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rsx: Optimize 8-bit rounding logic a bit

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- NV hw does not like the raw use of round()
This commit is contained in:
kd-11
2022-01-16 16:59:46 +03:00
committed by kd-11
parent c38ca21a81
commit 3e794e7fdb
1 changed files with 3 additions and 2 deletions
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rpcs3/Emu/RSX/Program/GLSLCommon.cpp
+3 -2
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@@ -566,8 +566,9 @@ namespace glsl
OS << "// Workaround broken output rounding behavior\n"; OS << "// Workaround broken output rounding behavior\n";
if (props.srgb_output_rounding) if (props.srgb_output_rounding)
{ {
const auto scale = (props.supports_native_fp16) ? "float16_t(255.)" : "255."; const auto _255 = (props.supports_native_fp16) ? "f16vec4(255.)" : "vec4(255.)";
OS << "#define round_to_8bit(v4) (round(v4 * " << scale << ") / " << scale << ")\n\n"; const auto _1_over_2 = (props.supports_native_fp16) ? "f16vec4(0.5)" : "vec4(0.5)";
OS << "#define round_to_8bit(v4) (floor(fma(v4, " << _255 << ", " << _1_over_2 << ")) / " << _255 << ")\n\n";
} }
else else
{ {