Imported Upstream version 16.04

[deb_dpdk.git] / examples / performance-thread / common / arch / x86 / ctx.c

diff --git a/examples/performance-thread/common/arch/x86/ctx.c b/examples/performance-thread/common/arch/x86/ctx.c
new file mode 100644 (file)
index 0000000..1e8e271
--- /dev/null
+++ b/examples/performance-thread/common/arch/x86/ctx.c
@@ -0,0 +1,93 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015  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.
+ */
+
+/*
+ * https://github.com/halayli/lthread which carries the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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.
+ */
+
+
+
+#if defined(__x86_64__)
+__asm__ (
+".text\n"
+".p2align 4,,15\n"
+".globl ctx_switch\n"
+".globl _ctx_switch\n"
+"ctx_switch:\n"
+"_ctx_switch:\n"
+"      movq %rsp, 0(%rsi)      # save stack_pointer\n"
+"      movq %rbp, 8(%rsi)      # save frame_pointer\n"
+"      movq (%rsp), %rax       # save insn_pointer\n"
+"      movq %rax, 16(%rsi)\n"
+"      movq %rbx, 24(%rsi)\n   # save rbx,r12-r15\n"
+"      movq 24(%rdi), %rbx\n"
+"      movq %r15, 56(%rsi)\n"
+"      movq %r14, 48(%rsi)\n"
+"      movq 48(%rdi), %r14\n"
+"      movq 56(%rdi), %r15\n"
+"      movq %r13, 40(%rsi)\n"
+"      movq %r12, 32(%rsi)\n"
+"      movq 32(%rdi), %r12\n"
+"      movq 40(%rdi), %r13\n"
+"      movq 0(%rdi), %rsp      # restore stack_pointer\n"
+"      movq 16(%rdi), %rax     # restore insn_pointer\n"
+"      movq 8(%rdi), %rbp      # restore frame_pointer\n"
+"      movq %rax, (%rsp)\n"
+"      ret\n"
+       );
+#else
+#pragma GCC error "__x86_64__ is not defined"
+#endif