1 /* $Id: VISsave.S,v 1.5 2001/03/08 22:08:51 davem Exp $
2 * VISsave.S: Code for saving FPU register state for
3 * VIS routines. One should not call this directly,
4 * but use macros provided in <asm/visasm.h>.
6 * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
11 #include <asm/ptrace.h>
12 #include <asm/visasm.h>
15 .globl VISenter, VISenterhalf
17 /* On entry: %o5=current FPRS value, %g7 is callers address */
18 /* May clobber %o5, %g1, %g2, %g3, %g7, %icc, %xcc */
22 ldub [%g6 + AOFF_task_thread + AOFF_thread_fpdepth], %g1
25 stb %g0, [%g6 + AOFF_task_thread + AOFF_thread_fpsaved]
26 stx %fsr, [%g6 + AOFF_task_thread + AOFF_thread_xfsr]
27 9: jmpl %g7 + %g0, %g0
32 vis1: ldub [%g6 + AOFF_task_thread + AOFF_thread_fpsaved], %g3
33 stx %fsr, [%g6 + AOFF_task_thread + AOFF_thread_xfsr]
35 stb %g3, [%g6 + AOFF_task_thread + AOFF_thread_fpsaved]
40 stx %g3, [%g6 + AOFF_task_thread + AOFF_thread_gsr]
45 stb %o5, [%g3 + AOFF_task_thread + AOFF_thread_fpsaved]
48 stx %g2, [%g3 + AOFF_task_thread + AOFF_thread_gsr]
51 stx %fsr, [%g2 + AOFF_task_thread + AOFF_thread_xfsr]
53 3: andcc %o5, FPRS_DL|FPRS_DU, %g0
55 add %g6, AOFF_task_fpregs, %g2
56 andcc %o5, FPRS_DL, %g0
57 membar #StoreStore | #LoadStore
60 add %g6, AOFF_task_fpregs+0x40, %g3
61 stda %f0, [%g2 + %g1] ASI_BLK_P
62 stda %f16, [%g3 + %g1] ASI_BLK_P
63 andcc %o5, FPRS_DU, %g0
66 stda %f32, [%g2 + %g1] ASI_BLK_P
68 stda %f48, [%g3 + %g1] ASI_BLK_P
73 6: ldub [%g3 + AOFF_task_thread + AOFF_thread_fpsaved], %o5
75 add %g6, AOFF_task_fpregs+0x80, %g2
76 stb %o5, [%g3 + AOFF_task_thread + AOFF_thread_fpsaved]
79 add %g6, AOFF_task_fpregs+0xc0, %g3
80 wr %g0, FPRS_FEF, %fprs
81 membar #StoreStore | #LoadStore
82 stda %f32, [%g2 + %g1] ASI_BLK_P
83 stda %f48, [%g3 + %g1] ASI_BLK_P
91 ldub [%g6 + AOFF_task_thread + AOFF_thread_fpdepth], %g1
94 stb %g0, [%g6 + AOFF_task_thread + AOFF_thread_fpsaved]
95 stx %fsr, [%g6 + AOFF_task_thread + AOFF_thread_xfsr]
98 wr %g0, FPRS_FEF, %fprs
104 2: addcc %g6, %g1, %g3
106 andn %o5, FPRS_DU, %g2
107 stb %g2, [%g3 + AOFF_task_thread + AOFF_thread_fpsaved]
111 stx %g2, [%g3 + AOFF_task_thread + AOFF_thread_gsr]
113 stx %fsr, [%g2 + AOFF_task_thread + AOFF_thread_xfsr]
115 3: andcc %o5, FPRS_DL, %g0
117 add %g6, AOFF_task_fpregs, %g2
119 membar #StoreStore | #LoadStore
120 add %g6, AOFF_task_fpregs+0x40, %g3
121 stda %f0, [%g2 + %g1] ASI_BLK_P
122 stda %f16, [%g3 + %g1] ASI_BLK_P
124 4: and %o5, FPRS_DU, %o5
126 wr %o5, FPRS_FEF, %fprs