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Last minute improvements before release. Added banchmark 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@1055 b3059339-0415-0410-9bf9-f77b7e298cf2
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nickols_k 2001-06-08 10:56:04 +00:00
parent b16c4deb0b
commit 49afe84db7
1 changed files with 7 additions and 2 deletions
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9
mp3lib/decode_k7.s
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@ -7,15 +7,20 @@
/// - Added new opcode PFNACC /// - Added new opcode PFNACC
/// - decreased number of opcodes (as it was suggested by k7 manual) /// - decreased number of opcodes (as it was suggested by k7 manual)
/// (using memory reference as operand of instructions) /// (using memory reference as operand of instructions)
/// - added PREFETCHW opcode. It has different semantic than k6-2 /// - added PREFETCHW opcode. It has different semantic on k7 than on k6-2
/// and saves 15-25 cpu clocks for athlon. /// and saves 15-25 cpu clocks for athlon.
/// - partial unrolling loops for removing slower MOVW insns. /// - partial unrolling loops for removing slower MOVW insns.
/// (Note probably same operation should be done for decode_3dnow) /// (Note: probably same operation should be done for decode_3dnow.s)
/// - change function name for support 3DNowEx! automatic detect /// - change function name for support 3DNowEx! automatic detect
/// ///
/// note: because K7 processors are an aggresive out-of-order three-way /// note: because K7 processors are an aggresive out-of-order three-way
/// superscalar ones instruction order is not significand for them. /// superscalar ones instruction order is not significand for them.
/// ///
/// Benchmark: measured by mplayer on Duron-700:
/// 3dNow! optimized code - 1.5% of cpu usage
/// k7 optimized code - 1.1% of cpu usage
/// Note: K6-2 users have an chance with partial loops unrolling
///
/// Modified by Nick Kurshev <nickols_k@mail.ru> /// Modified by Nick Kurshev <nickols_k@mail.ru>
/// ///
/ synth_1to1_3dnow works the same way as the c version of / synth_1to1_3dnow works the same way as the c version of