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/* 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 */
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