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spu: Reimplement FCGT and FCMGT to handle corner cases (such as comparisons against infinites and denormals)
- Also optimize FMA/FMS/FNMS for recompiler
This commit is contained in:
kd-11
parent
9e7a42d057
commit
41d921808b
2 changed files with 161 additions and 39 deletions
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@ -1674,10 +1674,53 @@ void spu_recompiler::ANDC(spu_opcode_t op)
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void spu_recompiler::FCGT(spu_opcode_t op)
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{
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// reverted less-than
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const XmmLink& vb = XmmGet(op.rb, XmmType::Float);
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c->cmpps(vb, SPU_OFF_128(gpr, op.ra), 1);
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c->movaps(SPU_OFF_128(gpr, op.rt), vb);
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const auto last_exp_bit = XmmConst(_mm_set1_epi32(0x00800000));
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const auto all_exp_bits = XmmConst(_mm_set1_epi32(0x7f800000));
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const XmmLink& tmp0 = XmmAlloc();
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const XmmLink& tmp1 = XmmAlloc();
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const XmmLink& tmp2 = XmmAlloc();
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const XmmLink& tmp3 = XmmAlloc();
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const XmmLink& tmpv = XmmAlloc();
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c->pxor(tmp0, tmp0);
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c->pxor(tmp1, tmp1);
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c->cmpps(tmp0, SPU_OFF_128(gpr, op.ra), 3); //tmp0 is true if a is extended (nan/inf)
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c->cmpps(tmp1, SPU_OFF_128(gpr, op.rb), 3); //tmp1 is true if b is extended (nan/inf)
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//compute lower a and b
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c->movaps(tmp2, last_exp_bit);
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c->movaps(tmp3, last_exp_bit);
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c->pandn(tmp2, SPU_OFF_128(gpr, op.ra)); //tmp2 = lowered_a
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c->pandn(tmp3, SPU_OFF_128(gpr, op.rb)); //tmp3 = lowered_b
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//lower a if extended
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c->movaps(tmpv, tmp0);
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c->pand(tmpv, tmp2);
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c->pandn(tmp0, SPU_OFF_128(gpr, op.ra));
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c->orps(tmp0, tmpv);
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//lower b if extended
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c->movaps(tmpv, tmp1);
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c->pand(tmpv, tmp3);
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c->pandn(tmp1, SPU_OFF_128(gpr, op.rb));
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c->orps(tmp1, tmpv);
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//flush a to 0 if denormalized
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c->pxor(tmpv, tmpv);
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c->movaps(tmp2, SPU_OFF_128(gpr, op.ra));
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c->andps(tmp2, all_exp_bits);
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c->cmpps(tmp2, tmpv, 0);
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c->pandn(tmp2, tmp0);
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//flush b to 0 if denormalized
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c->movaps(tmp3, SPU_OFF_128(gpr, op.rb));
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c->andps(tmp3, all_exp_bits);
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c->cmpps(tmp3, tmpv, 0);
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c->pandn(tmp3, tmp1);
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c->cmpps(tmp3, tmp2, 1);
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c->movaps(SPU_OFF_128(gpr, op.rt), tmp3);
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}
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void spu_recompiler::DFCGT(spu_opcode_t op)
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@ -1729,13 +1772,46 @@ void spu_recompiler::ORC(spu_opcode_t op)
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void spu_recompiler::FCMGT(spu_opcode_t op)
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{
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// reverted less-than
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const XmmLink& vb = XmmGet(op.rb, XmmType::Float);
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const XmmLink& vi = XmmAlloc();
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c->movaps(vi, XmmConst(_mm_set1_epi32(0x7fffffff)));
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c->andps(vb, vi); // abs
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c->andps(vi, SPU_OFF_128(gpr, op.ra));
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c->cmpps(vb, vi, 1);
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c->movaps(SPU_OFF_128(gpr, op.rt), vb);
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// since comparison is absoulte, a > b if a is extended and b is not extended
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// flush denormals to zero to make zero == zero work
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const auto last_exp_bit = XmmConst(_mm_set1_epi32(0x00800000));
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const auto all_exp_bits = XmmConst(_mm_set1_epi32(0x7f800000));
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const auto remove_sign_bits = XmmConst(_mm_set1_epi32(0x7fffffff));
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const XmmLink& tmp0 = XmmAlloc();
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const XmmLink& tmp1 = XmmAlloc();
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const XmmLink& tmp2 = XmmAlloc();
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const XmmLink& tmp3 = XmmAlloc();
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const XmmLink& tmpv = XmmAlloc();
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c->pxor(tmp0, tmp0);
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c->pxor(tmp1, tmp1);
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c->cmpps(tmp0, SPU_OFF_128(gpr, op.ra), 3); //tmp0 is true if a is extended (nan/inf)
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c->cmpps(tmp1, SPU_OFF_128(gpr, op.rb), 3); //tmp1 is true if b is extended (nan/inf)
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//flush a to 0 if denormalized
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c->pxor(tmpv, tmpv);
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c->movaps(tmp2, SPU_OFF_128(gpr, op.ra));
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c->andps(tmp2, all_exp_bits);
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c->cmpps(tmp2, tmpv, 0);
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c->pandn(tmp2, SPU_OFF_128(gpr, op.ra));
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//flush b to 0 if denormalized
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c->movaps(tmp3, SPU_OFF_128(gpr, op.rb));
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c->andps(tmp3, all_exp_bits);
