1 | /* Shared RTM header. Emulate TSX intrinsics for compilers and assemblers |
2 | that do not support the intrinsics and instructions yet. */ |
3 | #ifndef _HLE_H |
4 | #define _HLE_H 1 |
5 | |
6 | #ifdef __ASSEMBLER__ |
7 | |
8 | .macro XBEGIN target |
9 | .byte 0xc7,0xf8 |
10 | .long \target-1f |
11 | 1: |
12 | .endm |
13 | |
14 | .macro XEND |
15 | .byte 0x0f,0x01,0xd5 |
16 | .endm |
17 | |
18 | .macro XABORT code |
19 | .byte 0xc6,0xf8,\code |
20 | .endm |
21 | |
22 | .macro XTEST |
23 | .byte 0x0f,0x01,0xd6 |
24 | .endm |
25 | |
26 | #endif |
27 | |
28 | /* Official RTM intrinsics interface matching gcc/icc, but works |
29 | on older gcc compatible compilers and binutils. |
30 | We should somehow detect if the compiler supports it, because |
31 | it may be able to generate slightly better code. */ |
32 | |
33 | #define _XBEGIN_STARTED (~0u) |
34 | #define _XABORT_EXPLICIT (1 << 0) |
35 | #define _XABORT_RETRY (1 << 1) |
36 | #define _XABORT_CONFLICT (1 << 2) |
37 | #define _XABORT_CAPACITY (1 << 3) |
38 | #define _XABORT_DEBUG (1 << 4) |
39 | #define _XABORT_NESTED (1 << 5) |
40 | #define _XABORT_CODE(x) (((x) >> 24) & 0xff) |
41 | |
42 | #define _ABORT_LOCK_BUSY 0xff |
43 | #define _ABORT_LOCK_IS_LOCKED 0xfe |
44 | #define _ABORT_NESTED_TRYLOCK 0xfd |
45 | |
46 | #ifndef __ASSEMBLER__ |
47 | |
48 | #define __force_inline __attribute__((__always_inline__)) inline |
49 | |
50 | static __force_inline int _xbegin(void) |
51 | { |
52 | int ret = _XBEGIN_STARTED; |
53 | asm volatile (".byte 0xc7,0xf8 ; .long 0" : "+a" (ret) :: "memory" ); |
54 | return ret; |
55 | } |
56 | |
57 | static __force_inline void _xend(void) |
58 | { |
59 | asm volatile (".byte 0x0f,0x01,0xd5" ::: "memory" ); |
60 | } |
61 | |
62 | static __force_inline void _xabort(const unsigned int status) |
63 | { |
64 | asm volatile (".byte 0xc6,0xf8,%P0" :: "i" (status) : "memory" ); |
65 | } |
66 | |
67 | static __force_inline int _xtest(void) |
68 | { |
69 | unsigned char out; |
70 | asm volatile (".byte 0x0f,0x01,0xd6 ; setnz %0" : "=r" (out) :: "memory" ); |
71 | return out; |
72 | } |
73 | |
74 | #endif |
75 | #endif |
76 | |