1/*
2 * Written by J.T. Conklin <jtc@netbsd.org>.
3 * Changes for long double by Ulrich Drepper <drepper@cygnus.com>
4 * Changes for x86-64 by Andreas Jaeger <aj@suse.de>=09
5 * Public domain.
6 */
7
8#include <libm-alias-ldouble.h>
9#include <machine/asm.h>
10
11ENTRY(__floorl)
12 fldt 8(%rsp)
13
14 fnstenv -28(%rsp) /* store fpu environment */
15
16 /* We use here %edx although only the low 1 bits are defined.
17 But none of the operations should care and they are faster
18 than the 16 bit operations. */
19 movl $0x400,%edx /* round towards -oo */
20 orl -28(%rsp),%edx
21 andl $0xf7ff,%edx
22 movl %edx,-32(%rsp)
23 fldcw -32(%rsp) /* load modified control word */
24
25 frndint /* round */
26
27 /* Preserve "invalid" exceptions from sNaN input. */
28 fnstsw
29 andl $0x1, %eax
30 orl %eax, -24(%rsp)
31
32 fldenv -28(%rsp) /* restore original environment */
33
34 ret
35END (__floorl)
36libm_alias_ldouble (__floor, floor)
37