1 files changed, 85 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/ppc/multc3.c b/contrib/llvm-project/compiler-rt/lib/builtins/ppc/multc3.c
new file mode 100644
index 000000000000..f1fd6816d6c8
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/ppc/multc3.c
@@ -0,0 +1,85 @@
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+#include "../int_math.h"
+#include "DD.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 _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;
+}