1/* $Id: visasm.h,v 1.1.1.1 2007/08/03 18:53:37 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; \ 23297: 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; \ 40297: wr %o5, FPRS_FEF, %fprs; \ 41298: 42 43#define VISExitHalf \ 44 wr %o5, 0, %fprs; 45 46#ifndef __ASSEMBLY__ 47static __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 */ 64