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author | andrew <andrew@FreeBSD.org> | 2012-07-30 10:58:13 +0000 |
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committer | andrew <andrew@FreeBSD.org> | 2012-07-30 10:58:13 +0000 |
commit | cfeab007a554034f0b3ab4a677cf9dd2696c12f9 (patch) | |
tree | 40cc44a3d02ed86de24f2117a55680e4f0eb01a0 /lib/divsi3.c | |
parent | 07af089f1449ec5506ca7ede5b593e11a0f48603 (diff) | |
download | FreeBSD-src-cfeab007a554034f0b3ab4a677cf9dd2696c12f9.zip FreeBSD-src-cfeab007a554034f0b3ab4a677cf9dd2696c12f9.tar.gz |
Import compiler-rt r160957.
Diffstat (limited to 'lib/divsi3.c')
-rw-r--r-- | lib/divsi3.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/divsi3.c b/lib/divsi3.c index 0d81cb8..cd19de9 100644 --- a/lib/divsi3.c +++ b/lib/divsi3.c @@ -18,7 +18,7 @@ su_int COMPILER_RT_ABI __udivsi3(su_int n, su_int d); /* Returns: a / b */ -ARM_EABI_FNALIAS(idiv, divsi3); +ARM_EABI_FNALIAS(idiv, divsi3) COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b) @@ -29,5 +29,11 @@ __divsi3(si_int a, si_int b) a = (a ^ s_a) - s_a; /* negate if s_a == -1 */ b = (b ^ s_b) - s_b; /* negate if s_b == -1 */ s_a ^= s_b; /* sign of quotient */ - return (__udivsi3(a, b) ^ s_a) - s_a; /* negate if s_a == -1 */ + /* + * On CPUs without unsigned hardware division support, + * this calls __udivsi3 (notice the cast to su_int). + * On CPUs with unsigned hardware division support, + * this uses the unsigned division instruction. + */ + return ((su_int)a/(su_int)b ^ s_a) - s_a; /* negate if s_a == -1 */ } |