diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2009-06-29 07:51:04 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-06-29 07:51:04 +0000 |
| commit | 055b0310f862b91f33699037ce67d3ab8137c20c (patch) | |
| tree | 6924272e732298bf99146b69c12f9029a5e1adc5 /lib/Target/ARM/ARMConstantIslandPass.cpp | |
| parent | 95c1f5ba64e7ad505781235839b65a2a8f64a733 (diff) | |
Implement Thumb2 ldr.
After much back and forth, I decided to deviate from ARM design and split LDR into 4 instructions (r + imm12, r + imm8, r + r << imm12, constantpool). The advantage of this is 1) it follows the latest ARM technical manual, and 2) makes it easier to reduce the width of the instruction later. The down side is this creates more inconsistency between the two sub-targets. We should split ARM LDR instruction in a similar fashion later. I've added a README entry for this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74420 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/ARMConstantIslandPass.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMConstantIslandPass.cpp | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/lib/Target/ARM/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp index db723fe832..d37e9f2cf0 100644 --- a/lib/Target/ARM/ARMConstantIslandPass.cpp +++ b/lib/Target/ARM/ARMConstantIslandPass.cpp @@ -447,21 +447,24 @@ void ARMConstantIslands::InitialFunctionScan(MachineFunction &Fn, Bits = 8; Scale = 4; // +-(offset_8*4) break; - case ARMII::AddrModeT1: + case ARMII::AddrModeT1_1: Bits = 5; // +offset_5 break; - case ARMII::AddrModeT2: + case ARMII::AddrModeT1_2: Bits = 5; Scale = 2; // +(offset_5*2) break; - case ARMII::AddrModeT4: + case ARMII::AddrModeT1_4: Bits = 5; Scale = 4; // +(offset_5*4) break; - case ARMII::AddrModeTs: + case ARMII::AddrModeT1_s: Bits = 8; Scale = 4; // +(offset_8*4) break; + case ARMII::AddrModeT2_pc: + Bits = 12; // +-offset_12 + break; } // Remember that this is a user of a CP entry. |