[ARM] Classification Improvements to ARM Sched-Models. NFCI.

[javed.absar]

Summary

This is a series of patches to enable adding of machine sched models for ARM processors easier and compact. They define new sched-readwrites for groups of ARM instructions. This has been missing so far, and as a consequence, machine scheduler models for individual sub-targets have tended to be larger than they needed to be. These patches should help write schedulers better and faster in the future for ARM sub-targets. The current patch focuses on floating-point instructions.

[javed.absar]

Hi Renato/James:
Gentle reminder on this review.
Thanks.

[rengolin]

Hi Javed,

There's a lot of repetition in this patch. Can't you group the similar latencies together?

Cheers,
Renato

[javed.absar]

Hi Renato:

Thanks. OK, I will collapse the schedwrites into one wherever sub-targets, which currently have sched-model in place, do not differentiate.

I tried not to club too many of the sched-defs into one bucket because then sub-targets wouldn't be able to specify different latencies/resources if there was indeed a difference in the pipeline behavior for different instruction classes (e.g. between MUL32 and MUL64).
Best Regards, Javed.

[rengolin]

In D28194#637818, @javed.absar wrote:

I tried not to club too many of the sched-defs into one bucket because then sub-targets wouldn't be able to specify different latencies/resources if there was indeed a difference in the pipeline behavior for different instruction classes (e.g. between MUL32 and MUL64).

I see where you're coming from, but I'd rather have that differentiation done by the sub-architectures when they need, than just explode the combinations now, and having to apply larger patches every time one sub-arch needs one cost changed. :)

--renato

[javed.absar]

Hi Renato:

Based on your feedback, I have removed sub-categories of of FPCVT and FPMOV. This removes the duplication you mentioned about for the sub-target. Please have a look and let me know if this is ok.
Thanks
Javed

[rengolin]

lib/Target/ARM/ARMScheduleSwift.td

307

useless whitespace change

610

don't comment out changes. If it's irrelevant, delete. If not, uncomment.

[javed.absar]

Hi Renato:
Thanks. I have removed the commented lines and unnecessary white-space, as you recommended.
Best Regards
Javed

[rovka]

Hi Javed,

The latest diff doesn't look right, could you re-upload it please? Also, it would be great if you could include more context.

Thanks,
Diana

[javed.absar]

Hi Diana:
Please find re-uploaded and with more context. Something went wrong with previous uploading. Apologies for that.

Thanks and Best Regards
Javed

[javed.absar]

Hi Diana:
Gentle reminder. Please let me know if you are ok with this patch.
best regards

[rovka]

Hi Javed,

Sorry about the delay, I was out of office for a few days. Comments below.

Cheers,
Diana

lib/Target/ARM/ARMInstrVFP.td

402

Why are half precision division and multiplication modeled the same as single precision, but half precision add/sub/sqrt aren't?

lib/Target/ARM/ARMSchedule.td

58

Typo: integer

lib/Target/ARM/ARMScheduleA9.td

1948

Why isn't this just a SchedAlias for A9WriteFDivS?

2554

Missed a spot.

[javed.absar]

Hi Diana:
I have fixed the issues you correctly pointed out. Thanks for that.
Best Regards
Javed

[javed.absar]

Removing the commented obsolete def. Missed it earlier.

[rovka]

LGTM, thanks.

lib/Target/ARM/ARMInstrVFP.td

 //===----------------------------------------------------------------------===//
 // FP Binary Operations.
 //
 
 let TwoOperandAliasConstraint = "$Dn = $Dd" in
 def VADDD  : ADbI<0b11100, 0b11, 0, 0,
                   (outs DPR:$Dd), (ins DPR:$Dn, DPR:$Dm),
                   IIC_fpALU64, "vadd", ".f64\t$Dd, $Dn, $Dm",
-                  [(set DPR:$Dd, (fadd DPR:$Dn, (f64 DPR:$Dm)))]>;
+                  [(set DPR:$Dd, (fadd DPR:$Dn, (f64 DPR:$Dm)))]>,
+             Sched<[WriteFPALU64]>;
 
 let TwoOperandAliasConstraint = "$Sn = $Sd" in
 def VADDS  : ASbIn<0b11100, 0b11, 0, 0,
                    (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                    IIC_fpALU32, "vadd", ".f32\t$Sd, $Sn, $Sm",
-                   [(set SPR:$Sd, (fadd SPR:$Sn, SPR:$Sm))]> {
+                   [(set SPR:$Sd, (fadd SPR:$Sn, SPR:$Sm))]>,
+             Sched<[WriteFPALU32]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 let TwoOperandAliasConstraint = "$Sn = $Sd" in
 def VADDH  : AHbI<0b11100, 0b11, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                   IIC_fpALU16, "vadd", ".f16\t$Sd, $Sn, $Sm",
                   []>;
 
 let TwoOperandAliasConstraint = "$Dn = $Dd" in
 def VSUBD  : ADbI<0b11100, 0b11, 1, 0,
                   (outs DPR:$Dd), (ins DPR:$Dn, DPR:$Dm),
                   IIC_fpALU64, "vsub", ".f64\t$Dd, $Dn, $Dm",
-                  [(set DPR:$Dd, (fsub DPR:$Dn, (f64 DPR:$Dm)))]>;
+                  [(set DPR:$Dd, (fsub DPR:$Dn, (f64 DPR:$Dm)))]>,
+             Sched<[WriteFPALU64]>;
 
 let TwoOperandAliasConstraint = "$Sn = $Sd" in
 def VSUBS  : ASbIn<0b11100, 0b11, 1, 0,
                    (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                    IIC_fpALU32, "vsub", ".f32\t$Sd, $Sn, $Sm",
-                   [(set SPR:$Sd, (fsub SPR:$Sn, SPR:$Sm))]> {
+                   [(set SPR:$Sd, (fsub SPR:$Sn, SPR:$Sm))]>,
+             Sched<[WriteFPALU32]>{
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 let TwoOperandAliasConstraint = "$Sn = $Sd" in
 def VSUBH  : AHbI<0b11100, 0b11, 1, 0,
                   (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                   IIC_fpALU16, "vsub", ".f16\t$Sd, $Sn, $Sm",
                   []>;
 
 let TwoOperandAliasConstraint = "$Dn = $Dd" in
 def VDIVD  : ADbI<0b11101, 0b00, 0, 0,
                   (outs DPR:$Dd), (ins DPR:$Dn, DPR:$Dm),
                   IIC_fpDIV64, "vdiv", ".f64\t$Dd, $Dn, $Dm",
-                  [(set DPR:$Dd, (fdiv DPR:$Dn, (f64 DPR:$Dm)))]>;
+                  [(set DPR:$Dd, (fdiv DPR:$Dn, (f64 DPR:$Dm)))]>,
+             Sched<[WriteFPDIV64]>;
 
 let TwoOperandAliasConstraint = "$Sn = $Sd" in
 def VDIVS  : ASbI<0b11101, 0b00, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                   IIC_fpDIV32, "vdiv", ".f32\t$Sd, $Sn, $Sm",
-                  [(set SPR:$Sd, (fdiv SPR:$Sn, SPR:$Sm))]>;
+                  [(set SPR:$Sd, (fdiv SPR:$Sn, SPR:$Sm))]>,
+             Sched<[WriteFPDIV32]>;
 
 let TwoOperandAliasConstraint = "$Sn = $Sd" in
 def VDIVH  : AHbI<0b11101, 0b00, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                   IIC_fpDIV16, "vdiv", ".f16\t$Sd, $Sn, $Sm",
-                  []>;
+                  []>,
+             Sched<[WriteFPDIV32]>;
 
 let TwoOperandAliasConstraint = "$Dn = $Dd" in
 def VMULD  : ADbI<0b11100, 0b10, 0, 0,
                   (outs DPR:$Dd), (ins DPR:$Dn, DPR:$Dm),
                   IIC_fpMUL64, "vmul", ".f64\t$Dd, $Dn, $Dm",
-                  [(set DPR:$Dd, (fmul DPR:$Dn, (f64 DPR:$Dm)))]>;
+                  [(set DPR:$Dd, (fmul DPR:$Dn, (f64 DPR:$Dm)))]>,
+             Sched<[WriteFPMUL64, ReadFPMUL, ReadFPMUL]>;
 
