RISC-V: Fix rounding save/restore bug.

* sysdeps/riscv/rvf/math_private.h (libc_feholdexcept_setround_riscv):
Fix rounding save-restore bug.

Fixes about a hundred off-by-ULP failures in the math testsuite.

(cherry picked from commit bf4181878780be9b53e37a3b0fbabc40cdd07649)

diff --git a/ChangeLog b/ChangeLog
index d900e1eba18d39a5a24c6eaee33b6514a14def00..b1cba70bc4b11a7998e398536cbf2bdc9d02043b 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-08-03  DJ Delorie  <dj@redhat.com>
+
+       * sysdeps/riscv/rvf/math_private.h (libc_feholdexcept_setround_riscv):
+       Fix rounding save-restore bug.
+
 2018-08-14  Florian Weimer  <fweimer@redhat.com>
 
        [BZ #23521]

diff --git a/sysdeps/riscv/rvf/math_private.h b/sysdeps/riscv/rvf/math_private.h
index cdb7858fc8ce9a129bde4918e44b1dfb5cb91d3d..ca587620cb36bb1b519ea49da428853e9a466c4f 100644 (file)
--- a/sysdeps/riscv/rvf/math_private.h
+++ b/sysdeps/riscv/rvf/math_private.h
@@ -72,8 +72,8 @@ libc_fesetround_riscv (int round)
 static __always_inline void
 libc_feholdexcept_setround_riscv (fenv_t *envp, int round)
 {
-  libc_fesetround_riscv (round);
   libc_feholdexcept_riscv (envp);
+  libc_fesetround_riscv (round);
 }
 
 #define libc_feholdexcept_setround  libc_feholdexcept_setround_riscv