| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |