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Unified Diff: tests_lit/assembler/arm32/ldrex-strex.ll

Issue 1516863003: Add various forms of LDREX/STREX to ARM integrated assembler. (Closed) Base URL: https://chromium.googlesource.com/native_client/pnacl-subzero.git@master
Patch Set: Fix issues raised in previous patch. Created 5 years ago
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Index: tests_lit/assembler/arm32/ldrex-strex.ll
diff --git a/tests_lit/assembler/arm32/ldrex-strex.ll b/tests_lit/assembler/arm32/ldrex-strex.ll
new file mode 100644
index 0000000000000000000000000000000000000000..cc8d2e92e7e5aacf62d27d34eb765d087bcf6496
--- /dev/null
+++ b/tests_lit/assembler/arm32/ldrex-strex.ll
@@ -0,0 +1,622 @@
+; Tests assembly of ldrex and strex instructions
+
+; REQUIRES: allow_dump
+
+; Compile using standalone assembler.
+; RUN: %p2i --filetype=asm -i %s --target=arm32 --args -Om1 \
+; RUN: | FileCheck %s --check-prefix=ASM
+
+; Show bytes in assembled standalone code.
+; RUN: %p2i --filetype=asm -i %s --target=arm32 --assemble --disassemble \
+; RUN: --args -Om1 | FileCheck %s --check-prefix=DIS
+
+; Compile using integrated assembler.
+; RUN: %p2i --filetype=iasm -i %s --target=arm32 --args -Om1 \
+; RUN: | FileCheck %s --check-prefix=IASM
+
+; Show bytes in assembled integrated code.
+; RUN: %p2i --filetype=iasm -i %s --target=arm32 --assemble --disassemble \
+; RUN: --args -Om1 | FileCheck %s --check-prefix=DIS
+
+declare i8 @llvm.nacl.atomic.rmw.i8(i32, i8*, i8, i32)
+
+declare i16 @llvm.nacl.atomic.rmw.i16(i32, i16*, i16, i32)
+
+declare i32 @llvm.nacl.atomic.rmw.i32(i32, i32*, i32, i32) #0
+
+declare i64 @llvm.nacl.atomic.rmw.i64(i32, i64*, i64, i32) #0
+
+define internal i32 @testI8Form(i32 %ptr, i32 %a) {
+; ASM-LABEL:testI8Form:
+; DIS-LABEL:00000000 <testI8Form>:
+; IASM-LABEL:testI8Form:
+
+entry:
+; ASM-NEXT:.LtestI8Form$entry:
+; IASM-NEXT:.LtestI8Form$entry:
+
+; ASM-NEXT: sub sp, sp, #28
+; DIS-NEXT: 0: e24dd01c
+; IASM-NEXT: .byte 0x1c
+; IASM-NEXT: .byte 0xd0
+; IASM-NEXT: .byte 0x4d
+; IASM-NEXT: .byte 0xe2
+
+; ASM-NEXT: str r0, [sp, #24]
+; ASM-NEXT: # [sp, #24] = def.pseudo
+; DIS-NEXT: 4: e58d0018
+; IASM-NEXT: .byte 0x18
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r1, [sp, #20]
+; ASM-NEXT: # [sp, #20] = def.pseudo
+; DIS-NEXT: 8: e58d1014
+; IASM-NEXT: .byte 0x14
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+ %ptr.asptr = inttoptr i32 %ptr to i8*
+ %a.arg_trunc = trunc i32 %a to i8
+
+; ASM-NEXT: ldr r0, [sp, #20]
+; DIS-NEXT: c: e59d0014
+; IASM-NEXT: .byte 0x14
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: strb r0, [sp, #16]
+; DIS-NEXT: 10: e5cd0010
+; ASM-NEXT: # [sp, #16] = def.pseudo
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0xcd
+; IASM-NEXT: .byte 0xe5
+
+ %v = call i8 @llvm.nacl.atomic.rmw.i8(i32 1, i8* %ptr.asptr,
+ i8 %a.arg_trunc, i32 6)
+
+; ASM-NEXT: ldrb r0, [sp, #16]
+; DIS-NEXT: 14: e5dd0010
