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1da177e4 LT |
1 | /* $Id: visasm.h,v 1.5 2001/04/24 01:09:12 davem Exp $ */ |
2 | #ifndef _SPARC64_VISASM_H | |
3 | #define _SPARC64_VISASM_H | |
4 | ||
5 | /* visasm.h: FPU saving macros for VIS routines | |
6 | * | |
7 | * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) | |
8 | */ | |
9 | ||
10 | #include <asm/pstate.h> | |
11 | #include <asm/ptrace.h> | |
12 | ||
13 | /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */ | |
14 | ||
15 | #define VISEntry \ | |
16 | rd %fprs, %o5; \ | |
17 | andcc %o5, (FPRS_FEF|FPRS_DU), %g0; \ | |
18 | be,pt %icc, 297f; \ | |
19 | sethi %hi(297f), %g7; \ | |
20 | sethi %hi(VISenter), %g1; \ | |
21 | jmpl %g1 + %lo(VISenter), %g0; \ | |
22 | or %g7, %lo(297f), %g7; \ | |
23 | 297: wr %g0, FPRS_FEF, %fprs; \ | |
24 | ||
25 | #define VISExit \ | |
26 | wr %g0, 0, %fprs; | |
27 | ||
28 | /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc. | |
29 | * Must preserve %o5 between VISEntryHalf and VISExitHalf */ | |
30 | ||
31 | #define VISEntryHalf \ | |
32 | rd %fprs, %o5; \ | |
33 | andcc %o5, FPRS_FEF, %g0; \ | |
34 | be,pt %icc, 297f; \ | |
35 | sethi %hi(298f), %g7; \ | |
36 | sethi %hi(VISenterhalf), %g1; \ | |
37 | jmpl %g1 + %lo(VISenterhalf), %g0; \ | |
38 | or %g7, %lo(298f), %g7; \ | |
39 | clr %o5; \ | |
40 | 297: wr %o5, FPRS_FEF, %fprs; \ | |
41 | 298: | |
42 | ||
43 | #define VISExitHalf \ | |
44 | wr %o5, 0, %fprs; | |
45 | ||
46 | #ifndef __ASSEMBLY__ | |
47 | static __inline__ void save_and_clear_fpu(void) { | |
48 | __asm__ __volatile__ ( | |
49 | " rd %%fprs, %%o5\n" | |
50 | " andcc %%o5, %0, %%g0\n" | |
51 | " be,pt %%icc, 299f\n" | |
52 | " sethi %%hi(298f), %%g7\n" | |
53 | " sethi %%hi(VISenter), %%g1\n" | |
54 | " jmpl %%g1 + %%lo(VISenter), %%g0\n" | |
55 | " or %%g7, %%lo(298f), %%g7\n" | |
56 | " 298: wr %%g0, 0, %%fprs\n" | |
57 | " 299:\n" | |
58 | " " : : "i" (FPRS_FEF|FPRS_DU) : | |
59 | "o5", "g1", "g2", "g3", "g7", "cc"); | |
60 | } | |
61 | #endif | |
62 | ||
63 | #endif /* _SPARC64_ASI_H */ |