From de28b4d36616ed583ec247639d13bd76216fd3bf Mon Sep 17 00:00:00 2001
From: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Date: Fri, 19 Oct 2018 10:09:49 -0300
Subject: [PATCH] powerpc64: Add support for IEEE 128-bit floating point long
 double

---
 INSTALL                     |  4 ++--
 arch/powerpc64/bits/float.h | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/INSTALL b/INSTALL
index a2a142bf..00d7282d 100644
--- a/INSTALL
+++ b/INSTALL
@@ -76,8 +76,8 @@ and ABI combinations:
 
 * PowerPC64
     * Both little and big endian variants are supported
-    * Compiler toolchain must provide 64-bit long double, not IBM
-      double-double or IEEE quad
+    * Compiler toolchain must provide 64-bit long double, or IEEE 128-bit
+      long double not IBM double-double
     * Compiler toolchain must use the new (ELFv2) ABI regardless of
       whether it is for little or big endian
 
diff --git a/arch/powerpc64/bits/float.h b/arch/powerpc64/bits/float.h
index c4a655e7..4e485512 100644
--- a/arch/powerpc64/bits/float.h
+++ b/arch/powerpc64/bits/float.h
@@ -1,3 +1,19 @@
+#if __LDBL_MANT_DIG__ == 113
+#define LDBL_TRUE_MIN 6.47517511943802511092443895822764655e-4966L
+#define LDBL_MIN 3.36210314311209350626267781732175260e-4932L
+#define LDBL_MAX 1.18973149535723176508575932662800702e+4932L
+#define LDBL_EPSILON 1.92592994438723585305597794258492732e-34L
+
+#define LDBL_MANT_DIG 113
+#define LDBL_MIN_EXP (-16381)
+#define LDBL_MAX_EXP 16384
+
+#define LDBL_DIG 33
+#define LDBL_MIN_10_EXP (-4931)
+#define LDBL_MAX_10_EXP 4932
+
+#define DECIMAL_DIG__ 36
+#else
 #define FLT_EVAL_METHOD 0
 
 #define LDBL_TRUE_MIN 4.94065645841246544177e-324L
@@ -14,3 +30,4 @@
 #define LDBL_MAX_10_EXP 308
 
 #define DECIMAL_DIG 17
+#endif
-- 
2.14.4