h create mode 100644 lib/librte_eal/common/include/generic/rte_byteorder.h delete mode 100644 lib/librte_eal/common/include/rte_byteorder.h diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile index 8ab363b..62a39cd 100644 --- a/lib/librte_eal/common/Makefile +++ b/lib/librte_eal/common/Makefile @@ -31,7 +31,7 @@ include $(RTE_SDK)/mk/rte.vars.mk -INC := rte_branch_prediction.h rte_byteorder.h rte_common.h +INC := rte_branch_prediction.h rte_common.h INC += rte_cycles.h rte_debug.h rte_eal.h rte_errno.h rte_launch.h rte_lcore.h INC += rte_log.h rte_memcpy.h rte_memory.h rte_memzone.h rte_pci.h INC += rte_pci_dev_ids.h rte_per_lcore.h rte_prefetch.h rte_random.h @@ -46,7 +46,7 @@ ifeq ($(CONFIG_RTE_INSECURE_FUNCTION_WARNING),y) INC += rte_warnings.h endif -GENERIC_INC := rte_atomic.h +GENERIC_INC := rte_atomic.h rte_byteorder.h ARCH_INC := $(GENERIC_INC) SYMLINK-$(CONFIG_RTE_LIBRTE_EAL)-include := $(addprefix include/,$(INC)) diff --git a/lib/librte_eal/common/include/arch/i686/rte_byteorder.h b/lib/librte_eal/common/include/arch/i686/rte_byteorder.h new file mode 100644 index 0000000..de5cc83 --- /dev/null +++ b/lib/librte_eal/common/include/arch/i686/rte_byteorder.h @@ -0,0 +1,194 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 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 + * are met: + * + * * 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 + * distribution. + * * 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 + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _RTE_BYTEORDER_I686_H_ +#define _RTE_BYTEORDER_I686_H_ + +/** + * @file + * + * Byte Swap Operations + * + * This file defines a architecture specific API for byte swap operations. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "generic/rte_byteorder.h" + +/* + * An architecture-optimized byte swap for a 16-bit value. + * + * Do not use this function directly. The preferred function is rte_bswap16(). + */ +static inline uint16_t rte_arch_bswap16(uint16_t _x) +{ + register uint16_t x = _x; + asm volatile ("xchgb %b[x1],%h[x2]" + : [x1] "=Q" (x) + : [x2] "0" (x) + ); + return x; +} + +/* + * An architecture-optimized byte swap for a 32-bit value. + * + * Do not use this function directly. The preferred function is rte_bswap32(). + */ +static inline uint32_t rte_arch_bswap32(uint32_t _x) +{ + register uint32_t x = _x; + asm volatile ("bswap %[x]" + : [x] "+r" (x) + ); + return x; +} + +/* + * An architecture-optimized byte swap for a 64-bit value. + * + * Do not use this function directly. The preferred function is rte_bswap64(). + */ +/* Compat./Leg. mode */ +static inline uint64_t rte_arch_bswap64(uint64_t x) +{ + uint64_t ret = 0; + ret |= ((uint64_t)rte_arch_bswap32(x & 0xffffffffUL) << 32); + ret |= ((uint64_t)rte_arch_bswap32((x >> 32) & 0xffffffffUL)); + return ret; +} + +#ifndef RTE_FORCE_INTRINSICS +/** + * Swap bytes in a 16-bit value. + */ +#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \ + rte_constant_bswap16(x) : \ + rte_arch_bswap16(x))) + +/** + * Swap bytes in a 32-bit value. + */ +#define rte_bswap32(x) ((uint32_t)(__builtin_constant_p(x) ? \ + rte_constant_bswap32(x) : \ + rte_arch_bswap32(x))) + +/** + * Swap bytes in a 64-bit value. + */ +#define rte_bswap64(x) ((uint64_t)(__builtin_constant_p(x) ? \ + rte_constant_bswap64(x) : \ + rte_arch_bswap64(x))) +#else +/** + * Swap bytes in a 16-bit value. + * __builtin_bswap16 is only available gcc 4.8 and upwards + */ +#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8) +#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \ + rte_constant_bswap16(x) : \ + rte_arch_bswap16(x))) +#endif +#endif + +/** + * Convert a 16-bit value from CPU order to little endian. + */ +#define rte_cpu_to_le_16(x) (x) + +/** + * Convert a 32-bit value from CPU order to little endian. + */ +#define rte_cpu_to_le_32(x) (x) + +/** + * Convert a 64-bit value from CPU order to little endian. + */ +#define rte_cpu_to_le_64(x) (x) + + +/** + * Convert a 16-bit value from CPU order to big endian. + */ +#define rte_cpu_to_be_16(x) rte_bswap16(x) + +/** + * Convert a 32-bit value from CPU order to big endian. + */ +#define rte_cpu_to_be_32(x) rte_bswap32(x) + +/** + * Convert a 64-bit value from CPU order to big endian. + */ +#define rte_cpu_to_be_64(x) rte_bswap64(x) + + +/** + * Convert a 16-bit value from little endian to CPU order. + */ +#define rte_le_to_cpu_16(x) (x) + +/** + * Convert a 32-bit value from little endian to CPU order. + */ +#define rte_le_to_cpu_32(x) (x) + +/** + * Convert a 64-bit value from little endian to CPU order. + */ +#define rte_le_to_cpu_64(x) (x) + + +/** + * Convert a 16-bit value from big endian to CPU order. + */ +#define rte_be_to_cpu_16(x) rte_bswap16(x) + +/** + * Convert a 32-bit value from big endian to CPU order. + */ +#define rte_be_to_cpu_32(x) rte_bswap32(x) + +/** + * Convert a 64-bit value from big endian to CPU order. + */ +#define rte_be_to_cpu_64(x) rte_bswap64(x) + +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_BYTEORDER_I686_H_ */ \ No newline at end of file diff --git a/lib/librte_eal/common/include/arch/x86_64/rte_byteorder.h b/lib/librte_eal/common/include/arch/x86_64/rte_byteorder.h new file mode 100644 index 0000000..089aeae --- /dev/null +++ b/lib/librte_eal/common/include/arch/x86_64/rte_byteorder.h @@ -0,0 +1,195 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 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 + * are met: + * + * * 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 + * distribution. + * * 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 + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _RTE_BYTEORDER_X86_64_H_ +#define _RTE_BYTEORDER_X86_64_H_ + +/** + * @file + * + * Byte Swap Operations + * + * This file defines a architecture specific API for byte swap operations. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "generic/rte_byteorder.h" + +/* + * An architecture-optimized byte swap for a 16-bit value. + * + * Do not use this function directly. The preferred function is rte_bswap16(). + */ +static inline uint16_t rte_arch_bswap16(uint16_t _x) +{ + register uint16_t x = _x; + asm volatile ("xchgb %b[x1],%h[x2]" + : [x1] "=Q" (x) + : [x2] "0" (x) + ); + return x; +} + +/* + * An architecture-optimized byte swap for a 32-bit value. + * + * Do not use this function directly. The preferred function is rte_bswap32(). + */ +static inline uint32_t rte_arch_bswap32(uint32_t _x) +{ + register uint32_t x = _x; + asm volatile ("bswap %[x]" + : [x] "+r" (x) + ); + return x; +} + +/* + * An architecture-optimized byte swap for a 64-bit value. + * + * Do not use this function directly. The preferred function is rte_bswap64(). + */ +/* 64-bit mode */ +static inline uint64_t rte_arch_bswap64(uint64_t _x) +{ + register uint64_t x = _x; + asm volatile ("bswap %[x]" + : [x] "+r" (x) + ); + return x; +} + +#ifndef RTE_FORCE_INTRINSICS +/** + * Swap bytes in a 16-bit value. + */ +#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \ + rte_constant_bswap16(x) : \ + rte_arch_bswap16(x))) + +/** + * Swap