 let TwoOperandAliasConstraint = "$Sn = $Sd" in
 def VMULS  : ASbIn<0b11100, 0b10, 0, 0,
                    (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                    IIC_fpMUL32, "vmul", ".f32\t$Sd, $Sn, $Sm",
-                   [(set SPR:$Sd, (fmul SPR:$Sn, SPR:$Sm))]> {
+                   [(set SPR:$Sd, (fmul SPR:$Sn, SPR:$Sm))]>,
+            Sched<[WriteFPMUL32, ReadFPMUL, ReadFPMUL]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 let TwoOperandAliasConstraint = "$Sn = $Sd" in
 def VMULH  : AHbI<0b11100, 0b10, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                   IIC_fpMUL16, "vmul", ".f16\t$Sd, $Sn, $Sm",
-                  []>;
+                  []>,
+             Sched<[WriteFPMUL32, ReadFPMUL, ReadFPMUL]>;
 
 def VNMULD : ADbI<0b11100, 0b10, 1, 0,
                   (outs DPR:$Dd), (ins DPR:$Dn, DPR:$Dm),
                   IIC_fpMUL64, "vnmul", ".f64\t$Dd, $Dn, $Dm",
-                  [(set DPR:$Dd, (fneg (fmul DPR:$Dn, (f64 DPR:$Dm))))]>;
+                  [(set DPR:$Dd, (fneg (fmul DPR:$Dn, (f64 DPR:$Dm))))]>,
+             Sched<[WriteFPMUL64, ReadFPMUL, ReadFPMUL]>;
 
 def VNMULS : ASbI<0b11100, 0b10, 1, 0,
                   (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                   IIC_fpMUL32, "vnmul", ".f32\t$Sd, $Sn, $Sm",
-                  [(set SPR:$Sd, (fneg (fmul SPR:$Sn, SPR:$Sm)))]> {
+                  [(set SPR:$Sd, (fneg (fmul SPR:$Sn, SPR:$Sm)))]>,
+            Sched<[WriteFPMUL32, ReadFPMUL, ReadFPMUL]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VNMULH : AHbI<0b11100, 0b10, 1, 0,
                   (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                   IIC_fpMUL16, "vnmul", ".f16\t$Sd, $Sn, $Sm",
-                  []>;
+                  []>,
+             Sched<[WriteFPMUL32, ReadFPMUL, ReadFPMUL]>;
 
 multiclass vsel_inst<string op, bits<2> opc, int CC> {
   let DecoderNamespace = "VFPV8", PostEncoderMethod = "",
       Uses = [CPSR], AddedComplexity = 4 in {
     def H : AHbInp<0b11100, opc, 0,
                    (outs SPR:$Sd), (ins SPR:$Sn, SPR:$Sm),
                    NoItinerary, !strconcat("vsel", op, ".f16\t$Sd, $Sn, $Sm"),
                    []>,
def VCMPZH  : AHuI<0b11101, 0b11, 0b0101, 0b01, 0,
   let Inst{3-0} = 0b0000;
   let Inst{5}   = 0;
 }
 } // Defs = [FPSCR_NZCV]
 
 def VCVTDS  : ASuI<0b11101, 0b11, 0b0111, 0b11, 0,
                    (outs DPR:$Dd), (ins SPR:$Sm),
                    IIC_fpCVTDS, "vcvt", ".f64.f32\t$Dd, $Sm",
-                   [(set DPR:$Dd, (fpextend SPR:$Sm))]> {
+                   [(set DPR:$Dd, (fpextend SPR:$Sm))]>,
+             Sched<[WriteFPCVT]> {
   // Instruction operands.
   bits<5> Dd;
   bits<5> Sm;
 
   // Encode instruction operands.
   let Inst{3-0}   = Sm{4-1};
   let Inst{5}     = Sm{0};
   let Inst{15-12} = Dd{3-0};
   let Inst{22}    = Dd{4};
 
   let Predicates = [HasVFP2, HasDPVFP];
 }
 
 // Special case encoding: bits 11-8 is 0b1011.
 def VCVTSD  : VFPAI<(outs SPR:$Sd), (ins DPR:$Dm), VFPUnaryFrm,
                     IIC_fpCVTSD, "vcvt", ".f32.f64\t$Sd, $Dm",
-                    [(set SPR:$Sd, (fpround DPR:$Dm))]> {
+                    [(set SPR:$Sd, (fpround DPR:$Dm))]>,
+              Sched<[WriteFPCVT]> {
   // Instruction operands.
   bits<5> Sd;
   bits<5> Dm;
 
   // Encode instruction operands.
   let Inst{3-0}   = Dm{3-0};
   let Inst{5}     = Dm{4};
   let Inst{15-12} = Sd{4-1};

 }
 
 // Between half, single and double-precision.  For disassembly only.
 
 // FIXME: Verify encoding after integrated assembler is working.
 def VCVTBHS: ASuI<0b11101, 0b11, 0b0010, 0b01, 0, (outs SPR:$Sd), (ins SPR:$Sm),
                  /* FIXME */ IIC_fpCVTSH, "vcvtb", ".f32.f16\t$Sd, $Sm",
                  [/* For disassembly only; pattern left blank */]>,
-                 Requires<[HasFP16]>;
+                 Requires<[HasFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VCVTBSH: ASuI<0b11101, 0b11, 0b0011, 0b01, 0, (outs SPR:$Sd), (ins SPR:$Sm),
                  /* FIXME */ IIC_fpCVTHS, "vcvtb", ".f16.f32\t$Sd, $Sm",
                  [/* For disassembly only; pattern left blank */]>,
-                 Requires<[HasFP16]>;
+                 Requires<[HasFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VCVTTHS: ASuI<0b11101, 0b11, 0b0010, 0b11, 0, (outs SPR:$Sd), (ins SPR:$Sm),
                  /* FIXME */ IIC_fpCVTSH, "vcvtt", ".f32.f16\t$Sd, $Sm",
                  [/* For disassembly only; pattern left blank */]>,
-                 Requires<[HasFP16]>;
+                 Requires<[HasFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VCVTTSH: ASuI<0b11101, 0b11, 0b0011, 0b11, 0, (outs SPR:$Sd), (ins SPR:$Sm),
                  /* FIXME */ IIC_fpCVTHS, "vcvtt", ".f16.f32\t$Sd, $Sm",
                  [/* For disassembly only; pattern left blank */]>,
-                 Requires<[HasFP16]>;
+                 Requires<[HasFP16]>,
+            Sched<[WriteFPCVT]>;
 
 def VCVTBHD : ADuI<0b11101, 0b11, 0b0010, 0b01, 0,
                    (outs DPR:$Dd), (ins SPR:$Sm),
                    NoItinerary, "vcvtb", ".f64.f16\t$Dd, $Sm",
-                   []>, Requires<[HasFPARMv8, HasDPVFP]> {
+                   []>, Requires<[HasFPARMv8, HasDPVFP]>,
+              Sched<[WriteFPCVT]> {
   // Instruction operands.
   bits<5> Sm;
 
   // Encode instruction operands.
   let Inst{3-0} = Sm{4-1};
   let Inst{5}   = Sm{0};
 }
 

 defm VRINTA : vrint_inst_anpm<"a", 0b00, fround>;
 defm VRINTN : vrint_inst_anpm<"n", 0b01>;
 defm VRINTP : vrint_inst_anpm<"p", 0b10, fceil>;
 defm VRINTM : vrint_inst_anpm<"m", 0b11, ffloor>;
 
 def VSQRTD : ADuI<0b11101, 0b11, 0b0001, 0b11, 0,
                   (outs DPR:$Dd), (ins DPR:$Dm),
                   IIC_fpSQRT64, "vsqrt", ".f64\t$Dd, $Dm",
-                  [(set DPR:$Dd, (fsqrt (f64 DPR:$Dm)))]>;
+                  [(set DPR:$Dd, (fsqrt (f64 DPR:$Dm)))]>,
+             Sched<[WriteFPSQRT64]>;
 
 def VSQRTS : ASuI<0b11101, 0b11, 0b0001, 0b11, 0,
                   (outs SPR:$Sd), (ins SPR:$Sm),
                   IIC_fpSQRT32, "vsqrt", ".f32\t$Sd, $Sm",
-                  [(set SPR:$Sd, (fsqrt SPR:$Sm))]>;
+                  [(set SPR:$Sd, (fsqrt SPR:$Sm))]>,
+             Sched<[WriteFPSQRT32]>;
 
 def VSQRTH : AHuI<0b11101, 0b11, 0b0001, 0b11, 0,
                   (outs SPR:$Sd), (ins SPR:$Sm),
                   IIC_fpSQRT16, "vsqrt", ".f16\t$Sd, $Sm",
                   []>;
 
 let hasSideEffects = 0 in {
 def VMOVD  : ADuI<0b11101, 0b11, 0b0000, 0b01, 0,

 
 //===----------------------------------------------------------------------===//
 // FP <-> GPR Copies.  Int <-> FP Conversions.
 //
 
 def VMOVRS : AVConv2I<0b11100001, 0b1010,
                       (outs GPR:$Rt), (ins SPR:$Sn),
                       IIC_fpMOVSI, "vmov", "\t$Rt, $Sn",
-                      [(set GPR:$Rt, (bitconvert SPR:$Sn))]> {
+                      [(set GPR:$Rt, (bitconvert SPR:$Sn))]>,
+             Sched<[WriteFPMOV]> {
   // Instruction operands.
   bits<4> Rt;
   bits<5> Sn;
 
