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-rw-r--r--src/fenv/s390x/fenv.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/fenv/s390x/fenv.c b/src/fenv/s390x/fenv.c
new file mode 100644
index 00000000..9a3488d7
--- /dev/null
+++ b/src/fenv/s390x/fenv.c
@@ -0,0 +1,55 @@
+#include <fenv.h>
+
+static inline unsigned get_fpc(void)
+{
+ unsigned fpc;
+ __asm__ __volatile__("efpc %0" : "=r"(fpc));
+ return fpc;
+}
+
+static inline void set_fpc(unsigned fpc)
+{
+ __asm__ __volatile__("sfpc %0" :: "r"(fpc));
+}
+
+int feclearexcept(int mask)
+{
+ mask &= FE_ALL_EXCEPT;
+ set_fpc(get_fpc() & ~mask);
+ return 0;
+}
+
+int feraiseexcept(int mask)
+{
+ mask &= FE_ALL_EXCEPT;
+ set_fpc(get_fpc() | mask);
+ return 0;
+}
+
+int fetestexcept(int mask)
+{
+ return get_fpc() & mask & FE_ALL_EXCEPT;
+}
+
+int fegetround(void)
+{
+ return get_fpc() & 3;
+}
+
+int __fesetround(int r)
+{
+ set_fpc(get_fpc() & ~3L | r);
+ return 0;
+}
+
+int fegetenv(fenv_t *envp)
+{
+ *envp = get_fpc();
+ return 0;
+}
+
+int fesetenv(const fenv_t *envp)
+{
+ set_fpc(envp != FE_DFL_ENV ? *envp : 0);
+ return 0;
+}