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0xdd
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: strb r0, [sp, #4]
+; ASM-NEXT: # [sp, #4] = def.pseudo
+; DIS-NEXT: 18: e5cd0004
+; IASM-NEXT: .byte 0x4
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0xcd
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: ldr r0, [sp, #24]
+; DIS-NEXT: 1c: e59d0018
+; IASM-NEXT: .byte 0x18
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r0, [sp]
+; ASM-NEXT: # [sp] = def.pseudo
+; DIS-NEXT: 20: e58d0000
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: dmb sy
+; DIS-NEXT: 24: f57ff05f
+; IASM-NEXT: .byte 0x5f
+; IASM-NEXT: .byte 0xf0
+; IASM-NEXT: .byte 0x7f
+; IASM-NEXT: .byte 0xf5
+
+; ASM-NEXT:.LtestI8Form$local$__0:
+; IASM-NEXT:.LtestI8Form$local$__0:
+
+; ASM-NEXT: ldr r0, [sp]
+; DIS-NEXT: 28: e59d0000
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: ldrb r1, [sp, #4]
+; DIS-NEXT: 2c: e5dd1004
+; IASM-NEXT: .byte 0x4
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0xdd
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: uxtb r1, r1
+; DIS-NEXT: 30: e6ef1071
+; IASM-NEXT: .byte 0x71
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0xef
+; IASM-NEXT: .byte 0xe6
+
+; ***** Example of ldrexb *****
+; ASM-NEXT: ldrexb r2, [r0]
+; DIS-NEXT: 34: e1d02f9f
+; IASM-NEXT: .byte 0x9f
+; IASM-NEXT: .byte 0x2f
+; IASM-NEXT: .byte 0xd0
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: add r1, r2, r1
+; ASM-NEXT: # r3 = def.pseudo
+; DIS-NEXT: 38: e0821001
+; IASM-NEXT: .byte 0x1
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x82
+; IASM-NEXT: .byte 0xe0
+
+; ***** Example of strexb *****
+; ASM-NEXT: strexb r3, r1, [r0]
+; DIS-NEXT: 3c: e1c03f91
+; IASM-NEXT: .byte 0x91
+; IASM-NEXT: .byte 0x3f
+; IASM-NEXT: .byte 0xc0
+; IASM-NEXT: .byte 0xe1
+
+ %retval = zext i8 %v to i32
+ ret i32 %retval
+}
+
+define internal i32 @testI16Form(i32 %ptr, i32 %a) {
+; ASM-LABEL:testI16Form:
+; DIS-LABEL:00000070 <testI16Form>:
+; IASM-LABEL:testI16Form:
+
+entry:
+; ASM-NEXT:.LtestI16Form$entry:
+; IASM-NEXT:.LtestI16Form$entry:
+
+; ASM-NEXT: sub sp, sp, #28
+; DIS-NEXT: 70: e24dd01c
+; IASM-NEXT: .byte 0x1c
+; IASM-NEXT: .byte 0xd0
+; IASM-NEXT: .byte 0x4d
+; IASM-NEXT: .byte 0xe2
+
+; ASM-NEXT: str r0, [sp, #24]
+; ASM-NEXT: # [sp, #24] = def.pseudo
+; DIS-NEXT: 74: e58d0018
+; IASM-NEXT: .byte 0x18
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r1, [sp, #20]
+; ASM-NEXT: # [sp, #20] = def.pseudo
+; DIS-NEXT: 78: e58d1014
+; IASM-NEXT: .byte 0x14
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+ %ptr.asptr = inttoptr i32 %ptr to i16*
+ %a.arg_trunc = trunc i32 %a to i16
+
+; ASM-NEXT: ldr r0, [sp, #20]
+; DIS-NEXT: 7c: e59d0014
+; IASM-NEXT: .byte 0x14
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: strh r0, [sp, #16]
+; ASM-NEXT: # [sp, #16] = def.pseudo
+; DIS-NEXT: 80: e1cd01b0
+; IASM-NEXT: .byte 0xb0
+; IASM-NEXT: .byte 0x1
