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-rw-r--r--ports/sysdeps/alpha/soft-fp/local-soft-fp.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/ports/sysdeps/alpha/soft-fp/local-soft-fp.h b/ports/sysdeps/alpha/soft-fp/local-soft-fp.h
new file mode 100644
index 0000000000..e93a2ad064
--- /dev/null
+++ b/ports/sysdeps/alpha/soft-fp/local-soft-fp.h
@@ -0,0 +1,44 @@
+#include <stdlib.h>
+#include <soft-fp.h>
+#include <quad.h>
+
+/* Helpers for the Ots functions which receive long double arguments
+   in two integer registers, and return values in $16+$17.  */
+
+#undef _FP_UNPACK_RAW_2
+#define _FP_UNPACK_RAW_2(fs, X, val)                    \
+  do {                                                  \
+    union _FP_UNION_##fs _flo;				\
+    _flo.longs.a = val##l;				\
+    _flo.longs.b = val##h;				\
+    X##_f0 = _flo.bits.frac0;				\
+    X##_f1 = _flo.bits.frac1;				\
+    X##_e  = _flo.bits.exp;				\
+    X##_s  = _flo.bits.sign;				\
+  } while (0)
+
+#undef _FP_PACK_RAW_2
+#define _FP_PACK_RAW_2(fs, val, X)                      \
+  do {                                                  \
+    union _FP_UNION_##fs _flo;				\
+    _flo.bits.frac0 = X##_f0;				\
+    _flo.bits.frac1 = X##_f1;				\
+    _flo.bits.exp   = X##_e;				\
+    _flo.bits.sign  = X##_s;				\
+    val##l = _flo.longs.a;				\
+    val##h = _flo.longs.b;				\
+  } while (0)
+
+#define FP_DECL_RETURN(X) \
+  long X##l, X##h
+
+/* ??? We don't have a real way to tell the compiler that we're wanting
+   to return values in $16+$17.  Instead use a volatile asm to make sure
+   that the values are live, and just hope that nothing kills the values
+   in between here and the end of the function.  */
+#define FP_RETURN(X)				\
+do {						\
+  register long r16 __asm__("16") = X##l;	\
+  register long r17 __asm__("17") = X##h;	\
+  asm volatile ("" : : "r"(r16), "r"(r17));	\
+} while (0)