1/* $Id: visasm.h,v 1.1.1.1 2008/10/15 03:27:27 james26_jang 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#define AOFF_task_fpregs (((ASIZ_task) + (64 - 1)) & ~(64 - 1)) 14 15/* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */ 16 17#define VISEntry \ 18 rd %fprs, %o5; \ 19 andcc %o5, (FPRS_FEF|FPRS_DU), %g0; \ 20 be,pt %icc, 297f; \ 21 sethi %hi(297f), %g7; \ 22 ba,pt %xcc, VISenter; \ 23 or %g7, %lo(297f), %g7; \ 24297: wr %g0, FPRS_FEF, %fprs; \ 25 26#define VISExit \ 27 wr %g0, 0, %fprs; 28 29/* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc. 30 * Must preserve %o5 between VISEntryHalf and VISExitHalf */ 31 32#define VISEntryHalf \ 33 rd %fprs, %o5; \ 34 andcc %o5, FPRS_FEF, %g0; \ 35 be,pt %icc, 297f; \ 36 sethi %hi(298f), %g7; \ 37 ba,pt %xcc, VISenterhalf; \ 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__ 47extern __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" ba VISenter ! Note. This cannot be bp, as it may be too far from VISenter.\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} 60#endif 61 62#endif /* _SPARC64_ASI_H */ 63