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