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author | Michael Brown | 2007-07-30 03:37:42 +0200 |
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committer | Michael Brown | 2007-07-30 03:43:43 +0200 |
commit | 4ce8d61a5cb8a0e3f68bff8400ba2b8246c9a58f (patch) | |
tree | 807be055e6f6edd1c8f85cf6c17635251f0c276a /src/libgcc/__moddi3.c | |
parent | GCC's optimiser seems to screw up if this is left static... (diff) | |
download | ipxe-4ce8d61a5cb8a0e3f68bff8400ba2b8246c9a58f.tar.gz ipxe-4ce8d61a5cb8a0e3f68bff8400ba2b8246c9a58f.tar.xz ipxe-4ce8d61a5cb8a0e3f68bff8400ba2b8246c9a58f.zip |
Import various libgcc functions from syslinux.
Experimentation reveals that gcc ignores -mrtd for the implicit
arithmetic functions (e.g. __udivdi3), but not for the implicit
memcpy() and memset() functions. Mark the implicit arithmetic
functions with __attribute__((cdecl)) to compensate for this.
(Note: we cannot mark with with __cdecl, because we define __cdecl to
incorporate regparm(0) as well.)
Diffstat (limited to 'src/libgcc/__moddi3.c')
-rw-r--r-- | src/libgcc/__moddi3.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/libgcc/__moddi3.c b/src/libgcc/__moddi3.c new file mode 100644 index 00000000..eb7784b7 --- /dev/null +++ b/src/libgcc/__moddi3.c @@ -0,0 +1,26 @@ +/* + * arch/i386/libgcc/__moddi3.c + */ + +#include "libgcc.h" + +LIBGCC int64_t __moddi3(int64_t num, int64_t den) +{ + int minus = 0; + int64_t v; + + if ( num < 0 ) { + num = -num; + minus = 1; + } + if ( den < 0 ) { + den = -den; + minus ^= 1; + } + + (void) __udivmoddi4(num, den, (uint64_t *)&v); + if ( minus ) + v = -v; + + return v; +} |