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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 */
|
|
