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/* $Id: visasm.h,v 1.1.1.1 2004-04-15 03:00:53 phoenix Exp $ */

#ifndef _SPARC64_VISASM_H

#define _SPARC64_VISASM_H

/* visasm.h:  FPU saving macros for VIS routines

 *

 * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)

 */

#include <asm/pstate.h>

#include <asm/ptrace.h>

#define AOFF_task_fpregs        (((ASIZ_task) + (64 - 1)) & ~(64 - 1))

/* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */

#define VISEntry                                        \

        rd              %fprs, %o5;                     \

        andcc           %o5, (FPRS_FEF|FPRS_DU), %g0;   \

        be,pt           %icc, 297f;                     \

         sethi          %hi(297f), %g7;                 \

        sethi           %hi(VISenter), %g1;             \

        jmpl            %g1 + %lo(VISenter), %g0;       \

         or             %g7, %lo(297f), %g7;            \

297:    wr              %g0, FPRS_FEF, %fprs;           \

#define VISExit                                         \

        wr              %g0, 0, %fprs;

/* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc.

 * Must preserve %o5 between VISEntryHalf and VISExitHalf */

#define VISEntryHalf                                    \

        rd              %fprs, %o5;                     \

        andcc           %o5, FPRS_FEF, %g0;             \

        be,pt           %icc, 297f;                     \

         sethi          %hi(298f), %g7;                 \

        sethi           %hi(VISenterhalf), %g1;         \

        jmpl            %g1 + %lo(VISenterhalf), %g0;   \

         or             %g7, %lo(298f), %g7;            \

        clr             %o5;                            \

297:    wr              %o5, FPRS_FEF, %fprs;           \

298:

#define VISExitHalf                                     \

        wr              %o5, 0, %fprs;

#ifndef __ASSEMBLY__    

extern __inline__ void save_and_clear_fpu(void) {

        __asm__ __volatile__ (

"               rd %%fprs, %%o5\n"

"               andcc %%o5, %0, %%g0\n"

"               be,pt %%icc, 299f\n"

"                sethi %%hi(298f), %%g7\n"

"               sethi %%hi(VISenter), %%g1\n"

"               jmpl %%g1 + %%lo(VISenter), %%g0\n"

"                or %%g7, %%lo(298f), %%g7\n"

"       298:    wr %%g0, 0, %%fprs\n"

"       299:\n"

"               " : : "i" (FPRS_FEF|FPRS_DU) :

                "o5", "g1", "g2", "g3", "g7", "cc");

}

#endif

#endif /* _SPARC64_ASI_H */