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path: root/src/pkg/runtime/float.c
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2014-09-08build: move package sources from src/pkg to srcRuss Cox
Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg.
2012-08-07runtime: inline several float64 routines to speed up complex128 divisionShenghou Ma
Depends on CL 6197045. Result obtained on Core i7 620M, Darwin/amd64: benchmark old ns/op new ns/op delta BenchmarkComplex128DivNormal 57 28 -50.78% BenchmarkComplex128DivNisNaN 49 15 -68.90% BenchmarkComplex128DivDisNaN 49 15 -67.88% BenchmarkComplex128DivNisInf 40 12 -68.50% BenchmarkComplex128DivDisInf 33 13 -61.06% Result obtained on Core i7 620M, Darwin/386: benchmark old ns/op new ns/op delta BenchmarkComplex128DivNormal 89 50 -44.05% BenchmarkComplex128DivNisNaN 307 802 +161.24% BenchmarkComplex128DivDisNaN 309 788 +155.02% BenchmarkComplex128DivNisInf 278 237 -14.75% BenchmarkComplex128DivDisInf 46 22 -52.46% Result obtained on 700MHz OMAP4460, Linux/ARM: benchmark old ns/op new ns/op delta BenchmarkComplex128DivNormal 1557 465 -70.13% BenchmarkComplex128DivNisNaN 1443 220 -84.75% BenchmarkComplex128DivDisNaN 1481 218 -85.28% BenchmarkComplex128DivNisInf 952 216 -77.31% BenchmarkComplex128DivDisInf 861 231 -73.17% The 386 version has a performance regression, but as we have decided to use SSE2 instead of x87 FPU for 386 too (issue 3912), I won't address this issue. R=dsymonds, mchaten, iant, dave, mtj, rsc, r CC=golang-dev https://golang.org/cl/6024045
2012-08-07math, runtime: use a NaN that matches gcc'sShenghou Ma
our old choice is not working properly at least on VFPv2 in ARM1136JF-S (it's not preserved across float64->float32 conversions). Fixes #3745. R=dave, rsc CC=golang-dev https://golang.org/cl/6344078
2010-11-04runtime: ,s/[a-zA-Z0-9_]+/runtimeĀ·&/g, almostRuss Cox
Prefix all external symbols in runtime by runtimeĀ·, to avoid conflicts with possible symbols of the same name in linked-in C libraries. The obvious conflicts are printf, malloc, and free, but hide everything to avoid future pain. The symbols left alone are: ** known to cgo ** _cgo_free _cgo_malloc libcgo_thread_start initcgo ncgocall ** known to linker ** _rt0_$GOARCH _rt0_$GOARCH_$GOOS text etext data end pclntab epclntab symtab esymtab ** known to C compiler ** _divv _modv _div64by32 etc (arch specific) Tested on darwin/386, darwin/amd64, linux/386, linux/amd64. Built (but not tested) for freebsd/386, freebsd/amd64, linux/arm, windows/386. R=r, PeterGo CC=golang-dev https://golang.org/cl/2899041
2009-10-15move math out of runtime.Russ Cox
a step toward enforcing package boundaries, necessary to eliminate global package name space. R=r DELTA=581 (310 added, 271 deleted, 0 changed) OCL=35805 CL=35823
2009-06-30convert string runtime to use cgo.Russ Cox
now that cgo2c can handle it, merge x.c and x_go.cgo into a single x.cgo, for x=float,malloc,sema. R=r DELTA=1950 (954 added, 996 deleted, 0 changed) OCL=30951 CL=30964
2009-06-09mv src/lib to src/pkgRob Pike
tests: all.bash passes, gobuild still works, godoc still works. R=rsc OCL=30096 CL=30102