   // Encode instruction operands.
   let Inst{19-16} = Sn{4-1};
   let Inst{7}     = Sn{0};
   let Inst{15-12} = Rt;
 
   let Inst{6-5}   = 0b00;
   let Inst{3-0}   = 0b0000;
 
   // Some single precision VFP instructions may be executed on both NEON and VFP
   // pipelines.
   let D = VFPNeonDomain;
 }
 
 // Bitcast i32 -> f32.  NEON prefers to use VMOVDRR.
 def VMOVSR : AVConv4I<0b11100000, 0b1010,
                       (outs SPR:$Sn), (ins GPR:$Rt),
                       IIC_fpMOVIS, "vmov", "\t$Sn, $Rt",
                       [(set SPR:$Sn, (bitconvert GPR:$Rt))]>,
-             Requires<[HasVFP2, UseVMOVSR]> {
+             Requires<[HasVFP2, UseVMOVSR]>,
+             Sched<[WriteFPMOV]> {
   // Instruction operands.
   bits<5> Sn;
   bits<4> Rt;
 
   // Encode instruction operands.
   let Inst{19-16} = Sn{4-1};
   let Inst{7}     = Sn{0};
   let Inst{15-12} = Rt;
 
   let Inst{6-5}   = 0b00;
   let Inst{3-0}   = 0b0000;
 
   // Some single precision VFP instructions may be executed on both NEON and VFP
   // pipelines.
   let D = VFPNeonDomain;
 }
 
 let hasSideEffects = 0 in {
 def VMOVRRD  : AVConv3I<0b11000101, 0b1011,
                         (outs GPR:$Rt, GPR:$Rt2), (ins DPR:$Dm),
                         IIC_fpMOVDI, "vmov", "\t$Rt, $Rt2, $Dm",
-                 [/* FIXME: Can't write pattern for multiple result instr*/]> {
+                 [/* FIXME: Can't write pattern for multiple result instr*/]>,
+               Sched<[WriteFPMOV]> {
   // Instruction operands.
   bits<5> Dm;
   bits<4> Rt;
   bits<4> Rt2;
 
   // Encode instruction operands.
   let Inst{3-0}   = Dm{3-0};
   let Inst{5}     = Dm{4};
def VMOVRRD  : AVConv3I<0b11000101, 0b1011,
   // $Rt = EXTRACT_SUBREG $Dm, ssub_0
   // $Rt2 = EXTRACT_SUBREG $Dm, ssub_1
   let isExtractSubreg = 1;
 }
 
 def VMOVRRS  : AVConv3I<0b11000101, 0b1010,
                       (outs GPR:$Rt, GPR:$Rt2), (ins SPR:$src1, SPR:$src2),
                  IIC_fpMOVDI, "vmov", "\t$Rt, $Rt2, $src1, $src2",
-                 [/* For disassembly only; pattern left blank */]> {
+                 [/* For disassembly only; pattern left blank */]>,
+               Sched<[WriteFPMOV]> {
   bits<5> src1;
   bits<4> Rt;
   bits<4> Rt2;
 
   // Encode instruction operands.
   let Inst{3-0}   = src1{4-1};
   let Inst{5}     = src1{0};
   let Inst{15-12} = Rt;

 } // hasSideEffects
 
 // FMDHR: GPR -> SPR
 // FMDLR: GPR -> SPR
 
 def VMOVDRR : AVConv5I<0b11000100, 0b1011,
                       (outs DPR:$Dm), (ins GPR:$Rt, GPR:$Rt2),
                       IIC_fpMOVID, "vmov", "\t$Dm, $Rt, $Rt2",
-                      [(set DPR:$Dm, (arm_fmdrr GPR:$Rt, GPR:$Rt2))]> {
+                      [(set DPR:$Dm, (arm_fmdrr GPR:$Rt, GPR:$Rt2))]>,
+              Sched<[WriteFPMOV]> {
   // Instruction operands.
   bits<5> Dm;
   bits<4> Rt;
   bits<4> Rt2;
 
   // Encode instruction operands.
   let Inst{3-0}   = Dm{3-0};
   let Inst{5}     = Dm{4};

 def : Pat<(fneg (arm_fmdrr GPR:$Rl, GPR:$Rh)),
           (VMOVDRR GPR:$Rl, (t2EORri GPR:$Rh, (i32 0x80000000)))>,
       Requires<[IsThumb2]>;
 
 let hasSideEffects = 0 in
 def VMOVSRR : AVConv5I<0b11000100, 0b1010,
                      (outs SPR:$dst1, SPR:$dst2), (ins GPR:$src1, GPR:$src2),
                 IIC_fpMOVID, "vmov", "\t$dst1, $dst2, $src1, $src2",
-                [/* For disassembly only; pattern left blank */]> {
+                [/* For disassembly only; pattern left blank */]>,
+              Sched<[WriteFPMOV]> {
   // Instruction operands.
   bits<5> dst1;
   bits<4> src1;
   bits<4> src2;
 
   // Encode instruction operands.
   let Inst{3-0}   = dst1{4-1};
   let Inst{5}     = dst1{0};
def VMOVSRR : AVConv5I<0b11000100, 0b1010,
   let DecoderMethod = "DecodeVMOVSRR";
 }
 
 // Move H->R, clearing top 16 bits
 def VMOVRH : AVConv2I<0b11100001, 0b1001,
                       (outs GPR:$Rt), (ins SPR:$Sn),
                       IIC_fpMOVSI, "vmov", ".f16\t$Rt, $Sn",
                       []>,
-             Requires<[HasFullFP16]> {
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPMOV]> {
   // Instruction operands.
   bits<4> Rt;
   bits<5> Sn;
 
   // Encode instruction operands.
   let Inst{19-16} = Sn{4-1};
   let Inst{7}     = Sn{0};
   let Inst{15-12} = Rt;
 
   let Inst{6-5}   = 0b00;
   let Inst{3-0}   = 0b0000;
 }
 
 // Move R->H, clearing top 16 bits
 def VMOVHR : AVConv4I<0b11100000, 0b1001,
                       (outs SPR:$Sn), (ins GPR:$Rt),
                       IIC_fpMOVIS, "vmov", ".f16\t$Sn, $Rt",
                       []>,
-             Requires<[HasFullFP16]> {
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPMOV]> {
   // Instruction operands.
   bits<5> Sn;
   bits<4> Rt;
 
   // Encode instruction operands.
   let Inst{19-16} = Sn{4-1};
   let Inst{7}     = Sn{0};
   let Inst{15-12} = Rt;
class AVConv1IHs_Encode<bits<5> opcod1, bits<2> opcod2, bits<4> opcod3,
   let Inst{22}    = Sd{0};
 
   let Predicates = [HasFullFP16];
 }
 
 def VSITOD : AVConv1IDs_Encode<0b11101, 0b11, 0b1000, 0b1011,
                                (outs DPR:$Dd), (ins SPR:$Sm),
                                IIC_fpCVTID, "vcvt", ".f64.s32\t$Dd, $Sm",
-                               []> {
+                               []>,
+             Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // s32
 }
 
 let Predicates=[HasVFP2, HasDPVFP] in {
   def : VFPPat<(f64 (sint_to_fp GPR:$a)),
                (VSITOD (COPY_TO_REGCLASS GPR:$a, SPR))>;
 
   def : VFPPat<(f64 (sint_to_fp (i32 (alignedload32 addrmode5:$a)))),
                (VSITOD (VLDRS addrmode5:$a))>;
 }
 
 def VSITOS : AVConv1InSs_Encode<0b11101, 0b11, 0b1000, 0b1010,
                                 (outs SPR:$Sd),(ins SPR:$Sm),
                                 IIC_fpCVTIS, "vcvt", ".f32.s32\t$Sd, $Sm",
-                                []> {
+                                []>,
+             Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // s32
 
