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amonakov@mastodon.gamedev.place

@amonakov@mastodon.gamedev.place

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Someone on Lobsters wondered "how a modern compiler would fare against hand-optimized asm" in reference to Abrash's TransformVector (3x3 matrix-vector multiply) hand-written x87 routine in Quake.

A amonakov@mastodon.gamedev.place

@pervognsen that's because stores to 'out' can alias with other loads, you need a temporary or 'restrict': https://gcc.godbolt.org/z/e8hxEGxor

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