aboutsummaryrefslogtreecommitdiffstats
path: root/lib/subdf3.c
diff options
context:
space:
mode:
authorEd Schouten <ed@FreeBSD.org>2011-06-02 20:02:42 +0000
committerEd Schouten <ed@FreeBSD.org>2011-06-02 20:02:42 +0000
commitb0a04aaa595ba76468e521f12727a872d144d6d0 (patch)
tree51db692a6c937b68c7180d996af6bb7952b4b55d /lib/subdf3.c
parentf170b6928b38a264ce005e5fa80d428364b6f659 (diff)
downloadsrc-b0a04aaa595ba76468e521f12727a872d144d6d0.tar.gz
src-b0a04aaa595ba76468e521f12727a872d144d6d0.zip
Import compiler-rt r132478.vendor/compiler-rt/compiler-rt-r132478
Notes
Notes: svn path=/vendor/compiler-rt/dist/; revision=222625 svn path=/vendor/compiler-rt/compiler-rt-r132478/; revision=222626; tag=vendor/compiler-rt/compiler-rt-r132478
Diffstat (limited to 'lib/subdf3.c')
-rw-r--r--lib/subdf3.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/subdf3.c b/lib/subdf3.c
new file mode 100644
index 000000000000..825e3c662973
--- /dev/null
+++ b/lib/subdf3.c
@@ -0,0 +1,30 @@
+//===-- lib/adddf3.c - Double-precision subtraction ---------------*- C -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements double-precision soft-float subtraction with the
+// IEEE-754 default rounding (to nearest, ties to even).
+//
+//===----------------------------------------------------------------------===//
+#include "abi.h"
+
+#define DOUBLE_PRECISION
+#include "fp_lib.h"
+
+fp_t COMPILER_RT_ABI __adddf3(fp_t a, fp_t b);
+
+
+ARM_EABI_FNALIAS(dsub, subdf3);
+
+// Subtraction; flip the sign bit of b and add.
+COMPILER_RT_ABI fp_t
+__subdf3(fp_t a, fp_t b) {
+ return __adddf3(a, fromRep(toRep(b) ^ signBit));
+}
+
+/* FIXME: rsub for ARM EABI */