68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#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>
|
|
|
|
/* 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 \
|
|
VISEntry
|
|
|
|
#define VISExitHalf \
|
|
VISExit
|
|
|
|
#define VISEntryHalfFast(fail_label) \
|
|
rd %fprs, %o5; \
|
|
andcc %o5, FPRS_FEF, %g0; \
|
|
be,pt %icc, 297f; \
|
|
nop; \
|
|
ba,a,pt %xcc, fail_label; \
|
|
297: wr %o5, FPRS_FEF, %fprs;
|
|
|
|
#define VISExitHalfFast \
|
|
wr %o5, 0, %fprs;
|
|
|
|
#ifndef __ASSEMBLY__
|
|
static 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");
|
|
}
|
|
|
|
int vis_emul(struct pt_regs *, unsigned int);
|
|
#endif
|
|
|
|
#endif /* _SPARC64_ASI_H */
|