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author | Sebastian Schmelzer | 2010-10-25 16:53:54 +0200 |
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committer | Sebastian Schmelzer | 2010-10-25 16:53:54 +0200 |
commit | 3050a9253437f4a4b5ad4bf3b3efdc3c660a5137 (patch) | |
tree | 91ac22153e416aac7ca20916b314b5e2ffa871b1 /contrib/syslinux-4.02/dos/__udivmoddi4.c | |
download | preboot-3050a9253437f4a4b5ad4bf3b3efdc3c660a5137.tar.gz preboot-3050a9253437f4a4b5ad4bf3b3efdc3c660a5137.tar.xz preboot-3050a9253437f4a4b5ad4bf3b3efdc3c660a5137.zip |
Diffstat (limited to 'contrib/syslinux-4.02/dos/__udivmoddi4.c')
-rw-r--r-- | contrib/syslinux-4.02/dos/__udivmoddi4.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/dos/__udivmoddi4.c b/contrib/syslinux-4.02/dos/__udivmoddi4.c new file mode 100644 index 0000000..ca476b7 --- /dev/null +++ b/contrib/syslinux-4.02/dos/__udivmoddi4.c @@ -0,0 +1,31 @@ +#include <stdint.h> + +uint64_t __udivmoddi4(uint64_t num, uint64_t den, uint64_t * rem_p) +{ + uint64_t quot = 0, qbit = 1; + + if (den == 0) { + asm volatile ("int $0"); + return 0; /* If trap returns... */ + } + + /* Left-justify denominator and count shift */ + while ((int64_t) den >= 0) { + den <<= 1; + qbit <<= 1; + } + + while (qbit) { + if (den <= num) { + num -= den; + quot += qbit; + } + den >>= 1; + qbit >>= 1; + } + + if (rem_p) + *rem_p = num; + + return quot; +} |