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