Mesa (master): glsl: fix broken +=, -=, *=, /= operators

[Brian Paul]

Module: Mesa
Branch: master
Commit: 730a407ca288bdd0120b9bb436ae716bfb9415f5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=730a407ca288bdd0120b9bb436ae716bfb9415f5

Author: Brian Paul <brianp at vmware.com>
Date:   Thu Jan  8 15:32:02 2009 -0700

glsl: fix broken +=, -=, *=, /= operators

These functions need to return the final computed value.
Now expressions such as a = (b += c) work properly.
Also, no need to use __asm intrinsics in these functions.  The resulting
code is the same when using ordinary arithmetic operators and is more legible.

---

 src/mesa/shader/slang/library/slang_core.gc   |  569 ++++++++-------
 src/mesa/shader/slang/library/slang_core_gc.h |  954 ++++++++++++-------------
 2 files changed, 786 insertions(+), 737 deletions(-)

Diff:   http://cgit.freedesktop.org/mesa/mesa/diff/?id=730a407ca288bdd0120b9bb436ae716bfb9415f5