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jit-ir: Add some descriptions of mnemonics.

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Sometimes I forget what vhdp etc. meant, let's make the VFPU code a bit
more accessible.
This commit is contained in:
Unknown W. Brackets 2016-05-14 14:21:53 -07:00
parent d4e45f4e0a
commit 7c9f368d63
1 changed files with 49 additions and 2 deletions
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51
Core/MIPS/IR/IRCompVFPU.cpp
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@ -315,6 +315,9 @@ namespace MIPSComp {
DISABLE;
}
// Vector init
// d[N] = CONST[N]
VectorSize sz = GetVecSize(op);
int type = (op >> 16) & 0xF;
int vd = _VD;
@ -338,6 +341,9 @@ namespace MIPSComp {
DISABLE;
}
// Vector identity row
// d[N] = IDENTITY[N,m]
int vd = _VD;
VectorSize sz = GetVecSize(op);
u8 dregs[4];
@ -374,6 +380,9 @@ namespace MIPSComp {
DISABLE;
}
// Matrix init
// d[N,M] = CONST[N,M]
// Not really about trying here, it will work if enabled.
VectorSize vsz = GetVectorSize(sz);
u8 vecs[4];
@ -412,6 +421,10 @@ namespace MIPSComp {
DISABLE;
}
// Vector homogenous dot product
// d[0] = s[0 .. n-2] dot t[0 .. n-2] + t[n-1]
// Note: s[n-1] is ignored.
int vd = _VD;
int vs = _VS;
int vt = _VT;
@ -448,6 +461,11 @@ namespace MIPSComp {
if (js.HasUnknownPrefix())
DISABLE;
// Vector horizontal add
// d[0] = s[0] + ... s[n-1]
// Vector horizontal average
// d[0] = (s[0] + ... s[n-1]) / n
VectorSize sz = GetVecSize(op);
int n = GetNumVectorElements(sz);
@ -480,6 +498,9 @@ namespace MIPSComp {
DISABLE;
}
// Vector dot product
// d[0] = s[0 .. n-1] dot t[0 .. n-1]
int vd = _VD;
int vs = _VS;
int vt = _VT;
@ -514,6 +535,9 @@ namespace MIPSComp {
if (js.HasUnknownPrefix())
DISABLE;
// Vector arithmetic
// d[N] = OP(s[N], t[N]) (see below)
// Check that we can support the ops, and prepare temporary values for ops that need it.
bool allowSIMD = true;
switch (op >> 26) {
@ -672,6 +696,9 @@ namespace MIPSComp {
if (js.HasUnknownPrefix())
DISABLE;
// Vector unary operation
// d[N] = OP(s[N]) (see below)
int vs = _VS;
int vd = _VD;
@ -787,6 +814,9 @@ namespace MIPSComp {
DISABLE;
}
// Vector integer to float
// d[N] = float(S[N]) * mult
VectorSize sz = GetVecSize(op);
int n = GetNumVectorElements(sz);
@ -878,11 +908,12 @@ namespace MIPSComp {
EatPrefix();
}
// Good above
void IRFrontend::Comp_Vmfvc(MIPSOpcode op) {
CONDITIONAL_DISABLE;
// Vector Move from vector control reg
// S[0] = VFPU_CTRL[i]
int vs = _VS;
int imm = op & 0xFF;
if (imm >= 128 && imm < 128 + VFPU_CTRL_MAX) {
@ -892,11 +923,17 @@ namespace MIPSComp {
// } else {
ir.Write(IROp::VfpuCtrlToReg, IRTEMP_0, imm - 128);
ir.Write(IROp::FMovFromGPR, vfpuBase + voffset[vs], IRTEMP_0);
} else {
DISABLE;
}
}
void IRFrontend::Comp_Vmtvc(MIPSOpcode op) {
CONDITIONAL_DISABLE;
// Vector Move from vector control reg
// VFPU_CTRL[i] = S[0]
int vs = _VS;
int imm = op & 0xFF;
if (imm >= 128 && imm < 128 + VFPU_CTRL_MAX) {
@ -914,6 +951,9 @@ namespace MIPSComp {
void IRFrontend::Comp_Vmmov(MIPSOpcode op) {
CONDITIONAL_DISABLE;
// Matrix move
// D[N,M] = S[N,M]
int vs = _VS;
int vd = _VD;
// This probably ignores prefixes for all sane intents and purposes.
@ -980,6 +1020,9 @@ namespace MIPSComp {
DISABLE;
}
// Vector scale, vector by scalar
// d[N] = s[N] * t[0]
VectorSize sz = GetVecSize(op);
int n = GetNumVectorElements(sz);
@ -1134,6 +1177,10 @@ namespace MIPSComp {
DISABLE;
}
// Vertex transform, vector by matrix
// d[N] = s[N*m .. N*m + n-1] dot t[0 .. n-1]
// Homogenous means t[n-1] is treated as 1.
VectorSize sz = GetVecSize(op);
MatrixSize msz = GetMtxSize(op);
int n = GetNumVectorElements(sz);