postgresql

Commit Graph

Author	SHA1	Message	Date
Bruce Momjian	c8e1ba736b	Update copyright for 2023 Backpatch-through: 11	2023-01-02 15:00:37 -05:00
John Naylor	c6a43c25a8	Fix broken cast on MSVC Per buildfarm animal drongo, casting a vector type to the same type causes a compile error. We still need the cast on ARM64, so invent a wrapper function that does the casting only where necessary. Discussion: https://www.postgresql.org/message-id/CAFBsxsEouaTwbmpqV%2BEW2%3DwFbhw2vHRe26NQTRcd0%3DNaOFDy7A%40mail.gmail.com	2022-08-29 17:44:35 +07:00
John Naylor	f8f19f7086	Abstract some more architecture-specific details away from SIMD functionality Add a typedef to represent vectors containing four 32-bit integers, and add functions operating on them. Also separate out saturating subtraction into its own function. The motivation for this is to prepare for a future commit to add ARM NEON support. Nathan Bossart Reviewed by John Naylor and Tom Lane Discussion: https://www.postgresql.org/message-id/flat/CAFBsxsEyR9JkfbPcDXBRYEfdfC__OkwVGdwEAgY4Rv0cvw35EA%40mail.gmail.com#aba7a64b11503494ffd8dd27067626a9	2022-08-29 14:20:09 +07:00
John Naylor	e813e0e168	Add optimized functions for linear search within byte arrays In similar vein to `b6ef167564`, add pg_lfind8() and pg_lfind8_le() to search for bytes equal or less-than-or-equal to a given byte, respectively. To abstract away platform details, add helper functions and typedefs to simd.h. John Naylor and Nathan Bossart, per suggestion from Andres Freund Discussion: https://www.postgresql.org/message-id/CAFBsxsGzaaGLF%3DNuq61iRXTyspbO9rOjhSqFN%3DV6ozzmta5mXg%40mail.gmail.com	2022-08-26 14:03:39 +07:00
John Naylor	b6ef167564	Introduce optimized routine for linear searches of arrays Use SSE2 intrinsics to speed up the search, where available. Otherwise, use a simple 'for' loop. The motivation to add this now is to speed up XidInMVCCSnapshot(), which is the reason only unsigned 32-bit integer arrays are optimized. Other types are left for future work, as is the extension of this technique to non-x86 platforms. Nathan Bossart Reviewed by: Andres Freund, Bharath Rupireddy, Masahiko Sawada Discussion: https://postgr.es/m/20220713170950.GA3116318%40nathanxps13	2022-08-10 10:48:29 +07:00

5 Commits