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ARMv7M vs. ARMv7E-M support.

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The DSP instructions in the Thumb2 instruction set are an optional extension
in the Cortex-M* archtitecture. When present, the implementation is considered
an "ARMv7E-M implementation," and when not, an "ARMv7-M implementation."

Add a subtarget feature hook for the v7e-m instructions and hook it up. The
cortex-m3 cpu is an example of a v7m implementation, while the cortex-m4 is
a v7e-m implementation.

rdar://9572992



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134261 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2011-07-01 21:12:19 +00:00
parent 5b1b4489cf
commit a7603982db
9 changed files with 121 additions and 53 deletions
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2
test/CodeGen/Thumb2/thumb2-smla.ll
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@@ -1,4 +1,4 @@
; RUN: llc < %s -march=thumb -mattr=+thumb2,+t2xtpk | FileCheck %s
; RUN: llc < %s -march=thumb -mattr=+thumb2,+t2xtpk,+t2dsp | FileCheck %s
define i32 @f3(i32 %a, i16 %x, i32 %y) {
; CHECK: f3