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c->cmpps(tmp3, tmpv, 0);
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c->pandn(tmp3, SPU_OFF_128(gpr, op.rb));
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//Set tmp1 to true where a is extended but b is not extended
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//This is a simplification since absolute values remove necessity of lowering
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c->xorps(tmp0, tmp1); //tmp0 is true when either a or b is extended
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c->pandn(tmp1, tmp0); //tmp1 is true if b is not extended and a is extended
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c->andps(tmp2, remove_sign_bits);
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c->andps(tmp3, remove_sign_bits);
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c->cmpps(tmp3, tmp2, 1);
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c->orps(tmp3, tmp1); //Force result to all true if a is extended but b is not
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c->movaps(SPU_OFF_128(gpr, op.rt), tmp3);
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}
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void spu_recompiler::DFCMGT(spu_opcode_t op)
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@ -2717,15 +2793,13 @@ void spu_recompiler::FNMS(spu_opcode_t op)
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const XmmLink& tmp_a = XmmAlloc();
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const XmmLink& tmp_b = XmmAlloc();
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c->movdqa(tmp_a, mask); //tmp_a = mask
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c->andps(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = a & mask
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c->cmpps(tmp_a, mask, 4); //tmp_a = tmp_a != mask
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c->andps(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = mask_a & va
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c->pxor(tmp_a, tmp_a); //tmp_a = 0
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c->cmpps(tmp_a, SPU_OFF_128(gpr, op.ra), 3); //tmp_a = ra == extended
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c->pandn(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = mask_a & ~ra_extended
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c->movdqa(tmp_b, mask); //tmp_b = mask
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c->andps(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = b & mask
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c->cmpps(tmp_b, mask, 4); //tmp_b = tmp_b != mask
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c->andps(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = mask_b & vb
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c->pxor(tmp_b, tmp_b); //tmp_b = 0
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c->cmpps(tmp_b, SPU_OFF_128(gpr, op.rb), 3); //tmp_b = rb == extended
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c->pandn(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = mask_b & ~rb_extended
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c->mulps(tmp_a, tmp_b);
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c->subps(vc, tmp_a);
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@ -2736,19 +2810,16 @@ void spu_recompiler::FMA(spu_opcode_t op)
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{
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const XmmLink& vc = XmmGet(op.rc, XmmType::Float);
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const auto mask = XmmConst(_mm_set1_epi32(0x7f800000));
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const XmmLink& tmp_a = XmmAlloc();
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const XmmLink& tmp_b = XmmAlloc();
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c->movdqa(tmp_a, mask); //tmp_a = mask
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c->andps(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = a & mask
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c->cmpps(tmp_a, mask, 4); //tmp_a = tmp_a != mask
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c->andps(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = mask_a & va
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c->pxor(tmp_a, tmp_a); //tmp_a = 0
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c->cmpps(tmp_a, SPU_OFF_128(gpr, op.ra), 3); //tmp_a = ra == extended
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c->pandn(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = mask_a & ~ra_extended
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c->movdqa(tmp_b, mask); //tmp_b = mask
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c->andps(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = b & mask
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c->cmpps(tmp_b, mask, 4); //tmp_b = tmp_b != mask
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c->andps(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = mask_b & vb
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c->pxor(tmp_b, tmp_b); //tmp_b = 0
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c->cmpps(tmp_b, SPU_OFF_128(gpr, op.rb), 3); //tmp_b = rb == extended
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c->pandn(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = mask_b & ~rb_extended
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c->mulps(tmp_a, tmp_b);
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c->addps(tmp_a, SPU_OFF_128(gpr, op.rc));
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@ -2763,15 +2834,13 @@ void spu_recompiler::FMS(spu_opcode_t op)
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const XmmLink& tmp_a = XmmAlloc();
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const XmmLink& tmp_b = XmmAlloc();
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c->movdqa(tmp_a, mask); //tmp_a = mask
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c->andps(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = a & mask
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c->cmpps(tmp_a, mask, 4); //tmp_a = tmp_a != mask
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c->andps(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = mask_a & va
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c->pxor(tmp_a, tmp_a); //tmp_a = 0
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c->cmpps(tmp_a, SPU_OFF_128(gpr, op.ra), 3); //tmp_a = ra == extended
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c->pandn(tmp_a, SPU_OFF_128(gpr, op.ra)); //tmp_a = mask_a & ~ra_extended
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c->movdqa(tmp_b, mask); //tmp_b = mask
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c->andps(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = b & mask
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c->cmpps(tmp_b, mask, 4); //tmp_b = tmp_b != mask
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c->andps(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = mask_b & vb
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c->pxor(tmp_b, tmp_b); //tmp_b = 0
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c->cmpps(tmp_b, SPU_OFF_128(gpr, op.rb), 3); //tmp_b = rb == extended
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c->pandn(tmp_b, SPU_OFF_128(gpr, op.rb)); //tmp_b = mask_b & ~rb_extended
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c->mulps(tmp_a, tmp_b);
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c->subps(tmp_a, SPU_OFF_128(gpr, op.rc));
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