RFR: 8255368: Math.exp() gives wrong result for large values on x86 32-bit platforms [v5]

[Xubo Zhang]

> Math.exp(10000) produces 0 instead of positive infinity on x86 32-bit platform. The reason was for some jmp instructions, it used jge instead of jae. Also changed movdqu to movsd as it was supposed to load a 64-bit number

Xubo Zhang has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  Fixed the bug in 32-bit build, exp generates 0 when the exponent is too large

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/894/files
  - new: https://git.openjdk.java.net/jdk/pull/894/files/fc1dff49..b23c8cba

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=894&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=894&range=03-04

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/894.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/894/head:pull/894

PR: https://git.openjdk.java.net/jdk/pull/894