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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | /* Assembler portion of the library: |
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| 23 | function: modf! */ |
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| 24 | |||
| 25 | #include <ll/i386/linkage.h> |
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| 26 | |||
| 27 | .text |
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| 28 | .globl SYMBOL_NAME(modf) |
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| 29 | |||
| 30 | SYMBOL_NAME_LABEL(modf) |
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| 31 | pushl %ebp |
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| 32 | movl %esp,%ebp |
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| 33 | subl $16,%esp |
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| 34 | pushl %ebx |
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| 35 | fnstcw -4(%ebp) |
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| 36 | fwait |
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| 37 | movw -4(%ebp),%ax |
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| 38 | orw $0x0c3f,%ax |
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| 39 | movw %ax,-8(%ebp) |
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| 40 | fldcw -8(%ebp) |
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| 41 | fwait |
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| 42 | fldl 8(%ebp) |
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| 43 | frndint |
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| 44 | fstpl -16(%ebp) |
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| 45 | fwait |
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| 46 | movl -16(%ebp),%edx |
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| 47 | movl -12(%ebp),%ecx |
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| 48 | movl 16(%ebp),%ebx |
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| 49 | movl %edx,(%ebx) |
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| 50 | movl %ecx,4(%ebx) |
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| 51 | fldl 8(%ebp) |
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| 52 | fsubl -16(%ebp) |
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| 53 | leal -20(%ebp),%esp |
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| 54 | fclex |
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| 55 | fldcw -4(%ebp) |
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| 56 | fwait |
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| 57 | popl %ebx |
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| 58 | leave |
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| 59 | ret |