[PATCH 1/3] ntdll/tests: Add SIMD exception test for floating point invalid operation fault (try 4).

[Qian Hong]

Try 4:
- Restore old value in a more context independent way.

Try 3:
- Correctly revert side effect of previous ldmxcsr, change 0x200 to 
0x80, 0x80 & 0xff7f = 0, 0x200 & 0xfdff = 0.

Try 2:
- Fix a typo in comment. (Thanks Sebastian)

Signed-off-by: Qian Hong <qhong at codeweavers.com>
---
  dlls/ntdll/tests/exception.c | 57 
+++++++++++++++++++++++++++++++-------------
  1 file changed, 41 insertions(+), 16 deletions(-)


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