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rsx/codegen: Workaround for borked hardware

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- Bitwise or does not evaluate correctly for some hardware.
  Substitute with subtraction instead.
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kd-11 2020-09-28 21:47:44 +03:00 committed by kd-11
parent 09cddc84be
commit 04ff7913b4
1 changed files with 4 additions and 2 deletions
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6
rpcs3/Emu/RSX/Common/GLSLCommon.h
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@ -284,16 +284,18 @@ namespace glsl
" return (swap)? _set_bits(y, x, 8, 8) : _set_bits(x, y, 8, 8);\n"
"}\n\n"
// NOTE: (int(n) or int(n)) is broken on some NVIDIA and INTEL hardware when the sign bit is involved.
// See https://github.com/RPCS3/rpcs3/issues/8990
"vec4 sext(const in ivec4 bits)\n"
"{\n"
" // convert raw 16 bit values into signed 32-bit float4 counterpart\n"
" bvec4 sign_check = lessThan(bits, ivec4(0x8000));\n"
" return _select(bits | ivec4(0xFFFF0000), bits, sign_check);\n"
" return _select(bits - 65536, bits, sign_check);\n"
"}\n\n"
"float sext(const in int bits)\n"
"{\n"
" return (bits < 0x8000) ? float(bits) : float(bits | 0xFFFF0000); \n"
" return (bits < 0x8000) ? float(bits) : float(bits - 65536); \n"
"}\n\n"
"vec4 fetch_attribute(const in attribute_desc desc, const in int vertex_id, usamplerBuffer input_stream)\n"