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def : VFPNoNEONPat<(f32 (sint_to_fp GPR:$a)),
                    (VSITOS (COPY_TO_REGCLASS GPR:$a, SPR))>;
 
 def : VFPNoNEONPat<(f32 (sint_to_fp (i32 (alignedload32 addrmode5:$a)))),
                    (VSITOS (VLDRS addrmode5:$a))>;
 
 def VSITOH : AVConv1IHs_Encode<0b11101, 0b11, 0b1000, 0b1001,
                                (outs SPR:$Sd), (ins SPR:$Sm),
                                IIC_fpCVTIH, "vcvt", ".f16.s32\t$Sd, $Sm",
-                               []> {
+                               []>,
+             Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // s32
 }
 
 def VUITOD : AVConv1IDs_Encode<0b11101, 0b11, 0b1000, 0b1011,
                                (outs DPR:$Dd), (ins SPR:$Sm),
                                IIC_fpCVTID, "vcvt", ".f64.u32\t$Dd, $Sm",
-                               []> {
+                               []>,
+             Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // u32
 }
 
 let Predicates=[HasVFP2, HasDPVFP] in {
   def : VFPPat<(f64 (uint_to_fp GPR:$a)),
                (VUITOD (COPY_TO_REGCLASS GPR:$a, SPR))>;
 
   def : VFPPat<(f64 (uint_to_fp (i32 (alignedload32 addrmode5:$a)))),
                (VUITOD (VLDRS addrmode5:$a))>;
 }
 
 def VUITOS : AVConv1InSs_Encode<0b11101, 0b11, 0b1000, 0b1010,
                                 (outs SPR:$Sd), (ins SPR:$Sm),
                                 IIC_fpCVTIS, "vcvt", ".f32.u32\t$Sd, $Sm",
-                                []> {
+                                []>,
+             Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // u32
 
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def : VFPNoNEONPat<(f32 (uint_to_fp GPR:$a)),
                    (VUITOS (COPY_TO_REGCLASS GPR:$a, SPR))>;
 
 def : VFPNoNEONPat<(f32 (uint_to_fp (i32 (alignedload32 addrmode5:$a)))),
                    (VUITOS (VLDRS addrmode5:$a))>;
 
 def VUITOH : AVConv1IHs_Encode<0b11101, 0b11, 0b1000, 0b1001,
                                 (outs SPR:$Sd), (ins SPR:$Sm),
                                 IIC_fpCVTIH, "vcvt", ".f16.u32\t$Sd, $Sm",
-                                []> {
+                                []>,
+             Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // u32
 }
 
 // FP -> Int:
 
 class AVConv1IsD_Encode<bits<5> opcod1, bits<2> opcod2, bits<4> opcod3,
                         bits<4> opcod4, dag oops, dag iops,
                         InstrItinClass itin, string opc, string asm,
class AVConv1IsH_Encode<bits<5> opcod1, bits<2> opcod2, bits<4> opcod3,
 
   let Predicates = [HasFullFP16];
 }
 
 // Always set Z bit in the instruction, i.e. "round towards zero" variants.
 def VTOSIZD : AVConv1IsD_Encode<0b11101, 0b11, 0b1101, 0b1011,
                                 (outs SPR:$Sd), (ins DPR:$Dm),
                                 IIC_fpCVTDI, "vcvt", ".s32.f64\t$Sd, $Dm",
-                                []> {
+                                []>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // Z bit
 }
 
 let Predicates=[HasVFP2, HasDPVFP] in {
   def : VFPPat<(i32 (fp_to_sint (f64 DPR:$a))),
                (COPY_TO_REGCLASS (VTOSIZD DPR:$a), GPR)>;
 
   def : VFPPat<(alignedstore32 (i32 (fp_to_sint (f64 DPR:$a))), addrmode5:$ptr),
                (VSTRS (VTOSIZD DPR:$a), addrmode5:$ptr)>;
 }
 
 def VTOSIZS : AVConv1InsS_Encode<0b11101, 0b11, 0b1101, 0b1010,
                                  (outs SPR:$Sd), (ins SPR:$Sm),
                                  IIC_fpCVTSI, "vcvt", ".s32.f32\t$Sd, $Sm",
-                                 []> {
+                                 []>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // Z bit
 
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def : VFPNoNEONPat<(i32 (fp_to_sint SPR:$a)),
                    (COPY_TO_REGCLASS (VTOSIZS SPR:$a), GPR)>;
 
 def : VFPNoNEONPat<(alignedstore32 (i32 (fp_to_sint (f32 SPR:$a))),
                                    addrmode5:$ptr),
                    (VSTRS (VTOSIZS SPR:$a), addrmode5:$ptr)>;
 
 def VTOSIZH : AVConv1IsH_Encode<0b11101, 0b11, 0b1101, 0b1001,
                                  (outs SPR:$Sd), (ins SPR:$Sm),
                                  IIC_fpCVTHI, "vcvt", ".s32.f16\t$Sd, $Sm",
-                                 []> {
+                                 []>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // Z bit
 }
 
 def VTOUIZD : AVConv1IsD_Encode<0b11101, 0b11, 0b1100, 0b1011,
                                (outs SPR:$Sd), (ins DPR:$Dm),
                                IIC_fpCVTDI, "vcvt", ".u32.f64\t$Sd, $Dm",
-                               []> {
+                               []>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // Z bit
 }
 
 let Predicates=[HasVFP2, HasDPVFP] in {
   def : VFPPat<(i32 (fp_to_uint (f64 DPR:$a))),
                (COPY_TO_REGCLASS (VTOUIZD DPR:$a), GPR)>;
 
   def : VFPPat<(alignedstore32 (i32 (fp_to_uint (f64 DPR:$a))), addrmode5:$ptr),
                (VSTRS (VTOUIZD DPR:$a), addrmode5:$ptr)>;
 }
 
 def VTOUIZS : AVConv1InsS_Encode<0b11101, 0b11, 0b1100, 0b1010,
                                  (outs SPR:$Sd), (ins SPR:$Sm),
                                  IIC_fpCVTSI, "vcvt", ".u32.f32\t$Sd, $Sm",
-                                 []> {
+                                 []>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // Z bit
 
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def : VFPNoNEONPat<(i32 (fp_to_uint SPR:$a)),
                    (COPY_TO_REGCLASS (VTOUIZS SPR:$a), GPR)>;
 
 def : VFPNoNEONPat<(alignedstore32 (i32 (fp_to_uint (f32 SPR:$a))),
                                    addrmode5:$ptr),
                   (VSTRS (VTOUIZS SPR:$a), addrmode5:$ptr)>;
 
 def VTOUIZH : AVConv1IsH_Encode<0b11101, 0b11, 0b1100, 0b1001,
                                  (outs SPR:$Sd), (ins SPR:$Sm),
                                  IIC_fpCVTHI, "vcvt", ".u32.f16\t$Sd, $Sm",
-                                 []> {
+                                 []>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 1; // Z bit
 }
 
