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Fix broken implementation of firstbit family of opcodes

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baldurk
2016-07-26 15:04:14 +02:00
parent c6defdf1ef
commit 49cd21c8cc
1 changed files with 14 additions and 3 deletions
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renderdoc/driver/shaders/dxbc/dxbc_debug.cpp
+14 -3
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@@ -1136,7 +1136,11 @@ State State::GetNext(GlobalState &global, State quad[4]) const
ShaderVariable ret("", 0U, 0U, 0U, 0U);
for(size_t i = 0; i < 4; i++)
ret.value.uv[i] = BitScanReverse((DWORD *)&srcOpers[0].value.uv[i], ~0U);
{
unsigned char found = BitScanReverse((DWORD *)&ret.value.uv[i], srcOpers[0].value.uv[i]);
if(found == 0)
ret.value.uv[i] = ~0U;
}
s.SetDst(op.operands[0], op, ret);
break;
@@ -1146,7 +1150,11 @@ State State::GetNext(GlobalState &global, State quad[4]) const
ShaderVariable ret("", 0U, 0U, 0U, 0U);
for(size_t i = 0; i < 4; i++)
ret.value.uv[i] = BitScanForward((DWORD *)&srcOpers[0].value.uv[i], ~0U);
{
unsigned char found = BitScanForward((DWORD *)&ret.value.uv[i], srcOpers[0].value.uv[i]);
if(found == 0)
ret.value.uv[i] = ~0U;
}
s.SetDst(op.operands[0], op, ret);
break;
@@ -1161,7 +1169,10 @@ State State::GetNext(GlobalState &global, State quad[4]) const
if(srcOpers[0].value.iv[i] < 0)
u = ~u;
ret.value.uv[i] = BitScanReverse((DWORD *)&u, ~0U);
unsigned char found = BitScanReverse((DWORD *)&ret.value.uv[i], u);
if(found == 0)
ret.value.uv[i] = ~0U;
}
s.SetDst(op.operands[0], op, ret);