| 1 | /* |
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| 2 | * Public domain. |
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| 3 | */ |
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| 4 | |
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| 5 | #include <libm-alias-ldouble.h> |
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| 6 | #include <machine/asm.h> |
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| 7 | |
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| 8 | |
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| 9 | ENTRY(__ceill) |
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| 10 | fldt 8(%rsp) |
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| 11 | |
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| 12 | fnstenv -28(%rsp) /* store fpu environment */ |
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| 13 | |
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| 14 | /* We use here %edx although only the low 1 bits are defined. |
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| 15 | But none of the operations should care and they are faster |
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| 16 | than the 16 bit operations. */ |
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| 17 | movl $0x0800,%edx /* round towards +oo */ |
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| 18 | orl -28(%rsp),%edx |
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| 19 | andl $0xfbff,%edx |
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| 20 | movl %edx,-32(%rsp) |
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| 21 | fldcw -32(%rsp) /* load modified control word */ |
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| 22 | |
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| 23 | frndint /* round */ |
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| 24 | |
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| 25 | /* Preserve "invalid" exceptions from sNaN input. */ |
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| 26 | fnstsw |
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| 27 | andl $0x1, %eax |
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| 28 | orl %eax, -24(%rsp) |
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| 29 | |
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| 30 | fldenv -28(%rsp) /* restore original environment */ |
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| 31 | |
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| 32 | ret |
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| 33 | END (__ceill) |
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| 34 | libm_alias_ldouble (__ceil, ceil) |
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| 35 | |
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