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DSP: mov impl / comments

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2895 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
nakeee
2009-04-06 12:20:12 +00:00
parent 670ef16ace
commit 8af05ec4fb
4 changed files with 47 additions and 29 deletions
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26
Source/Plugins/Plugin_DSP_LLE-testing/Src/DSPInterpreter.cpp
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@ -127,6 +127,10 @@ void rti(const UDSPInstruction& opc)
g_dsp.exception_in_progress_hack = false;
}
// HALT
// 0000 0000 0020 0001
// Stops execution of DSP code. Sets bit DSP_CR_HALT in register DREG_CR.
void halt(const UDSPInstruction& opc)
{
g_dsp.cr |= 0x4;
@ -890,15 +894,18 @@ void inc(const UDSPInstruction& opc)
void neg(const UDSPInstruction& opc)
{
u8 areg = (opc.hex >> 8) & 0x1;
s64 acc = dsp_get_long_acc(areg);
acc = 0 - acc;
dsp_set_long_acc(areg, acc);
Update_SR_Register64(acc);
}
// MOVNP $acD
// 0111 111d xxxx xxxx
// Moves negative of multiply product from $prod register to accumulator
// $acD register.
void movnp(const UDSPInstruction& opc)
{
u8 dreg = (opc.hex >> 8) & 0x1;
@ -908,11 +915,16 @@ void movnp(const UDSPInstruction& opc)
dsp_set_long_acc(dreg, acc);
}
// TODO: Implement
// MOV $acD, $ac(1-D)
// 0110 110d xxxx xxxx
// Moves accumulator $ax(1-D) to accumulator $axD.
void mov(const UDSPInstruction& opc)
{
// UNIMPLEMENTED
ERROR_LOG(DSPHLE, "dsp_opc.hex_mov\n");
u8 D = (opc.hex >> 8) & 0x1;
u16 ac1 = dsp_get_acc_m(D);
u16 ac2 = dsp_get_acc_m(1 - D);
dsp_set_long_acc(D, ac1 + ac2);
}
// ADDAX $acD, $axS