mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
3e16b022be
We've been performing the wrong operation on ARM for "atomicrmw nand" for years, since "a NAND b" is "~(a & b)" rather than ARM's very tempting "a & ~b". This bled over into the generic expansion pass. So I assume no-one has ever actually tried to do an atomic nand in the real world. Oh well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212443 91177308-0d34-0410-b5e6-96231b3b80d8
336 lines
11 KiB
LLVM
336 lines
11 KiB
LLVM
; RUN: llc < %s -march=arm64 -verify-machineinstrs -mcpu=cyclone | FileCheck %s
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define i32 @val_compare_and_swap(i32* %p) {
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; CHECK-LABEL: val_compare_and_swap:
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; CHECK: orr [[NEWVAL_REG:w[0-9]+]], wzr, #0x4
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; CHECK: [[LABEL:.?LBB[0-9]+_[0-9]+]]:
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; CHECK: ldaxr [[RESULT:w[0-9]+]], [x0]
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; CHECK: cmp [[RESULT]], #7
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; CHECK: b.ne [[LABEL2:.?LBB[0-9]+_[0-9]+]]
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; CHECK: stxr [[SCRATCH_REG:w[0-9]+]], [[NEWVAL_REG]], [x0]
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; CHECK: cbnz [[SCRATCH_REG]], [[LABEL]]
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; CHECK: [[LABEL2]]:
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%pair = cmpxchg i32* %p, i32 7, i32 4 acquire acquire
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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define i64 @val_compare_and_swap_64(i64* %p) {
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; CHECK-LABEL: val_compare_and_swap_64:
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; CHECK: orr w[[NEWVAL_REG:[0-9]+]], wzr, #0x4
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; CHECK: [[LABEL:.?LBB[0-9]+_[0-9]+]]:
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; CHECK: ldxr [[RESULT:x[0-9]+]], [x0]
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; CHECK: cmp [[RESULT]], #7
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; CHECK: b.ne [[LABEL2:.?LBB[0-9]+_[0-9]+]]
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; CHECK-NOT: stxr x[[NEWVAL_REG]], x[[NEWVAL_REG]]
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; CHECK: stxr [[SCRATCH_REG:w[0-9]+]], x[[NEWVAL_REG]], [x0]
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; CHECK: cbnz [[SCRATCH_REG]], [[LABEL]]
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; CHECK: [[LABEL2]]:
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%pair = cmpxchg i64* %p, i64 7, i64 4 monotonic monotonic
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%val = extractvalue { i64, i1 } %pair, 0
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ret i64 %val
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}
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define i32 @fetch_and_nand(i32* %p) {
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; CHECK-LABEL: fetch_and_nand:
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; CHECK: [[LABEL:.?LBB[0-9]+_[0-9]+]]:
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; CHECK: ldxr w[[DEST_REG:[0-9]+]], [x0]
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; CHECK: mvn [[TMP_REG:w[0-9]+]], w[[DEST_REG]]
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; CHECK: orr [[SCRATCH2_REG:w[0-9]+]], [[TMP_REG]], #0xfffffff8
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; CHECK-NOT: stlxr [[SCRATCH2_REG]], [[SCRATCH2_REG]]
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; CHECK: stlxr [[SCRATCH_REG:w[0-9]+]], [[SCRATCH2_REG]], [x0]
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; CHECK: cbnz [[SCRATCH_REG]], [[LABEL]]
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; CHECK: mov x0, x[[DEST_REG]]
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%val = atomicrmw nand i32* %p, i32 7 release
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ret i32 %val
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}
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define i64 @fetch_and_nand_64(i64* %p) {
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; CHECK-LABEL: fetch_and_nand_64:
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; CHECK: mov x[[ADDR:[0-9]+]], x0
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; CHECK: [[LABEL:.?LBB[0-9]+_[0-9]+]]:
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; CHECK: ldaxr x[[DEST_REG:[0-9]+]], [x[[ADDR]]]
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; CHECK: mvn w[[TMP_REG:[0-9]+]], w[[DEST_REG]]
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; CHECK: orr [[SCRATCH2_REG:x[0-9]+]], x[[TMP_REG]], #0xfffffffffffffff8
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; CHECK: stlxr [[SCRATCH_REG:w[0-9]+]], [[SCRATCH2_REG]], [x[[ADDR]]]
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; CHECK: cbnz [[SCRATCH_REG]], [[LABEL]]
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%val = atomicrmw nand i64* %p, i64 7 acq_rel
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ret i64 %val
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}
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define i32 @fetch_and_or(i32* %p) {
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; CHECK-LABEL: fetch_and_or:
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; CHECK: movz [[OLDVAL_REG:w[0-9]+]], #0x5
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; CHECK: [[LABEL:.?LBB[0-9]+_[0-9]+]]:
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; CHECK: ldaxr w[[DEST_REG:[0-9]+]], [x0]
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; CHECK: orr [[SCRATCH2_REG:w[0-9]+]], w[[DEST_REG]], [[OLDVAL_REG]]
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; CHECK-NOT: stlxr [[SCRATCH2_REG]], [[SCRATCH2_REG]]
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; CHECK: stlxr [[SCRATCH_REG:w[0-9]+]], [[SCRATCH2_REG]], [x0]
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; CHECK: cbnz [[SCRATCH_REG]], [[LABEL]]
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; CHECK: mov x0, x[[DEST_REG]]
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%val = atomicrmw or i32* %p, i32 5 seq_cst
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ret i32 %val
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}
