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936546dcbc
Eliminate the separate 'len' variable from the loops, and also use the 4 byte instruction. This shaves off a few more cycles. Even though this routine that uses the special SSE 4.2 instructions is much faster than a generic routine, it's still a hot spot, so let's make it as fast as possible. Change the configure test to not test _mm_crc32_u64. That variant is only available in the 64-bit x86-64 architecture, not in 32-bit x86. Modify pg_comp_crc32c_sse42 so that it only uses _mm_crc32_u64 on x86-64. With these changes, the SSE accelerated CRC-32C implementation can also be used on 32-bit x86 systems. This also fixes the 32-bit MSVC build. |
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| .. | ||
| ac_func_accept_argtypes.m4 | ||
| acx_pthread.m4 | ||
| c-compiler.m4 | ||
| c-library.m4 | ||
| config.guess | ||
| config.sub | ||
| docbook.m4 | ||
| general.m4 | ||
| install-sh | ||
| libtool.m4 | ||
| Makefile | ||
| missing | ||
| perl.m4 | ||
| prep_buildtree | ||
| programs.m4 | ||
| python.m4 | ||
| tcl.m4 | ||
| test_quiet_include.h | ||