Re: [Qemu-devel] [PATCH v4 1/2] hw/arm/acpi: simplify AML bit and/or statement

[Igor Mammedov <imammedo@redhat.com>]

On Wed, 6 Mar 2019 21:36:56 +0800
Heyi Guo <guoheyi@huawei.com> wrote:

> The last argument of AML bit and/or statement is the target variable,
> so we don't need to use a NULL target and then an additional store
> operation; a single bit and/or statement is enough.

s: a single bit and/or : using just aml_and() or aml_and() "

With commit message fixed up:

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> 
> Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Cc: Igor Mammedov <imammedo@redhat.com>
> Suggested-by: Igor Mammedov <imammedo@redhat.com>
> Signed-off-by: Heyi Guo <guoheyi@huawei.com>
> ---
>  hw/arm/virt-acpi-build.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index d7e2e48..cebec4c 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -265,17 +265,17 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
>          aml_create_dword_field(aml_arg(3), aml_int(8), "CDW3"));
>      aml_append(ifctx, aml_store(aml_name("CDW2"), aml_name("SUPP")));
>      aml_append(ifctx, aml_store(aml_name("CDW3"), aml_name("CTRL")));
> -    aml_append(ifctx, aml_store(aml_and(aml_name("CTRL"), aml_int(0x1D), NULL),
> -                                aml_name("CTRL")));
> +    aml_append(ifctx, aml_and(aml_name("CTRL"), aml_int(0x1D),
> +                              aml_name("CTRL")));
>  
>      ifctx1 = aml_if(aml_lnot(aml_equal(aml_arg(1), aml_int(0x1))));
> -    aml_append(ifctx1, aml_store(aml_or(aml_name("CDW1"), aml_int(0x08), NULL),
> -                                 aml_name("CDW1")));
> +    aml_append(ifctx1, aml_or(aml_name("CDW1"), aml_int(0x08),
> +                              aml_name("CDW1")));
>      aml_append(ifctx, ifctx1);
>  
>      ifctx1 = aml_if(aml_lnot(aml_equal(aml_name("CDW3"), aml_name("CTRL"))));
> -    aml_append(ifctx1, aml_store(aml_or(aml_name("CDW1"), aml_int(0x10), NULL),
> -                                 aml_name("CDW1")));
> +    aml_append(ifctx1, aml_or(aml_name("CDW1"), aml_int(0x10),
> +                              aml_name("CDW1")));
>      aml_append(ifctx, ifctx1);
>  
>      aml_append(ifctx, aml_store(aml_name("CTRL"), aml_name("CDW3")));
> @@ -283,8 +283,8 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
>      aml_append(method, ifctx);
>  
>      elsectx = aml_else();
> -    aml_append(elsectx, aml_store(aml_or(aml_name("CDW1"), aml_int(4), NULL),
> -                                  aml_name("CDW1")));
> +    aml_append(elsectx, aml_or(aml_name("CDW1"), aml_int(4),
> +                               aml_name("CDW1")));
>      aml_append(elsectx, aml_return(aml_arg(3)));
>      aml_append(method, elsectx);
>      aml_append(dev, method);