152 lines
4.1 KiB
ArmAsm
152 lines
4.1 KiB
ArmAsm
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// TITLE("Register Save and Restore")
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//++
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//
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// Copyright (c) 1990 Microsoft Corporation
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//
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// Module Name:
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//
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// xxregsv.s
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//
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// Abstract:
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//
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// This module implements the code necessary to save and restore processor
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// registers during exception and interrupt processing.
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//
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// Author:
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//
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// David N. Cutler (davec) 12-Aug-1990
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//
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// Environment:
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//
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// Kernel mode only.
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//
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// Revision History:
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//
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//--
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#include "ksmips.h"
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SBTTL("Save Volatile Floating Registers")
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//++
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//
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// Routine Desription:
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//
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// This routine is called to save the volatile floating registers.
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//
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// N.B. This routine uses a special argument passing mechanism and destroys
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// no registers. It is assumed that floating register f0 is saved by the
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// caller.
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//
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// Arguments:
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//
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// s8 - Supplies a pointer to a trap frame.
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//
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// Return Value:
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//
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// None.
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//
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//--
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LEAF_ENTRY(KiSaveVolatileFloatState)
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.set noreorder
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.set noat
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#if defined(_EXTENDED_FLOAT)
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sdc1 f1,TrDblF1(s8) // save odd floating registers
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sdc1 f3,TrDblF3(s8) //
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sdc1 f5,TrDblF5(s8) //
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sdc1 f7,TrDblF7(s8) //
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sdc1 f9,TrDblF9(s8) //
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sdc1 f11,TrDblF11(s8) //
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sdc1 f13,TrDblF13(s8) //
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sdc1 f15,TrDblF15(s8) //
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sdc1 f17,TrDblF17(s8) //
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sdc1 f19,TrDblF19(s8) //
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sdc1 f21,TrDblF21(s8) //
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sdc1 f23,TrDblF23(s8) //
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sdc1 f25,TrDblF25(s8) //
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sdc1 f27,TrDblF27(s8) //
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sdc1 f29,TrDblF29(s8) //
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sdc1 f31,TrDblF31(s8) //
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#endif
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sdc1 f2,TrFltF2(s8) // save even floating registers
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sdc1 f4,TrFltF4(s8) //
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sdc1 f6,TrFltF6(s8) //
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sdc1 f8,TrFltF8(s8) //
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sdc1 f10,TrFltF10(s8) //
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sdc1 f12,TrFltF12(s8) //
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sdc1 f14,TrFltF14(s8) //
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sdc1 f16,TrFltF16(s8) //
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j ra // return
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sdc1 f18,TrFltF18(s8) //
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.set at
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.set reorder
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.end KiSaveVolatileFloatState)
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SBTTL("Restore Volatile Floating Registers")
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//++
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//
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// Routine Desription:
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//
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// This routine is called to restore the volatile floating registers.
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//
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// N.B. This routine uses a special argument passing mechanism and destroys
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// no registers. It is assumed that floating register f0 is restored by
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// the caller.
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//
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// Arguments:
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//
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// s8 - Supplies a pointer to a trap frame.
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//
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// Return Value:
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//
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// None.
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//
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//--
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LEAF_ENTRY(KiRestoreVolatileFloatState)
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.set noreorder
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.set noat
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#if defined(_EXTENDED_FLOAT)
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ldc1 f1,TrDblF1(s8) // save odd floating registers
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ldc1 f3,TrDblF3(s8) //
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ldc1 f5,TrDblF5(s8) //
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ldc1 f7,TrDblF7(s8) //
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ldc1 f9,TrDblF9(s8) //
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ldc1 f11,TrDblF11(s8) //
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ldc1 f13,TrDblF13(s8) //
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ldc1 f15,TrDblF15(s8) //
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ldc1 f17,TrDblF17(s8) //
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ldc1 f19,TrDblF19(s8) //
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ldc1 f21,TrDblF21(s8) //
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ldc1 f23,TrDblF23(s8) //
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ldc1 f25,TrDblF25(s8) //
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ldc1 f27,TrDblF27(s8) //
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ldc1 f29,TrDblF29(s8) //
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ldc1 f31,TrDblF31(s8) //
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#endif
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ldc1 f2,TrFltF2(s8) // restore floating registers f2 - f19
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ldc1 f4,TrFltF4(s8) //
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ldc1 f6,TrFltF6(s8) //
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ldc1 f8,TrFltF8(s8) //
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ldc1 f10,TrFltF10(s8) //
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ldc1 f12,TrFltF12(s8) //
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ldc1 f14,TrFltF14(s8) //
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ldc1 f16,TrFltF16(s8) //
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j ra // return
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ldc1 f18,TrFltF18(s8) //
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.set at
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.set reorder
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.end KiRestoreVolatileFloatState
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