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/* $Id: visasm.h,v 1.4 1999/04/19 01:25:55 davem 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; \
ba,pt %xcc, VISenter; \
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; \
ba,pt %xcc, VISenterhalf; \
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
andcc %%o5, %0, %%g0
be,pt %%icc, 299f
sethi %%hi(298f), %%g7
ba VISenter ! Note. This cannot be bp, as it may be too far from VISenter.
or %%g7, %%lo(298f), %%g7
298: wr %%g0, 0, %%fprs
299:
" : : "i" (FPRS_FEF|FPRS_DU) :
"o5", "g1", "g2", "g3", "g7", "cc");
}
#endif
#endif /* _SPARC64_ASI_H */
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