120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
|
/**
|
||
|
|
*** Copyright (C) 1996-97 Intel Corporation. All rights reserved.
|
||
|
|
***
|
||
|
|
*** The information and source code contained herein is the exclusive
|
||
|
|
*** property of Intel Corporation and may not be disclosed, examined
|
||
|
|
*** or reproduced in whole or in part without explicit written authorization
|
||
|
|
*** from the company.
|
||
|
|
**/
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Copyright (c) 1996 Intel Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
floatem.c
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
|
||
|
|
This module implements IA64 machine dependent floating point emulation
|
||
|
|
functions to support the IEEE floating point standard.
|
||
|
|
|
||
|
|
Author:
|
||
|
|
|
||
|
|
Marius Cornea-Hasegan Sep-96
|
||
|
|
|
||
|
|
Environment:
|
||
|
|
|
||
|
|
Kernel mode only.
|
||
|
|
|
||
|
|
Revision History:
|
||
|
|
|
||
|
|
Modfied Jan. 97, Jan 98, Jun 98 (new API)
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#include "ki.h"
|
||
|
|
#include "ntfpia64.h"
|
||
|
|
#include "floatem.h"
|
||
|
|
|
||
|
|
|
||
|
|
extern LONG
|
||
|
|
HalFpEmulate (
|
||
|
|
ULONG trap_type,
|
||
|
|
BUNDLE *pBundle,
|
||
|
|
ULONGLONG *pipsr,
|
||
|
|
ULONGLONG *pfpsr,
|
||
|
|
ULONGLONG *pisr,
|
||
|
|
ULONGLONG *ppreds,
|
||
|
|
ULONGLONG *pifs,
|
||
|
|
FP_STATE *fp_state
|
||
|
|
);
|
||
|
|
|
||
|
|
|
||
|
|
#define ALL_FP_REGISTERS_SAVED 0xFFFFFFFFFFFFFFFFi64
|
||
|
|
|
||
|
|
int
|
||
|
|
fp_emulate (
|
||
|
|
int trap_type,
|
||
|
|
BUNDLE *pbundle,
|
||
|
|
EM_int64_t *pipsr,
|
||
|
|
EM_int64_t *pfpsr,
|
||
|
|
EM_int64_t *pisr,
|
||
|
|
EM_int64_t *ppreds,
|
||
|
|
EM_int64_t *pifs,
|
||
|
|
void *fp_state
|
||
|
|
)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Pointer to old Floating point state FLOATING_POINT_STATE
|
||
|
|
//
|
||
|
|
|
||
|
|
FLOATING_POINT_STATE *Ptr0FPState;
|
||
|
|
PKEXCEPTION_FRAME LocalExceptionFramePtr;
|
||
|
|
PKTRAP_FRAME LocalTrapFramePtr;
|
||
|
|
FP_STATE FpState;
|
||
|
|
KIRQL OldIrql;
|
||
|
|
BOOLEAN LessThanAPC;
|
||
|
|
int Status;
|
||
|
|
|
||
|
|
Ptr0FPState = (PFLOATING_POINT_STATE) fp_state;
|
||
|
|
|
||
|
|
LocalExceptionFramePtr = (PKEXCEPTION_FRAME) (Ptr0FPState->ExceptionFrame);
|
||
|
|
LocalTrapFramePtr = (PKTRAP_FRAME) (Ptr0FPState->TrapFrame);
|
||
|
|
|
||
|
|
FpState.bitmask_low64 = ALL_FP_REGISTERS_SAVED;
|
||
|
|
FpState.bitmask_high64 = ALL_FP_REGISTERS_SAVED;
|
||
|
|
|
||
|
|
(FLOAT128 *)FpState.fp_state_low_preserved = &(LocalExceptionFramePtr->FltS0);
|
||
|
|
(FLOAT128 *)FpState.fp_state_low_volatile = &(LocalTrapFramePtr->FltT0);
|
||
|
|
(FLOAT128 *)FpState.fp_state_high_preserved = &(LocalExceptionFramePtr->FltS4);
|
||
|
|
|
||
|
|
(FLOAT128 *)FpState.fp_state_high_volatile = (PFLOAT128)GET_HIGH_FLOATING_POINT_REGISTER_SAVEAREA(KeGetCurrentThread()->StackBase);
|
||
|
|
|
||
|
|
if (KeGetCurrentIrql() < APC_LEVEL) {
|
||
|
|
LessThanAPC = 1;
|
||
|
|
} else {
|
||
|
|
LessThanAPC = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (LessThanAPC) {
|
||
|
|
KeRaiseIrql (APC_LEVEL, &OldIrql);
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = HalFpEmulate(trap_type,
|
||
|
|
pbundle,
|
||
|
|
pipsr,
|
||
|
|
pfpsr,
|
||
|
|
pisr,
|
||
|
|
ppreds,
|
||
|
|
pifs,
|
||
|
|
&FpState
|
||
|
|
);
|
||
|
|
if (LessThanAPC) {
|
||
|
|
KeLowerIrql (OldIrql);
|
||
|
|
}
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|