Rémy Oudompheng 357f733695 cmd/5c, cmd/5g, cmd/5l: turn MOVB, MOVH into plain moves, optimize short arithmetic. ... Pseudo-instructions MOVBS and MOVHS are used to clarify the semantics of short integers vs. registers: * 8-bit and 16-bit values in registers are assumed to always be zero-extended or sign-extended depending on their type. * MOVB is truncation or move of an already extended value between registers. * MOVBU enforces zero-extension at the destination (register). * MOVBS enforces sign-extension at the destination (register). And similarly for MOVH/MOVS/MOVHU. The linker is adapted to assemble MOVB and MOVH to an ordinary mov. Also a peephole pass in 5g that aims at eliminating redundant zero/sign extensions is improved. encoding/binary: benchmark old ns/op new ns/op delta BenchmarkReadSlice1000Int32s 220387 217185 -1.45% BenchmarkReadStruct 12839 12910 +0.55% BenchmarkReadInts 5692 5534 -2.78% BenchmarkWriteInts 6137 6016 -1.97% BenchmarkPutUvarint32 257 241 -6.23% BenchmarkPutUvarint64 812 754 -7.14% benchmark old MB/s new MB/s speedup BenchmarkReadSlice1000Int32s 18.15 18.42 1.01x BenchmarkReadStruct 5.45 5.42 0.99x BenchmarkReadInts 5.27 5.42 1.03x BenchmarkWriteInts 4.89 4.99 1.02x BenchmarkPutUvarint32 15.56 16.57 1.06x BenchmarkPutUvarint64 9.85 10.60 1.08x crypto/des: benchmark old ns/op new ns/op delta BenchmarkEncrypt 7002 5169 -26.18% BenchmarkDecrypt 7015 5195 -25.94% benchmark old MB/s new MB/s speedup BenchmarkEncrypt 1.14 1.55 1.36x BenchmarkDecrypt 1.14 1.54 1.35x strconv: benchmark old ns/op new ns/op delta BenchmarkAtof64Decimal 457 385 -15.75% BenchmarkAtof64Float 574 479 -16.55% BenchmarkAtof64FloatExp 1035 906 -12.46% BenchmarkAtof64Big 1793 1457 -18.74% BenchmarkAtof64RandomBits 2267 2066 -8.87% BenchmarkAtof64RandomFloats 1416 1194 -15.68% BenchmarkAtof32Decimal 451 379 -15.96% BenchmarkAtof32Float 547 435 -20.48% BenchmarkAtof32FloatExp 1095 986 -9.95% BenchmarkAtof32Random 1154 1006 -12.82% BenchmarkAtoi 1415 1380 -2.47% BenchmarkAtoiNeg 1414 1401 -0.92% BenchmarkAtoi64 1744 1671 -4.19% BenchmarkAtoi64Neg 1737 1662 -4.32% Fixes #1837. R=rsc, dave, bradfitz CC=golang-dev https://golang.org/cl/12424043		2013-08-09 06:43:17 +02:00
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cgen.c	cmd/5c, cmd/6c, cmd/8c: record arg size for every call	2013-07-16 16:24:43 -04:00
doc.go	cmd/godoc: use go/build to determine package and example files	2013-02-19 11:19:58 -08:00
gc.h	cmd/5c, cmd/6c, cmd/8c: record arg size for every call	2013-07-16 16:24:43 -04:00
list.c	cmd/5c, cmd/5g, cmd/5l: fix cross compilation failure on darwin	2012-06-08 13:13:02 +10:00
Makefile	build: delete make paraphernalia	2012-02-06 13:34:25 -05:00
mul.c	various: avoid %ld etc	2010-10-13 16:20:22 -04:00
peep.c	cmd/5c, cmd/5g, cmd/5l: introduce MOVBS and MOVHS instructions.	2013-08-08 23:28:53 +02:00
reg.c	cmd/5c, cmd/5g, cmd/5l: turn MOVB, MOVH into plain moves, optimize short arithmetic.	2013-08-09 06:43:17 +02:00
sgen.c	runtime: cleanup: use ArgsSizeUnknown to mark all functions	2013-07-19 11:19:18 -07:00
swt.c	cmd/cgo, cmd/ld: new cgo object file section	2013-03-01 00:27:57 -05:00
txt.c	cmd/5c, cmd/5g, cmd/5l: introduce MOVBS and MOVHS instructions.	2013-08-08 23:28:53 +02:00