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-rw-r--r--lib/builtins/fixdfdi.c57
1 files changed, 29 insertions, 28 deletions
diff --git a/lib/builtins/fixdfdi.c b/lib/builtins/fixdfdi.c
index 86f9f6ce8db3..14283ef42e61 100644
--- a/lib/builtins/fixdfdi.c
+++ b/lib/builtins/fixdfdi.c
@@ -6,40 +6,41 @@
* Source Licenses. See LICENSE.TXT for details.
*
* ===----------------------------------------------------------------------===
- *
- * This file implements __fixdfdi for the compiler_rt library.
- *
- * ===----------------------------------------------------------------------===
*/
-#include "int_lib.h"
-
-/* Returns: convert a to a signed long long, rounding toward zero. */
+#define DOUBLE_PRECISION
+#include "fp_lib.h"
+ARM_EABI_FNALIAS(d2lz, fixdfdi)
-/* Assumption: double is a IEEE 64 bit floating point type
- * su_int is a 32 bit integral type
- * value in double is representable in di_int (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(d2lz, fixdfdi)
+COMPILER_RT_ABI du_int __fixunsdfdi(double a);
COMPILER_RT_ABI di_int
__fixdfdi(double a)
{
- double_bits fb;
- fb.f = a;
- int e = ((fb.u.s.high & 0x7FF00000) >> 20) - 1023;
- if (e < 0)
- return 0;
- di_int s = (si_int)(fb.u.s.high & 0x80000000) >> 31;
- dwords 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 ^ s) - s;
-}
+ if (a < 0.0) {
+ return -__fixunsdfdi(-a);
+ }
+ return __fixunsdfdi(a);
+}
+
+#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 di_int fixint_t;
+typedef du_int fixuint_t;
+#include "fp_fixint_impl.inc"
+
+COMPILER_RT_ABI di_int
+__fixdfdi(fp_t a) {
+ return __fixint(a);
+}
+
+#endif