bytes in a 32-bit value. + */ +#define rte_bswap32(x) ((uint32_t)(__builtin_constant_p(x) ? \ + rte_constant_bswap32(x) : \ + rte_arch_bswap32(x))) + +/** + * Swap bytes in a 64-bit value. + */ +#define rte_bswap64(x) ((uint64_t)(__builtin_constant_p(x) ? \ + rte_constant_bswap64(x) : \ + rte_arch_bswap64(x))) +#else +/** + * Swap bytes in a 16-bit value. + * __builtin_bswap16 is only available gcc 4.8 and upwards + */ +#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8) +#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \ + rte_constant_bswap16(x) : \ + rte_arch_bswap16(x))) +#endif +#endif + +/** + * Convert a 16-bit value from CPU order to little endian. + */ +#define rte_cpu_to_le_16(x) (x) + +/** + * Convert a 32-bit value from CPU order to little endian. + */ +#define rte_cpu_to_le_32(x) (x) + +/** + * Convert a 64-bit value from CPU order to little endian. + */ +#define rte_cpu_to_le_64(x) (x) + + +/** + * Convert a 16-bit value from CPU order to big endian. + */ +#define rte_cpu_to_be_16(x) rte_bswap16(x) + +/** + * Convert a 32-bit value from CPU order to big endian. + */ +#define rte_cpu_to_be_32(x) rte_bswap32(x) + +/** + * Convert a 64-bit value from CPU order to big endian. + */ +#define rte_cpu_to_be_64(x) rte_bswap64(x) + + +/** + * Convert a 16-bit value from little endian to CPU order. + */ +#define rte_le_to_cpu_16(x) (x) + +/** + * Convert a 32-bit value from little endian to CPU order. + */ +#define rte_le_to_cpu_32(x) (x) + +/** + * Convert a 64-bit value from little endian to CPU order. + */ +#define rte_le_to_cpu_64(x) (x) + + +/** + * Convert a 16-bit value from big endian to CPU order. + */ +#define rte_be_to_cpu_16(x) rte_bswap16(x) + +/** + * Convert a 32-bit value from big endian to CPU order. + */ +#define rte_be_to_cpu_32(x) rte_bswap32(x) + +/** + * Convert a 64-bit value from big endian to CPU order. + */ +#define rte_be_to_cpu_64(x) rte_bswap64(x) + +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_BYTEORDER_X86_64_H_ */ \ No newline at end of file diff --git a/lib/librte_eal/common/include/generic/rte_byteorder.h b/lib/librte_eal/common/include/generic/rte_byteorder.h new file mode 100644 index 0000000..729d378 --- /dev/null +++ b/lib/librte_eal/common/include/generic/rte_byteorder.h @@ -0,0 +1,124 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 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 + * are met: + * + * * 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 + * distribution. + * * 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 + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _RTE_BYTEORDER_H_ +#define _RTE_BYTEORDER_H_ + +/** + * @file + * + * Byte Swap Operations + * + * This file defines a generic API for byte swap operations. Part of + * the implementation is architecture-specific. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +/* + * An internal function to swap bytes in a 16-bit value. + * + * It is used by rte_bswap16() when the value is constant. Do not use + * this function directly; rte_bswap16() is preferred. + */ +static inline uint16_t +rte_constant_bswap16(uint16_t x) +{ + return (uint16_t)(((x & 0x00ffU) << 8) | + ((x & 0xff00U) >> 8)); +} + +/* + * An internal function to swap bytes in a 32-bit value. + * + * It is used by rte_bswap32() when the value is constant. Do not use + * this function directly; rte_bswap32() is preferred. + */ +static inline uint32_t +rte_constant_bswap32(uint32_t x) +{ + return ((x & 0x000000ffUL) << 24) | + ((x & 