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UNPACK D3DCOLOR and EXTRACT INT32 variable.

This commit is contained in:
Ben Vanik 2014-02-02 13:04:42 -08:00
parent 544d453691
commit bc54fc1ae8
1 changed files with 45 additions and 7 deletions
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48
src/alloy/backend/x64/lowering/lowering_sequences.cc
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@ -64,6 +64,8 @@ enum XmmConst {
XMMSignMaskPD = 9,
XMMByteSwapMask = 10,
XMMPermuteControl15 = 11,
XMMUnpackD3DCOLOR = 12,
XMMOneOver255 = 13,
};
static const vec128_t xmm_consts[] = {
/* XMMZero */ vec128f(0.0f, 0.0f, 0.0f, 0.0f),
@ -78,6 +80,8 @@ static const vec128_t xmm_consts[] = {
/* XMMSignMaskPD */ vec128i(0x00000000u, 0x80000000u, 0x00000000u, 0x80000000u),
/* XMMByteSwapMask */ vec128i(0x00010203u, 0x04050607u, 0x08090A0Bu, 0x0C0D0E0Fu),
/* XMMPermuteControl15 */ vec128b(15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15),
/* XMMUnpackD3DCOLOR */ vec128i(0xFFFFFF02, 0xFFFFFF01, 0xFFFFFF00, 0xFFFFFF02),
/* XMMOneOver255 */ vec128f(1.0f / 255.0f, 1.0f / 255.0f, 1.0f / 255.0f, 1.0f / 255.0f),
};
// Use consts by first loading the base register then accessing memory:
// e.mov(e.rax, XMMCONSTBASE)
@ -124,6 +128,12 @@ static vec128_t lvsr_table[17] = {
vec128b( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16),
vec128b( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15),
};
static vec128_t extract_table_32[4] = {
vec128b( 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
vec128b( 7, 6, 5, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
vec128b(11, 10, 9, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
vec128b(15, 14, 13, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
};
// A note about vectors:
// Alloy represents vectors as xyzw pairs, with indices 0123.
@ -2788,16 +2798,30 @@ table->AddSequence(OPCODE_EXTRACT, [](X64Emitter& e, Instr*& i) {
}
e.EndOp(dest, src);
} else if (i->dest->type == INT32_TYPE) {
if (i->src2.value->IsConstant()) {
Reg32 dest;
Xmm src;
e.BeginOp(i->dest, dest, REG_DEST,
i->src1.value, src, 0);
if (i->src2.value->IsConstant()) {
e.pextrd(dest, src, i->src2.value->constant.i8);
} else {
UNIMPLEMENTED_SEQ();
}
e.EndOp(dest, src);
} else {
Reg32 dest;
Xmm src;
Reg8 sel;
e.BeginOp(i->dest, dest, REG_DEST,
i->src1.value, src, 0,
i->src2.value, sel, 0);
// Get the desired word in xmm0, then extract that.
e.mov(TEMP_REG, sel);
e.and(TEMP_REG, 0x03);
e.shl(TEMP_REG, 4);
e.mov(e.rax, (uintptr_t)extract_table_32);
e.movaps(e.xmm0, e.ptr[e.rax + TEMP_REG]);
e.vpshufb(e.xmm0, src, e.xmm0);
e.pextrd(dest, e.xmm0, 0);
e.EndOp(dest, src, sel);
}
} else if (i->dest->type == FLOAT32_TYPE) {
Reg32 dest;
Xmm src;
@ -3057,7 +3081,21 @@ table->AddSequence(OPCODE_PACK, [](X64Emitter& e, Instr*& i) {
table->AddSequence(OPCODE_UNPACK, [](X64Emitter& e, Instr*& i) {
if (i->flags == PACK_TYPE_D3DCOLOR) {
UNIMPLEMENTED_SEQ();
// ARGB (WXYZ) -> RGBA (XYZW)
// XMLoadColor
// int32_t src = (int32_t)src1.iw;
// dest.f4[0] = (float)((src >> 16) & 0xFF) * (1.0f / 255.0f);
// dest.f4[1] = (float)((src >> 8) & 0xFF) * (1.0f / 255.0f);
// dest.f4[2] = (float)(src & 0xFF) * (1.0f / 255.0f);
// dest.f4[3] = (float)((src >> 24) & 0xFF) * (1.0f / 255.0f);
XmmUnaryOp(e, i, 0, [](X64Emitter& e, Instr& i, const Xmm& dest, const Xmm& src) {
// src = ZZYYXXWW
// unpack to 000000ZZ,000000YY,000000XX,000000WW
e.mov(e.rax, XMMCONSTBASE);
e.vpshufb(dest, src, XMMCONST(e.rax, XMMUnpackD3DCOLOR));
// mult by 1/255
e.vmulps(dest, XMMCONST(e.rax, XMMOneOver255));
});
} else if (i->flags == PACK_TYPE_FLOAT16_2) {
// 1 bit sign, 5 bit exponent, 10 bit mantissa
// D3D10 half float format