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st/nine: Change x86 FPU Control word on device creation

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As on wined3d and windows, when D3DCREATE_FPU_PRESERVE is not
specified, change the fpu control word to all exceptions masked,
single precision, round to nearest.

Signed-off-by: Axel Davy <axel.davy@ens.fr>
Signed-off-by: Tiziano Bacocco <tizbac2@gmail.com>
This commit is contained in:
Tiziano Bacocco 2015-01-25 12:15:39 +01:00 • committed by Axel Davy
parent e7b1a1e57c
commit 31bb4cd5c6
1 changed files with 31 additions and 0 deletions
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31
src/gallium/state_trackers/nine/device9.c
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@ -41,6 +41,7 @@
#include "pipe/p_screen.h"
#include "pipe/p_context.h"
#include "pipe/p_config.h"
#include "util/u_math.h"
#include "util/u_inlines.h"
#include "util/u_hash_table.h"
@ -53,6 +54,33 @@
#define DBG_CHANNEL DBG_DEVICE
#if defined(PIPE_CC_GCC) && (defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64))
#include <fpu_control.h>
static void nine_setup_fpu()
{
fpu_control_t c;
_FPU_GETCW(c);
/* clear the control word */
c &= _FPU_RESERVED;
/* d3d9 doc/wine tests: mask all exceptions, use single-precision
* and round to nearest */
c |= _FPU_MASK_IM | _FPU_MASK_DM | _FPU_MASK_ZM | _FPU_MASK_OM |
_FPU_MASK_UM | _FPU_MASK_PM | _FPU_SINGLE | _FPU_RC_NEAREST;
_FPU_SETCW(c);
}
#else
static void nine_setup_fpu(void)
{
WARN_ONCE("FPU setup not supported on non-x86 platforms\n");
}
#endif
static void
NineDevice9_SetDefaultState( struct NineDevice9 *This, boolean is_reset )
{
@ -168,6 +196,9 @@ NineDevice9_ctor( struct NineDevice9 *This,
IDirect3D9_AddRef(This->d3d9);
ID3DPresentGroup_AddRef(This->present);
if (!(This->params.BehaviorFlags & D3DCREATE_FPU_PRESERVE))
nine_setup_fpu();
This->pipe = This->screen->context_create(This->screen, NULL);
if (!This->pipe) { return E_OUTOFMEMORY; } /* guess */