Second try of initial ARM/Thumb disassembler check-in. It consists of a tablgen

backend (ARMDecoderEmitter) which emits the decoder functions for ARM and Thumb,
and the disassembler core which invokes the decoder function and builds up the
MCInst based on the decoded Opcode.

Reviewed by Chris Latter and Bob Wilson.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100233 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 184 insertions, 0 deletions

diff --git a/test/MC/Disassembler/arm-tests.txt b/test/MC/Disassembler/arm-tests.txt
new file mode 100644
index 0000000000..094a2d7372
--- /dev/null
+++ b/test/MC/Disassembler/arm-tests.txt
@@ -0,0 +1,62 @@
+# RUN: llvm-mc --disassemble %s -triple=arm-apple-darwin9 | FileCheck %s
+
+# CHECK:	b	#0
+0xfe 0xff 0xff 0xea
+
+# CHECK:	bfc	r8, #0, #16
+0x1f 0x80 0xcf 0xe7
+
+# CHECK:	bfi	r8, r0, #16, #1
+0x10 0x88 0xd0 0xe7
+
+# CHECK:	cmn	r0, #1
+0x01 0x00 0x70 0xe3
+
+# CHECK:	dmb	nshst
+0x56 0xf0 0x7f 0xf5
+
+# CHECK:	ldr	r0, [r2], #15
+0x0f 0x00 0x92 0xe4
+
+# CHECK:	lsls	r0, r2, #31
+0x82 0x0f 0xb0 0xe1
+
+# CHECK:	mcr2	p0, #0, r2, cr1, cr0, #7
+0xf0 0x20 0x01 0xfe
+
+# CHECK:	movt	r8, #65535
+0xff 0x8f 0x4f 0xe3
+
+# CHECK:	pkhbt	r8, r9, r10, lsl #4
+0x1a 0x82 0x89 0xe6
+
+# CHECK:	pop	{r0, r2, r4, r6, r8, r10}
+0x55 0x05 0xbd 0xe8
+
+# CHECK:	push	{r0, r2, r4, r6, r8, r10}
+0x55 0x05 0x2d 0xe9
+
+# CHECK:	qsax	r8, r9, r10
+0x5a 0x8f 0x29 0xe6
+
+# CHECK:	rfedb	r0!
+0x00 0x0a 0x30 0xf9
+
+# CHECK:	sbcs	r0, pc, #1
+0x01 0x00 0xdf 0xe2
+
+# CHECK:	sbfx	r0, r1, #0, #8
+0x51 0x00 0xa7 0xe7
+
+# CHECK:	ssat	r8, #1, r10, lsl #8
+0x1a 0x84 0xa0 0xe6
+
+# CHECK:	stmdb	r10!, {r4, r5, r6, r7, lr}
+0xf0 0x40 0x2a 0xe9
+
+# CHECK:	teq	r0, #31
+0x1f 0x00 0x30 0xe3
+
+# CHECK:	ubfx	r0, r0, #16, #1
+0x50 0x08 0xe0 0xe7
+
diff --git a/test/MC/Disassembler/neon-tests.txt b/test/MC/Disassembler/neon-tests.txt
new file mode 100644
index 0000000000..5d37b8c641
--- /dev/null
+++ b/test/MC/Disassembler/neon-tests.txt
@@ -0,0 +1,41 @@
+# RUN: llvm-mc --disassemble %s -triple=arm-apple-darwin9 | FileCheck %s
+
+# CHECK:	vbif	q15, q7, q0
+0x50 0xe1 0x7e 0xf3
+
+# CHECK:	vcvt.f32.s32	q15, q0, #1
