mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/* Shared RTM header. Emulate TSX intrinsics for compilers and assemblers
|
|
that do not support the intrinsics and instructions yet. */
|
|
#ifndef _HLE_H
|
|
#define _HLE_H 1
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
.macro XBEGIN target
|
|
.byte 0xc7,0xf8
|
|
.long \target-1f
|
|
1:
|
|
.endm
|
|
|
|
.macro XEND
|
|
.byte 0x0f,0x01,0xd5
|
|
.endm
|
|
|
|
.macro XABORT code
|
|
.byte 0xc6,0xf8,\code
|
|
.endm
|
|
|
|
.macro XTEST
|
|
.byte 0x0f,0x01,0xd6
|
|
.endm
|
|
|
|
#endif
|
|
|
|
/* Official RTM intrinsics interface matching gcc/icc, but works
|
|
on older gcc compatible compilers and binutils.
|
|
We should somehow detect if the compiler supports it, because
|
|
it may be able to generate slightly better code. */
|
|
|
|
#define _XBEGIN_STARTED (~0u)
|
|
#define _XABORT_EXPLICIT (1 << 0)
|
|
#define _XABORT_RETRY (1 << 1)
|
|
#define _XABORT_CONFLICT (1 << 2)
|
|
#define _XABORT_CAPACITY (1 << 3)
|
|
#define _XABORT_DEBUG (1 << 4)
|
|
#define _XABORT_NESTED (1 << 5)
|
|
#define _XABORT_CODE(x) (((x) >> 24) & 0xff)
|
|
|
|
#define _ABORT_LOCK_BUSY 0xff
|
|
#define _ABORT_LOCK_IS_LOCKED 0xfe
|
|
#define _ABORT_NESTED_TRYLOCK 0xfd
|
|
|
|
#ifndef __ASSEMBLER__
|
|
|
|
#define __force_inline __attribute__((__always_inline__)) inline
|
|
|
|
static __force_inline int _xbegin(void)
|
|
{
|
|
int ret = _XBEGIN_STARTED;
|
|
asm volatile (".byte 0xc7,0xf8 ; .long 0" : "+a" (ret) :: "memory");
|
|
return ret;
|
|
}
|
|
|
|
static __force_inline void _xend(void)
|
|
{
|
|
asm volatile (".byte 0x0f,0x01,0xd5" ::: "memory");
|
|
}
|
|
|
|
static __force_inline void _xabort(const unsigned int status)
|
|
{
|
|
asm volatile (".byte 0xc6,0xf8,%P0" :: "i" (status) : "memory");
|
|
}
|
|
|
|
static __force_inline int _xtest(void)
|
|
{
|
|
unsigned char out;
|
|
asm volatile (".byte 0x0f,0x01,0xd6 ; setnz %0" : "=r" (out) :: "memory");
|
|
return out;
|
|
}
|
|
|
|
#endif
|
|
#endif
|