DPDK  19.11.14-rc1
examples/performance-thread/common/arch/arm64/ctx.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2017 Cavium, Inc
*/
#include <rte_common.h>
#include <ctx.h>
void
ctx_switch(struct ctx *new_ctx __rte_unused, struct ctx *curr_ctx __rte_unused)
{
/* SAVE CURRENT CONTEXT */
asm volatile (
/* Save SP */
"mov x3, sp\n"
"str x3, [x1, #0]\n"
/* Save FP and LR */
"stp x29, x30, [x1, #8]\n"
/* Save Callee Saved Regs x19 - x28 */
"stp x19, x20, [x1, #24]\n"
"stp x21, x22, [x1, #40]\n"
"stp x23, x24, [x1, #56]\n"
"stp x25, x26, [x1, #72]\n"
"stp x27, x28, [x1, #88]\n"
/*
* Save bottom 64-bits of Callee Saved
* SIMD Regs v8 - v15
*/
"stp d8, d9, [x1, #104]\n"
"stp d10, d11, [x1, #120]\n"
"stp d12, d13, [x1, #136]\n"
"stp d14, d15, [x1, #152]\n"
);
/* RESTORE NEW CONTEXT */
asm volatile (
/* Restore SP */
"ldr x3, [x0, #0]\n"
"mov sp, x3\n"
/* Restore FP and LR */
"ldp x29, x30, [x0, #8]\n"
/* Restore Callee Saved Regs x19 - x28 */
"ldp x19, x20, [x0, #24]\n"
"ldp x21, x22, [x0, #40]\n"
"ldp x23, x24, [x0, #56]\n"
"ldp x25, x26, [x0, #72]\n"
"ldp x27, x28, [x0, #88]\n"
/*
* Restore bottom 64-bits of Callee Saved
* SIMD Regs v8 - v15
*/
"ldp d8, d9, [x0, #104]\n"
"ldp d10, d11, [x0, #120]\n"
"ldp d12, d13, [x0, #136]\n"
"ldp d14, d15, [x0, #152]\n"
);
}