)]}'
{
  "commit": "45b70db8754d28e4e54732af28714f58a3816915",
  "tree": "9f0af5ce1e4bb8b23ab8f94b53198fc3293570ca",
  "parents": [
    "85efe00cdd931241687d3ba5a330579ac595db01"
  ],
  "author": {
    "name": "Ahmed S. Taei",
    "email": "asaadaldien@users.noreply.github.com",
    "time": "Wed Nov 18 13:57:47 2020 -0800"
  },
  "committer": {
    "name": "GitHub",
    "email": "noreply@github.com",
    "time": "Wed Nov 18 13:57:47 2020 -0800"
  },
  "message": "Add a pass for FastExp conversion (#3839)\n\nConvert `llvm.intr.exp` into a sequence of ops that computes an approximation to exp(x).\r\nThis is using the fact that:\r\n```\r\nexp(x) \u003d exp(x - floor(x \\ ln(2) * ln(2)) 2^(floor(x \\ ln(2))\r\n            \u003d exp(x - k * ln(2)) * 2^k\r\n```\r\nexp(x - k * ln(2)) range is [0, ln(2)] which is approximated with 4degree polynomial.\r\nThe real number 2^k is computed with integer bitwise arithmetic.\r\n\r\nMobileBert benchmarks:\r\n\r\nBefore:\r\n```\r\n------------------------------------------------------------------------------------\r\nBenchmark                                          Time             CPU   Iterations\r\n------------------------------------------------------------------------------------\r\nBM_serving_default/process_time/real_time        907 ms          905 ms            1\r\n```\r\n\r\nAfter:\r\n```\r\n------------------------------------------------------------------------------------\r\nBenchmark                                          Time             CPU   Iterations\r\n------------------------------------------------------------------------------------\r\nBM_serving_default/process_time/real_time        819 ms          815 ms            1\r\n```",
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