1 files changed, 62 insertions, 0 deletions
diff --git a/libquadmath/math/floorq.c b/libquadmath/math/floorq.c
new file mode 100644
index 000000000..781cf40e3
--- /dev/null
+++ b/libquadmath/math/floorq.c
@@ -0,0 +1,62 @@
+/* s_floorl.c -- long double version of s_floor.c.
+ * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#include "quadmath-imp.h"
+
+static const __float128 huge = 1.0e4930Q;
+
+__float128
+floorq (__float128 x)
+{
+	int64_t i0,i1,j0;
+	uint64_t i,j;
+	GET_FLT128_WORDS64(i0,i1,x);
+	j0 = ((i0>>48)&0x7fff)-0x3fff;
+	if(j0<48) {
+	    if(j0<0) { 	/* raise inexact if x != 0 */
+		if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
+		    if(i0>=0) {i0=i1=0;}
+		    else if(((i0&0x7fffffffffffffffLL)|i1)!=0)
+			{ i0=0xbfff000000000000ULL;i1=0;}
+		}
+	    } else {
+		i = (0x0000ffffffffffffULL)>>j0;
+		if(((i0&i)|i1)==0) return x; /* x is integral */
+		if(huge+x>0.0) {	/* raise inexact flag */
+		    if(i0<0) i0 += (0x0001000000000000LL)>>j0;
+		    i0 &= (~i); i1=0;
+		}
+	    }
+	} else if (j0>111) {
+	    if(j0==0x4000) return x+x;	/* inf or NaN */
+	    else return x;		/* x is integral */
+	} else {
+	    i = -1ULL>>(j0-48);
+	    if((i1&i)==0) return x;	/* x is integral */
+	    if(huge+x>0.0) { 		/* raise inexact flag */
+		if(i0<0) {
+		    if(j0==48) i0+=1;
+		    else {
+			j = i1+(1LL<<(112-j0));
+			if(j<i1) i0 +=1 ; 	/* got a carry */
+			i1=j;
+		    }
+		}
+		i1 &= (~i);
+	    }
+	}
+	SET_FLT128_WORDS64(x,i0,i1);
+	return x;
+}