+; IASM-NEXT: .byte 0xcd
+; IASM-NEXT: .byte 0xe1
+
+ %v = call i16 @llvm.nacl.atomic.rmw.i16(i32 1, i16* %ptr.asptr,
+ i16 %a.arg_trunc, i32 6)
+
+; ASM-NEXT: ldrh r0, [sp, #16]
+; DIS-NEXT: 84: e1dd01b0
+; IASM-NEXT: .byte 0xb0
+; IASM-NEXT: .byte 0x1
+; IASM-NEXT: .byte 0xdd
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: strh r0, [sp, #4]
+; ASM-NEXT: # [sp, #4] = def.pseudo
+; DIS-NEXT: 88: e1cd00b4
+; IASM-NEXT: .byte 0xb4
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0xcd
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: ldr r0, [sp, #24]
+; DIS-NEXT: 8c: e59d0018
+; IASM-NEXT: .byte 0x18
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r0, [sp]
+; ASM-NEXT: # [sp] = def.pseudo
+; DIS-NEXT: 90: e58d0000
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: dmb sy
+; DIS-NEXT: 94: f57ff05f
+; IASM-NEXT: .byte 0x5f
+; IASM-NEXT: .byte 0xf0
+; IASM-NEXT: .byte 0x7f
+; IASM-NEXT: .byte 0xf5
+
+; ASM-NEXT:.LtestI16Form$local$__0:
+; IASM-NEXT:.LtestI16Form$local$__0:
+
+; ASM-NEXT: ldr r0, [sp]
+; DIS-NEXT: 98: e59d0000
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: ldrh r1, [sp, #4]
+; DIS-NEXT: 9c: e1dd10b4
+; IASM-NEXT: .byte 0xb4
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0xdd
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: uxth r1, r1
+; DIS-NEXT: a0: e6ff1071
+; IASM-NEXT: .byte 0x71
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0xff
+; IASM-NEXT: .byte 0xe6
+
+; ***** Example of ldrexh *****
+; ASM-NEXT: ldrexh r2, [r0]
+; DIS-NEXT: a4: e1f02f9f
+; IASM-NEXT: .byte 0x9f
+; IASM-NEXT: .byte 0x2f
+; IASM-NEXT: .byte 0xf0
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: add r1, r2, r1
+; ASM-NEXT: # r3 = def.pseudo
+; DIS-NEXT: a8: e0821001
+; IASM-NEXT: .byte 0x1
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x82
+; IASM-NEXT: .byte 0xe0
+
+; ***** Example of strexh *****
+; ASM-NEXT: strexh r3, r1, [r0]
+; DIS-NEXT: ac: e1e03f91
+; IASM-NEXT: .byte 0x91
+; IASM-NEXT: .byte 0x3f
+; IASM-NEXT: .byte 0xe0
+; IASM-NEXT: .byte 0xe1
+
+ %retval = zext i16 %v to i32
+ ret i32 %retval
+}
+
+define internal i32 @testI32Form(i32 %ptr, i32 %a) {
+; ASM-LABEL:testI32Form:
+; DIS-LABEL:000000e0 <testI32Form>:
+; IASM-LABEL:testI32Form:
+
+entry:
+; ASM-NEXT:.LtestI32Form$entry:
+; IASM-NEXT:.LtestI32Form$entry:
+
+; ASM-NEXT: sub sp, sp, #20
+; DIS-NEXT: e0: e24dd014
+; IASM-NEXT: .byte 0x14
+; IASM-NEXT: .byte 0xd0
+; IASM-NEXT: .byte 0x4d
+; IASM-NEXT: .byte 0xe2
+
+; ASM-NEXT: str r0, [sp, #16]
+; ASM-NEXT: # [sp, #16] = def.pseudo
+; DIS-NEXT: e4: e58d0010
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r1, [sp, #12]
+; ASM-NEXT: # [sp, #12] = def.pseudo
+; DIS-NEXT: e8: e58d100c
+; IASM-NEXT: .byte 0xc
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+ %ptr.asptr = inttoptr i32 %ptr to i32*
+ %v = call i32 @llvm.nacl.atomic.rmw.i32(i32 1, i32* %ptr.asptr,
+ i32 %a, i32 6)
+
+; ASM-NEXT: ldr r0, [sp, #12]
