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Kevin Bentley
564
AngelScript/source/as_callfunc_mips.cpp
Normal file
564
AngelScript/source/as_callfunc_mips.cpp
Normal file
@@ -0,0 +1,564 @@
|
||||
/*
|
||||
AngelCode Scripting Library
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||||
Copyright (c) 2003-2009 Andreas Jonsson
|
||||
|
||||
This software is provided 'as-is', without any express or implied
|
||||
warranty. In no event will the authors be held liable for any
|
||||
damages arising from the use of this software.
|
||||
|
||||
Permission is granted to anyone to use this software for any
|
||||
purpose, including commercial applications, and to alter it and
|
||||
redistribute it freely, subject to the following restrictions:
|
||||
|
||||
1. The origin of this software must not be misrepresented; you
|
||||
must not claim that you wrote the original software. If you use
|
||||
this software in a product, an acknowledgment in the product
|
||||
documentation would be appreciated but is not required.
|
||||
|
||||
2. Altered source versions must be plainly marked as such, and
|
||||
must not be misrepresented as being the original software.
|
||||
|
||||
3. This notice may not be removed or altered from any source
|
||||
distribution.
|
||||
|
||||
The original version of this library can be located at:
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||||
http://www.angelcode.com/angelscript/
|
||||
|
||||
Andreas Jonsson
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||||
andreas@angelcode.com
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||||
*/
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||||
|
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|
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//
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// as_callfunc_mips.cpp
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//
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// These functions handle the actual calling of system functions
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||||
//
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||||
// This version is MIPS specific and was originally written
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// by Manu Evans in April, 2006
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||||
//
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||||
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|
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#include "as_config.h"
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#ifndef MAX_PORTABILITY
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#ifdef AS_MIPS
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|
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#include "as_callfunc.h"
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#include "as_scriptengine.h"
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#include "as_texts.h"
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#include "as_tokendef.h"
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|
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#include <stdio.h>
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#include <stdlib.h>
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#include <regdef.h>
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|
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BEGIN_AS_NAMESPACE
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|
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#define AS_MIPS_MAX_ARGS 32
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#define AS_NUM_REG_FLOATS 8
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#define AS_NUM_REG_INTS 8
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// The array used to send values to the correct places.
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// first 0-8 regular values to load into the a0-a3, t0-t3 registers
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// then 0-8 float values to load into the f12-f19 registers
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// then (AS_MIPS_MAX_ARGS - 16) values to load onto the stack
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// the +1 is for when CallThis (object methods) is used
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// extra +1 when returning in memory
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extern "C" {
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static asDWORD mipsArgs[AS_MIPS_MAX_ARGS + 1 + 1];
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}
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|
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// Loads all data into the correct places and calls the function.
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// intArgSize is the size in bytes for how much data to put in int registers
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// floatArgSize is the size in bytes for how much data to put in float registers
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// stackArgSize is the size in bytes for how much data to put on the callstack
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extern "C" asQWORD mipsFunc(int intArgSize, int floatArgSize, int stackArgSize, asDWORD func);
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// puts the arguments in the correct place in the mipsArgs-array. See comments above.
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// This could be done better.