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define i64 @fetch_and_or_64(i64* %p) {
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; CHECK: fetch_and_or_64:
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; CHECK: mov x[[ADDR:[0-9]+]], x0
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; CHECK: [[LABEL:.?LBB[0-9]+_[0-9]+]]:
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; CHECK: ldxr [[DEST_REG:x[0-9]+]], [x[[ADDR]]]
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; CHECK: orr [[SCRATCH2_REG:x[0-9]+]], [[DEST_REG]], #0x7
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; CHECK: stxr [[SCRATCH_REG:w[0-9]+]], [[SCRATCH2_REG]], [x[[ADDR]]]
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; CHECK: cbnz [[SCRATCH_REG]], [[LABEL]]
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%val = atomicrmw or i64* %p, i64 7 monotonic
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ret i64 %val
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}
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define void @acquire_fence() {
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fence acquire
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ret void
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; CHECK-LABEL: acquire_fence:
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; CHECK: dmb ishld
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}
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define void @release_fence() {
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fence release
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ret void
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; CHECK-LABEL: release_fence:
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; CHECK: dmb ish{{$}}
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}
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define void @seq_cst_fence() {
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fence seq_cst
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ret void
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; CHECK-LABEL: seq_cst_fence:
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; CHECK: dmb ish{{$}}
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}
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define i32 @atomic_load(i32* %p) {
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%r = load atomic i32* %p seq_cst, align 4
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ret i32 %r
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; CHECK-LABEL: atomic_load:
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; CHECK: ldar
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}
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define i8 @atomic_load_relaxed_8(i8* %p, i32 %off32) {
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; CHECK-LABEL: atomic_load_relaxed_8:
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%ptr_unsigned = getelementptr i8* %p, i32 4095
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%val_unsigned = load atomic i8* %ptr_unsigned monotonic, align 1
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; CHECK: ldrb {{w[0-9]+}}, [x0, #4095]
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%ptr_regoff = getelementptr i8* %p, i32 %off32
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%val_regoff = load atomic i8* %ptr_regoff unordered, align 1
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%tot1 = add i8 %val_unsigned, %val_regoff
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; CHECK: ldrb {{w[0-9]+}}, [x0, w1, sxtw]
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%ptr_unscaled = getelementptr i8* %p, i32 -256
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%val_unscaled = load atomic i8* %ptr_unscaled monotonic, align 1
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%tot2 = add i8 %tot1, %val_unscaled
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; CHECK: ldurb {{w[0-9]+}}, [x0, #-256]
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%ptr_random = getelementptr i8* %p, i32 1191936 ; 0x123000 (i.e. ADD imm)
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%val_random = load atomic i8* %ptr_random unordered, align 1
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%tot3 = add i8 %tot2, %val_random
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; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
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; CHECK: ldrb {{w[0-9]+}}, [x[[ADDR]]]
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ret i8 %tot3
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}
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define i16 @atomic_load_relaxed_16(i16* %p, i32 %off32) {
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; CHECK-LABEL: atomic_load_relaxed_16:
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%ptr_unsigned = getelementptr i16* %p, i32 4095
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%val_unsigned = load atomic i16* %ptr_unsigned monotonic, align 2
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; CHECK: ldrh {{w[0-9]+}}, [x0, #8190]
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%ptr_regoff = getelementptr i16* %p, i32 %off32
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%val_regoff = load atomic i16* %ptr_regoff unordered, align 2
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%tot1 = add i16 %val_unsigned, %val_regoff
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; CHECK: ldrh {{w[0-9]+}}, [x0, w1, sxtw #1]
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%ptr_unscaled = getelementptr i16* %p, i32 -128
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%val_unscaled = load atomic i16* %ptr_unscaled monotonic, align 2
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%tot2 = add i16 %tot1, %val_unscaled
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; CHECK: ldurh {{w[0-9]+}}, [x0, #-256]
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%ptr_random = getelementptr i16* %p, i32 595968 ; 0x123000/2 (i.e. ADD imm)
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%val_random = load atomic i16* %ptr_random unordered, align 2
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%tot3 = add i16 %tot2, %val_random
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; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
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; CHECK: ldrh {{w[0-9]+}}, [x[[ADDR]]]
