Piotr Caban : msvcrt: Add fesetenv implementation.
Alexandre Julliard
julliard at winehq.org
Thu Apr 20 12:35:11 CDT 2017
Module: wine
Branch: stable
Commit: f4a36c9e6c09e1648b7bc9a96391fe9c981e29f5
URL: http://source.winehq.org/git/wine.git/?a=commit;h=f4a36c9e6c09e1648b7bc9a96391fe9c981e29f5
Author: Piotr Caban <piotr at codeweavers.com>
Date: Tue Feb 7 17:42:43 2017 +0100
msvcrt: Add fesetenv implementation.
Signed-off-by: Piotr Caban <piotr at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
(cherry picked from commit 98a0c3df2e640fba5312acbeb07fd527e9c24b5e)
Signed-off-by: Michael Stefaniuc <mstefani at winehq.org>
---
dlls/msvcrt/math.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 60 insertions(+), 1 deletion(-)
diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index 94b507c..921785d 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -1272,8 +1272,67 @@ void CDECL _fpreset(void)
*/
int CDECL MSVCRT_fesetenv(const MSVCRT_fenv_t *env)
{
- FIXME("(%p) stub\n", env);
+#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+ struct {
+ WORD control_word;
+ WORD unused1;
+ WORD status_word;
+ WORD unused2;
+ WORD tag_word;
+ WORD unused3;
+ DWORD instruction_pointer;
+ WORD code_segment;
+ WORD unused4;
+ DWORD operand_addr;
+ WORD data_segment;
+ WORD unused5;
+ } fenv;
+
+ TRACE( "(%p)\n", env );
+
+ if (!env->control && !env->status) {
+ _fpreset();
+ return 0;
+ }
+
+ __asm__ __volatile__( "fnstenv %0" : "=m" (fenv) );
+
+ fenv.control_word &= ~0x3d;
+ if (env->control & MSVCRT__EM_INVALID) fenv.control_word |= 0x1;
+ if (env->control & MSVCRT__EM_ZERODIVIDE) fenv.control_word |= 0x4;
+ if (env->control & MSVCRT__EM_OVERFLOW) fenv.control_word |= 0x8;
+ if (env->control & MSVCRT__EM_UNDERFLOW) fenv.control_word |= 0x10;
+ if (env->control & MSVCRT__EM_INEXACT) fenv.control_word |= 0x20;
+
+ fenv.status_word &= ~0x3d;
+ if (env->status & MSVCRT__SW_INVALID) fenv.status_word |= 0x1;
+ if (env->status & MSVCRT__SW_ZERODIVIDE) fenv.status_word |= 0x4;
+ if (env->status & MSVCRT__SW_OVERFLOW) fenv.status_word |= 0x8;
+ if (env->status & MSVCRT__SW_UNDERFLOW) fenv.status_word |= 0x10;
+ if (env->status & MSVCRT__SW_INEXACT) fenv.status_word |= 0x20;
+
+ __asm__ __volatile__( "fldenv %0" : : "m" (fenv) : "st", "st(1)",
+ "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)" );
+
+ if (sse2_supported)
+ {
+ DWORD fpword;
+
+ __asm__ __volatile__( "stmxcsr %0" : "=m" (fpword) );
+ fpword &= ~0x1e80;
+ if (env->control & MSVCRT__EM_INVALID) fpword |= 0x80;
+ if (env->control & MSVCRT__EM_ZERODIVIDE) fpword |= 0x200;
+ if (env->control & MSVCRT__EM_OVERFLOW) fpword |= 0x400;
+ if (env->control & MSVCRT__EM_UNDERFLOW) fpword |= 0x800;
+ if (env->control & MSVCRT__EM_INEXACT) fpword |= 0x1000;
+ __asm__ __volatile__( "ldmxcsr %0" : : "m" (fpword) );
+ }
+
return 0;
+#else
+ FIXME( "not implemented\n" );
+#endif
+ return 1;
}
/*********************************************************************
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