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inline void splitArgs(const asDWORD *args, int argNum, int &numRegIntArgs, int &numRegFloatArgs, int &numRestArgs, int hostFlags)
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{
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int i;
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int argBit = 1;
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for (i = 0; i < argNum; i++)
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{
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if (hostFlags & argBit)
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{
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if (numRegFloatArgs < AS_NUM_REG_FLOATS)
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{
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// put in float register
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mipsArgs[AS_NUM_REG_INTS + numRegFloatArgs] = args[i];
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numRegFloatArgs++;
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}
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else
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{
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// put in stack
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mipsArgs[AS_NUM_REG_INTS + AS_NUM_REG_FLOATS + numRestArgs] = args[i];
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numRestArgs++;
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}
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}
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else
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{
|
||||
if (numRegIntArgs < AS_NUM_REG_INTS)
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{
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// put in int register
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mipsArgs[numRegIntArgs] = args[i];
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numRegIntArgs++;
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}
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else
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{
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// put in stack
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mipsArgs[AS_NUM_REG_INTS + AS_NUM_REG_FLOATS + numRestArgs] = args[i];
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numRestArgs++;
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}
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}
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argBit <<= 1;
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}
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}
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asQWORD CallCDeclFunction(const asDWORD *args, int argSize, asDWORD func, int flags)
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{
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int argNum = argSize >> 2;
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int intArgs = 0;
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int floatArgs = 0;
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int restArgs = 0;
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// put the arguments in the correct places in the mipsArgs array
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if(argNum > 0)
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splitArgs(args, argNum, intArgs, floatArgs, restArgs, flags);
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return mipsFunc(intArgs << 2, floatArgs << 2, restArgs << 2, func);
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}
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// This function is identical to CallCDeclFunction, with the only difference that
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// the value in the first parameter is the object
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asQWORD CallThisCallFunction(const void *obj, const asDWORD *args, int argSize, asDWORD func, int flags)
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{
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int argNum = argSize >> 2;
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int intArgs = 1;
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int floatArgs = 0;
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int restArgs = 0;
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mipsArgs[0] = (asDWORD) obj;
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// put the arguments in the correct places in the mipsArgs array
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if (argNum > 0)
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splitArgs(args, argNum, intArgs, floatArgs, restArgs, flags);
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return mipsFunc(intArgs << 2, floatArgs << 2, restArgs << 2, func);
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}
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// This function is identical to CallCDeclFunction, with the only difference that
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// the value in the last parameter is the object
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asQWORD CallThisCallFunction_objLast(const void *obj, const asDWORD *args, int argSize, asDWORD func, int flags)
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{
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int argNum = argSize >> 2;
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int intArgs = 0;
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int floatArgs = 0;
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int restArgs = 0;