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ret i16 %tot3
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}
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define i32 @atomic_load_relaxed_32(i32* %p, i32 %off32) {
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; CHECK-LABEL: atomic_load_relaxed_32:
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%ptr_unsigned = getelementptr i32* %p, i32 4095
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%val_unsigned = load atomic i32* %ptr_unsigned monotonic, align 4
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; CHECK: ldr {{w[0-9]+}}, [x0, #16380]
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%ptr_regoff = getelementptr i32* %p, i32 %off32
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%val_regoff = load atomic i32* %ptr_regoff unordered, align 4
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%tot1 = add i32 %val_unsigned, %val_regoff
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; CHECK: ldr {{w[0-9]+}}, [x0, w1, sxtw #2]
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%ptr_unscaled = getelementptr i32* %p, i32 -64
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%val_unscaled = load atomic i32* %ptr_unscaled monotonic, align 4
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%tot2 = add i32 %tot1, %val_unscaled
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; CHECK: ldur {{w[0-9]+}}, [x0, #-256]
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%ptr_random = getelementptr i32* %p, i32 297984 ; 0x123000/4 (i.e. ADD imm)
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%val_random = load atomic i32* %ptr_random unordered, align 4
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%tot3 = add i32 %tot2, %val_random
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; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
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; CHECK: ldr {{w[0-9]+}}, [x[[ADDR]]]
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ret i32 %tot3
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}
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define i64 @atomic_load_relaxed_64(i64* %p, i32 %off32) {
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; CHECK-LABEL: atomic_load_relaxed_64:
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%ptr_unsigned = getelementptr i64* %p, i32 4095
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%val_unsigned = load atomic i64* %ptr_unsigned monotonic, align 8
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; CHECK: ldr {{x[0-9]+}}, [x0, #32760]
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%ptr_regoff = getelementptr i64* %p, i32 %off32
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%val_regoff = load atomic i64* %ptr_regoff unordered, align 8
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%tot1 = add i64 %val_unsigned, %val_regoff
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; CHECK: ldr {{x[0-9]+}}, [x0, w1, sxtw #3]
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%ptr_unscaled = getelementptr i64* %p, i32 -32
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%val_unscaled = load atomic i64* %ptr_unscaled monotonic, align 8
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%tot2 = add i64 %tot1, %val_unscaled
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; CHECK: ldur {{x[0-9]+}}, [x0, #-256]
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%ptr_random = getelementptr i64* %p, i32 148992 ; 0x123000/8 (i.e. ADD imm)
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%val_random = load atomic i64* %ptr_random unordered, align 8
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%tot3 = add i64 %tot2, %val_random
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; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
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; CHECK: ldr {{x[0-9]+}}, [x[[ADDR]]]
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ret i64 %tot3
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}
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define void @atomc_store(i32* %p) {
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store atomic i32 4, i32* %p seq_cst, align 4
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ret void
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; CHECK-LABEL: atomc_store:
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; CHECK: stlr
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}
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define void @atomic_store_relaxed_8(i8* %p, i32 %off32, i8 %val) {
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; CHECK-LABEL: atomic_store_relaxed_8:
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%ptr_unsigned = getelementptr i8* %p, i32 4095
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store atomic i8 %val, i8* %ptr_unsigned monotonic, align 1
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; CHECK: strb {{w[0-9]+}}, [x0, #4095]
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%ptr_regoff = getelementptr i8* %p, i32 %off32
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store atomic i8 %val, i8* %ptr_regoff unordered, align 1
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; CHECK: strb {{w[0-9]+}}, [x0, w1, sxtw]
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%ptr_unscaled = getelementptr i8* %p, i32 -256
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store atomic i8 %val, i8* %ptr_unscaled monotonic, align 1
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; CHECK: sturb {{w[0-9]+}}, [x0, #-256]
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%ptr_random = getelementptr i8* %p, i32 1191936 ; 0x123000 (i.e. ADD imm)
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store atomic i8 %val, i8* %ptr_random unordered, align 1
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; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
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; CHECK: strb {{w[0-9]+}}, [x[[ADDR]]]
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ret void
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}
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define void @atomic_store_relaxed_16(i16* %p, i32 %off32, i16 %val) {
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; CHECK-LABEL: atomic_store_relaxed_16:
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%ptr_unsigned = getelementptr i16* %p, i32 4095
