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bca718 |
commit c95b3011018893fcc473279768a67a24a73bbef2
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
Author: Wilco <wdijkstr@arm.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
Date: Mon Jun 2 12:20:17 2014 +0100
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
[AArch64] Rewrite feupdateenv (BZ 17009).
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
diff --git a/ports/sysdeps/aarch64/fpu/feupdateenv.c b/ports/sysdeps/aarch64/fpu/feupdateenv.c
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
index 6d64a9b..ac2f6fe 100644
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
--- a/ports/sysdeps/aarch64/fpu/feupdateenv.c
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+++ b/ports/sysdeps/aarch64/fpu/feupdateenv.c
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
@@ -22,16 +22,65 @@
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
int
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
feupdateenv (const fenv_t *envp)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
{
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ fpu_control_t fpcr;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ fpu_control_t fpcr_new;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ fpu_control_t updated_fpcr;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
fpu_fpsr_t fpsr;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ fpu_fpsr_t fpsr_new;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ int excepts;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
- /* Get the current exception state. */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ _FPU_GETCW (fpcr);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
_FPU_GETFPSR (fpsr);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ excepts = fpsr & FE_ALL_EXCEPT;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
- /* Install new environment. */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
- fesetenv (envp);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ if ((envp != FE_DFL_ENV) && (envp != FE_NOMASK_ENV))
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ fpcr_new = envp->__fpcr;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ fpsr_new = envp->__fpsr | excepts;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
- /* Raise the saved exceptions. */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
- feraiseexcept (fpsr & FE_ALL_EXCEPT);
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bca718 |
+ if (fpcr != fpcr_new)
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bca718 |
+ _FPU_SETCW (fpcr_new);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ if (fpsr != fpsr_new)
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bca718 |
+ _FPU_SETFPSR (fpsr_new);
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bca718 |
+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ if (excepts & (fpcr_new >> FE_EXCEPT_SHIFT))
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bca718 |
+ return feraiseexcept (excepts);
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bca718 |
+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ return 0;
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bca718 |
+ }
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bca718 |
+
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bca718 |
+ fpcr_new = fpcr & _FPU_RESERVED;
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bca718 |
+ fpsr_new = fpsr & (_FPU_FPSR_RESERVED | FE_ALL_EXCEPT);
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bca718 |
+
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bca718 |
+ if (envp == FE_DFL_ENV)
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bca718 |
+ {
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bca718 |
+ fpcr_new |= _FPU_DEFAULT;
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bca718 |
+ fpsr_new |= _FPU_FPSR_DEFAULT;
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bca718 |
+ }
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ else
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bca718 |
+ {
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bca718 |
+ fpcr_new |= _FPU_FPCR_IEEE;
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bca718 |
+ fpsr_new |= _FPU_FPSR_IEEE;
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bca718 |
+ }
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+
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bca718 |
+ _FPU_SETFPSR (fpsr_new);
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bca718 |
+
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bca718 |
+ if (fpcr != fpcr_new)
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bca718 |
+ {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ _FPU_SETCW (fpcr_new);
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bca718 |
+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
+ /* Trapping exceptions are optional in AArch64; the relevant enable
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bca718 |
+ bits in FPCR are RES0 hence the absence of support can be detected
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bca718 |
+ by reading back the FPCR and comparing with the required value. */
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bca718 |
+ _FPU_GETCW (updated_fpcr);
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bca718 |
+
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bca718 |
+ if (fpcr_new & ~updated_fpcr)
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bca718 |
+ return 1;
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bca718 |
+ }
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bca718 |
+
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bca718 |
+ if (excepts & (fpcr_new >> FE_EXCEPT_SHIFT))
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bca718 |
+ return feraiseexcept (excepts);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
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bca718 |
return 0;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
bca718 |
}
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