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- attempt to add streflop to win64 build

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- CRAZY attempt to add x64 (win64) support to streflop via some new asm code!
This commit is contained in:
SoftCoder
2014-02-01 01:28:30 -08:00
parent 6542ae5110
commit 78ed6d4601
6 changed files with 295 additions and 10 deletions
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22
source/shared_lib/include/streflop/FPUSettings.h
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@@ -133,15 +133,37 @@ enum FPU_RoundMode {
// plan for portability
#if defined(_MSC_VER)
#if _WIN64
/* No fldcw intrinsics on Windows x64, punt to external asm */
extern "C" { void streflop_winx64_fldcw(unsigned int mode); }
extern "C" { unsigned int streflop_winx64_fstcw(); }
extern "C" { void streflop_winx64_fclex(void); }
extern "C" { void streflop_winx64_stmxcsr(unsigned int mode); }
extern "C" { void streflop_winx64_ldmxcsr(unsigned int mode); }
#define STREFLOP_FSTCW(cw) do { int tmp = 0; tmp = streflop_winx64_fstcw(); (cw) = tmp; } while (0)
#define STREFLOP_FLDCW(cw) do { int tmp = (cw); streflop_winx64_fldcw(tmp); } while (0)
#define STREFLOP_STMXCSR(cw) do { int tmp = 0; streflop_winx64_stmxcsr(tmp); (cw) = tmp; } while (0)
#define STREFLOP_LDMXCSR(cw) do { int tmp = (cw); streflop_winx64_ldmxcsr(tmp); } while (0)
#else
#define STREFLOP_FSTCW(cw) do { short tmp; __asm { fstcw tmp }; (cw) = tmp; } while (0)
#define STREFLOP_FLDCW(cw) do { short tmp = (cw); __asm { fclex }; __asm { fldcw tmp }; } while (0)
#define STREFLOP_STMXCSR(cw) do { int tmp; __asm { stmxcsr tmp }; (cw) = tmp; } while (0)
#define STREFLOP_LDMXCSR(cw) do { int tmp = (cw); __asm { ldmxcsr tmp }; } while (0)
#endif
#else // defined(_MSC_VER)
#define STREFLOP_FSTCW(cw) do { asm volatile ("fstcw %0" : "=m" (cw) : ); } while (0)
#define STREFLOP_FLDCW(cw) do { asm volatile ("fclex \n fldcw %0" : : "m" (cw)); } while (0)
#define STREFLOP_STMXCSR(cw) do { asm volatile ("stmxcsr %0" : "=m" (cw) : ); } while (0)
#define STREFLOP_LDMXCSR(cw) do { asm volatile ("ldmxcsr %0" : : "m" (cw) ); } while (0)
#endif // defined(_MSC_VER)
// Subset of all C99 functions

64
source/shared_lib/sources/streflop/FPUSettings.asm Normal file
View File

@@ -0,0 +1,64 @@
;
; Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
_text SEGMENT
; %ifidn __OUTPUT_FORMAT__,x64
; %ifdef _WIN64
streflop_winx64_fclex PROC FRAME
fclex
.endprolog
ret
streflop_winx64_fclex ENDP
streflop_winx64_fldcw PROC FRAME
fclex
mov qword ptr [rsp + 8], rcx
.ENDPROLOG
ldmxcsr [rsp + 8]
ret
streflop_winx64_fldcw ENDP
streflop_winx64_fstcw PROC FRAME
sub rsp, 8
.ENDPROLOG
stmxcsr [rsp]
mov rax, [rsp]
add rsp, 8
ret
streflop_winx64_fstcw ENDP
streflop_winx64_stmxcsr PROC FRAME
sub rsp, 8
.ENDPROLOG
stmxcsr [rsp]
mov rax, [rsp]
add rsp, 8
ret
streflop_winx64_stmxcsr ENDP
streflop_winx64_ldmxcsr PROC FRAME
sub rsp, 8
.ENDPROLOG
ldmxcsr [rsp]
mov rax, [rsp]
add rsp, 8
ret
streflop_winx64_ldmxcsr ENDP
;%endif
end