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author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
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committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
tree | 65ca85f13617aee1dce474596800950f266a456c /roms/ipxe/src/libgcc/__udivmoddi4.c | |
download | qemu-3f2546b2ef55b661fd8dd69682b38992225e86f6.tar.gz qemu-3f2546b2ef55b661fd8dd69682b38992225e86f6.tar.bz2 qemu-3f2546b2ef55b661fd8dd69682b38992225e86f6.zip |
Diffstat (limited to 'roms/ipxe/src/libgcc/__udivmoddi4.c')
-rw-r--r-- | roms/ipxe/src/libgcc/__udivmoddi4.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/roms/ipxe/src/libgcc/__udivmoddi4.c b/roms/ipxe/src/libgcc/__udivmoddi4.c new file mode 100644 index 00000000..21e0d51f --- /dev/null +++ b/roms/ipxe/src/libgcc/__udivmoddi4.c @@ -0,0 +1,32 @@ +#include "libgcc.h" + +__libgcc uint64_t __udivmoddi4(uint64_t num, uint64_t den, uint64_t *rem_p) +{ + uint64_t quot = 0, qbit = 1; + + if ( den == 0 ) { + return 1/((unsigned)den); /* Intentional divide by zero, without + triggering a compiler warning which + would abort the build */ + } + + /* 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; +} |