 // And the Z bit '0' variants, i.e. use the rounding mode specified by FPSCR.
 let Uses = [FPSCR] in {
 // FIXME: Verify encoding after integrated assembler is working.
 def VTOSIRD : AVConv1IsD_Encode<0b11101, 0b11, 0b1101, 0b1011,
                                 (outs SPR:$Sd), (ins DPR:$Dm),
                                 IIC_fpCVTDI, "vcvtr", ".s32.f64\t$Sd, $Dm",
-                                [(set SPR:$Sd, (int_arm_vcvtr (f64 DPR:$Dm)))]>{
+                                [(set SPR:$Sd, (int_arm_vcvtr (f64 DPR:$Dm)))]>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // Z bit
 }
 
 def VTOSIRS : AVConv1InsS_Encode<0b11101, 0b11, 0b1101, 0b1010,
                                  (outs SPR:$Sd), (ins SPR:$Sm),
                                  IIC_fpCVTSI, "vcvtr", ".s32.f32\t$Sd, $Sm",
-                                 [(set SPR:$Sd, (int_arm_vcvtr SPR:$Sm))]> {
+                                 [(set SPR:$Sd, (int_arm_vcvtr SPR:$Sm))]>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // Z bit
 }
 
 def VTOSIRH : AVConv1IsH_Encode<0b11101, 0b11, 0b1101, 0b1001,
                                  (outs SPR:$Sd), (ins SPR:$Sm),
                                  IIC_fpCVTHI, "vcvtr", ".s32.f16\t$Sd, $Sm",
-                                 []> {
+                                 []>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // Z bit
 }
 
 def VTOUIRD : AVConv1IsD_Encode<0b11101, 0b11, 0b1100, 0b1011,
                                 (outs SPR:$Sd), (ins DPR:$Dm),
                                 IIC_fpCVTDI, "vcvtr", ".u32.f64\t$Sd, $Dm",
-                                [(set SPR:$Sd, (int_arm_vcvtru(f64 DPR:$Dm)))]>{
+                                [(set SPR:$Sd, (int_arm_vcvtru(f64 DPR:$Dm)))]>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // Z bit
 }
 
 def VTOUIRS : AVConv1InsS_Encode<0b11101, 0b11, 0b1100, 0b1010,
                                  (outs SPR:$Sd), (ins SPR:$Sm),
                                  IIC_fpCVTSI, "vcvtr", ".u32.f32\t$Sd, $Sm",
-                                 [(set SPR:$Sd, (int_arm_vcvtru SPR:$Sm))]> {
+                                 [(set SPR:$Sd, (int_arm_vcvtru SPR:$Sm))]>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // Z bit
 }
 
 def VTOUIRH : AVConv1IsH_Encode<0b11101, 0b11, 0b1100, 0b1001,
                                  (outs SPR:$Sd), (ins SPR:$Sm),
                                  IIC_fpCVTHI, "vcvtr", ".u32.f16\t$Sd, $Sm",
-                                 []> {
+                                 []>,
+              Sched<[WriteFPCVT]> {
   let Inst{7} = 0; // Z bit
 }
 }
 
 // Convert between floating-point and fixed-point
 // Data type for fixed-point naming convention:
 //   S16 (U=0, sx=0) -> SH
 //   U16 (U=1, sx=0) -> UH
 //   S32 (U=0, sx=1) -> SL
 //   U32 (U=1, sx=1) -> UL
 
 let Constraints = "$a = $dst" in {
 
 // FP to Fixed-Point:
 
 // Single Precision register
 class AVConv1XInsS_Encode<bits<5> op1, bits<2> op2, bits<4> op3, bits<4> op4,
                           bit op5, dag oops, dag iops, InstrItinClass itin,
                           string opc, string asm, list<dag> pattern>
-  : AVConv1XI<op1, op2, op3, op4, op5, oops, iops, itin, opc, asm, pattern>,
-  Sched<[WriteCvtFP]> {
+  : AVConv1XI<op1, op2, op3, op4, op5, oops, iops, itin, opc, asm, pattern> {
   bits<5> dst;
   // if dp_operation then UInt(D:Vd) else UInt(Vd:D);
   let Inst{22} = dst{0};
   let Inst{15-12} = dst{4-1};
 }
 
 // Double Precision register
 class AVConv1XInsD_Encode<bits<5> op1, bits<2> op2, bits<4> op3, bits<4> op4,
                           bit op5, dag oops, dag iops, InstrItinClass itin,
                           string opc, string asm, list<dag> pattern>
-  : AVConv1XI<op1, op2, op3, op4, op5, oops, iops, itin, opc, asm, pattern>,
-    Sched<[WriteCvtFP]> {
+  : AVConv1XI<op1, op2, op3, op4, op5, oops, iops, itin, opc, asm, pattern> {
   bits<5> dst;
   // if dp_operation then UInt(D:Vd) else UInt(Vd:D);
   let Inst{22} = dst{4};
   let Inst{15-12} = dst{3-0};
 
   let Predicates = [HasVFP2, HasDPVFP];
 }
 
 def VTOSHH : AVConv1XInsS_Encode<0b11101, 0b11, 0b1110, 0b1001, 0,
                        (outs SPR:$dst), (ins SPR:$a, fbits16:$fbits),
                  IIC_fpCVTHI, "vcvt", ".s16.f16\t$dst, $a, $fbits", []>,
-             Requires<[HasFullFP16]>;
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VTOUHH : AVConv1XInsS_Encode<0b11101, 0b11, 0b1111, 0b1001, 0,
                        (outs SPR:$dst), (ins SPR:$a, fbits16:$fbits),
                  IIC_fpCVTHI, "vcvt", ".u16.f16\t$dst, $a, $fbits", []>,
-             Requires<[HasFullFP16]>;
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VTOSLH : AVConv1XInsS_Encode<0b11101, 0b11, 0b1110, 0b1001, 1,
                        (outs SPR:$dst), (ins SPR:$a, fbits32:$fbits),
                  IIC_fpCVTHI, "vcvt", ".s32.f16\t$dst, $a, $fbits", []>,
-             Requires<[HasFullFP16]>;
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VTOULH : AVConv1XInsS_Encode<0b11101, 0b11, 0b1111, 0b1001, 1,
                        (outs SPR:$dst), (ins SPR:$a, fbits32:$fbits),
                  IIC_fpCVTHI, "vcvt", ".u32.f16\t$dst, $a, $fbits", []>,
-             Requires<[HasFullFP16]>;
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VTOSHS : AVConv1XInsS_Encode<0b11101, 0b11, 0b1110, 0b1010, 0,
                        (outs SPR:$dst), (ins SPR:$a, fbits16:$fbits),
-                 IIC_fpCVTSI, "vcvt", ".s16.f32\t$dst, $a, $fbits", []> {
+                 IIC_fpCVTSI, "vcvt", ".s16.f32\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VTOUHS : AVConv1XInsS_Encode<0b11101, 0b11, 0b1111, 0b1010, 0,
                        (outs SPR:$dst), (ins SPR:$a, fbits16:$fbits),
                  IIC_fpCVTSI, "vcvt", ".u16.f32\t$dst, $a, $fbits", []> {
def VTOULS : AVConv1XInsS_Encode<0b11101, 0b11, 0b1111, 0b1010, 1,
                  IIC_fpCVTSI, "vcvt", ".u32.f32\t$dst, $a, $fbits", []> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VTOSHD : AVConv1XInsD_Encode<0b11101, 0b11, 0b1110, 0b1011, 0,
                        (outs DPR:$dst), (ins DPR:$a, fbits16:$fbits),
-                 IIC_fpCVTDI, "vcvt", ".s16.f64\t$dst, $a, $fbits", []>;
+                 IIC_fpCVTDI, "vcvt", ".s16.f64\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]>;
 
 def VTOUHD : AVConv1XInsD_Encode<0b11101, 0b11, 0b1111, 0b1011, 0,
                        (outs DPR:$dst), (ins DPR:$a, fbits16:$fbits),
-                 IIC_fpCVTDI, "vcvt", ".u16.f64\t$dst, $a, $fbits", []>;
+                 IIC_fpCVTDI, "vcvt", ".u16.f64\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]>;
 
 def VTOSLD : AVConv1XInsD_Encode<0b11101, 0b11, 0b1110, 0b1011, 1,
                        (outs DPR:$dst), (ins DPR:$a, fbits32:$fbits),
-                 IIC_fpCVTDI, "vcvt", ".s32.f64\t$dst, $a, $fbits", []>;
+                 IIC_fpCVTDI, "vcvt", ".s32.f64\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]>;
 
 def VTOULD : AVConv1XInsD_Encode<0b11101, 0b11, 0b1111, 0b1011, 1,
                        (outs DPR:$dst), (ins DPR:$a, fbits32:$fbits),
-                 IIC_fpCVTDI, "vcvt", ".u32.f64\t$dst, $a, $fbits", []>;
+                 IIC_fpCVTDI, "vcvt", ".u32.f64\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]>;
 
