asm.js

Recently I read asm.js spec and it seems cool but is there any environment/tool to develop and test this tool or not? Is that still on spec phase only? You can try it by using emscripten with ASM_JS=1 and running it in a firefox build from a side branch. Links and more instructions are in these slides about asm.js, http://kripken.github.com/mloc_emscripten_talk/#/ Use the '-s' command line option of the compiler, like thus: ./emcc -O1 -s ASM_JS=1 tests/hello_world.c 来源： https://stackoverflow.com/questions/14953351/how-to-test-and-develop-with-asm-js

I am trying to understand how exactly ASM works and when it kicks in. I took a small function from the asm.js website. I wrap it using the module pattern: once for asm, once with the same syntax but without the "use asm" annotation, and once like vanilla-javascript. var add_asm = (function MyAOTMod(stdlib, foreign, heap) { "use asm"; var sqrt = stdlib.Math.sqrt; function square(x) { x = +x; return +(x * x); } return function(x, y) { x = +x; // x has type double y = +y; // y has type double return +sqrt(square(x) + square(y)); }; }(window)); var add_reg_asmstyle = (function MyAsmLikeRegularMod(