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| Rev | Author | Line No. | Line |
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| 306 | giacomo | 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 | /* 64 bit arithmetic */ |
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| 23 | |||
| 24 | #ifndef __LL_I386_64BIT__ |
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| 25 | #define __LL_I386_64BIT__ |
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| 26 | |||
| 27 | #define mul32div32to32(a,b,c,res) \ |
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| 28 | __asm__ __volatile__("mull %%ebx\n\t" \ |
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| 29 | "divl %%ecx\n\t" \ |
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| 30 | : "=a" ((res)) \ |
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| 31 | : "a" ((a)), "b" ((b)), "c" ((c)), "d" (0)) |
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| 32 | |||
| 492 | giacomo | 33 | #define smul32div32to32(a,b,c,res) \ |
| 34 | __asm__ __volatile__("imull %%ebx\n\t" \ |
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| 35 | "idivl %%ecx\n\t" \ |
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| 36 | : "=a" ((res)) \ |
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| 37 | : "a" ((a)), "b" ((b)), "c" ((c)), "d" (0)) |
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| 38 | |||
| 306 | giacomo | 39 | #endif |