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store atomic i16 %val, i16* %ptr_unsigned monotonic, align 2
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; CHECK: strh {{w[0-9]+}}, [x0, #8190]
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%ptr_regoff = getelementptr i16* %p, i32 %off32
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store atomic i16 %val, i16* %ptr_regoff unordered, align 2
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; CHECK: strh {{w[0-9]+}}, [x0, w1, sxtw #1]
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%ptr_unscaled = getelementptr i16* %p, i32 -128
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store atomic i16 %val, i16* %ptr_unscaled monotonic, align 2
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; CHECK: sturh {{w[0-9]+}}, [x0, #-256]
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%ptr_random = getelementptr i16* %p, i32 595968 ; 0x123000/2 (i.e. ADD imm)
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store atomic i16 %val, i16* %ptr_random unordered, align 2
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; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
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; CHECK: strh {{w[0-9]+}}, [x[[ADDR]]]
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ret void
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}
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define void @atomic_store_relaxed_32(i32* %p, i32 %off32, i32 %val) {
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; CHECK-LABEL: atomic_store_relaxed_32:
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%ptr_unsigned = getelementptr i32* %p, i32 4095
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store atomic i32 %val, i32* %ptr_unsigned monotonic, align 4
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; CHECK: str {{w[0-9]+}}, [x0, #16380]
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%ptr_regoff = getelementptr i32* %p, i32 %off32
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store atomic i32 %val, i32* %ptr_regoff unordered, align 4
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; CHECK: str {{w[0-9]+}}, [x0, w1, sxtw #2]
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%ptr_unscaled = getelementptr i32* %p, i32 -64
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store atomic i32 %val, i32* %ptr_unscaled monotonic, align 4
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; CHECK: stur {{w[0-9]+}}, [x0, #-256]
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%ptr_random = getelementptr i32* %p, i32 297984 ; 0x123000/4 (i.e. ADD imm)
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store atomic i32 %val, i32* %ptr_random unordered, align 4
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; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
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; CHECK: str {{w[0-9]+}}, [x[[ADDR]]]
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ret void
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}
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define void @atomic_store_relaxed_64(i64* %p, i32 %off32, i64 %val) {
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; CHECK-LABEL: atomic_store_relaxed_64:
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%ptr_unsigned = getelementptr i64* %p, i32 4095
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store atomic i64 %val, i64* %ptr_unsigned monotonic, align 8
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; CHECK: str {{x[0-9]+}}, [x0, #32760]
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%ptr_regoff = getelementptr i64* %p, i32 %off32
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store atomic i64 %val, i64* %ptr_regoff unordered, align 8
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; CHECK: str {{x[0-9]+}}, [x0, w1, sxtw #3]
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%ptr_unscaled = getelementptr i64* %p, i32 -32
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store atomic i64 %val, i64* %ptr_unscaled monotonic, align 8
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; CHECK: stur {{x[0-9]+}}, [x0, #-256]
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%ptr_random = getelementptr i64* %p, i32 148992 ; 0x123000/8 (i.e. ADD imm)
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store atomic i64 %val, i64* %ptr_random unordered, align 8
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; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
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; CHECK: str {{x[0-9]+}}, [x[[ADDR]]]
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ret void
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}
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; rdar://11531169
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; rdar://11531308
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%"class.X::Atomic" = type { %struct.x_atomic_t }
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%struct.x_atomic_t = type { i32 }
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@counter = external hidden global %"class.X::Atomic", align 4
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define i32 @next_id() nounwind optsize ssp align 2 {
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entry:
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%0 = atomicrmw add i32* getelementptr inbounds (%"class.X::Atomic"* @counter, i64 0, i32 0, i32 0), i32 1 seq_cst
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%add.i = add i32 %0, 1
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%tobool = icmp eq i32 %add.i, 0
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br i1 %tobool, label %if.else, label %return
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if.else: ; preds = %entry
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%1 = atomicrmw add i32* getelementptr inbounds (%"class.X::Atomic"* @counter, i64 0, i32 0, i32 0), i32 1 seq_cst
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%add.i2 = add i32 %1, 1
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br label %return
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return: ; preds = %if.else, %entry
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%retval.0 = phi i32 [ %add.i2, %if.else ], [ %add.i, %entry ]
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ret i32 %retval.0
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}
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