1 files changed, 94 insertions, 0 deletions
diff --git a/lib/builtins/ppc/multc3.c b/lib/builtins/ppc/multc3.c
new file mode 100644
index 0000000000000..738b65a83b03a
--- /dev/null
+++ b/lib/builtins/ppc/multc3.c
@@ -0,0 +1,94 @@
+/* This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ */
+
+#include "DD.h"
+#include "../int_math.h"
+
+#define makeFinite(x) { \
+    (x).s.hi = crt_copysign(crt_isinf((x).s.hi) ? 1.0 : 0.0, (x).s.hi); \
+    (x).s.lo = 0.0;                                                     \
+  }
+
+#define zeroNaN(x) { \
+    if (crt_isnan((x).s.hi)) {                                          \
+      (x).s.hi = crt_copysign(0.0, (x).s.hi);                     \
+      (x).s.lo = 0.0;                                                   \
+    }                                                                   \
+  }
+
+long double __gcc_qadd(long double, long double);
+long double __gcc_qsub(long double, long double);
+long double __gcc_qmul(long double, long double);
+
+long double _Complex
+__multc3(long double a, long double b, long double c, long double d)
+{
+	long double ac = __gcc_qmul(a,c);
+	long double bd = __gcc_qmul(b,d);
+	long double ad = __gcc_qmul(a,d);
+	long double bc = __gcc_qmul(b,c);
+	
+	DD real = { .ld = __gcc_qsub(ac,bd) };
+	DD imag = { .ld = __gcc_qadd(ad,bc) };
+	
+	if (crt_isnan(real.s.hi) && crt_isnan(imag.s.hi))
+	{
+		int recalc = 0;
+		
+		DD aDD = { .ld = a };
+		DD bDD = { .ld = b };
+		DD cDD = { .ld = c };
+		DD dDD = { .ld = d };
+		
+		if (crt_isinf(aDD.s.hi) || crt_isinf(bDD.s.hi))
+		{
+			makeFinite(aDD);
+			makeFinite(bDD);
+			zeroNaN(cDD);
+			zeroNaN(dDD);
+			recalc = 1;
+		}
+		
+		if (crt_isinf(cDD.s.hi) || crt_isinf(dDD.s.hi))
+		{
+			makeFinite(cDD);
+			makeFinite(dDD);
+			zeroNaN(aDD);
+			zeroNaN(bDD);
+			recalc = 1;
+		}
+		
+		if (!recalc)
+		{
+			DD acDD = { .ld = ac };
+			DD bdDD = { .ld = bd };
+			DD adDD = { .ld = ad };
+			DD bcDD = { .ld = bc };
+			
+			if (crt_isinf(acDD.s.hi) || crt_isinf(bdDD.s.hi) ||
+                            crt_isinf(adDD.s.hi) || crt_isinf(bcDD.s.hi))
+			{
+				zeroNaN(aDD);
+				zeroNaN(bDD);
+				zeroNaN(cDD);
+				zeroNaN(dDD);
+				recalc = 1;
+			}
+		}
+		
+		if (recalc)
+		{
+			real.s.hi = CRT_INFINITY * (aDD.s.hi*cDD.s.hi - bDD.s.hi*dDD.s.hi);
+			real.s.lo = 0.0;
+			imag.s.hi = CRT_INFINITY * (aDD.s.hi*dDD.s.hi + bDD.s.hi*cDD.s.hi);
+			imag.s.lo = 0.0;
+		}
+	}
+	
+	long double _Complex z;
+	__real__ z = real.ld;
+	__imag__ z = imag.ld;
+	
+	return z;
+}