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The computed value is only used when the register is equal to zero, so we can fully precompute it and materialize the constant instead. In other words, we change from ``` return reg == 0 ? (reg | 1ULL << 63) : reg; ``` to ``` return reg == 0 ? 1ULL << 63 : reg; ``` The number of instructions remains the same, but we eliminate an unnecessary dependency on the register value. Before: 0xb241037a orr x26, x27, #0x8000000000000000 0xeb1f037f cmp x27, xzr 0x9a9a137b csel x27, x27, x26, ne After: 0xd2f0001a mov x26, #-0x8000000000000000 ; =-9223372036854775808 0xeb1f037f cmp x27, xzr 0x9a9a137b csel x27, x27, x26, ne |
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| .. | ||
| AudioCommon | ||
| Common | ||
| Core | ||
| DiscIO | ||
| DolphinNoGUI | ||
| DolphinQt | ||
| DolphinTool | ||
| InputCommon | ||
| MacUpdater | ||
| UICommon | ||
| UpdaterCommon | ||
| VideoBackends | ||
| VideoCommon | ||
| WinUpdater | ||
| CMakeLists.txt | ||
| DolphinLib.ARM64.props | ||
| DolphinLib.props | ||
| DolphinLib.vcxproj | ||
| DolphinLib.vcxproj.user | ||
| DolphinLib.x64.props | ||
| VersionInfo.plist.in | ||