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 VISEntry 32 33 #define VISExitHalf \ 34 VISExit 35 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 44 #define VISExitHalfFast \ 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 } 62 63 int vis_emul(struct pt_regs *, unsigned int); 64 #endif 65 66 #endif /* _SPARC64_ASI_H */ 67