 // Fixed-Point to FP:
 
 def VSHTOH : AVConv1XInsS_Encode<0b11101, 0b11, 0b1010, 0b1001, 0,
                        (outs SPR:$dst), (ins SPR:$a, fbits16:$fbits),
                  IIC_fpCVTIH, "vcvt", ".f16.s16\t$dst, $a, $fbits", []>,
-             Requires<[HasFullFP16]>;
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VUHTOH : AVConv1XInsS_Encode<0b11101, 0b11, 0b1011, 0b1001, 0,
                        (outs SPR:$dst), (ins SPR:$a, fbits16:$fbits),
                  IIC_fpCVTIH, "vcvt", ".f16.u16\t$dst, $a, $fbits", []>,
-             Requires<[HasFullFP16]>;
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VSLTOH : AVConv1XInsS_Encode<0b11101, 0b11, 0b1010, 0b1001, 1,
                        (outs SPR:$dst), (ins SPR:$a, fbits32:$fbits),
                  IIC_fpCVTIH, "vcvt", ".f16.s32\t$dst, $a, $fbits", []>,
-             Requires<[HasFullFP16]>;
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VULTOH : AVConv1XInsS_Encode<0b11101, 0b11, 0b1011, 0b1001, 1,
                        (outs SPR:$dst), (ins SPR:$a, fbits32:$fbits),
                  IIC_fpCVTIH, "vcvt", ".f16.u32\t$dst, $a, $fbits", []>,
-             Requires<[HasFullFP16]>;
+             Requires<[HasFullFP16]>,
+             Sched<[WriteFPCVT]>;
 
 def VSHTOS : AVConv1XInsS_Encode<0b11101, 0b11, 0b1010, 0b1010, 0,
                        (outs SPR:$dst), (ins SPR:$a, fbits16:$fbits),
-                 IIC_fpCVTIS, "vcvt", ".f32.s16\t$dst, $a, $fbits", []> {
+                 IIC_fpCVTIS, "vcvt", ".f32.s16\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VUHTOS : AVConv1XInsS_Encode<0b11101, 0b11, 0b1011, 0b1010, 0,
                        (outs SPR:$dst), (ins SPR:$a, fbits16:$fbits),
-                 IIC_fpCVTIS, "vcvt", ".f32.u16\t$dst, $a, $fbits", []> {
+                 IIC_fpCVTIS, "vcvt", ".f32.u16\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VSLTOS : AVConv1XInsS_Encode<0b11101, 0b11, 0b1010, 0b1010, 1,
                        (outs SPR:$dst), (ins SPR:$a, fbits32:$fbits),
-                 IIC_fpCVTIS, "vcvt", ".f32.s32\t$dst, $a, $fbits", []> {
+                 IIC_fpCVTIS, "vcvt", ".f32.s32\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VULTOS : AVConv1XInsS_Encode<0b11101, 0b11, 0b1011, 0b1010, 1,
                        (outs SPR:$dst), (ins SPR:$a, fbits32:$fbits),
-                 IIC_fpCVTIS, "vcvt", ".f32.u32\t$dst, $a, $fbits", []> {
+                 IIC_fpCVTIS, "vcvt", ".f32.u32\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VSHTOD : AVConv1XInsD_Encode<0b11101, 0b11, 0b1010, 0b1011, 0,
                        (outs DPR:$dst), (ins DPR:$a, fbits16:$fbits),
-                 IIC_fpCVTID, "vcvt", ".f64.s16\t$dst, $a, $fbits", []>;
+                 IIC_fpCVTID, "vcvt", ".f64.s16\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]>;
 
 def VUHTOD : AVConv1XInsD_Encode<0b11101, 0b11, 0b1011, 0b1011, 0,
                        (outs DPR:$dst), (ins DPR:$a, fbits16:$fbits),
-                 IIC_fpCVTID, "vcvt", ".f64.u16\t$dst, $a, $fbits", []>;
+                 IIC_fpCVTID, "vcvt", ".f64.u16\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]>;
 
 def VSLTOD : AVConv1XInsD_Encode<0b11101, 0b11, 0b1010, 0b1011, 1,
                        (outs DPR:$dst), (ins DPR:$a, fbits32:$fbits),
-                 IIC_fpCVTID, "vcvt", ".f64.s32\t$dst, $a, $fbits", []>;
+                 IIC_fpCVTID, "vcvt", ".f64.s32\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]>;
 
 def VULTOD : AVConv1XInsD_Encode<0b11101, 0b11, 0b1011, 0b1011, 1,
                        (outs DPR:$dst), (ins DPR:$a, fbits32:$fbits),
-                 IIC_fpCVTID, "vcvt", ".f64.u32\t$dst, $a, $fbits", []>;
+                 IIC_fpCVTID, "vcvt", ".f64.u32\t$dst, $a, $fbits", []>,
+             Sched<[WriteFPCVT]>;
 
 } // End of 'let Constraints = "$a = $dst" in'
 
 //===----------------------------------------------------------------------===//
 // FP Multiply-Accumulate Operations.
 //
 
 def VMLAD : ADbI<0b11100, 0b00, 0, 0,
                  (outs DPR:$Dd), (ins DPR:$Ddin, DPR:$Dn, DPR:$Dm),
                  IIC_fpMAC64, "vmla", ".f64\t$Dd, $Dn, $Dm",
                  [(set DPR:$Dd, (fadd_mlx (fmul_su DPR:$Dn, DPR:$Dm),
                                           (f64 DPR:$Ddin)))]>,
               RegConstraint<"$Ddin = $Dd">,
-              Requires<[HasVFP2,HasDPVFP,UseFPVMLx,DontUseFusedMAC]>;
+              Requires<[HasVFP2,HasDPVFP,UseFPVMLx,DontUseFusedMAC]>,
+              Sched<[WriteFPMAC64, ReadFPMAC, ReadFPMUL, ReadFPMUL]>;
 
 def VMLAS : ASbIn<0b11100, 0b00, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpMAC32, "vmla", ".f32\t$Sd, $Sn, $Sm",
                   [(set SPR:$Sd, (fadd_mlx (fmul_su SPR:$Sn, SPR:$Sm),
                                            SPR:$Sdin))]>,
               RegConstraint<"$Sdin = $Sd">,
-              Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]> {
+              Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]>,
+              Sched<[WriteFPMAC32, ReadFPMAC, ReadFPMUL, ReadFPMUL]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VMLAH : AHbI<0b11100, 0b00, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpMAC16, "vmla", ".f16\t$Sd, $Sn, $Sm",
def : Pat<(fadd_mlx SPR:$dstin, (fmul_su SPR:$a, SPR:$b)),
           Requires<[HasVFP2,DontUseNEONForFP, UseFPVMLx,DontUseFusedMAC]>;
 
 def VMLSD : ADbI<0b11100, 0b00, 1, 0,
                  (outs DPR:$Dd), (ins DPR:$Ddin, DPR:$Dn, DPR:$Dm),
                  IIC_fpMAC64, "vmls", ".f64\t$Dd, $Dn, $Dm",
                  [(set DPR:$Dd, (fadd_mlx (fneg (fmul_su DPR:$Dn,DPR:$Dm)),
                                           (f64 DPR:$Ddin)))]>,
               RegConstraint<"$Ddin = $Dd">,
-              Requires<[HasVFP2,HasDPVFP,UseFPVMLx,DontUseFusedMAC]>;
+              Requires<[HasVFP2,HasDPVFP,UseFPVMLx,DontUseFusedMAC]>,
+              Sched<[WriteFPMAC64, ReadFPMAC, ReadFPMUL, ReadFPMUL]>;
 
 def VMLSS : ASbIn<0b11100, 0b00, 1, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpMAC32, "vmls", ".f32\t$Sd, $Sn, $Sm",
                   [(set SPR:$Sd, (fadd_mlx (fneg (fmul_su SPR:$Sn, SPR:$Sm)),
                                            SPR:$Sdin))]>,
               RegConstraint<"$Sdin = $Sd">,
-              Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]> {
+              Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]>,
+              Sched<[WriteFPMAC32, ReadFPMAC, ReadFPMUL, ReadFPMUL]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VMLSH : AHbI<0b11100, 0b00, 1, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpMAC16, "vmls", ".f16\t$Sd, $Sn, $Sm",
def : Pat<(fsub_mlx SPR:$dstin, (fmul_su SPR:$a, SPR:$b)),
           Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]>;
 