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// put the arguments in the correct places in the mipsArgs array
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if(argNum > 0)
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splitArgs(args, argNum, intArgs, floatArgs, restArgs, flags);
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if(intArgs < AS_NUM_REG_INTS)
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{
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mipsArgs[intArgs] = (asDWORD) obj;
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intArgs++;
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}
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else
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{
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mipsArgs[AS_NUM_REG_INTS + AS_NUM_REG_FLOATS + restArgs] = (asDWORD) obj;
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restArgs++;
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}
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return mipsFunc(intArgs << 2, floatArgs << 2, restArgs << 2, func);
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}
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asDWORD GetReturnedFloat()
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{
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asDWORD f;
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asm("swc1 $f0, %0\n" : "=m"(f));
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return f;
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}
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/*
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asDWORD GetReturnedFloat();
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asm(
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" .align 4\n"
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" .global GetReturnedFloat\n"
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"GetReturnedFloat:\n"
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" .set noreorder\n"
|
||||
" .set nomacro\n"
|
||||
" j $ra\n"
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" mfc1 $v0, $f0\n"
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" .set macro\n"
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" .set reorder\n"
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" .end Func\n"
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*/
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// sizeof(double) == 4 with sh-elf-gcc (3.4.0) -m4
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// so this isn't really used...
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asQWORD GetReturnedDouble()
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{
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asQWORD d;
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printf("Broken!!!");
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/*
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asm("sw $v0, %0\n" : "=m"(d));
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*/
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return d;
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}
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int CallSystemFunction(int id, asCContext *context, void *objectPointer)
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{
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asCScriptEngine *engine = context->engine;
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asSSystemFunctionInterface *sysFunc = engine->scriptFunctions[id]->sysFuncIntf;
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int callConv = sysFunc->callConv;
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if( callConv == ICC_GENERIC_FUNC || callConv == ICC_GENERIC_METHOD )
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return context->CallGeneric(id, objectPointer);
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asQWORD retQW = 0;
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asCScriptFunction *descr = engine->scriptFunctions[id];
|
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void *func = (void*)sysFunc->func;
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int paramSize = sysFunc->paramSize;
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asDWORD *args = context->regs.stackPointer;
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void *retPointer = 0;
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void *obj = 0;
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asDWORD *vftable;
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int popSize = paramSize;
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context->regs.objectType = descr->returnType.GetObjectType();
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if( descr->returnType.IsObject() && !descr->returnType.IsReference() && !descr->returnType.IsObjectHandle() )
|
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{
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// Allocate the memory for the object
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retPointer = engine->CallAlloc(descr->returnType.GetObjectType());
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mipsArgs[AS_MIPS_MAX_ARGS+1] = (asDWORD) retPointer;
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if( sysFunc->hostReturnInMemory )
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{
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// The return is made in memory
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callConv++;
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}
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}
