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DSPLLE - 0xa100 figured out = abs(), small mul fix, cleaning, some extra comments

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5216 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Marko Pusljar
2010-03-19 21:53:41 +00:00
parent 4f56d8144b
commit 503bf545a3
9 changed files with 161 additions and 256 deletions
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187
Source/Core/DSPCore/Src/DspIntMultiplier.cpp
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@ -27,7 +27,7 @@
namespace DSPInterpreter {
// Only MULX family instructions have unsigned support.
// Only MULX family instructions have unsigned/mixed support.
inline s64 dsp_get_multiply_prod(u16 a, u16 b, u8 sign)
{
s64 prod;
@ -37,7 +37,7 @@ inline s64 dsp_get_multiply_prod(u16 a, u16 b, u8 sign)
else if ((sign == 2) && (g_dsp.r[DSP_REG_SR] & SR_MUL_UNSIGNED)) //mixed
prod = (u64)a * (s64)(s16)b;
else
prod = (s64)(s16)a * (s64)(s16)b;
prod = (s64)(s16)a * (s64)(s16)b; //signed
// Conditionally multiply by 2.
if ((g_dsp.r[DSP_REG_SR] & SR_MUL_MODIFY) == 0)
@ -64,6 +64,40 @@ s64 dsp_multiply_sub(u16 a, u16 b, u8 sign = 0)
return prod;
}
s64 dsp_multiply_mulx(u8 axh0, u8 axh1, u16 val1, u16 val2)
{
s64 result;
if ((axh0==0) && (axh1==0)) // axl.0 * axl.1
{
result = dsp_multiply(val1, val2, 1); // unsigned support ON if both ax?.l regs are used
}
else if ((axh0==0) && (axh1==1)) // axl.0 * axh.1
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
result = dsp_multiply(val1, val2, 2);
else if ((val1 >= 0x8000) && (val2 < 0x8000))
result = dsp_multiply(val1, val2, 1);
else
result = dsp_multiply(val1, val2, 0);
}
else if ((axh0==1) && (axh1==0)) // axh.0 * axl.1
{
if ((val2 >= 0x8000) && (val1 >= 0x8000))
result = dsp_multiply(val2, val1, 2);
else if ((val2 >= 0x8000) && (val1 < 0x8000))
result = dsp_multiply(val2, val1, 1);
else
result = dsp_multiply(val2, val1, 0);
}
else // axh.0 * axh.1
{
result = dsp_multiply(val1, val2, 0); // unsigned support OFF if both ax?.h regs are used
}
return result;
}
//----
// CLRP
@ -74,11 +108,14 @@ void clrp(const UDSPInstruction& opc)
// Magic numbers taken from duddie's doc
// These are probably a bad idea to put here.
zeroWriteBackLog();
/*
g_dsp.r[DSP_REG_PRODL] = 0x0000;
g_dsp.r[DSP_REG_PRODM] = 0xfff0;
g_dsp.r[DSP_REG_PRODH] = 0x00ff;
g_dsp.r[DSP_REG_PRODM2] = 0x0010;
*/
// 00ff_(fff0 + 0010)_0000 = 0100_0000_0000, conveniently, lower 40bits = 0
dsp_set_long_prod(0); // if we are doing it wrong then let's be consistent
}
// TSTPROD
@ -140,7 +177,7 @@ void movpz(const UDSPInstruction& opc)
{
u8 dreg = (opc.hex >> 8) & 0x01;
s64 acc = dsp_get_long_prod_prodl_zero();
s64 acc = dsp_get_long_prod_round_prodl();
zeroWriteBackLog();
@ -159,7 +196,7 @@ void addpaxz(const UDSPInstruction& opc)
u8 dreg = (opc.hex >> 8) & 0x1;
u8 sreg = (opc.hex >> 9) & 0x1;
s64 prod = dsp_get_long_prod_prodl_zero();
s64 prod = dsp_get_long_prod_round_prodl();
s64 ax = dsp_get_long_acx(sreg);
s64 res = prod + (ax & ~0xffff);
@ -264,7 +301,7 @@ void mulmvz(const UDSPInstruction& opc)
u8 rreg = (opc.hex >> 8) & 0x1;
u8 sreg = (opc.hex >> 11) & 0x1;
s64 acc = dsp_get_long_prod_prodl_zero();
s64 acc = dsp_get_long_prod_round_prodl();
u16 axl = dsp_get_ax_l(sreg);
u16 axh = dsp_get_ax_h(sreg);
s64 prod = dsp_multiply(axl, axh);
@ -289,39 +326,7 @@ void mulx(const UDSPInstruction& opc)
u16 val1 = (sreg == 0) ? dsp_get_ax_l(0) : dsp_get_ax_h(0);
u16 val2 = (treg == 0) ? dsp_get_ax_l(1) : dsp_get_ax_h(1);
s64 prod;
if (!treg && !sreg)
{
prod = dsp_multiply(val1, val2, 1);
}
else if (treg && !sreg)
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 2);
else if ((val1 >= 0x8000) && (val2 < 0x8000))
prod = dsp_multiply(val1, val2, 1);
else
prod = dsp_multiply(val1, val2, 0);
}
else if (!treg && sreg)
{
if ((val2 >= 0x8000) && (val1 >= 0x8000))
