From f95a4a932476be2ba99e2fd081e8d2bc6ea12813 Mon Sep 17 00:00:00 2001
From: PikalaxALT <pikalaxalt@gmail.com>
Date: Fri, 15 Dec 2017 09:38:53 -0500
Subject: Import newlib and create makefile

---
 newlib/libm/math/s_floor.c | 134 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 newlib/libm/math/s_floor.c

(limited to 'newlib/libm/math/s_floor.c')

diff --git a/newlib/libm/math/s_floor.c b/newlib/libm/math/s_floor.c
new file mode 100644
index 0000000..65e234e
--- /dev/null
+++ b/newlib/libm/math/s_floor.c
@@ -0,0 +1,134 @@
+
+/* @(#)s_floor.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/*
+FUNCTION
+<<floor>>, <<floorf>>, <<ceil>>, <<ceilf>>---floor and ceiling
+INDEX
+	floor
+INDEX
+	floorf
+INDEX
+	ceil
+INDEX
+	ceilf
+
+ANSI_SYNOPSIS
+	#include <math.h>
+	double floor(double <[x]>);
+        float floorf(float <[x]>);
+        double ceil(double <[x]>);
+        float ceilf(float <[x]>);
+
+TRAD_SYNOPSIS
+	#include <math.h>
+        double floor(<[x]>)
+	double <[x]>;
+        float floorf(<[x]>) 
+	float <[x]>;
+        double ceil(<[x]>) 
+	double <[x]>;
+        float ceilf(<[x]>) 
+	float <[x]>;
+
+DESCRIPTION
+<<floor>> and <<floorf>> find 
+@tex
+$\lfloor x \rfloor$, 
+@end tex
+the nearest integer less than or equal to <[x]>.
+<<ceil>> and <<ceilf>> find 
+@tex
+$\lceil x\rceil$,
+@end tex
+the nearest integer greater than or equal to <[x]>.
+
+RETURNS
+<<floor>> and <<ceil>> return the integer result as a double.
+<<floorf>> and <<ceilf>> return the integer result as a float.
+
+PORTABILITY
+<<floor>> and <<ceil>> are ANSI.
+<<floorf>> and <<ceilf>> are extensions.
+
+
+*/
+
+/*
+ * floor(x)
+ * Return x rounded toward -inf to integral value
+ * Method:
+ *	Bit twiddling.
+ * Exception:
+ *	Inexact flag raised if x not equal to floor(x).
+ */
+
+#include "fdlibm.h"
+
+#ifndef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+static const double huge = 1.0e300;
+#else
+static double huge = 1.0e300;
+#endif
+
+#ifdef __STDC__
+	double floor(double x)
+#else
+	double floor(x)
+	double x;
+#endif
+{
+	__int32_t i0,i1,j0;
+	__uint32_t i,j;
+	EXTRACT_WORDS(i0,i1,x);
+	j0 = ((i0>>20)&0x7ff)-0x3ff;
+	if(j0<20) {
+	    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&0x7fffffff)|i1)!=0)
+			{ i0=0xbff00000;i1=0;}
+		}
+	    } else {
+		i = (0x000fffff)>>j0;
+		if(((i0&i)|i1)==0) return x; /* x is integral */
+		if(huge+x>0.0) {	/* raise inexact flag */
+		    if(i0<0) i0 += (0x00100000)>>j0;
+		    i0 &= (~i); i1=0;
+		}
+	    }
+	} else if (j0>51) {
+	    if(j0==0x400) return x+x;	/* inf or NaN */
+	    else return x;		/* x is integral */
+	} else {
+	    i = ((__uint32_t)(0xffffffff))>>(j0-20);
+	    if((i1&i)==0) return x;	/* x is integral */
+	    if(huge+x>0.0) { 		/* raise inexact flag */
+		if(i0<0) {
+		    if(j0==20) i0+=1; 
+		    else {
+			j = i1+(1<<(52-j0));
+			if(j<i1) i0 +=1 ; 	/* got a carry */
+			i1=j;
+		    }
+		}
+		i1 &= (~i);
+	    }
+	}
+	INSERT_WORDS(x,i0,i1);
+	return x;
+}
+
+#endif /* _DOUBLE_IS_32BITS */
-- 
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