+; DIS-NEXT: ec: e59d000c
+; IASM-NEXT: .byte 0xc
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r0, [sp, #4]
+; ASM-NEXT: # [sp, #4] = def.pseudo
+; DIS-NEXT: f0: e58d0004
+; IASM-NEXT: .byte 0x4
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: ldr r0, [sp, #16]
+; DIS-NEXT: f4: e59d0010
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r0, [sp]
+; ASM-NEXT: # [sp] = def.pseudo
+; DIS-NEXT: f8: e58d0000
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: dmb sy
+; DIS-NEXT: fc: f57ff05f
+; IASM-NEXT: .byte 0x5f
+; IASM-NEXT: .byte 0xf0
+; IASM-NEXT: .byte 0x7f
+; IASM-NEXT: .byte 0xf5
+
+; ASM-NEXT:.LtestI32Form$local$__0:
+; IASM-NEXT:.LtestI32Form$local$__0:
+
+; ASM-NEXT: ldr r0, [sp]
+; DIS-NEXT: 100: e59d0000
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: ldr r1, [sp, #4]
+; DIS-NEXT: 104: e59d1004
+; IASM-NEXT: .byte 0x4
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ***** Example of ldrex *****
+; ASM-NEXT: ldrex r2, [r0]
+; DIS-NEXT: 108: e1902f9f
+; IASM-NEXT: .byte 0x9f
+; IASM-NEXT: .byte 0x2f
+; IASM-NEXT: .byte 0x90
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: add r1, r2, r1
+; ASM-NEXT: # r3 = def.pseudo
+; DIS-NEXT: 10c: e0821001
+; IASM-NEXT: .byte 0x1
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x82
+; IASM-NEXT: .byte 0xe0
+
+; ***** Example of strex *****
+; ASM-NEXT: strex r3, r1, [r0]
+; DIS-NEXT: 110: e1803f91
+; IASM-NEXT: .byte 0x91
+; IASM-NEXT: .byte 0x3f
+; IASM-NEXT: .byte 0x80
+; IASM-NEXT: .byte 0xe1
+
+ ret i32 %v
+}
+
+define internal i64 @testI64Form(i32 %ptr, i64 %a) {
+; ASM-LABEL:testI64Form:
+; DIS-LABEL:00000130 <testI64Form>:
+; IASM-LABEL:testI64Form:
+
+entry:
+; ASM-NEXT:.LtestI64Form$entry:
+; IASM-NEXT:.LtestI64Form$entry:
+
+; ASM-NEXT: push {r4, r5}
+; DIS-NEXT: 130: e92d0030
+; IASM-NEXT: .byte 0x30
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x2d
+; IASM-NEXT: .byte 0xe9
+
+; ASM-NEXT: sub sp, sp, #32
+; DIS-NEXT: 134: e24dd020
+; IASM-NEXT: .byte 0x20
+; IASM-NEXT: .byte 0xd0
+; IASM-NEXT: .byte 0x4d
+; IASM-NEXT: .byte 0xe2
+
+; ASM-NEXT: str r0, [sp, #28]
+; ASM-NEXT: # [sp, #28] = def.pseudo
+; DIS-NEXT: 138: e58d001c
+; IASM-NEXT: .byte 0x1c
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: mov r0, r2
+; DIS-NEXT: 13c: e1a00002
+; IASM-NEXT: .byte 0x2
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0xa0
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: str r0, [sp, #24]
+; ASM-NEXT: # [sp, #24] = def.pseudo
+; DIS-NEXT: 140: e58d0018
+; IASM-NEXT: .byte 0x18
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: mov r0, r3
+; DIS-NEXT: 144: e1a00003
+; IASM-NEXT: .byte 0x3
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0xa0
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: str r0, [sp, #20]
+; ASM-NEXT: # [sp, #20] = def.pseudo
+; ASM-NEXT: # [sp] = def.pseudo
+; DIS-NEXT: 148: e58d0014
+; IASM-NEXT: .byte 0x14
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+ %ptr.asptr = inttoptr i32 %ptr to i64*
