Restore the nontemporal pagezero() under the name sse2_pagezero() (the
same name as for i386). It is not reconnected yet. Which method is better is too machine-dependent and system-dependent to replace the old method unconditionally.
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537a47a1ba
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=304986
@ -72,6 +72,24 @@ ENTRY(pagezero)
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ret
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END(pagezero)
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/* Address: %rdi */
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ENTRY(sse2_pagezero)
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PUSH_FRAME_POINTER
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movq $-PAGE_SIZE,%rdx
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subq %rdx,%rdi
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xorl %eax,%eax
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1:
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movnti %rax,(%rdi,%rdx)
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movnti %rax,8(%rdi,%rdx)
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movnti %rax,16(%rdi,%rdx)
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movnti %rax,24(%rdi,%rdx)
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addq $32,%rdx
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jne 1b
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sfence
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POP_FRAME_POINTER
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ret
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END(pagezero)
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ENTRY(bcmp)
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PUSH_FRAME_POINTER
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movq %rdx,%rcx
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