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thumb: Remove a brittle, ugly and unused arm->thumb conversion

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The relevant code that this conversion handled was removed in
c26a9ecaa2.

Change-Id: Iee40f95134e609c291c7c4e06bc50dcb895bc5e3
This commit is contained in:
Martin Storsjo 2018-03-23 13:06:41 +02:00
parent c13aaf7a3e
commit 3abdb1ca65
1 changed files with 0 additions and 7 deletions
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7
build/make/thumb.pm
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@ -54,13 +54,6 @@ sub FixThumbInstructions($$)
# "addne r0, r0, r2".
s/^(\s*)((ldr|str)(ne)?[bhd]?)(\s+)(\w+),(\s*\w+,)?\s*\[(\w+)\],\s*(\w+)/$1$2$5$6,$7 [$8]\n$1add$4$5$8, $8, $9/g;
# Convert a conditional addition to the pc register into a series of
# instructions. This converts "addlt pc, pc, r3, lsl #2" into
# "itttt lt", "movlt.n r12, pc", "addlt.w r12, #12",
# "addlt.w r12, r12, r3, lsl #2", "movlt.n pc, r12".
# This assumes that r12 is free at this point.
s/^(\s*)addlt(\s+)pc,\s*pc,\s*(\w+),\s*lsl\s*#(\d+)/$1itttt$2lt\n$1movlt.n$2r12, pc\n$1addlt.w$2r12, #12\n$1addlt.w$2r12, r12, $3, lsl #($4-$branch_shift_offset)\n$1movlt.n$2pc, r12/g;
# Convert "mov pc, lr" into "bx lr", since the former only works
# for switching from arm to thumb (and only in armv7), but not
# from thumb to arm.