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Bug 929

Summary: Remove MMX mixers?
Product: SDL Reporter: Ryan C. Gordon <icculus>
Component: audioAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: HG 2.0   
Hardware: Other   
OS: All   

Description Ryan C. Gordon 2010-01-09 23:48:51 UTC 
We disabled the MMX mixers for 1.2.14. They produce garbage audio.

I'm inclined to remove the code outright for 1.3. Surely we should not be targeting MMX at this point anyhow.

Grep for SDL_BUGGY_MMX_MIXERS in 1.3.

--ryan.
Comment 1 Sam Lantinga 2010-01-10 01:34:48 UTC 
Ryan:  The compiler probably generates better SSE code from the C code at this point.
 Sam:  Ah, true
And I haven't timed it, but I imagine on modern CPUs the hit is from memory access rather than math
Comment 2 Sam Lantinga 2011-01-20 18:10:22 UTC 
Ryan's going to remove these.
Comment 3 Sam Lantinga 2012-01-08 00:09:35 UTC 
This was done.