- 01 8月, 1999 1 次提交
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由 Andy Polyakov 提交于
the remainder left in %edx. Here is the resulting performance improvement matrix (improvement as a result of this *and* previous tune-up committed two days ago). The results were obtained by profiling the "div" part of the crypto/bn/bnspeed.c. CPU BN_div bn_div_words overall comment ------------------------------------------------------------------------ PII +16% accumulated by +2-3% PII multiplies damn fast! Taking inlining multiplication out of the loop didn't make too much difference. Eliminating of the multiplication involved in remainder calculation is the major factor. Pentium +45% accumulated by +7-9% mull isn't that fast and replacing inlining multiplications with additions in the loop has more visible effect:-) MIPS +75% +12% +20-25% In addition to the taking mults R10000 out of the loop (giving 12% in the asm/mips3.s) three mults were eliminated in BN_div. Alpha +30% +50% +10-15% Same as above. But remember that EV4 bn_div_words is a C implementation. It takes 4 Alpha mults in C to do the same thing as 1 MIPS mult in assembler does. So the effect (50%) is more impressive. But not the overall one... Well, if Alpha bn_mul_add would be implemented in assembler overall improvement would be closer to MIPS...
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- 30 7月, 1999 1 次提交
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由 Andy Polyakov 提交于
loop body and replace 'em with addition/subtraction.
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- 10 6月, 1999 1 次提交
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由 Ulf Möller 提交于
Submitted by: Andy Polyakov <appro@fy.chalmers.se>
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- 05 6月, 1999 1 次提交
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由 Ben Laurie 提交于
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- 20 4月, 1999 1 次提交
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由 Ulf Möller 提交于
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- 21 12月, 1998 3 次提交
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由 Ralf S. Engelschall 提交于
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由 Ralf S. Engelschall 提交于
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由 Ralf S. Engelschall 提交于
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