| /* $Id: visasm.h,v 1.5 2001/04/24 01:09:12 davem Exp $ */ |
| #ifndef _SPARC64_VISASM_H |
| #define _SPARC64_VISASM_H |
| |
| /* visasm.h: FPU saving macros for VIS routines |
| * |
| * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) |
| */ |
| |
| #include <asm/pstate.h> |
| #include <asm/ptrace.h> |
| |
| /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */ |
| |
| #define VISEntry \ |
| rd %fprs, %o5; \ |
| andcc %o5, (FPRS_FEF|FPRS_DU), %g0; \ |
| be,pt %icc, 297f; \ |
| sethi %hi(297f), %g7; \ |
| sethi %hi(VISenter), %g1; \ |
| jmpl %g1 + %lo(VISenter), %g0; \ |
| or %g7, %lo(297f), %g7; \ |
| 297: wr %g0, FPRS_FEF, %fprs; \ |
| |
| #define VISExit \ |
| wr %g0, 0, %fprs; |
| |
| /* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc. |
| * Must preserve %o5 between VISEntryHalf and VISExitHalf */ |
| |
| #define VISEntryHalf \ |
| rd %fprs, %o5; \ |
| andcc %o5, FPRS_FEF, %g0; \ |
| be,pt %icc, 297f; \ |
| sethi %hi(298f), %g7; \ |
| sethi %hi(VISenterhalf), %g1; \ |
| jmpl %g1 + %lo(VISenterhalf), %g0; \ |
| or %g7, %lo(298f), %g7; \ |
| clr %o5; \ |
| 297: wr %o5, FPRS_FEF, %fprs; \ |
| 298: |
| |
| #define VISExitHalf \ |
| wr %o5, 0, %fprs; |
| |
| #ifndef __ASSEMBLY__ |
| static __inline__ void save_and_clear_fpu(void) { |
| __asm__ __volatile__ ( |
| " rd %%fprs, %%o5\n" |
| " andcc %%o5, %0, %%g0\n" |
| " be,pt %%icc, 299f\n" |
| " sethi %%hi(298f), %%g7\n" |
| " sethi %%hi(VISenter), %%g1\n" |
| " jmpl %%g1 + %%lo(VISenter), %%g0\n" |
| " or %%g7, %%lo(298f), %%g7\n" |
| " 298: wr %%g0, 0, %%fprs\n" |
| " 299:\n" |
| " " : : "i" (FPRS_FEF|FPRS_DU) : |
| "o5", "g1", "g2", "g3", "g7", "cc"); |
| } |
| #endif |
| |
| #endif /* _SPARC64_ASI_H */ |