tree afad98db9f3b1b3451cb4e48d773551927d8f5f1
parent 94844f1290d7fae68ad4f9e9b9e3543639e44a15
author Karl Schimpf <kschimpf@google.com> 1446740306 -0800
committer Karl Schimpf <kschimpf@google.com> 1446740306 -0800

Fix ARM emit() methods to count instructions generated.

Previously, the code assumed that the emit() method of all ARM
instructions emitted a single instruction. This is false. Instructions
like PUSH and POP may generate multiple instructions.

This is only a problem when the hybrid ARM assembler reverts back to
using the stand-alone assembler to generate instructions the
integrated assembler can't handle.

The fix is to add infrastructure to allow ARM instructions to
communicate to the assembler, the number of instructions they
generate, so that the correct-sized filler is added to the assembly
buffer.

This fixes all cross-test failures for (pc-relative) branches, except
one.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1426513004 .