const runtime/internal/sys.SpAlign

3 uses

	runtime/internal/sys (current package)
		stubs.go#L11: const SpAlign = 1*(1-GoarchArm64) + 16*GoarchArm64 // SP alignment: 1 normally, 16 for ARM64

	runtime
		proc.go#L4034: 	totalSize += -totalSize & (sys.SpAlign - 1)                  // align to spAlign
		stack.go#L1248: 		minsize = sys.SpAlign

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