What is ISA K3D x86 Extension?
The Microsoft MASM language includes a directive .K3D
. Documents are sparse:
Includes assembly of K3D instructions.
Inference from other directives seems to be an x86 ISA extension.
I have not found an instance of this term in all Intel Architecture documents. A Google search on intel.com shows 8 results altogether, with nothing useful. A Google search on microsoft.com only finds MASM documents.
What is ISA K3D x86 Extension? Are the documents available?
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The directive .K3D
was added to MASM in version 6.13.
From http://www.amd-k6.com/wp-content/uploads/2012/07/22621.pdf page 8:
To enable MMX instructions, use the .MMX directive.
To enable 3DNow! instructions, use the .K3D directive after using the .MMX directive.
It depends on the order.
If I read the AMD docs correctly, you need to enable .MMX
before enabling .K3D
.
The etymology of this term is as follows:
AMD named its processors K5, K6, K7, etc.
This is consistent with P5, P6 that Intel used.
Thus, K stands for "AMD-K" and 3D cards for "3D-Now".
The Masm release notes for 6.13 are as rare as the docs:
.K3D Directive in MASM 6.13
-------------------------------------------------- -------------------
The .K3D directive enables assembly of K3D instructions. Users can
check to see that @Version is 613 or higher to tell if the version
of MASM being used supports the .K3D directive and K3D instructions.
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