0x0000ff00UL) << 8) | + ((x & 0x00ff0000UL) >> 8) | + ((x & 0xff000000UL) >> 24); +} + +/* + * An internal function to swap bytes of a 64-bit value. + * + * It is used by rte_bswap64() when the value is constant. Do not use + * this function directly; rte_bswap64() is preferred. + */ +static inline uint64_t +rte_constant_bswap64(uint64_t x) +{ + return ((x & 0x00000000000000ffULL) << 56) | + ((x & 0x000000000000ff00ULL) << 40) | + ((x & 0x0000000000ff0000ULL) << 24) | + ((x & 0x00000000ff000000ULL) << 8) | + ((x & 0x000000ff00000000ULL) >> 8) | + ((x & 0x0000ff0000000000ULL) >> 24) | + ((x & 0x00ff000000000000ULL) >> 40) | + ((x & 0xff00000000000000ULL) >> 56); +} + +#ifdef RTE_FORCE_INTRINSICS +/** + * Swap bytes in a 16-bit value. + * __builtin_bswap16 is only available gcc 4.8 and upwards + */ +#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8) +#define rte_bswap16(x) __builtin_bswap16(x) +#endif + +/** + * Swap bytes in a 32-bit value. + */ +#define rte_bswap32(x) __builtin_bswap32(x) + +/** + * Swap bytes in a 64-bit value. + */ +#define rte_bswap64(x) __builtin_bswap64(x) + +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_BYTEORDER_H_ */ diff --git a/lib/librte_eal/common/include/rte_byteorder.h b/lib/librte_eal/common/include/rte_byteorder.h deleted file mode 100644 index 30fbd56..0000000 --- a/lib/librte_eal/common/include/rte_byteorder.h +++ /dev/null @@ -1,270 +0,0 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 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 - * are met: - * - * * 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 - * distribution. - * * 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 - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef _RTE_BYTEORDER_H_ -#define _RTE_BYTEORDER_H_ - -/** - * @file - * - * Byte Swap Operations - * - * This file defines a generic API for byte swap operations. Part of - * the implementation is architecture-specific. - */ - -#ifdef __cplusplus -extern "C" { -#endif - -#include - -/* - * An internal function to swap bytes in a 16-bit value. - * - * It is used by rte_bswap16() when the value is constant. Do not use - * this function directly; rte_bswap16() is preferred. - */ -static inline uint16_t -rte_constant_bswap16(uint16_t x) -{ - return (uint16_t)(((x & 0x00ffU) << 8) | - ((x & 0xff00U) >> 8)); -} - -/* - * An internal function to swap bytes in a 32-bit value. - * - * It is used by rte_bswap32() when the value is constant. Do not use - * this function directly; rte_bswap32() is preferred. - */ -static inline uint32_t -rte_constant_bswap32(uint32_t x) -{ - return ((x & 0x000000ffUL) << 24) | - ((x & 0x0000ff00UL) << 8) | - ((x & 0x00ff0000UL) >> 8) | - ((x & 0xff000000UL) >> 24); -} - -/* - * An internal function to swap bytes of a 64-bit value. - * - * It is used by rte_bswap64() when the value is constant. Do not use - * this function directly; rte_bswap64() is preferred. - */ -static inline uint64_t -rte_constant_bswap64(uint64_t x) -{ - return ((x & 0x00000000000000ffULL) << 56) | - ((x & 0x000000000000ff00ULL) << 40) | - ((x & 0x0000000000ff0000ULL) << 24) | - ((x & 0x00000000ff000000ULL) << 8) | - ((x & 0x000000ff00000000ULL) >> 8) | - ((x & 0x0000ff0000000000ULL) >> 24) | - ((x & 0x00ff000000000000ULL) >> 40) | - ((x & 0xff00000000000000ULL) >> 56); -} - -/* - * An architecture-optimized byte swap for a 16-bit value. - * - * Do not use this function directly. The preferred function is rte_bswap16(). - */ -static inline uint16_t rte_arch_bswap16(uint16_t _x) -{ - register uint16_t x = _x; - asm volatile ("xchgb %b[x1],%h[x2]" - : [x1] "=Q" (x) - : [x2] "0" (x) - ); - return x; -} - -/* - * An architecture-optimized byte swap for a 32-bit value. - * - * Do not use this function directly. The preferred function is rte_bswap32(). - */ -static inline uint32_t rte_arch_bswap32(uint32_t _x) -{ - register uint32_t x = _x; - asm volatile ("bswap %[x]" - : [x] "+r" (x) - ); - return x; -} - -/* - * An architecture-optimized byte swap for a 64-bit value. - * - * Do not use this function directly. The preferred function is rte_bswap64(). - */ -#ifdef RTE_ARCH_X86_64 -/* 64-bit mode */ -static inline uint64_t rte_arch_bswap64(uint64_t _x) -{ - register uint64_t x = _x; - asm volatile ("bswap %[x]" - : [x] "+r" (x) - ); - return x; -} -#else /* ! RTE_ARCH_X86_64 */ -/* Compat./Leg. mode */ -static inline uint64_t rte_arch_bswap64(uint64_t x) -{ - uint64_t ret = 0; - ret |= ((uint64_t)rte_arch_bswap32(x & 0xffffffffUL) << 32); - ret |= ((uint64_t)rte_arch_bswap32((x >> 32) & 0xffffffffUL)); - return ret; -} -#endif /* RTE_ARCH_X86_64 */ - - -#ifndef RTE_FORCE_INTRINSICS -/** - * Swap bytes in a 16-bit value. - */ -#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \ - rte_constant_bswap16(x) : \ - rte_arch_bswap16(x))) - -/** - * Swap bytes in a 32-bit value. - */ -#define rte_bswap32(x) ((uint32_t)(__builtin_constant_p(x) ? \ - rte_constant_bswap32(x) : \ - rte_arch_bswap32(x))) - -/** - * Swap bytes in a 64-bit value. - */ -#define rte_bswap64(x) ((uint64_t)(__builtin_constant_p(x) ? \ - rte_constant_bswap64(x) : \ - rte_arch_bswap64(x))) - -#else - -/** - * Swap bytes in a 16-bit value. - * __builtin_bswap16 is only available gcc 4.8 and upwards - */ -#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8) -#define rte_bswap16(x) __builtin_bswap16(x) -#else -#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \ - rte_constant_bswap16(x) : \ - rte_arch_bswap16(x))) -#endif - -/** - * Swap bytes in a 32-bit value. - */ -#define rte_bswap32(x) __builtin_bswap32(x) - -/** - * Swap bytes in a 64-bit value. - */ -#define rte_bswap64(x) __builtin_bswap64(x) - -#endif - -/** - * Convert a 16-bit value from CPU order to little endian. - */ -#define rte_cpu_to_le_16(x) (x) - -/** - * Convert a 32-bit value from CPU order to little endian. - */ -#define rte_cpu_to_le_32(x) (x) - -/** - * Convert a 64-bit value from CPU order to little endian. - */ -#define rte_cpu_to_le_64(x) (x) - - -/** - * Convert a 16-bit value from CPU order to big endian. - */ -#define rte_cpu_to_be_16(x) rte_bswap16(x) - -/** - * Convert a 32-bit value from CPU order to big endian. - */ -#define rte_cpu_to_be_32(x) rte_bswap32(x) - -/** - * Convert a 64-bit value from CPU order to big endian. - */ -#define rte_cpu_to_be_64(x) rte_bswap64(x) - - -/** - * Convert a 16-bit value from little endian to CPU order. - */ -#define rte_le_to_cpu_16(x) (x) - -/** - * Convert a 32-bit value from little endian to CPU order. - */ -#define rte_le_to_cpu_32(x) (x) - -/** - * Convert a 64-bit value from little endian to CPU order. - */ -#define rte_le_to_cpu_64(x) (x) - - -/** - * Convert a 16-bit value from big endian to CPU order. - */ -#define rte_be_to_cpu_16(x) rte_bswap16(x) - -/** - * Convert a 32-bit value from big endian to CPU order. - */ -#define rte_be_to_cpu_32(x) rte_bswap32(x) - -/** - * Convert a 64-bit value from big endian to CPU order. - */ -#define rte_be_to_cpu_64(x) rte_bswap64(x) - -#ifdef __cplusplus -} -#endif - -#endif /* _RTE_BYTEORDER_H_ */ -- 1.7.1