Mercurial > pub > dyncall > dyncall
annotate dyncallback/dyncall_callback_mips_n64.S @ 357:d982a00c2177
- PPC64 asm syntax fix, specifying explicitly comparison mode for cmpi (newer toolchains complain, older ones took optional field of instruction which happened to be same value)
| author | Tassilo Philipp |
|---|---|
| date | Tue, 25 Feb 2020 18:16:13 +0100 |
| parents | b104c5beec8b |
| children |
| rev | line source |
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| 94 | 1 /* |
| 2 | |
| 3 Package: dyncall | |
| 4 Library: dyncallback | |
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5 File: dyncallback/dyncall_callback_mips_n64.S |
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6 Description: Callback Thunk - Implementation for mips64 n64 |
| 94 | 7 License: |
| 8 | |
| 305 | 9 Copyright (c) 2016-2018 Tassilo Philipp <tphilipp@potion-studios.com> |
| 94 | 10 |
| 11 Permission to use, copy, modify, and distribute this software for any | |
| 12 purpose with or without fee is hereby granted, provided that the above | |
| 13 copyright notice and this permission notice appear in all copies. | |
| 14 | |
| 15 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
| 16 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 17 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
| 18 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
| 21 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 */ | |
| 24 | |
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25 /* input: |
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26 $t8 -> thunk |
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27 $t8+56 -> cb handler |
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28 $t8+64 -> userdata |
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29 */ |
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30 |
| 305 | 31 /* Frame size is 160b for hard- and 128b for soft-float, as follows: */ |
| 32 /* DCargs(fregs:64? + iregs:64 + regcnts:8 + sp:8) + rval:8 + ra:8 */ | |
| 33 #if defined(DC__ABI_HARDFLOAT) | |
| 34 SP_SP = 160 | |
| 35 #else | |
| 36 SP_SP = 96 | |
| 37 #endif | |
| 38 SP_LR = SP_SP-8 | |
| 39 SP_RVAL = SP_SP-16 | |
| 40 SP_ARG_SP = SP_SP-24 | |
| 41 SP_ARG_RC = SP_SP-32 | |
| 42 | |
| 116 | 43 .section .mdebug.abi64 |
| 44 .previous | |
| 45 .abicalls | |
| 46 .text | |
| 47 .align 2 | |
| 94 | 48 .globl dcCallbackThunkEntry |
| 116 | 49 .ent dcCallbackThunkEntry |
| 94 | 50 dcCallbackThunkEntry: |
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51 .set noreorder |
| 94 | 52 |
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53 /* Prolog. */ |
| 305 | 54 daddiu $sp, $sp, -SP_SP /* open frame */ |
| 55 sd $ra, SP_LR($sp) /* save link register */ | |
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56 |
| 305 | 57 .frame $fp,SP_SP,$31 /* specify our frame: fp,size,lr; creates virt $fp */ |
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58 /* code below doesn't use $fp though, as n/a with -O1 */ |
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59 /* Init return value */ |
| 305 | 60 sd $zero, SP_RVAL($sp) |
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61 |
| 305 | 62 /* Store reg args where our DCargs member arrays are, in local stack area */ |
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63 sd $4, 0($sp) |
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64 sd $5, 8($sp) |
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65 sd $6, 16($sp) |
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66 sd $7, 24($sp) |
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67 sd $8, 32($sp) |
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68 sd $9, 40($sp) |
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69 sd $10, 48($sp) |
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70 sd $11, 56($sp) |
| 305 | 71 #if defined(DC__ABI_HARDFLOAT) |
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72 s.d $f12, 64($sp) |
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73 s.d $f13, 72($sp) |
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74 s.d $f14, 80($sp) |
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75 s.d $f15, 88($sp) |
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76 s.d $f16, 96($sp) |
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77 s.d $f17, 104($sp) |
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78 s.d $f18, 112($sp) |
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79 s.d $f19, 120($sp) |
| 305 | 80 #endif |
| 116 | 81 |
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82 /* Init DCarg's reg_counts and stackptr. */ |
| 305 | 83 sd $zero, SP_ARG_RC($sp) /* reg_count */ |
| 84 daddiu $4, $sp, SP_SP | |
| 85 sd $4, SP_ARG_SP($sp) /* stackptr */ | |
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86 |
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87 /* Prepare callback handler call. */ |
| 305 | 88 move $4, $24 /* Param 0 = DCCallback*, $24/$t8 holds DCThunk* */ |
| 89 move $5, $sp /* Param 1 = ptr to where DCArgs* is stored */ | |
| 90 daddiu $6, $sp, SP_RVAL /* Param 2 = results ptr to 8b of local stack data */ | |
| 91 ld $7, 64($24) /* Param 3 = userdata pointer */ | |
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92 |
| 305 | 93 ld $25, 56($24) /* store handler entry in $25/$t9, required for PIC */ |
| 94 jalr $25 /* jump */ | |
| 95 nop /* branch delay nop */ | |
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96 |
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97 /* Copy result in corresponding registers $2-$3 ($v0-$v1) and $f0 */ |
| 305 | 98 ld $2, SP_RVAL($sp) /* note: ignoring 2nd possible retval in $3, here */ |
| 99 #if defined(DC__ABI_HARDFLOAT) | |
| 100 l.d $f0, SP_RVAL($sp) | |
| 101 #endif | |
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102 |
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103 /* Epilog. Tear down frame and return. */ |
| 305 | 104 ld $ra, SP_LR($sp) /* restore return address */ |
| 105 daddiu $sp, $sp, SP_SP /* close frame */ | |
| 106 j $ra /* return */ | |
| 107 nop /* branch delay nop */ | |
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108 |
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109 .set reorder |
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110 .end dcCallbackThunkEntry |
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111 .ident "handwritten" |
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112 |