[glibc] or1k: Only define fpu rouding and exceptions with hard-float

[glibc] or1k: Only define fpu rouding and exceptions with hard-float

[Stafford Horne]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=df7e29e2a4aadc7e19669eaf953cee1bcf8b156f

commit df7e29e2a4aadc7e19669eaf953cee1bcf8b156f
Author: Stafford Horne <shorne@gmail.com>
Date:   Tue Mar 19 20:53:37 2024 +0000

    or1k: Only define fpu rouding and exceptions with hard-float
    
    This test failure:
    
      math/test-fenv
    
    If rounding mode and exception macros are defined then the fenv tests
    run and always fail.  This patch adds an ifdef using the
    __or1k_hard_float__ macro provided by gcc to avoid defining these fenv
    macros when they cnnot be used.  This is similar to what is done in csky.
    
    Note, I will post the or1k hard-float support soon. So, I prefer to
    leave the hard-float bits here for now.

Diff:
---
 sysdeps/or1k/bits/fenv.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/sysdeps/or1k/bits/fenv.h b/sysdeps/or1k/bits/fenv.h
index 587039ca03..01267805e6 100644
--- a/sysdeps/or1k/bits/fenv.h
+++ b/sysdeps/or1k/bits/fenv.h
@@ -21,6 +21,7 @@
 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
 #endif
 
+#ifdef __or1k_hard_float__
 /* Define bits representing exceptions in the FPCSR status word.  */
 enum
   {
@@ -51,6 +52,24 @@ enum
 #define FE_UPWARD     (0x2 << 1)
 #define FE_DOWNWARD   (0x3 << 1)
 
+#else
+
+/* In the soft-float case only rounding to nearest is supported, with
+   no exceptions.  */
+
+enum
+  {
+    __FE_UNDEFINED = -1,
+
+    FE_TONEAREST =
+# define FE_TONEAREST	0x0
+      FE_TONEAREST
+  };
+
+# define FE_ALL_EXCEPT 0
+
+#endif /* __or1k_hard_float__ */
+
 /* Type representing exception flags.  */
 typedef unsigned int fexcept_t;