Import newlib and create makefile

1 files changed, 43 insertions, 0 deletions

diff --git a/newlib/libc/machine/i386/f_frexp.S b/newlib/libc/machine/i386/f_frexp.S
new file mode 100644
index 0000000..8724f52
--- /dev/null
+++ b/newlib/libc/machine/i386/f_frexp.S
@@ -0,0 +1,43 @@
+/*
+ * ====================================================
+ * Copyright (C) 1998 by Cygnus Solutions. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+Fast version of frexp using Intel float instructions.
+
+   double _f_frexp (double x, int *exp);
+
+Function splits x into y * 2 ** z.  It then
+returns the value of y and updates *exp with z.
+There is no error checking or setting of errno.
+*/
+
+	#include "i386mach.h"
+
+	.global SYM (_f_frexp)
+
+SYM (_f_frexp):
+	pushl ebp
+	movl esp,ebp
+	fldl 8(ebp)
+	movl 16(ebp),eax
+
+	fxtract
+	fld1
+	fchs
+	fxch
+	fscale
+	fstp st1
+	fxch
+	fld1
+	faddp
+	fistpl 0(eax)
+
+	leave
+	ret