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softfp.c

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+/*
+ * SoftFP Library
+ * 
+ * Copyright (c) 2016 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+
+#include "cutils.h"
+#include "softfp.h"
+
+static inline int clz32(uint32_t a)
+{
+    int r;
+    if (a == 0) {
+        r = 32;
+    } else {
+        r = __builtin_clz(a);
+    }
+    return r;
+}
+
+static inline int clz64(uint64_t a)
+{
+    int r;
+    if (a == 0) {
+        r = 64;
+    } else 
+    {
+        r = __builtin_clzll(a);
+    }
+    return r;
+}
+
+#ifdef HAVE_INT128
+static inline int clz128(uint128_t a)
+{
+    int r;
+    if (a == 0) {
+        r = 128;
+    } else 
+    {
+        uint64_t ah, al;
+        ah = a >> 64;
+        al = a;
+        if (ah != 0)
+            r = __builtin_clzll(ah);
+        else
+            r = __builtin_clzll(al) + 64;
+    }
+    return r;
+}
+#endif
+
+#define F_SIZE 32
+#include "softfp_template.h"
+
+#define F_SIZE 64
+#include "softfp_template.h"
+
+#ifdef HAVE_INT128
+
+#define F_SIZE 128
+#include "softfp_template.h"
+
+#endif
+