1 files changed, 121 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_printf.c b/src/gallium/auxiliary/gallivm/lp_bld_printf.c
new file mode 100644
index 0000000000..153ba5b15b
--- /dev/null
+++ b/src/gallium/auxiliary/gallivm/lp_bld_printf.c
@@ -0,0 +1,121 @@
+/**************************************************************************
+ *
+ * Copyright 2010 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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 <stdio.h>
+
+#include "util/u_debug.h"
+#include "util/u_memory.h"
+#include "lp_bld_printf.h"
+
+
+static int
+lp_get_printf_arg_count(const char *fmt)
+{
+   int count =0;
+   const char *p = fmt;
+   int c;
+
+   while ((c = *p++)) {
+      if (c != '%')
+         continue;
+      switch (*p) {
+         case '\0':
+	    continue;
+         case '%':
+	    p++;
+	    continue;
+	 case '.':
+	    if (p[1] == '*' && p[2] == 's') {
+	       count += 2;
+	       p += 3;
+               continue;
+	    }
+	    /* fallthrough */
+	 default:
+	    count ++;
+      }
+   }
+   return count;
+}
+
+LLVMValueRef 
+lp_build_const_string_variable(LLVMModuleRef module, const char *str, int len)
+{
+   LLVMValueRef string = LLVMAddGlobal(module, LLVMArrayType(LLVMInt8Type(), len + 1), "");
+   LLVMSetGlobalConstant(string, TRUE);
+   LLVMSetLinkage(string, LLVMInternalLinkage);
+   LLVMSetInitializer(string, LLVMConstString(str, len + 1, TRUE));
+   return string;
+}
+ 
+
+/**
+ * lp_build_printf.
+ *
+ * Build printf call in LLVM IR. The output goes to stdout.
+ * The additional variable arguments need to have type
+ * LLVMValueRef.
+ */
+LLVMValueRef
+lp_build_printf(LLVMBuilderRef builder, const char *fmt, ...)
+{
+   va_list arglist;
+   int i = 0;
+   int argcount = lp_get_printf_arg_count(fmt);
+   LLVMModuleRef module = LLVMGetGlobalParent(LLVMGetBasicBlockParent(LLVMGetInsertBlock(builder)));
+   LLVMValueRef params[50];
+   LLVMValueRef fmtarg = lp_build_const_string_variable(module, fmt, strlen(fmt) + 1);
+   LLVMValueRef int0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
+   LLVMValueRef index[2];
+   LLVMValueRef func_printf = LLVMGetNamedFunction(module, "printf");
+
+   assert(Elements(params) >= argcount + 1);
+
+   index[0] = index[1] = int0;
+
+   if (!func_printf) {
+      LLVMTypeRef printf_type = LLVMFunctionType(LLVMIntType(32), NULL, 0, 1);
+      func_printf = LLVMAddFunction(module, "printf", printf_type);
+   }
+
+   params[0] = LLVMBuildGEP(builder, fmtarg, index, 2, "");
+
+   va_start(arglist, fmt);
+   for (i = 1; i <= argcount; i++) {
+      LLVMValueRef val = va_arg(arglist, LLVMValueRef);
+      LLVMTypeRef type = LLVMTypeOf(val);
+      /* printf wants doubles, so lets convert so that
+       * we can actually print them */
+      if (LLVMGetTypeKind(type) == LLVMFloatTypeKind)
+         val = LLVMBuildFPExt(builder, val, LLVMDoubleType(), "");
+      params[i] = val;
+   }
+   va_end(arglist);
+
+   return LLVMBuildCall(builder, func_printf, params, argcount + 1, "");
+}
+