[clang] [clang][Driver] Define soft float macros for PPC. (PR #106012)

[Alex Rønne Petersen via cfe-commits]

https://github.com/alexrp created https://github.com/llvm/llvm-project/pull/106012

Fixes #105972.

>From 5d52fe0d6d9bad77193a114eaef324d1799f2444 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex at alexrp.com>
Date: Sun, 25 Aug 2024 22:47:37 +0200
Subject: [PATCH] [clang][Driver] Define soft float macros for PPC.

Fixes #105972.
---
 clang/lib/Basic/Targets/PPC.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/clang/lib/Basic/Targets/PPC.cpp b/clang/lib/Basic/Targets/PPC.cpp
index 04dc436eb1b9cd..91145b256804c7 100644
--- a/clang/lib/Basic/Targets/PPC.cpp
+++ b/clang/lib/Basic/Targets/PPC.cpp
@@ -402,9 +402,13 @@ void PPCTargetInfo::getTargetDefines(const LangOptions &Opts,
     Builder.defineMacro("__VEC__", "10206");
     Builder.defineMacro("__ALTIVEC__");
   }
-  if (HasSPE) {
+  if (HasSPE)
     Builder.defineMacro("__SPE__");
+  if (HasSPE || FloatABI == SoftFloat)
     Builder.defineMacro("__NO_FPRS__");
+  if (FloatABI == SoftFloat) {
+    Builder.defineMacro("_SOFT_FLOAT");
+    Builder.defineMacro("_SOFT_DOUBLE");
   }
   if (HasVSX)
     Builder.defineMacro("__VSX__");
@@ -439,14 +443,12 @@ void PPCTargetInfo::getTargetDefines(const LangOptions &Opts,
   // FIXME: The following are not yet generated here by Clang, but are
   //        generated by GCC:
   //
-  //   _SOFT_FLOAT_
   //   __RECIP_PRECISION__
   //   __APPLE_ALTIVEC__
   //   __RECIP__
   //   __RECIPF__
   //   __RSQRTE__
   //   __RSQRTEF__
-  //   _SOFT_DOUBLE_
   //   __NO_LWSYNC__
   //   __CMODEL_MEDIUM__
   //   __CMODEL_LARGE__