68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _SPARC64_VISASM_H
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#define _SPARC64_VISASM_H
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/* visasm.h: FPU saving macros for VIS routines
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*
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* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
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*/
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#include <asm/pstate.h>
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#include <asm/ptrace.h>
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/* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */
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#define VISEntry \
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rd %fprs, %o5; \
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andcc %o5, (FPRS_FEF|FPRS_DU), %g0; \
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be,pt %icc, 297f; \
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sethi %hi(297f), %g7; \
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sethi %hi(VISenter), %g1; \
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jmpl %g1 + %lo(VISenter), %g0; \
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or %g7, %lo(297f), %g7; \
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297: wr %g0, FPRS_FEF, %fprs; \
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#define VISExit \
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wr %g0, 0, %fprs;
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/* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc.
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* Must preserve %o5 between VISEntryHalf and VISExitHalf */
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#define VISEntryHalf \
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VISEntry
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#define VISExitHalf \
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VISExit
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#define VISEntryHalfFast(fail_label) \
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rd %fprs, %o5; \
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andcc %o5, FPRS_FEF, %g0; \
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be,pt %icc, 297f; \
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nop; \
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ba,a,pt %xcc, fail_label; \
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297: wr %o5, FPRS_FEF, %fprs;
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#define VISExitHalfFast \
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wr %o5, 0, %fprs;
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#ifndef __ASSEMBLY__
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static inline void save_and_clear_fpu(void) {
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__asm__ __volatile__ (
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" rd %%fprs, %%o5\n"
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" andcc %%o5, %0, %%g0\n"
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" be,pt %%icc, 299f\n"
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" sethi %%hi(298f), %%g7\n"
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" sethi %%hi(VISenter), %%g1\n"
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" jmpl %%g1 + %%lo(VISenter), %%g0\n"
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" or %%g7, %%lo(298f), %%g7\n"
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" 298: wr %%g0, 0, %%fprs\n"
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" 299:\n"
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" " : : "i" (FPRS_FEF|FPRS_DU) :
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"o5", "g1", "g2", "g3", "g7", "cc");
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}
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int vis_emul(struct pt_regs *, unsigned int);
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#endif
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#endif /* _SPARC64_ASI_H */
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