 def VNMLAD : ADbI<0b11100, 0b01, 1, 0,
                   (outs DPR:$Dd), (ins DPR:$Ddin, DPR:$Dn, DPR:$Dm),
                   IIC_fpMAC64, "vnmla", ".f64\t$Dd, $Dn, $Dm",
                   [(set DPR:$Dd,(fsub_mlx (fneg (fmul_su DPR:$Dn,DPR:$Dm)),
                                           (f64 DPR:$Ddin)))]>,
                 RegConstraint<"$Ddin = $Dd">,
-                Requires<[HasVFP2,HasDPVFP,UseFPVMLx,DontUseFusedMAC]>;
+                Requires<[HasVFP2,HasDPVFP,UseFPVMLx,DontUseFusedMAC]>,
+                Sched<[WriteFPMAC64, ReadFPMAC, ReadFPMUL, ReadFPMUL]>;
 
 def VNMLAS : ASbI<0b11100, 0b01, 1, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpMAC32, "vnmla", ".f32\t$Sd, $Sn, $Sm",
                   [(set SPR:$Sd, (fsub_mlx (fneg (fmul_su SPR:$Sn, SPR:$Sm)),
                                            SPR:$Sdin))]>,
                 RegConstraint<"$Sdin = $Sd">,
-                Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]> {
+                Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]>,
+                Sched<[WriteFPMAC32, ReadFPMAC, ReadFPMUL, ReadFPMUL]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VNMLAH : AHbI<0b11100, 0b01, 1, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpMAC16, "vnmla", ".f16\t$Sd, $Sn, $Sm",
def : Pat<(fsub_mlx (fneg (fmul_su SPR:$a, SPR:$b)), SPR:$dstin),
           Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]>;
 
 def VNMLSD : ADbI<0b11100, 0b01, 0, 0,
                   (outs DPR:$Dd), (ins DPR:$Ddin, DPR:$Dn, DPR:$Dm),
                   IIC_fpMAC64, "vnmls", ".f64\t$Dd, $Dn, $Dm",
                   [(set DPR:$Dd, (fsub_mlx (fmul_su DPR:$Dn, DPR:$Dm),
                                            (f64 DPR:$Ddin)))]>,
                RegConstraint<"$Ddin = $Dd">,
-               Requires<[HasVFP2,HasDPVFP,UseFPVMLx,DontUseFusedMAC]>;
+               Requires<[HasVFP2,HasDPVFP,UseFPVMLx,DontUseFusedMAC]>,
+               Sched<[WriteFPMAC64, ReadFPMAC, ReadFPMUL, ReadFPMUL]>;
 
 def VNMLSS : ASbI<0b11100, 0b01, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpMAC32, "vnmls", ".f32\t$Sd, $Sn, $Sm",
              [(set SPR:$Sd, (fsub_mlx (fmul_su SPR:$Sn, SPR:$Sm), SPR:$Sdin))]>,
                          RegConstraint<"$Sdin = $Sd">,
-                Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]> {
+                Requires<[HasVFP2,DontUseNEONForFP,UseFPVMLx,DontUseFusedMAC]>,
+             Sched<[WriteFPMAC32, ReadFPMAC, ReadFPMUL, ReadFPMUL]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines on A8.
   let D = VFPNeonA8Domain;
 }
 
 def VNMLSH : AHbI<0b11100, 0b01, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpMAC16, "vnmls", ".f16\t$Sd, $Sn, $Sm",

 // Fused FP Multiply-Accumulate Operations.
 //
 def VFMAD : ADbI<0b11101, 0b10, 0, 0,
                  (outs DPR:$Dd), (ins DPR:$Ddin, DPR:$Dn, DPR:$Dm),
                  IIC_fpFMAC64, "vfma", ".f64\t$Dd, $Dn, $Dm",
                  [(set DPR:$Dd, (fadd_mlx (fmul_su DPR:$Dn, DPR:$Dm),
                                           (f64 DPR:$Ddin)))]>,
               RegConstraint<"$Ddin = $Dd">,
-              Requires<[HasVFP4,HasDPVFP,UseFusedMAC]>;
+              Requires<[HasVFP4,HasDPVFP,UseFusedMAC]>,
+            Sched<[WriteFPMAC64, ReadFPMAC, ReadFPMUL, ReadFPMUL]>;
 
 def VFMAS : ASbIn<0b11101, 0b10, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpFMAC32, "vfma", ".f32\t$Sd, $Sn, $Sm",
                   [(set SPR:$Sd, (fadd_mlx (fmul_su SPR:$Sn, SPR:$Sm),
                                            SPR:$Sdin))]>,
               RegConstraint<"$Sdin = $Sd">,
-              Requires<[HasVFP4,DontUseNEONForFP,UseFusedMAC]> {
+              Requires<[HasVFP4,DontUseNEONForFP,UseFusedMAC]>,
+            Sched<[WriteFPMAC32, ReadFPMAC, ReadFPMUL, ReadFPMUL]> {
   // Some single precision VFP instructions may be executed on both NEON and
   // VFP pipelines.
 }
 
 def VFMAH : AHbI<0b11101, 0b10, 0, 0,
                   (outs SPR:$Sd), (ins SPR:$Sdin, SPR:$Sn, SPR:$Sm),
                   IIC_fpFMAC16, "vfma", ".f16\t$Sd, $Sn, $Sm",
                   []>,
               RegConstraint<"$Sdin = $Sd">,
-              Requires<[HasFullFP16,UseFusedMAC]>;
+              Requires<[HasFullFP16,UseFusedMAC]>,
+            Sched<[WriteFPMAC32, ReadFPMAC, ReadFPMUL, ReadFPMUL]>;
 
 def : Pat<(fadd_mlx DPR:$dstin, (fmul_su DPR:$a, (f64 DPR:$b))),
           (VFMAD DPR:$dstin, DPR:$a, DPR:$b)>,
           Requires<[HasVFP4,HasDPVFP,UseFusedMAC]>;
 def : Pat<(fadd_mlx SPR:$dstin, (fmul_su SPR:$a, SPR:$b)),
           (VFMAS SPR:$dstin, SPR:$a, SPR:$b)>,
           Requires<[HasVFP4,DontUseNEONForFP,UseFusedMAC]>;
 

lib/Target/ARM/ARMSchedule.td

 //===-- ARMSchedule.td - ARM Scheduling Definitions --------*- tablegen -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //===----------------------------------------------------------------------===//
-// Instruction scheduling annotations for out-of-order CPUs.
+// Instruction scheduling annotations for in-order and out-of-order CPUs.
 // These annotations are independent of the itinerary class defined below.
 // Here we define the subtarget independent read/write per-operand resources.
 // The subtarget schedule definitions will then map these to the subtarget's
 // resource usages.
 // For example:
 // The instruction cycle timings table might contain an entry for an operation
 // like the following:
 // Rd <- ADD Rn, Rm, <shift> Rs

 //    Latency = 4; // Latency of 4.
 //    NumMicroOps = 2; // Dispatch 2 micro-ops.
 //    // The two instances of resource P01 are occupied for one cycle. It is one
 //    // cycle because these resources happen to be pipelined.
 //    ResourceCycles = [1, 1];
 //  }
 //  def : ReadAdvance<ReadAdvanceALUsr, 3>;
 
+//===----------------------------------------------------------------------===//
+// Sched definitions for intger pipeline instructions
+//
 // Basic ALU operation.
 def WriteALU : SchedWrite;
 def ReadALU : SchedRead;
 
 // Basic ALU with shifts.
 def WriteALUsi : SchedWrite; // Shift by immediate.
 def WriteALUsr : SchedWrite; // Shift by register.
 def WriteALUSsr : SchedWrite; // Shift by register (flag setting).

 def WriteLd : SchedWrite;
 def WritePreLd : SchedWrite;
 
 // Branches.
 def WriteBr : SchedWrite;
 def WriteBrL : SchedWrite;
 def WriteBrTbl : SchedWrite;
 
-// Fixpoint conversions.
-def WriteCvtFP : SchedWrite;
-
 // Noop.
 def WriteNoop : SchedWrite;
 
