From: Lulu Cheng <chenglulu@loongson.cn>
Date: Sat, 22 Mar 2025 06:37:01 +0000 (+0800)
Subject: LoongArch: Support Q suffix for __float128.
X-Git-Tag: releases/gcc-14.3.0~343
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=243e634f5bee3912685756f31d3648df73fa6938;p=thirdparty%2Fgcc.git

LoongArch: Support Q suffix for __float128.

In r14-3635 supports `__float128`, but does not support the 'q/Q' suffix.

	PR target/119408

gcc/ChangeLog:

	* config/loongarch/loongarch.cc
	(loongarch_c_mode_for_suffix): New.
	(TARGET_C_MODE_FOR_SUFFIX): Define.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/pr119408.c: New test.

(cherry picked from commit 7c8da04c412ed4f54596f10434aa46592d000fbf)
---

diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 4b456e3ef1f..afedc8e33e4 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -11004,6 +11004,16 @@ loongarch_asm_code_end (void)
 #undef DUMP_FEATURE
 }
 
+/* Target hook for c_mode_for_suffix.  */
+static machine_mode
+loongarch_c_mode_for_suffix (char suffix)
+{
+  if (suffix == 'q')
+    return TFmode;
+
+  return VOIDmode;
+}
+
 /* Initialize the GCC target structure.  */
 #undef TARGET_ASM_ALIGNED_HI_OP
 #define TARGET_ASM_ALIGNED_HI_OP "\t.half\t"
@@ -11263,6 +11273,9 @@ loongarch_asm_code_end (void)
 #define TARGET_VECTORIZE_SUPPORT_VECTOR_MISALIGNMENT \
   loongarch_builtin_support_vector_misalignment
 
+#undef TARGET_C_MODE_FOR_SUFFIX
+#define TARGET_C_MODE_FOR_SUFFIX loongarch_c_mode_for_suffix
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 #include "gt-loongarch.h"
diff --git a/gcc/testsuite/gcc.target/loongarch/pr119408.c b/gcc/testsuite/gcc.target/loongarch/pr119408.c
new file mode 100644
index 00000000000..f46399aa0b5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/pr119408.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wno-pedantic" } */
+
+__float128 a;
+__float128 b;
+void
+test (void)
+{
+  a = 1.11111111Q;
+  b = 1.434345q;	
+}
+