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annotate dyncallback/dyncall_args_sparc32.c @ 663:127b569978cc default tip

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- another tweak handling clang trying to be too smart (see last commit)
author Tassilo Philipp
date Sun, 24 Mar 2024 13:52:44 +0100
parents 93ce63d72d59
children
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1 /*
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2
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3 Package: dyncall
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4 Library: dyncallback
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5 File: dyncallback/dyncall_args_sparc32.c
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6 Description: Callback's Arguments VM - Implementation for sparc32 - not yet
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7 License:
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8
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9 Copyright (c) 2007-2024 Daniel Adler <dadler@uni-goettingen.de>,
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10 Tassilo Philipp <tphilipp@potion-studios.com>
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11
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12 Permission to use, copy, modify, and distribute this software for any
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13 purpose with or without fee is hereby granted, provided that the above
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14 copyright notice and this permission notice appear in all copies.
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15
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16 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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17 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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18 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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19 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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21 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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22 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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23
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24 */
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25
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26
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27 #include "dyncall_args.h"
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28
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29 struct DCArgs
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30 {
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31 int *arg_ptr;
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32 };
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33
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34 /* Compiler aligns this to 8-byte boundaries, b/c of dword members, a fact needed below */
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35 typedef union {
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36 DCdouble d;
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37 DCulonglong L;
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38 DCulong l[2];
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39 } DCAligned64BitVal_t;
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40
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41 static void* sparc_word(DCArgs* args)
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42 {
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43 return args->arg_ptr++;
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44 }
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45
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46 static void* sparc_dword(DCArgs* args)
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47 {
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48 void *p = args->arg_ptr;
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49 args->arg_ptr += 2;
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50 return p;
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51 }
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52
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53 /* copy words so that dwords are 8-byte aligned, for 64bit value indirection; unaligned
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54 access results in SIGBUS; not quite sure why compiler doesn't abstract this (maybe b/c
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55 of not having any idea about our assembler code?) */
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56 DCulonglong dcbArgULongLong(DCArgs* p) { DCAligned64BitVal_t v; DCulong *l = (DCulong*)sparc_dword(p); v.l[0]=l[0]; v.l[1]=l[1]; return v.L; }
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57 DCdouble dcbArgDouble (DCArgs* p) { DCAligned64BitVal_t v; DCulong *l = (DCulong*)sparc_dword(p); v.l[0]=l[0]; v.l[1]=l[1]; return v.d; }
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58
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59 /* rest of getters based on above functions */
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60 DCuint dcbArgUInt (DCArgs* p) { return *(DCuint*)sparc_word(p); }
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61 DClonglong dcbArgLongLong (DCArgs* p) { return (DClonglong)dcbArgULongLong(p); }
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62 DCint dcbArgInt (DCArgs* p) { return (DCint) dcbArgUInt(p); }
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63 DClong dcbArgLong (DCArgs* p) { return (DClong) dcbArgUInt(p); }
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64 DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgUInt(p); }
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65 DCchar dcbArgChar (DCArgs* p) { return (DCchar) dcbArgUInt(p); }
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66 DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgUInt(p); }
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67 DCshort dcbArgShort (DCArgs* p) { return (DCshort) dcbArgUInt(p); }
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68 DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgUInt(p); }
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69 DCbool dcbArgBool (DCArgs* p) { return (DCbool) dcbArgUInt(p); }
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70 DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgUInt(p); }
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72 DCfloat dcbArgFloat (DCArgs* p) { return *(DCfloat*) sparc_word(p); }
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74 DCpointer dcbArgAggr (DCArgs* p, DCpointer target) { /* @@@AGGR not impl */ return NULL; }
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75 void dcbReturnAggr (DCArgs *args, DCValue *result, DCpointer ret) { /* @@@AGGR not impl */ }
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