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authorDimitry Andric <dim@FreeBSD.org>2015-09-06 18:41:23 +0000
committerDimitry Andric <dim@FreeBSD.org>2015-09-06 18:41:23 +0000
commitf31bcc68c72371a2bf63aead9f3373a1ff2053b6 (patch)
treeb259e5d585da0f8cde9579939a74d5ef44c72abd /lib/builtins/fixunsdfdi.c
parentcd2dd3df15523e2be8d2bbace27641d6ac9fa40d (diff)
downloadsrc-f31bcc68c72371a2bf63aead9f3373a1ff2053b6.tar.gz
src-f31bcc68c72371a2bf63aead9f3373a1ff2053b6.zip
Import compiler-rt 3.7.0 release (r246257).vendor/compiler-rt/compiler-rt-release_370-r246257
Notes
Notes: svn path=/vendor/compiler-rt/dist/; revision=287516 svn path=/vendor/compiler-rt/compiler-rt-release_370-r246257/; revision=287517; tag=vendor/compiler-rt/compiler-rt-release_370-r246257
Diffstat (limited to 'lib/builtins/fixunsdfdi.c')
-rw-r--r--lib/builtins/fixunsdfdi.c55
1 files changed, 26 insertions, 29 deletions
diff --git a/lib/builtins/fixunsdfdi.c b/lib/builtins/fixunsdfdi.c
index 9e6371390d5c..2e0d87eacf05 100644
--- a/lib/builtins/fixunsdfdi.c
+++ b/lib/builtins/fixunsdfdi.c
@@ -6,42 +6,39 @@
* Source Licenses. See LICENSE.TXT for details.
*
* ===----------------------------------------------------------------------===
- *
- * This file implements __fixunsdfdi for the compiler_rt library.
- *
- * ===----------------------------------------------------------------------===
*/
-#include "int_lib.h"
+#define DOUBLE_PRECISION
+#include "fp_lib.h"
-/* Returns: convert a to a unsigned long long, rounding toward zero.
- * Negative values all become zero.
- */
+ARM_EABI_FNALIAS(d2ulz, fixunsdfdi)
-/* Assumption: double is a IEEE 64 bit floating point type
- * du_int is a 64 bit integral type
- * value in double is representable in du_int or is negative
- * (no range checking performed)
+#ifndef __SOFT_FP__
+/* Support for systems that have hardware floating-point; can set the invalid
+ * flag as a side-effect of computation.
*/
-/* seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm */
-
-ARM_EABI_FNALIAS(d2ulz, fixunsdfdi)
-
COMPILER_RT_ABI du_int
__fixunsdfdi(double a)
{
- double_bits fb;
- fb.f = a;
- int e = ((fb.u.s.high & 0x7FF00000) >> 20) - 1023;
- if (e < 0 || (fb.u.s.high & 0x80000000))
- return 0;
- udwords r;
- r.s.high = (fb.u.s.high & 0x000FFFFF) | 0x00100000;
- r.s.low = fb.u.s.low;
- if (e > 52)
- r.all <<= (e - 52);
- else
- r.all >>= (52 - e);
- return r.all;
+ if (a <= 0.0) return 0;
+ su_int high = a/0x1p32f;
+ su_int low = a - (double)high*0x1p32f;
+ return ((du_int)high << 32) | low;
}
+
+#else
+/* Support for systems that don't have hardware floating-point; there are no
+ * flags to set, and we don't want to code-gen to an unknown soft-float
+ * implementation.
+ */
+
+typedef du_int fixuint_t;
+#include "fp_fixuint_impl.inc"
+
+COMPILER_RT_ABI du_int
+__fixunsdfdi(fp_t a) {
+ return __fixuint(a);
+}
+
+#endif