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Thumb2 assembly parsing and encoding for LDRB(immediate).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139258 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2011-09-07 21:41:25 +00:00
parent 1aedfb47f9
commit 8bb5a861a0
2 changed files with 23 additions and 3 deletions
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10
lib/Target/ARM/ARMInstrThumb2.td
View File

@ -3702,6 +3702,10 @@ def : InstAlias<"dmb", (t2DMB 0xf)>, Requires<[IsThumb2, HasDB]>;
def : InstAlias<"dsb", (t2DSB 0xf)>, Requires<[IsThumb2, HasDB]>;
def : InstAlias<"isb", (t2ISB 0xf)>, Requires<[IsThumb2, HasDB]>;
// Alias for LDRi12 without the ".w" optional width specifier.
def : t2InstAlias<"ldr${p} $Rd, $addr",
(t2LDRi12 GPR:$Rd, t2addrmode_imm12:$addr, pred:$p)>;
// Alias for LDR, LDRB, LDRH without the ".w" optional width specifier.
def : t2InstAlias<"ldr${p} $Rt, $addr",
(t2LDRi12 GPR:$Rt, t2addrmode_imm12:$addr, pred:$p)>;
def : t2InstAlias<"ldrb${p} $Rt, $addr",
(t2LDRBi12 rGPR:$Rt, t2addrmode_imm12:$addr, pred:$p)>;
def : t2InstAlias<"ldrh${p} $Rt, $addr",
(t2LDRHi12 rGPR:$Rt, t2addrmode_imm12:$addr, pred:$p)>;

16
test/MC/ARM/basic-thumb2-instructions.s
View File

@ -539,6 +539,22 @@ _func:
@ fixup A - offset: 0, value: _foo, kind: fixup_t2_ldst_pcrel_12
@------------------------------------------------------------------------------
@ LDRB(immediate)
@------------------------------------------------------------------------------
ldrb r5, [r5, #-4]
ldrb r5, [r6, #32]
ldrb r5, [r6, #33]
ldrb r5, [r6, #257]
ldrb.w lr, [r7, #257]
@ CHECK: ldrb r5, [r5, #-4] @ encoding: [0x15,0xf8,0x04,0x5c]
@ CHECK: ldrb.w r5, [r6, #32] @ encoding: [0x96,0xf8,0x20,0x50]
@ CHECK: ldrb.w r5, [r6, #33] @ encoding: [0x96,0xf8,0x21,0x50]
@ CHECK: ldrb.w r5, [r6, #257] @ encoding: [0x96,0xf8,0x01,0x51]
@ CHECK: ldrb.w lr, [r7, #257] @ encoding: [0x97,0xf8,0x01,0xe1]
@------------------------------------------------------------------------------
@ IT
@------------------------------------------------------------------------------