From 12f09260294175dc097b843d3d06d048b9cd64a3 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 5 Oct 2008 21:49:27 +0000
Subject: [PATCH] move __FLT_EVAL_METHOD__, __FLT_RADIX__, and __DECIMAL_DIG__
 into target indep code.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57139 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Basic/Targets.cpp    | 15 +--------------
 lib/Lex/Preprocessor.cpp | 14 ++++++++++----
 2 files changed, 11 insertions(+), 18 deletions(-)

diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index d990dd0d59..424be5f268 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -119,12 +119,7 @@ static void getPowerPCDefines(std::vector<char> &Defs, bool is64Bit) {
   Define(Defs, "__NATURAL_ALIGNMENT__");
   Define(Defs, "__REGISTER_PREFIX__", "");
 
-  Define(Defs, "__FLT_EVAL_METHOD__", "0");
-  Define(Defs, "__FLT_RADIX__", "2");
-  Define(Defs, "__DECIMAL_DIG__", "33");
-
-  Define(Defs, "__LDBL_MIN_10_EXP__", "(-291)");
-  
+  // FIXME: Should be controlled by command line option.
   Define(Defs, "__LONG_DOUBLE_128__");
 }
 
@@ -158,10 +153,6 @@ static void getX86Defines(std::vector<char> &Defs, bool is64Bit) {
   Define(Defs, "__SSE__");
   Define(Defs, "__MMX__");
   Define(Defs, "__REGISTER_PREFIX__", "");
-
-  Define(Defs, "__FLT_EVAL_METHOD__", "0");
-  Define(Defs, "__FLT_RADIX__", "2");
-  Define(Defs, "__DECIMAL_DIG__", "21");
 }
 
 /// getARMDefines - Return a set of the ARM-specific #defines that are
@@ -178,10 +169,6 @@ static void getARMDefines(std::vector<char> &Defs) {
   Define(Defs, "__ARM_ARCH_6K__");
   Define(Defs, "__ARMEL__");
   Define(Defs, "__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__", "20000");
-  
-  Define(Defs, "__FLT_EVAL_METHOD__", "0");
-  Define(Defs, "__FLT_RADIX__", "2");
-  Define(Defs, "__DECIMAL_DIG__", "17");
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index 0c1accd6c2..6c5daae13b 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -612,11 +612,10 @@ static void InitializePredefinedMacros(Preprocessor &PP,
     Buf.push_back('\n');
   }
   
+  char MacroBuf[60];
   if (const char *Prefix = TI.getUserLabelPrefix()) {
-    llvm::SmallString<20> TmpStr;
-    TmpStr += "__USER_LABEL_PREFIX__=";
-    TmpStr += Prefix;
-    DefineBuiltinMacro(Buf, TmpStr.c_str());
+    sprintf(MacroBuf, "__USER_LABEL_PREFIX__=%s", Prefix);
+    DefineBuiltinMacro(Buf, MacroBuf);
   }
   
   // Build configuration options.  FIXME: these should be controlled by
@@ -626,6 +625,13 @@ static void InitializePredefinedMacros(Preprocessor &PP,
   DefineBuiltinMacro(Buf, "__NO_INLINE__=1");
   DefineBuiltinMacro(Buf, "__PIC__=1");
 
+  // Macros to control C99 numerics and <float.h>
+  DefineBuiltinMacro(Buf, "__FLT_EVAL_METHOD__=0");
+  DefineBuiltinMacro(Buf, "__FLT_RADIX__=2");
+  sprintf(MacroBuf, "__DECIMAL_DIG__=%d",
+          PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33));
+  DefineBuiltinMacro(Buf, MacroBuf);
+  
   // Get other target #defines.
   TI.getTargetDefines(Buf);
   
-- 
2.40.0