RFR: 8255368: Math.exp() gives wrong result for large values on x86 32-bit platforms [v3]

[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 updated the pull request incrementally with two additional commits since the last revision:

 - Merge branch 'JDK-8255368' of github.com:xbzhang99/bugfixes into JDK-8255368
 - Added test cases for exp at the value of 1024 and 10000

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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/305d915b..757192c3

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=894&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=894&range=01-02

  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 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