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if( callConv >= ICC_THISCALL )
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{
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if( objectPointer )
|
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{
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obj = objectPointer;
|
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}
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else
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{
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// The object pointer should be popped from the context stack
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popSize++;
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// Check for null pointer
|
||||
obj = (void*)*(args + paramSize);
|
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if( obj == 0 )
|
||||
{
|
||||
context->SetInternalException(TXT_NULL_POINTER_ACCESS);
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if( retPointer )
|
||||
engine->CallFree(retPointer);
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return 0;
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}
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// Add the base offset for multiple inheritance
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obj = (void*)(int(obj) + sysFunc->baseOffset);
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||||
}
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}
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asASSERT(descr->parameterTypes.GetLength() <= AS_MIPS_MAX_ARGS);
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// mark all float arguments
|
||||
int argBit = 1;
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int hostFlags = 0;
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int intArgs = 0;
|
||||
for( size_t a = 0; a < descr->parameterTypes.GetLength(); a++ )
|
||||
{
|
||||
if (descr->parameterTypes[a].IsFloatType())
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hostFlags |= argBit;
|
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else
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intArgs++;
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argBit <<= 1;
|
||||
}
|
||||
|
||||
asDWORD paramBuffer[64];
|
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if( sysFunc->takesObjByVal )
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{
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paramSize = 0;
|
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int spos = 0;
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||||
int dpos = 1;
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for( asUINT n = 0; n < descr->parameterTypes.GetLength(); n++ )
|
||||
{
|
||||
if( descr->parameterTypes[n].IsObject() && !descr->parameterTypes[n].IsObjectHandle() && !descr->parameterTypes[n].IsReference() )
|
||||
{
|
||||
#ifdef COMPLEX_OBJS_PASSED_BY_REF
|
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if( descr->parameterTypes[n].GetObjectType()->flags & COMPLEX_MASK )
|
||||
{
|
||||
paramBuffer[dpos++] = args[spos++];
|
||||
paramSize++;
|
||||
}
|
||||
else
|
||||
#endif
|
||||
{
|
||||
// Copy the object's memory to the buffer
|
||||
memcpy(¶mBuffer[dpos], *(void**)(args+spos), descr->parameterTypes[n].GetSizeInMemoryBytes());
|
||||
// Delete the original memory
|
||||
engine->CallFree(*(char**)(args+spos));
|
||||
spos++;
|
||||
dpos += descr->parameterTypes[n].GetSizeInMemoryDWords();
|
||||
paramSize += descr->parameterTypes[n].GetSizeInMemoryDWords();
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// Copy the value directly
|
||||
paramBuffer[dpos++] = args[spos++];
|
||||
if( descr->parameterTypes[n].GetSizeOnStackDWords() > 1 )
|
||||
paramBuffer[dpos++] = args[spos++];
|
||||
paramSize += descr->parameterTypes[n].GetSizeOnStackDWords();
|
||||
}
|
||||
}
|
||||
// Keep a free location at the beginning
|
||||
args = ¶mBuffer[1];
|
||||
}
|
||||
|
||||
context->isCallingSystemFunction = true;
|
||||
switch( callConv )
|
||||
{
|
||||
case ICC_CDECL:
|
||||
case ICC_CDECL_RETURNINMEM:
|
||||
case ICC_STDCALL:
|
||||
case ICC_STDCALL_RETURNINMEM:
|
||||
retQW = CallCDeclFunction(args, paramSize<<2, (asDWORD)func, hostFlags);
|
||||
break;
|
||||
case ICC_THISCALL:
|
||||
case ICC_THISCALL_RETURNINMEM:
|
||||
retQW = CallThisCallFunction(obj, args, paramSize<<2, (asDWORD)func, hostFlags);
|
||||
break;
|
||||
case ICC_VIRTUAL_THISCALL:
|
||||
case ICC_VIRTUAL_THISCALL_RETURNINMEM:
|
||||
// Get virtual function table from the object pointer
|
||||
vftable = *(asDWORD**)obj;
|
||||
retQW = CallThisCallFunction(obj, args, paramSize<<2, vftable[asDWORD(func)>>2], hostFlags);
|
||||
break;
|
||||
case ICC_CDECL_OBJLAST:
|
||||
case ICC_CDECL_OBJLAST_RETURNINMEM:
|
||||
retQW = CallThisCallFunction_objLast(obj, args, paramSize<<2, (asDWORD)func, hostFlags);
|
||||
break;
|
||||
case ICC_CDECL_OBJFIRST:
|
||||
case ICC_CDECL_OBJFIRST_RETURNINMEM:
|
||||
retQW = CallThisCallFunction(obj, args, paramSize<<2, (asDWORD)func, hostFlags);
|
||||
break;
|
||||
default:
|
||||
context->SetInternalException(TXT_INVALID_CALLING_CONVENTION);
|
||||
}
|
||||
context->isCallingSystemFunction = false;
|
||||
|
||||
#ifdef COMPLEX_OBJS_PASSED_BY_REF
|
||||
if( sysFunc->takesObjByVal )
|
||||
{
|
||||
// Need to free the complex objects passed by value
|
||||
args = context->regs.stackPointer;
|
||||
if( callConv >= (int)ICC_THISCALL && !objectPointer )
|
||||
args++;
|
||||
|
||||
int spos = 0;
|
||||
for( size_t n = 0; n < descr->parameterTypes.GetLength(); n++ )
|
||||
{
|
||||
if( descr->parameterTypes[n].IsObject() &&
|
||||
!descr->parameterTypes[n].IsReference() &&
|
||||
(descr->parameterTypes[n].GetObjectType()->flags & COMPLEX_MASK) )
