| 1 | /* SPDX-License-Identifier: GPL-2.0 */
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| 2 | /*
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| 3 | * VISsave.S: Code for saving FPU register state for
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| 4 | * VIS routines. One should not call this directly,
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| 5 | * but use macros provided in <asm/visasm.h>.
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| 6 | *
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| 7 | * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
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| 8 | */
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| 9 |
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| 10 | |
| 11 | |
| 12 |
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| 13 | |
| 14 | |
| 15 | |
| 16 | |
| 17 | |
| 18 |
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| 19 | /* On entry: %o5=current FPRS value, %g7 is callers address */
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| 20 | /* May clobber %o5, %g1, %g2, %g3, %g7, %icc, %xcc */
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| 21 |
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| 22 | /* Nothing special need be done here to handle pre-emption, this
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| 23 | * FPU save/restore mechanism is already preemption safe.
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| 24 | */
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| 25 | .text
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| 26 | .align 32
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| 27 | ENTRY(VISenter)
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| 28 | ldub [%g6 + TI_FPDEPTH], %g1
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| 29 | brnz,a,pn %g1, 1f
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| 30 | cmp %g1, 1
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| 31 | stb %g0, [%g6 + TI_FPSAVED]
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| 32 | stx %fsr, [%g6 + TI_XFSR]
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| 33 | 9: jmpl %g7 + %g0, %g0
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| 34 | nop
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| 35 | 1: bne,pn %icc, 2f
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| 36 |
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| 37 | srl %g1, 1, %g1
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| 38 | vis1: ldub [%g6 + TI_FPSAVED], %g3
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| 39 | stx %fsr, [%g6 + TI_XFSR]
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| 40 | or %g3, %o5, %g3
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| 41 | stb %g3, [%g6 + TI_FPSAVED]
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| 42 | rd %gsr, %g3
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| 43 | clr %g1
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| 44 | ba,pt %xcc, 3f
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| 45 |
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| 46 | stx %g3, [%g6 + TI_GSR]
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| 47 | 2: add %g6, %g1, %g3
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| 48 | mov FPRS_DU | FPRS_DL | FPRS_FEF, %o5
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| 49 | sll %g1, 3, %g1
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| 50 | stb %o5, [%g3 + TI_FPSAVED]
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| 51 | rd %gsr, %g2
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| 52 | add %g6, %g1, %g3
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| 53 | stx %g2, [%g3 + TI_GSR]
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| 54 |
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| 55 | add %g6, %g1, %g2
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| 56 | stx %fsr, [%g2 + TI_XFSR]
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| 57 | sll %g1, 5, %g1
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| 58 | 3: andcc %o5, FPRS_DL|FPRS_DU, %g0
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| 59 | be,pn %icc, 9b
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| 60 | add %g6, TI_FPREGS, %g2
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| 61 | andcc %o5, FPRS_DL, %g0
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| 62 |
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| 63 | be,pn %icc, 4f
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| 64 | add %g6, TI_FPREGS+0x40, %g3
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| 65 | membar |
| 66 | stda %f0, [%g2 + %g1] ASI_BLK_P
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| 67 | stda %f16, [%g3 + %g1] ASI_BLK_P
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| 68 | membar |
| 69 | andcc %o5, FPRS_DU, %g0
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| 70 | be,pn %icc, 5f
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| 71 | 4: add %g1, 128, %g1
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| 72 | membar |
| 73 | stda %f32, [%g2 + %g1] ASI_BLK_P
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| 74 |
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| 75 | stda %f48, [%g3 + %g1] ASI_BLK_P
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| 76 | 5: membar |
| 77 | ba,pt %xcc, 80f
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| 78 | nop
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| 79 |
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| 80 | .align 32
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| 81 | 80: jmpl %g7 + %g0, %g0
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| 82 | nop
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| 83 | ENDPROC(VISenter)
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| 84 | EXPORT_SYMBOL(VISenter)
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