[clang] MIPS/Clang: Use FP32 by default if CPU is mips1 (PR #92122)

[YunQiang Su via cfe-commits]

https://github.com/wzssyqa created https://github.com/llvm/llvm-project/pull/92122

FP32 is the only supported FPMode of mips1.
FPXX requires MIPS2+ and FP64 requires MIPS32r2+.

>From 9cb774c2c1239c752b717888f19691f3c6b7f907 Mon Sep 17 00:00:00 2001
From: YunQiang Su <syq at gcc.gnu.org>
Date: Tue, 14 May 2024 22:00:16 +0800
Subject: [PATCH] MIPS/Clang: Use FP32 by default if CPU is mips1

FP32 is the only supported FPMode of mips1.
FPXX requires MIPS2+ and FP64 requires MIPS32r2+.
---
 clang/lib/Basic/Targets/Mips.h | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/clang/lib/Basic/Targets/Mips.h b/clang/lib/Basic/Targets/Mips.h
index 730deb674aa57..f76c6ece8bf48 100644
--- a/clang/lib/Basic/Targets/Mips.h
+++ b/clang/lib/Basic/Targets/Mips.h
@@ -85,8 +85,13 @@ class LLVM_LIBRARY_VISIBILITY MipsTargetInfo : public TargetInfo {
     return CPU == "mips32r6" || CPU == "mips64r6";
   }
 
-  bool isFP64Default() const {
-    return CPU == "mips32r6" || ABI == "n32" || ABI == "n64" || ABI == "64";
+  enum FPModeEnum getDefaultFPMode() const {
+    if (CPU == "mips32r6" || ABI == "n32" || ABI == "n64" || ABI == "64")
+      return FP64;
+    else if (CPU == "mips1")
+      return FP32;
+    else
+      return FPXX;
   }
 
   bool isNan2008() const override { return IsNan2008; }
@@ -315,8 +320,8 @@ class LLVM_LIBRARY_VISIBILITY MipsTargetInfo : public TargetInfo {
     IsSingleFloat = false;
     FloatABI = HardFloat;
     DspRev = NoDSP;
-    FPMode = isFP64Default() ? FP64 : FPXX;
     NoOddSpreg = false;
+    FPMode = getDefaultFPMode();
     bool OddSpregGiven = false;
     bool StrictAlign = false;