|
||||
{
|
||||
void *obj = (void*)args[spos++];
|
||||
asSTypeBehaviour *beh = &descr->parameterTypes[n].GetObjectType()->beh;
|
||||
if( beh->destruct )
|
||||
engine->CallObjectMethod(obj, beh->destruct);
|
||||
|
||||
engine->CallFree(obj);
|
||||
}
|
||||
else
|
||||
spos += descr->parameterTypes[n].GetSizeInMemoryDWords();
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
// Store the returned value in our stack
|
||||
if( descr->returnType.IsObject() && !descr->returnType.IsReference() )
|
||||
{
|
||||
if( descr->returnType.IsObjectHandle() )
|
||||
{
|
||||
context->regs.objectRegister = (void*)(asDWORD)retQW;
|
||||
|
||||
if( sysFunc->returnAutoHandle && context->regs.objectRegister )
|
||||
engine->CallObjectMethod(context->regs.objectRegister, descr->returnType.GetObjectType()->beh.addref);
|
||||
}
|
||||
else
|
||||
{
|
||||
if( !sysFunc->hostReturnInMemory )
|
||||
{
|
||||
// Copy the returned value to the pointer sent by the script engine
|
||||
if( sysFunc->hostReturnSize == 1 )
|
||||
*(asDWORD*)retPointer = (asDWORD)retQW;
|
||||
else
|
||||
*(asQWORD*)retPointer = retQW;
|
||||
}
|
||||
|
||||
// Store the object in the register
|
||||
context->regs.objectRegister = retPointer;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// Store value in valueRegister
|
||||
if( sysFunc->hostReturnFloat )
|
||||
{
|
||||
if( sysFunc->hostReturnSize == 1 )
|
||||
*(asDWORD*)&context->regs.valueRegister = GetReturnedFloat();
|
||||
else
|
||||
context->regs.valueRegister = GetReturnedDouble();
|
||||
}
|
||||
else if( sysFunc->hostReturnSize == 1 )
|
||||
*(asDWORD*)&context->regs.valueRegister = (asDWORD)retQW;
|
||||
else
|
||||
context->regs.valueRegister = retQW;
|
||||
}
|
||||
|
||||
if( sysFunc->hasAutoHandles )
|
||||
{
|
||||
args = context->regs.stackPointer;
|
||||
if( callConv >= ICC_THISCALL && !objectPointer )
|
||||
args++;
|
||||
|
||||
int spos = 0;
|
||||
for( asUINT n = 0; n < descr->parameterTypes.GetLength(); n++ )
|
||||
{
|
||||
if( sysFunc->paramAutoHandles[n] && args[spos] )
|
||||
{
|
||||
// Call the release method on the type
|
||||
engine->CallObjectMethod((void*)args[spos], descr->parameterTypes[n].GetObjectType()->beh.release);
|
||||
args[spos] = 0;
|
||||
}
|
||||
|
||||
if( descr->parameterTypes[n].IsObject() && !descr->parameterTypes[n].IsObjectHandle() && !descr->parameterTypes[n].IsReference() )
|
||||
spos++;
|
||||
else
|
||||
spos += descr->parameterTypes[n].GetSizeOnStackDWords();
|
||||
}
|
||||
}
|
||||
|
||||
return popSize;
|
||||
}
|
||||
|
||||
asm(
|
||||
" .text\n"
|
||||
//" .align 2\n"
|
||||
" .global mipsFunc\n"
|
||||
" .ent mipsFunc\n"
|
||||
"mipsFunc:\n"
|
||||
//" .frame $fp,64,$31 # vars= 0, regs= 0/0, args= 0, gp= 0\n"
|
||||
//" .mask 0x00000000,0\n"
|
||||
//" .fmask 0x00000000,0\n"
|
||||
" .set noreorder\n"
|
||||
" .set nomacro\n"
|
||||
// align the stack frame to 8 bytes
|
||||
" addiu $12, $6, 7\n"
|
||||
" li $13, -8\n" // 0xfffffffffffffffc
|
||||
" and $12, $12, $13\n" // t4 holds the size of the argument block
|
||||
// and add 8 bytes for the return pointer and s0 backup
|
||||
" addiu $13, $12, 8\n" // t5 holds the total size of the stack frame (including return pointer)
|
||||
// save the s0 register (so we can use it to remember where our return pointer is lives)
|
||||
" sw $16, -4($sp)\n" // store the s0 register (so we can use it to remember how big our stack frame is)
|
||||
// push the stack
|
||||
" subu $sp, $sp, $13\n"
|
||||
// find the return address, place in s0
|
||||
" addu $16, $sp, $12\n"
|
||||
// store the return pointer
|
||||
" sw $31, 0($16)\n"
|
||||
|
||||
// backup our function params
|
||||
" addiu $2, $7, 0\n"
|
||||
" addiu $3, $6, 0\n"
|
||||
|
||||
// get global mipsArgs[] array pointer
|
||||
//" lui $15, %hi(mipsArgs)\n"
|
||||
//" addiu $15, $15, %lo(mipsArgs)\n"
|
||||
// we'll use the macro instead because SN Systems doesnt like %hi/%lo
|
||||
".set macro\n"
|
||||
" la $15, mipsArgs\n"
|
||||
".set nomacro\n"
|
||||
// load register params
|
||||
" lw $4, 0($15)\n"
|
||||
" lw $5, 4($15)\n"
|
||||
" lw $6, 8($15)\n"
|
||||
" lw $7, 12($15)\n"
|
||||
" lw $8, 16($15)\n"
|
||||
" lw $9, 20($15)\n"
|
||||
" lw $10, 24($15)\n"
|
||||
" lw $11, 28($15)\n"
|
||||
|
||||
// load float params
|
||||
" lwc1 $f12, 32($15)\n"
|
||||
" lwc1 $f13, 36($15)\n"
|
||||
" lwc1 $f14, 40($15)\n"
|
||||
" lwc1 $f15, 44($15)\n"
|
||||
" lwc1 $f16, 48($15)\n"
|
||||
" lwc1 $f17, 52($15)\n"
|
||||
" lwc1 $f18, 56($15)\n"
|
||||
" lwc1 $f19, 60($15)\n"
|
||||
|
||||
// skip stack paramaters if there are none
|
||||
" beq $3, $0, andCall\n"
|
||||
|
||||
// push stack paramaters
|
||||
" addiu $15, $15, 64\n"
|
||||
"pushArgs:\n"
|
||||
" addiu $3, -4\n"
|
||||
// load from $15 + stack bytes ($3)
|
||||
" addu $14, $15, $3\n"
|
||||
" lw $14, 0($14)\n"
|
||||
// store to $sp + stack bytes ($3)
|
||||
" addu $13, $sp, $3\n"
|
||||
" sw $14, 0($13)\n"
|
||||
// if there are more, loop...
|
||||
" bne $3, $0, pushArgs\n"
|
||||
" nop\n"
|
||||
|
||||
// and call the function
|
||||
"andCall:\n"
|
||||
" jal $2\n"
|
||||
" nop\n"
|
||||
|
||||
// restore the return pointer
|
||||
" lw $31, 0($16)\n"
|
||||
// pop the stack pointer (remembering the return pointer was 8 bytes below the top)
|
||||
" addiu $sp, $16, 8\n"
|
||||
// and return from the function
|
||||
" jr $31\n"
|
||||
// restore the s0 register (in the branch delay slot)
|
||||
" lw $16, -4($sp)\n"
|
||||
" .set macro\n"
|
||||
" .set reorder\n"
|
||||
" .end mipsFunc\n"
|
||||
" .size mipsFunc, .-mipsFunc\n"
|
||||
);
|
||||
|
||||
END_AS_NAMESPACE
|
||||
|
||||
#endif // AS_MIPS
|
||||
#endif // AS_MAX_PORTABILITY
|
||||
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user