Imported gcc-4.4.3

[msp430-gcc.git] / zlib / contrib / masmx86 / gvmat32c.c

diff --git a/zlib/contrib/masmx86/gvmat32c.c b/zlib/contrib/masmx86/gvmat32c.c
new file mode 100644 (file)
index 0000000..7ad2b27
--- /dev/null
+++ b/zlib/contrib/masmx86/gvmat32c.c
@@ -0,0 +1,62 @@
+/* gvmat32.c -- C portion of the optimized longest_match for 32 bits x86\r
+ * Copyright (C) 1995-1996 Jean-loup Gailly and Gilles Vollant.\r
+ * File written by Gilles Vollant, by modifiying the longest_match\r
+ *  from Jean-loup Gailly in deflate.c\r
+ *  it prepare all parameters and call the assembly longest_match_gvasm\r
+ *  longest_match execute standard C code is wmask != 0x7fff\r
+ *     (assembly code is faster with a fixed wmask)\r
+ *\r
+ * Read comment at beginning of gvmat32.asm for more information\r
+ */\r
+\r
+#if defined(ASMV) && (!defined(NOOLDPENTIUMCODE))\r
+#include "deflate.h"\r
+\r
+/* if your C compiler don't add underline before function name,\r
+        define ADD_UNDERLINE_ASMFUNC */\r
+#ifdef ADD_UNDERLINE_ASMFUNC\r
+#define longest_match_7fff _longest_match_7fff\r
+#define longest_match_686  _longest_match_686\r
+#define cpudetect32        _cpudetect32\r
+#endif\r
+\r
+\r
+unsigned long cpudetect32();\r
+\r
+uInt longest_match_c(\r
+    deflate_state *s,\r
+    IPos cur_match);                             /* current match */\r
+\r
+\r
+uInt longest_match_7fff(\r
+    deflate_state *s,\r
+    IPos cur_match);                             /* current match */\r
+\r
+uInt longest_match_686(\r
+    deflate_state *s,\r
+    IPos cur_match);                             /* current match */\r
+\r
+\r
+static uInt iIsPPro=2;\r
+\r
+void match_init ()\r
+{\r
+    iIsPPro = (((cpudetect32()/0x100)&0xf)>=6) ? 1 : 0;\r
+}\r
+\r
+uInt longest_match(\r
+    deflate_state *s,\r
+    IPos cur_match)                             /* current match */\r
+{\r
+    if (iIsPPro!=0)\r
+        return longest_match_686(s,cur_match);\r
+\r
+    if (s->w_mask != 0x7fff)\r
+        return longest_match_686(s,cur_match);\r
+\r
+    /* now ((s->w_mask == 0x7fff) && (iIsPPro==0)) */\r
+        return longest_match_7fff(s,cur_match);\r
+}\r
+\r
+\r
+#endif /* defined(ASMV) && (!defined(NOOLDPENTIUMCODE)) */\r