2003-11-13 16:41:19 +00:00
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/*
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* Written by J.T. Conklin <jtc@netbsd.org>.
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* Changes for long double by Ulrich Drepper <drepper@cygnus.com>
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2013-06-05 20:44:03 +00:00
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* Changes for x86-64 by Andreas Jaeger <aj@suse.de>
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2003-11-13 16:41:19 +00:00
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* Public domain.
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*/
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#include <machine/asm.h>
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ENTRY(__ceill)
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fldt 8(%rsp)
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fstcw -4(%rsp) /* store fpu control word */
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/* We use here %edx although only the low 1 bits are defined.
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But none of the operations should care and they are faster
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than the 16 bit operations. */
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movl $0x0800,%edx /* round towards +oo */
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orl -4(%rsp),%edx
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andl $0xfbff,%edx
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movl %edx,-8(%rsp)
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fldcw -8(%rsp) /* load modified control word */
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frndint /* round */
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fldcw -4(%rsp) /* restore original control word */
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ret
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END (__ceill)
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weak_alias (__ceill, ceill)
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