1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
#ifndef _RTE_RTM_H_
#define _RTE_RTM_H_ 1
/*
* Copyright (c) 2012,2013 Intel Corporation
* Author: Andi Kleen
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* Official RTM intrinsics interface matching gcc/icc, but works
on older gcc compatible compilers and binutils. */
#include <rte_common.h>
#ifdef __cplusplus
extern "C" {
#endif
#define RTE_XBEGIN_STARTED (~0u)
#define RTE_XABORT_EXPLICIT (1 << 0)
#define RTE_XABORT_RETRY (1 << 1)
#define RTE_XABORT_CONFLICT (1 << 2)
#define RTE_XABORT_CAPACITY (1 << 3)
#define RTE_XABORT_DEBUG (1 << 4)
#define RTE_XABORT_NESTED (1 << 5)
#define RTE_XABORT_CODE(x) (((x) >> 24) & 0xff)
static __attribute__((__always_inline__)) inline
unsigned int rte_xbegin(void)
{
unsigned int ret = RTE_XBEGIN_STARTED;
asm volatile(".byte 0xc7,0xf8 ; .long 0" : "+a" (ret) :: "memory");
return ret;
}
static __attribute__((__always_inline__)) inline
void rte_xend(void)
{
asm volatile(".byte 0x0f,0x01,0xd5" ::: "memory");
}
/* not an inline function to workaround a clang bug with -O0 */
#define rte_xabort(status) do { \
asm volatile(".byte 0xc6,0xf8,%P0" :: "i" (status) : "memory"); \
} while (0)
static __attribute__((__always_inline__)) inline
int rte_xtest(void)
{
unsigned char out;
asm volatile(".byte 0x0f,0x01,0xd6 ; setnz %0" :
"=r" (out) :: "memory");
return out;
}
#ifdef __cplusplus
}
#endif
#endif /* _RTE_RTM_H_ */
|
