Message 266209 - Python tracker

Message266209

Author	Demur Rumed
Recipients	Demur Rumed
Date	2016-05-24.00:08:18
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1464048499.12.0.811410474415.issue27097@psf.upfronthosting.co.za>
In-reply-to

Content
Attached is a patch based off #26647 which converts ceval to read opcode/oparg by casting next_instr to an unsigned short. I don't believe we need to complicate the code with checking the pointer alignment of the instruction stream; some effort must be gone through to generate bytecode off alignment, & if the issue comes up it's because someone's using the C API on a CPU that doesn't support unaligned reads to generate their own custom bytecode. Anyways pybench went from 16.5 on wordcode to 16.0 for me The change works through replacing NEXTOP/NEXTARG with a NEXTOPARG macro

Content

Attached is a patch based off #26647 which converts ceval to read opcode/oparg by casting next_instr to an unsigned short. I don't believe we need to complicate the code with checking the pointer alignment of the instruction stream; some effort must be gone through to generate bytecode off alignment, & if the issue comes up it's because someone's using the C API on a CPU that doesn't support unaligned reads to generate their own custom bytecode. Anyways pybench went from 16.5 on wordcode to 16.0 for me

The change works through replacing NEXTOP/NEXTARG with a NEXTOPARG macro

History
Date	User	Action	Args
2016-05-24 00:08:19	Demur Rumed	set	recipients: + Demur Rumed
2016-05-24 00:08:19	Demur Rumed	set	messageid: <1464048499.12.0.811410474415.issue27097@psf.upfronthosting.co.za>
2016-05-24 00:08:19	Demur Rumed	link	issue27097 messages
2016-05-24 00:08:18	Demur Rumed	create