Add incomplet long double math support to libmingwex.a

1 files changed, 35 insertions, 0 deletions

diff --git a/winsup/mingw/mingwex/math/floorf.S b/winsup/mingw/mingwex/math/floorf.S
new file mode 100644
index 000000000..8ae8100a7
--- /dev/null
+++ b/winsup/mingw/mingwex/math/floorf.S
@@ -0,0 +1,35 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ *
+ * Changes for long double by Ulrich Drepper <drepper@cygnus.com>
+ * 
+ * Removed header file dependency for use in libmingwex.a by
+ *   Danny Smith <dannysmith@users.sourceforge.net>
+ */
+	.file	"floorf.S"
+	.text
+	.align 4
+.globl _floorf
+	.def	_floorf;	.scl	2;	.type	32;	.endef
+_floorf:
+	flds	4(%esp)
+	subl	$8,%esp
+
+	fstcw	4(%esp)			/* store fpu control word */
+
+	/* We use here %edx although only the low 1 bits are defined.
+	   But none of the operations should care and they are faster
+	   than the 16 bit operations.  */
+	movl	$0x400,%edx		/* round towards -oo */
+	orl	4(%esp),%edx
+	andl	$0xf7ff,%edx
+	movl	%edx,(%esp)
+	fldcw	(%esp)			/* load modified control word */
+
+	frndint				/* round */
+
+	fldcw	4(%esp)			/* restore original control word */
+
+	addl	$8,%esp
+	ret