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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 ([email protected])
- */
- #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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