1 files changed, 56 insertions, 0 deletions
diff --git a/newlib/libm/machine/amdgcn/v64sf_ilogb.c b/newlib/libm/machine/amdgcn/v64sf_ilogb.c
new file mode 100644
index 000000000..2f2a7cac7
--- /dev/null
+++ b/newlib/libm/machine/amdgcn/v64sf_ilogb.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2023 Siemens
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions.  No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/* Based on newlib/libm/common/sf_ilogb.c in Newlib.  */
+
+#include "amdgcnmach.h"
+
+DEF_VS_MATH_FUNC (v64si, ilogbf, v64sf x)
+{
+  FUNCTION_INIT(v64si);
+
+  v64si hx, ix;
+  GET_FLOAT_WORD (hx, x, NO_COND);
+  hx &= 0x7fffffff;
+  VECTOR_IF (FLT_UWORD_IS_ZERO (hx), cond)
+    VECTOR_RETURN (VECTOR_INIT (-__INT_MAX__), cond);  // FP_ILOGB0
+  VECTOR_ENDIF
+  VECTOR_IF (FLT_UWORD_IS_SUBNORMAL (hx), cond)
+    ix = VECTOR_INIT (-126);
+    for (v64si i = (hx << 8);
+       !ALL_ZEROES_P (cond & (i > 0));
+       i <<= 1)
+      VECTOR_COND_MOVE (ix, ix - 1, cond & (i > 0));
+    VECTOR_RETURN (ix, cond);
+  VECTOR_ELSEIF (~FLT_UWORD_IS_FINITE (hx), cond)
+    VECTOR_RETURN (VECTOR_INIT (__INT_MAX__), cond);
+  VECTOR_ENDIF
+
+  VECTOR_RETURN ((hx >> 23) - 127, NO_COND);
+
+  FUNCTION_RETURN;
+}
+
+DEF_VARIANTS (ilogbf, si, sf)