[PATCH] Removed Soft float from MIPS

[Eshan dhawan]

This Patch removes Soft Float code from MIPS.
Instead It adds the soft float code from RISCV

Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
---
 .../machine/mips/machine/fenv-softfloat.h     | 55 +++++++------------
 newlib/libm/machine/mips/fenv.c               | 10 ----
 2 files changed, 21 insertions(+), 44 deletions(-)

diff --git a/newlib/libc/machine/mips/machine/fenv-softfloat.h b/newlib/libc/machine/mips/machine/fenv-softfloat.h
index cf13e73fc..7c8bc3a89 100644
--- a/newlib/libc/machine/mips/machine/fenv-softfloat.h
+++ b/newlib/libc/machine/mips/machine/fenv-softfloat.h
@@ -50,16 +50,11 @@
  * doesn't matter how you define them.
  */
 #include <errno.h>
-int __softfloat_float_exception_flags;
-int __softfloat_float_exception_mask;
-int __softfloat_float_rounding_mode;
-
 
 __fenv_static inline int
 feclearexcept(int excepts)
 {
 
-	__softfloat_float_exception_flags &= ~excepts;
 	return (0);
 }
 
@@ -67,16 +62,14 @@ __fenv_static inline int
 fegetexceptflag(fexcept_t *flagp, int excepts)
 {
 
-	*flagp = __softfloat_float_exception_flags & excepts;
 	return (0);
+
 }
 
 __fenv_static inline int
 fesetexceptflag(const fexcept_t *flagp, int excepts)
 {
 
-	__softfloat_float_exception_flags &= ~excepts;
-	__softfloat_float_exception_flags |= *flagp & excepts;
 	return (0);
 }
 
@@ -84,7 +77,7 @@ __fenv_static inline int
 feraiseexcept(int excepts)
 {
 
-return(excepts  ?  -ENOTSUP : 0 );
+	return( excepts != 0 );
 
 }
 
@@ -92,21 +85,25 @@ __fenv_static inline int
 fetestexcept(int excepts)
 {
 
-	return (__softfloat_float_exception_flags & excepts);
+	return (0);
 }
 
 __fenv_static inline int
 fegetround(void)
 {
 
-	return (__softfloat_float_rounding_mode);
+#ifdef FE_TONEAREST
+ 	return FE_TONEAREST;
+#else
+	return 0;
+#endif
+
 }
 
 __fenv_static inline int
 fesetround(int rounding_mode)
 {
 
-	__softfloat_float_rounding_mode = rounding_mode;
 	return (0);
 }
 
@@ -114,19 +111,13 @@ __fenv_static inline int
 fegetenv(fenv_t *envp)
 {
 
-	__set_env(*envp, __softfloat_float_exception_flags,
-	    __softfloat_float_exception_mask, __softfloat_float_rounding_mode);
 	return (0);
 }
 
 __fenv_static inline int
 feholdexcept(fenv_t *envp)
 {
-	fenv_t __env;
-
-	fegetenv(envp);
-	__softfloat_float_exception_flags = 0;
-	__softfloat_float_exception_mask = 0;
+
 	return (0);
 }
 
@@ -134,19 +125,19 @@ __fenv_static inline int
 fesetenv(const fenv_t *envp)
 {
 
-	__softfloat_float_exception_flags = __env_flags(*envp);
-	__softfloat_float_exception_mask = __env_mask(*envp);
-	__softfloat_float_rounding_mode = __env_round(*envp);
+
 	return (0);
 }
 
 __fenv_static inline int
 feupdateenv(const fenv_t *envp)
 {
-	int __oflags = __softfloat_float_exception_flags;
 
-	fesetenv(envp);
-	feraiseexcept(__oflags);
+#if defined FE_NOMASK_ENV && FE_ALL_EXCEPT != 0
+	  if (envp == FE_NOMASK_ENV)
+	      return 1;
+#endif
+
 	return (0);
 }
 
@@ -157,26 +148,22 @@ feupdateenv(const fenv_t *envp)
 __fenv_static inline int
 feenableexcept(int __mask)
 {
-	int __omask = __softfloat_float_exception_mask;
-
-	__softfloat_float_exception_mask |= __mask;
-	return (__omask);
+
+	return (0);
 }
 
 __fenv_static inline int
 fedisableexcept(int __mask)
 {
-	int __omask = __softfloat_float_exception_mask;
-
-	__softfloat_float_exception_mask &= ~__mask;
-	return (__omask);
+
+	return (0);
 }
 
 __fenv_static inline int
 fegetexcept(void)
 {
 
-	return (__softfloat_float_exception_mask);
+	return (0);
 }
 
 #endif /* __BSD_VISIBLE */
diff --git a/newlib/libm/machine/mips/fenv.c b/newlib/libm/machine/mips/fenv.c
index 6e4bb8f33..e2179eb20 100644
--- a/newlib/libm/machine/mips/fenv.c
+++ b/newlib/libm/machine/mips/fenv.c
@@ -44,20 +44,10 @@
  * this as a default environment.
  */
 
-
 #ifdef	__mips_soft_float
-#define __set_env(env, flags, mask, rnd) env = ((flags)                 \
-                                                | (mask)<<_FPUSW_SHIFT  \
-                                                | (rnd) << 24)
-#define __env_flags(env)                ((env) & FE_ALL_EXCEPT)
-#define __env_mask(env)                 (((env) >> _FPUSW_SHIFT)        \
-                                                & FE_ALL_EXCEPT)
-#define __env_round(env)                (((env) >> 24) & _ROUND_MASK)
 #include <machine/fenv-softfloat.h>
 #endif
 
-
-
 extern inline int feclearexcept(int excepts);
 extern inline int fegetexceptflag(fexcept_t *flagp, int excepts);
 extern inline int fesetexceptflag(const fexcept_t *flagp, int excepts);
-- 
2.17.1