projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| a00736e9 SR |
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 \ | |
| 31 | rd %fprs, %o5; \ | |
| 32 | andcc %o5, FPRS_FEF, %g0; \ | |
| 33 | be,pt %icc, 297f; \ | |
| 34 | sethi %hi(298f), %g7; \ | |
| 35 | sethi %hi(VISenterhalf), %g1; \ | |
| 36 | jmpl %g1 + %lo(VISenterhalf), %g0; \ | |
| 37 | or %g7, %lo(298f), %g7; \ | |
| 38 | clr %o5; \ | |
| 39 | 297: wr %o5, FPRS_FEF, %fprs; \ | |
| 40 | 298: | |
| 41 | ||
| 42 | #define VISExitHalf \ | |
| 43 | wr %o5, 0, %fprs; | |
| 44 | ||
| 45 | #ifndef __ASSEMBLY__ | |
| 46 | static inline void save_and_clear_fpu(void) { | |
| 47 | __asm__ __volatile__ ( | |
| 48 | " rd %%fprs, %%o5\n" | |
| 49 | " andcc %%o5, %0, %%g0\n" | |
| 50 | " be,pt %%icc, 299f\n" | |
| 51 | " sethi %%hi(298f), %%g7\n" | |
| 52 | " sethi %%hi(VISenter), %%g1\n" | |
| 53 | " jmpl %%g1 + %%lo(VISenter), %%g0\n" | |
| 54 | " or %%g7, %%lo(298f), %%g7\n" | |
| 55 | " 298: wr %%g0, 0, %%fprs\n" | |
| 56 | " 299:\n" | |
| 57 | " " : : "i" (FPRS_FEF|FPRS_DU) : | |
| 58 | "o5", "g1", "g2", "g3", "g7", "cc"); | |
| 59 | } | |
| f05a6865 SR |
60 | |
| 61 | int vis_emul(struct pt_regs *, unsigned int); | |
| a00736e9 SR |
62 | #endif |
| 63 | ||
| 64 | #endif /* _SPARC64_ASI_H */ |