mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-27 15:30:35 +00:00
120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
// Copyright (C) 2003 Dolphin Project.
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, version 2.0 or later versions.
|
|
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License 2.0 for more details.
|
|
|
|
// A copy of the GPL 2.0 should have been included with the program.
|
|
// If not, see http://www.gnu.org/licenses/
|
|
|
|
// Official SVN repository and contact information can be found at
|
|
// http://code.google.com/p/dolphin-emu/
|
|
|
|
#include "Common.h"
|
|
#include "ArmEmitter.h"
|
|
#include "ArmABI.h"
|
|
|
|
using namespace ArmGen;
|
|
// If passing arguments, don't use this.
|
|
void ARMXEmitter::ARMABI_CallFunction(void *func)
|
|
{
|
|
ARMABI_MOVI2R(R14, Mem(func));
|
|
PUSH(5, R0, R1, R2, R3, _LR);
|
|
BL(R14);
|
|
POP(5, R0, R1, R2, R3, _LR);
|
|
}
|
|
void ARMXEmitter::ARMABI_CallFunctionC(void *func, u32 Arg)
|
|
{
|
|
ARMABI_MOVI2R(R14, Mem(func));
|
|
PUSH(5, R0, R1, R2, R3, _LR);
|
|
ARMABI_MOVI2R(R0, Arg);
|
|
BL(R14);
|
|
POP(5, R0, R1, R2, R3, _LR);
|
|
|
|
}
|
|
void ARMXEmitter::ARMABI_CallFunctionCC(void *func, u32 Arg1, u32 Arg2)
|
|
{
|
|
ARMABI_MOVI2R(R14, Mem(func));
|
|
PUSH(5, R0, R1, R2, R3, _LR);
|
|
ARMABI_MOVI2R(R0, Arg1);
|
|
ARMABI_MOVI2R(R1, Arg2);
|
|
BL(R14);
|
|
POP(5, R0, R1, R2, R3, _LR);
|
|
|
|
}
|
|
void ARMXEmitter::ARMABI_PushAllCalleeSavedRegsAndAdjustStack() {
|
|
// Note: 4 * 4 = 16 bytes, so alignment is preserved.
|
|
PUSH(4, R0, R1, R2, R3);
|
|
}
|
|
|
|
void ARMXEmitter::ARMABI_PopAllCalleeSavedRegsAndAdjustStack() {
|
|
POP(4, R0, R1, R2, R3);
|
|
}
|
|
void ARMXEmitter::ARMABI_MOVI2R(ARMReg reg, Operand2 val)
|
|
{
|
|
// TODO: There are more fancy ways to save calls if we check if
|
|
// The imm can be rotated or shifted a certain way.
|
|
// Masks tend to be able to be moved in to a reg with one call
|
|
MOVW(reg, val);
|
|
if(val.Value & 0xFFFF0000)
|
|
MOVT(reg, val, true);
|
|
}
|
|
// Moves IMM to memory location
|
|
void ARMXEmitter::ARMABI_MOVI2M(Operand2 op, Operand2 val)
|
|
{
|
|
// This moves imm to a memory location
|
|
MOVW(R14, val); MOVT(R14, val, true);
|
|
MOVW(R12, op); MOVT(R12, op, true);
|
|
STR(R12, R14); // R10 is what we want to store
|
|
}
|
|
const char *conditions[] = {"EQ", "NEQ", "CS", "CC", "MI", "PL", "VS", "VC", "HI", "LS", "GE", "LT", "GT", "LE", "AL" };
|
|
static void ShowCondition(u32 cond)
|
|
{
|
|
printf("Condition: %s[%d]\n", conditions[cond], cond);
|
|
}
|
|
void ARMXEmitter::ARMABI_ShowConditions()
|
|
{
|
|
const u8 *ptr = GetCodePtr();
|
|
FixupBranch cc[15];
|
|
for(u32 a = 0; a < 15; ++a)
|
|
cc[a] = B_CC((CCFlags)a);
|
|
|
|
for(u32 a = 0; a < 15; ++a)
|
|
{
|
|
SetJumpTarget(cc[a]);
|
|
ARMABI_CallFunctionC((void*)&ShowCondition, a);
|
|
if(a != 14)
|
|
B(ptr + ((a + 1) * 4));
|
|
}
|
|
}
|
|
// NZCVQ is stored in the lower five bits of the Flags variable
|
|
// GE values are in the lower four bits of the GEval variable
|
|
|
|
void ARMXEmitter::UpdateAPSR(bool NZCVQ, u8 Flags, bool GE, u8 GEval)
|
|
{
|
|
if(NZCVQ && GE)
|
|
{
|
|
// Can't update GE with the other ones with a immediate
|
|
// Got to use a scratch register
|
|
u32 Imm = (Flags << 27) | ((GEval & 0xF) << 16);
|
|
ARMABI_MOVI2R(R14, IMM(Imm));
|
|
_MSR(true, true, R14);
|
|
}
|
|
else
|
|
if(NZCVQ)
|
|
{
|
|
Operand2 value(Flags << 1, 3);
|
|
_MSR(true, false, value);
|
|
}
|
|
else if(GE)
|
|
{
|
|
Operand2 value(GEval << 2, 9);
|
|
_MSR(false, true, value);
|
|
}
|
|
}
|