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16 lines
676 B
C
16 lines
676 B
C
#ifndef COSMOPOLITAN_LIBC_BITS_XADD_H_
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#define COSMOPOLITAN_LIBC_BITS_XADD_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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#define _xadd(p, v) \
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({ \
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typeof(*(p)) Res; \
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autotype(Res) Val = (v); \
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asm volatile("xadd\t%0,%1" : "=r"(Res), "+m"(*(p)) : "0"(Val)); \
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Res + Val; \
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})
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_BITS_XADD_H_ */
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