1 | /* |
2 | * Public domain. |
3 | */ |
4 | |
5 | #include <libm-alias-ldouble.h> |
6 | #include <machine/asm.h> |
7 | |
8 | RCSID("$NetBSD: $" ) |
9 | |
10 | ENTRY(__floorl) |
11 | fldt 4(%esp) |
12 | subl $32,%esp |
13 | cfi_adjust_cfa_offset (32) |
14 | |
15 | fnstenv 4(%esp) /* store fpu environment */ |
16 | |
17 | /* We use here %edx although only the low 1 bits are defined. |
18 | But none of the operations should care and they are faster |
19 | than the 16 bit operations. */ |
20 | movl $0x400,%edx /* round towards -oo */ |
21 | orl 4(%esp),%edx |
22 | andl $0xf7ff,%edx |
23 | movl %edx,(%esp) |
24 | fldcw (%esp) /* load modified control word */ |
25 | |
26 | frndint /* round */ |
27 | |
28 | /* Preserve "invalid" exceptions from sNaN input. */ |
29 | fnstsw |
30 | andl $0x1, %eax |
31 | orl %eax, 8(%esp) |
32 | |
33 | fldenv 4(%esp) /* restore original environment */ |
34 | |
35 | addl $32,%esp |
36 | cfi_adjust_cfa_offset (-32) |
37 | ret |
38 | END (__floorl) |
39 | libm_alias_ldouble (__floor, floor) |
40 | |