prod = dsp_multiply(val2, val1, 2);
else if ((val2 >= 0x8000) && (val1 < 0x8000))
prod = dsp_multiply(val2, val1, 1);
else
prod = dsp_multiply(val2, val1, 0);
}
else
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 1);
else if ((val1 >= 0x8000) || (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 0);
else
prod = dsp_multiply(val1, val2, 1);
}
s64 prod = dsp_multiply_mulx(sreg, treg, val1, val2);
zeroWriteBackLog();
@ -344,39 +349,7 @@ void mulxac(const UDSPInstruction& opc)
s64 acc = dsp_get_long_acc(rreg) + dsp_get_long_prod();
u16 val1 = (sreg == 0) ? dsp_get_ax_l(0) : dsp_get_ax_h(0);
u16 val2 = (treg == 0) ? dsp_get_ax_l(1) : dsp_get_ax_h(1);
s64 prod;
if (!treg && !sreg)
{
prod = dsp_multiply(val1, val2, 1);
}
else if (treg && !sreg)
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 2);
else if ((val1 >= 0x8000) && (val2 < 0x8000))
prod = dsp_multiply(val1, val2, 1);
else
prod = dsp_multiply(val1, val2, 0);
}
else if (!treg && sreg)
{
if ((val2 >= 0x8000) && (val1 >= 0x8000))
prod = dsp_multiply(val2, val1, 2);
else if ((val2 >= 0x8000) && (val1 < 0x8000))
prod = dsp_multiply(val2, val1, 1);
else
prod = dsp_multiply(val2, val1, 0);
}
else
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 1);
else if ((val1 >= 0x8000) || (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 0);
else
prod = dsp_multiply(val1, val2, 1);
}
s64 prod = dsp_multiply_mulx(sreg, treg, val1, val2);
zeroWriteBackLog();
@ -401,39 +374,7 @@ void mulxmv(const UDSPInstruction& opc)
s64 acc = dsp_get_long_prod();
u16 val1 = (sreg == 0) ? dsp_get_ax_l(0) : dsp_get_ax_h(0);
u16 val2 = (treg == 0) ? dsp_get_ax_l(1) : dsp_get_ax_h(1);
s64 prod;
if (!treg && !sreg)
{
prod = dsp_multiply(val1, val2, 1);
}
else if (treg && !sreg)
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 2);
else if ((val1 >= 0x8000) && (val2 < 0x8000))
prod = dsp_multiply(val1, val2, 1);
else
prod = dsp_multiply(val1, val2, 0);
}
else if (!treg && sreg)
{
if ((val2 >= 0x8000) && (val1 >= 0x8000))
prod = dsp_multiply(val2, val1, 2);
else if ((val2 >= 0x8000) && (val1 < 0x8000))
prod = dsp_multiply(val2, val1, 1);
else
prod = dsp_multiply(val2, val1, 0);
}
else
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 1);
else if ((val1 >= 0x8000) || (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 0);
else
prod = dsp_multiply(val1, val2, 1);
}
s64 prod = dsp_multiply_mulx(sreg, treg, val1, val2);
zeroWriteBackLog();
@ -456,42 +397,10 @@ void mulxmvz(const UDSPInstruction& opc)
u8 treg = (opc.hex >> 11) & 0x1;
u8 sreg = (opc.hex >> 12) & 0x1;
s64 acc = dsp_get_long_prod_prodl_zero();
s64 acc = dsp_get_long_prod_round_prodl();
u16 val1 = (sreg == 0) ? dsp_get_ax_l(0) : dsp_get_ax_h(0);
u16 val2 = (treg == 0) ? dsp_get_ax_l(1) : dsp_get_ax_h(1);
s64 prod;
if (!treg && !sreg)
{
prod = dsp_multiply(val1, val2, 1);
}
else if (treg && !sreg)
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 2);
else if ((val1 >= 0x8000) && (val2 < 0x8000))
prod = dsp_multiply(val1, val2, 1);
else
prod = dsp_multiply(val1, val2, 0);
}
else if (!treg && sreg)
{
if ((val2 >= 0x8000) && (val1 >= 0x8000))
prod = dsp_multiply(val2, val1, 2);
else if ((val2 >= 0x8000) && (val1 < 0x8000))
prod = dsp_multiply(val2, val1, 1);
else
prod = dsp_multiply(val2, val1, 0);
}
else
{
if ((val1 >= 0x8000) && (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 1);
else if ((val1 >= 0x8000) || (val2 >= 0x8000))
prod = dsp_multiply(val1, val2, 0);
else
prod = dsp_multiply(val1, val2, 1);
}
s64 prod = dsp_multiply_mulx(sreg, treg, val1, val2);
zeroWriteBackLog();
@ -586,7 +495,7 @@ void mulcmvz(const UDSPInstruction& opc)
u8 treg = (opc.hex >> 11) & 0x1;
u8 sreg = (opc.hex >> 12) & 0x1;
s64 acc = dsp_get_long_prod_prodl_zero();
s64 acc = dsp_get_long_prod_round_prodl();
u16 accm = dsp_get_acc_m(sreg);
u16 axh = dsp_get_ax_h(treg);
s64 prod = dsp_multiply(accm, axh);