+ %v = call i64 @llvm.nacl.atomic.rmw.i64(i32 1, i64* %ptr.asptr,
+ i64 %a, i32 6)
+
+; ASM-NEXT: ldr r0, [sp, #24]
+; DIS-NEXT: 14c: e59d0018
+; IASM-NEXT: .byte 0x18
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r0, [sp, #8]
+; ASM-NEXT: # [sp, #8] = def.pseudo
+; DIS-NEXT: 150: e58d0008
+; IASM-NEXT: .byte 0x8
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: ldr r0, [sp, #20]
+; DIS-NEXT: 154: e59d0014
+; IASM-NEXT: .byte 0x14
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r0, [sp, #4]
+; ASM-NEXT: # [sp, #4] = def.pseudo
+; DIS-NEXT: 158: e58d0004
+; IASM-NEXT: .byte 0x4
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: ldr r0, [sp, #28]
+; DIS-NEXT: 15c: e59d001c
+; IASM-NEXT: .byte 0x1c
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: str r0, [sp]
+; ASM-NEXT: # [sp] = def.pseudo
+; DIS-NEXT: 160: e58d0000
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x8d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: dmb sy
+; DIS-NEXT: 164: f57ff05f
+; IASM-NEXT: .byte 0x5f
+; IASM-NEXT: .byte 0xf0
+; IASM-NEXT: .byte 0x7f
+; IASM-NEXT: .byte 0xf5
+
+; ASM-NEXT:.LtestI64Form$local$__0:
+; IASM-NEXT:.LtestI64Form$local$__0:
+
+; ASM-NEXT: ldr r0, [sp]
+; ASM-NEXT: # r2, r3 = def.pseudo [sp]
+; DIS-NEXT: 168: e59d0000
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x0
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: ldr r1, [sp, #8]
+; DIS-NEXT: 16c: e59d1008
+; IASM-NEXT: .byte 0x8
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: mov r2, r1
+; DIS-NEXT: 170: e1a02001
+; IASM-NEXT: .byte 0x1
+; IASM-NEXT: .byte 0x20
+; IASM-NEXT: .byte 0xa0
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: ldr r1, [sp, #4]
+; DIS-NEXT: 174: e59d1004
+; IASM-NEXT: .byte 0x4
+; IASM-NEXT: .byte 0x10
+; IASM-NEXT: .byte 0x9d
+; IASM-NEXT: .byte 0xe5
+
+; ASM-NEXT: mov r3, r1
+; DIS-NEXT: 178: e1a03001
+; IASM-NEXT: .byte 0x1
+; IASM-NEXT: .byte 0x30
+; IASM-NEXT: .byte 0xa0
+; IASM-NEXT: .byte 0xe1
+
+; ***** Example of ldrexd *****
+; ASM-NEXT: ldrexd r4, r5, [r0]
+; ASM-NEXT: # r4 = def.pseudo r4, r5
+; ASM-NEXT: # r5 = def.pseudo r4, r5
+; ASM-NEXT: # r2, r3 = def.pseudo r2, r3
+; DIS-NEXT: 17c: e1b04f9f
+; IASM-NEXT: .byte 0x9f
+; IASM-NEXT: .byte 0x4f
+; IASM-NEXT: .byte 0xb0
+; IASM-NEXT: .byte 0xe1
+
+; ASM-NEXT: adds r2, r4, r2
+; DIS-NEXT: 180: e0942002
+; IASM-NEXT: .byte 0x2
+; IASM-NEXT: .byte 0x20
+; IASM-NEXT: .byte 0x94
+; IASM-NEXT: .byte 0xe0
+
+; ASM-NEXT: adc r3, r5, r3
+; ASM-NEXT: # r1 = def.pseudo
+; DIS-NEXT: 184: e0a53003
+; IASM-NEXT: .byte 0x3
+; IASM-NEXT: .byte 0x30
+; IASM-NEXT: .byte 0xa5
+; IASM-NEXT: .byte 0xe0
+
+; ***** Example of strexd *****
+; ASM-NEXT: strexd r1, r2, r3, [r0]
+; DIS-NEXT: 188: e1a01f92
+; IASM-NEXT: .byte 0x92
+; IASM-NEXT: .byte 0x1f
+; IASM-NEXT: .byte 0xa0
+; IASM-NEXT: .byte 0xe1
+
+ ret i64 %v
+}
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