| /* |
| * Written by J.T. Conklin <jtc@netbsd.org>. |
| * Changes for long double by Ulrich Drepper <drepper@cygnus.com> |
| * Changes for x86-64 by Andreas Jaeger <aj@suse.de>=09 |
| * Public domain. |
| */ |
| |
| #include <libm-alias-ldouble.h> |
| #include <machine/asm.h> |
| |
| ENTRY(__floorl) |
| fldt 8(%rsp) |
| |
| fnstenv -28(%rsp) /* store fpu environment */ |
| |
| /* We use here %edx although only the low 1 bits are defined. |
| But none of the operations should care and they are faster |
| than the 16 bit operations. */ |
| movl $0x400,%edx /* round towards -oo */ |
| orl -28(%rsp),%edx |
| andl $0xf7ff,%edx |
| movl %edx,-32(%rsp) |
| fldcw -32(%rsp) /* load modified control word */ |
| |
| frndint /* round */ |
| |
| /* Preserve "invalid" exceptions from sNaN input. */ |
| fnstsw |
| andl $0x1, %eax |
| orl %eax, -24(%rsp) |
| |
| fldenv -28(%rsp) /* restore original environment */ |
| |
| ret |
| END (__floorl) |
| libm_alias_ldouble (__floor, floor) |
