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acpi: extend aml_add() to accept target argument

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it allows to express following ASL expression:
 Add(arg1, arg2, result)

usecases that do not need to store result
should pass NULL as 3rd arg that would express
 Add(arg1, arg2,)
construct.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
This commit is contained in:
Igor Mammedov 2015-12-10 00:41:02 +01:00 • committed by Michael S. Tsirkin
parent 439e2a6e10
commit 20ca520884
3 changed files with 4 additions and 4 deletions
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2
hw/i386/acpi-build.c
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@ -670,7 +670,7 @@ static Aml *build_prt(void)
aml_store(aml_shiftright(pin, aml_int(2)), slot));
/* lnk_idx = (slot + pin) & 3 */
aml_append(while_ctx,
aml_store(aml_and(aml_add(pin, slot), aml_int(3)), lnk_idx));
aml_store(aml_and(aml_add(pin, slot, NULL), aml_int(3)), lnk_idx));
/* route[2] = "LNK[D|A|B|C]", selection based on pin % 3 */
aml_append(while_ctx, initialize_route(route, "LNKD", lnk_idx, 0));