+0x50 0xee 0xff 0xf2
+
+# CHECK:	vdup.32	q3, d1[0]
+0x41 0x6c 0xb4 0xf3
+
+# CHECK:	vld4.8	{d0, d1, d2, d3}, [r2], r7
+0x07 0x00 0x22 0xf4
+
+# CHECK:	vld4.8	{d4, d6, d8, d10}, [r2]
+0x0f 0x41 0x22 0xf4
+
+# CHECK:	vmov	d0, d15
+0x1f 0x01 0x2f 0xf2
+
+# CHECK:	vmul.f32	d0, d0, d6
+0x16 0x0d 0x00 0xf3
+
+# CHECK:	vneg.f32	q0, q0
+0xc0 0x07 0xb9 0xf3
+
+# CHECK:	vqrdmulh.s32	d0, d0, d3[1]
+0x63 0x0d 0xa0 0xf2
+
+# CHECK:	vrshr.s32	d0, d0, #16
+0x10 0x02 0xb0 0xf2
+
+# CHECK:	vshll.i16	q3, d1, #16
+0x01 0x63 0xb6 0xf3
+
+# CHECK:	vsri.32	q15, q0, #1
+0x50 0xe4 0xff 0xf3
+
+# CHECK:	vtbx.8	d18, {d4, d5, d6}, d7
+0x47 0x2a 0xf4 0xf3
+
diff --git a/test/MC/Disassembler/thumb-tests.txt b/test/MC/Disassembler/thumb-tests.txt
new file mode 100644
index 0000000000..e7e6385818
--- /dev/null
+++ b/test/MC/Disassembler/thumb-tests.txt
@@ -0,0 +1,81 @@
+# RUN: llvm-mc --disassemble %s -triple=thumb-apple-darwin9 | FileCheck %s
+
+# CHECK:	add	r5, sp, #68
+0x11 0xad
+
+# CHECK:	adcs	r0, r0, #1
+0x50 0xf1 0x01 0x00
+
+# CHECK:	b	#34
+0x0f 0xe0
+
+# CHECK:	bfi	r2, r10, #0, #1
+0x6a 0xf3 0x00 0x02
+
+# CHECK:	cbnz	r7, #20
+0x57 0xb9
+
+# CHECK:	cmp	r3, r4
+0xa3 0x42
+
+# CHECK:	cmn.w	r0, #31
+0x10 0xf1 0x1f 0x0f
+
+# CHECK:	ldmia	r0!, {r1}
+0x02 0xc8
+
+# CHECK:	ldrd	r0, r1, [r7, #64]!
+0xf7 0xe9 0x10 0x01
+
+# CHECK:	lsls.w	r0, pc, #1
+0x5f 0xea 0x4f 0x00
+
+# CHECK:	mov	r11, r7
+0xbb 0x46
+
+# CHECK:	pkhtb	r2, r4, r6, asr #16
+0xc4 0xea 0x26 0x42
+
+# CHECK:	pop	{r2, r4, r6, r8, r10, r12}
+0xbd 0xe8 0x54 0x15
+
+# CHECK:	push	{r2, r4, r6, r8, r10, r12}
+0x2d 0xe9 0x54 0x15
+
+# CHECK:	rsbs	r0, r0, #0
+0x40 0x42
+
+# CHECK:	strd	r0, [r7, #64]
+0xc7 0xe9 0x10 0x01
+
+# CHECK:	sub	sp, #60
+0x8f 0xb0
+
+# CHECK:	subw	r0, pc, #1
+0xaf 0xf2 0x01 0x00
+
+# CHECK:	uqadd16	r3, r4, r5
+0x94 0xfa 0x55 0xf3
+
+# CHECK:	usada8	r5, r4, r3, r2
+0x74 0xfb 0x03 0x25
+
+# CHECK:	uxtab16	r1, r2, r3, ror #8
+0x32 0xfa 0x93 0xf1
+
+# IT block begin
+# CHECK:	ittte	eq
+0x03 0xbf
+
+# CHECK:	moveq	r3, #3
+0x03 0x23
+
+# CHECK:	asreq	r1, r0, #5
+0x41 0x11
+
+# CHECK:	lsleq	r1, r0, #28
+0x01 0x07
+
+# CHECK:	rsbne	r1, r2, #0
+0x51 0x42
+# IT block end