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1 | #ifndef _SPARC64_VISASM_H |
2 | #define _SPARC64_VISASM_H | |
3 | ||
4 | /* visasm.h: FPU saving macros for VIS routines | |
5 | * | |
6 | * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) | |
7 | */ | |
8 | ||
9 | #include <asm/pstate.h> | |
10 | #include <asm/ptrace.h> | |
11 | ||
12 | /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */ | |
13 | ||
14 | #define VISEntry \ | |
15 | rd %fprs, %o5; \ | |
16 | andcc %o5, (FPRS_FEF|FPRS_DU), %g0; \ | |
17 | be,pt %icc, 297f; \ | |
18 | sethi %hi(297f), %g7; \ | |
19 | sethi %hi(VISenter), %g1; \ | |
20 | jmpl %g1 + %lo(VISenter), %g0; \ | |
21 | or %g7, %lo(297f), %g7; \ | |
22 | 297: wr %g0, FPRS_FEF, %fprs; \ | |
23 | ||
24 | #define VISExit \ | |
25 | wr %g0, 0, %fprs; | |
26 | ||
27 | /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc. | |
28 | * Must preserve %o5 between VISEntryHalf and VISExitHalf */ | |
29 | ||
30 | #define VISEntryHalf \ | |
44922150 DM |
31 | VISEntry |
32 | ||
33 | #define VISExitHalf \ | |
34 | VISExit | |
a00736e9 | 35 | |
f4da3628 DM |
36 | #define VISEntryHalfFast(fail_label) \ |
37 | rd %fprs, %o5; \ | |
38 | andcc %o5, FPRS_FEF, %g0; \ | |
39 | be,pt %icc, 297f; \ | |
40 | nop; \ | |
41 | ba,a,pt %xcc, fail_label; \ | |
42 | 297: wr %o5, FPRS_FEF, %fprs; | |
43 | ||
44922150 | 44 | #define VISExitHalfFast \ |
a00736e9 SR |
45 | wr %o5, 0, %fprs; |
46 | ||
47 | #ifndef __ASSEMBLY__ | |
48 | static inline void save_and_clear_fpu(void) { | |
49 | __asm__ __volatile__ ( | |
50 | " rd %%fprs, %%o5\n" | |
51 | " andcc %%o5, %0, %%g0\n" | |
52 | " be,pt %%icc, 299f\n" | |
53 | " sethi %%hi(298f), %%g7\n" | |
54 | " sethi %%hi(VISenter), %%g1\n" | |
55 | " jmpl %%g1 + %%lo(VISenter), %%g0\n" | |
56 | " or %%g7, %%lo(298f), %%g7\n" | |
57 | " 298: wr %%g0, 0, %%fprs\n" | |
58 | " 299:\n" | |
59 | " " : : "i" (FPRS_FEF|FPRS_DU) : | |
60 | "o5", "g1", "g2", "g3", "g7", "cc"); | |
61 | } | |
f05a6865 SR |
62 | |
63 | int vis_emul(struct pt_regs *, unsigned int); | |
a00736e9 SR |
64 | #endif |
65 | ||
66 | #endif /* _SPARC64_ASI_H */ |