+//===----------------------------------------------------------------------===//
+// Sched definitions for floating-point and neon instructions
+//
+// Floating point conversions
+def WriteFPCVT : SchedWrite;
+def WriteFPMOV : SchedWrite; // FP -> GPR and vice-versa
+
+// ALU operations (32/64-bit)
+def WriteFPALU32 : SchedWrite;
+def WriteFPALU64 : SchedWrite;
+
+// Multiplication
+def WriteFPMUL32 : SchedWrite;
+def WriteFPMUL64 : SchedWrite;
+def ReadFPMUL    : SchedRead; // multiplier read
+def ReadFPMAC    : SchedRead; // accumulator read
+
+// Multiply-accumulate
+def WriteFPMAC32 : SchedWrite;
+def WriteFPMAC64 : SchedWrite;
+
+// Division
+def WriteFPDIV32 : SchedWrite;
+def WriteFPDIV64 : SchedWrite;
+
+// Square-root
+def WriteFPSQRT32 : SchedWrite;
+def WriteFPSQRT64 : SchedWrite;
+
 // Define TII for use in SchedVariant Predicates.
 def : PredicateProlog<[{
   const ARMBaseInstrInfo *TII =
     static_cast<const ARMBaseInstrInfo*>(SchedModel->getInstrInfo());
   (void)TII;
 }]>;
 
 def IsPredicatedPred : SchedPredicate<[{TII->isPredicated(*MI)}]>;

lib/Target/ARM/ARMScheduleA9.td

 // Multiplication
 def A9WriteM   : SchedWriteRes<[A9UnitMul, A9UnitMul]> { let Latency = 4; }
 def A9WriteMHi : SchedWriteRes<[A9UnitMul]> { let Latency = 5;
                                               let NumMicroOps = 0; }
 def A9WriteM16   : SchedWriteRes<[A9UnitMul]> { let Latency = 3; }
 def A9WriteM16Hi : SchedWriteRes<[A9UnitMul]> { let Latency = 4;
                                                 let NumMicroOps = 0; }
 
+def : WriteRes<WriteFPDIV32, [A9UnitFP, A9UnitAGU]> { let Latency = 15; }
+def : WriteRes<WriteFPDIV64, [A9UnitFP, A9UnitAGU]> { let Latency = 25; }
+def : WriteRes<WriteFPSQRT32, [A9UnitFP, A9UnitAGU]> { let Latency = 17; }
+def : WriteRes<WriteFPSQRT64, [A9UnitFP, A9UnitAGU]> { let Latency = 32; }
+
 // Floating-point
 // Only one FP or AGU instruction may issue per cycle. We model this
 // by having FP instructions consume the AGU resource.
 def A9WriteF      : SchedWriteRes<[A9UnitFP, A9UnitAGU]> { let Latency = 4; }
 def A9WriteFMov   : SchedWriteRes<[A9UnitFP, A9UnitAGU]> { let Latency = 1; }
 def A9WriteFMulS  : SchedWriteRes<[A9UnitFP, A9UnitAGU]> { let Latency = 5; }
 def A9WriteFMulD  : SchedWriteRes<[A9UnitFP, A9UnitAGU]> { let Latency = 6; }
 def A9WriteFMAS   : SchedWriteRes<[A9UnitFP, A9UnitAGU]> { let Latency = 8; }

 def :ItinRW<[A9WriteV10, A9Read2, A9Read2], [IIC_VRECSQ]>;
 
 // Map SchedRWs that are identical for cortexa9 to existing resources.
 def : SchedAlias<WriteALU, A9WriteALU>;
 def : SchedAlias<WriteALUsr, A9WriteALUsr>;
 def : SchedAlias<WriteALUSsr, A9WriteALUsr>;
 def : SchedAlias<ReadALU, A9ReadALU>;
 def : SchedAlias<ReadALUsr, A9ReadALU>;
+
+// ===---------------------------------------------------------------------===//
+// Floating-point. Map target defined SchedReadWrite to processor specific ones
+//
+def : WriteRes<WriteFPCVT, [A9UnitFP, A9UnitAGU]> { let Latency = 4; }
+def : SchedAlias<WriteFPMOV, A9WriteFMov>;
+
+def : SchedAlias<WriteFPALU32, A9WriteF>;
+def : SchedAlias<WriteFPALU64, A9WriteF>;
+
+def : SchedAlias<WriteFPMUL32, A9WriteFMulS>;
+def : SchedAlias<WriteFPMUL64, A9WriteFMulD>;
+
+def : SchedAlias<WriteFPMAC32, A9WriteFMAS>;
+def : SchedAlias<WriteFPMAC64, A9WriteFMAD>;
+
+def : ReadAdvance<ReadFPMUL, 0>;
+def : ReadAdvance<ReadFPMAC, 0>;
+
+// ===---------------------------------------------------------------------===//
+// Subtarget-specific overrides. Map opcodes to list of SchedReadWrite types.
+//
 def : InstRW< [WriteALU],
       (instregex "ANDri", "ORRri", "EORri", "BICri", "ANDrr", "ORRrr", "EORrr",
                  "BICrr")>;
 def : InstRW< [WriteALUsi], (instregex "ANDrsi", "ORRrsi", "EORrsi", "BICrsi")>;
 def : InstRW< [WriteALUsr], (instregex "ANDrsr", "ORRrsr", "EORrsr", "BICrsr")>;
 
 
 def : SchedAlias<WriteCMP, A9WriteALU>;

 def : InstRW<[A9WriteLbsi], (instregex "LDRrs")>;
 
 def : WriteRes<WriteDiv, []> { let Latency = 0; }
 
 def : WriteRes<WriteBr, [A9UnitB]>;
 def : WriteRes<WriteBrL, [A9UnitB]>;
 def : WriteRes<WriteBrTbl, [A9UnitB]>;
 def : WriteRes<WritePreLd, []>;
-def : SchedAlias<WriteCvtFP, A9WriteF>;
+//def : SchedAlias<WriteCvtFP, A9WriteF>;
 def : WriteRes<WriteNoop, []> { let Latency = 0; let NumMicroOps = 0; }
 } // SchedModel = CortexA9Model

lib/Target/ARM/ARMScheduleR52.td

 
 // Branches  - LR written in Late EX2
 def : WriteRes<WriteBr, [R52UnitB]> { let Latency = 0; }
 def : WriteRes<WriteBrL, [R52UnitB]> { let Latency = 0; }
 def : WriteRes<WriteBrTbl, [R52UnitALU]> { let Latency = 0; }
 
 // Misc
 def : WriteRes<WriteNoop, []> { let Latency = 0; let NumMicroOps = 0; }
-def : WriteRes<WriteCvtFP, [R52UnitALU]> { let Latency = 3; }
 
+// Integer pipeline by-passes
 def : ReadAdvance<ReadALU, 1>;   // Operand needed in EX1 stage
 def : ReadAdvance<ReadALUsr, 0>; // Shift operands needed in ISS
 
 
+// Floating-point. Map target-defined SchedReadWrites to subtarget
+def : WriteRes<WriteFPMUL32, [R52UnitFPMUL]> { let Latency = 6; }
+
+def : WriteRes<WriteFPMUL64, [R52UnitFPMUL, R52UnitFPMUL]> {
+  let Latency = 6;
+}
+
+def : WriteRes<WriteFPMAC32, [R52UnitFPMUL, R52UnitFPALU]> {
+  let Latency = 11;     // as it is internally two insns (MUL then ADD)
+}
+
+def : WriteRes<WriteFPMAC64, [R52UnitFPMUL, R52UnitFPMUL,
+                              R52UnitFPALU, R52UnitFPALU]> {
+  let Latency = 11;
+}
+
+def : WriteRes<WriteFPDIV32, [R52UnitDiv]> {
+  let Latency = 7;          // FP div takes fixed #cycles
+  let ResourceCycles = [7]; // is not pipelined
+}
+
+def : WriteRes<WriteFPDIV64, [R52UnitDiv]> {
+  let Latency = 17;
+  let ResourceCycles = [17];
+}
+
+def : WriteRes<WriteFPSQRT32, [R52UnitDiv]> { let Latency = 7; }
+def : WriteRes<WriteFPSQRT64, [R52UnitDiv]> { let Latency = 17; }
+
+def : ReadAdvance<ReadFPMUL, 1>; // mul operand read in F1
+def : ReadAdvance<ReadFPMAC, 1>; // fp-mac operand read in F1
+
+
 //===----------------------------------------------------------------------===//
 // Subtarget-specific SchedReadWrites.
 
 // Forwarding information - based on when an operand is read
 def : ReadAdvance<R52Read_ISS, 0>;
 def : ReadAdvance<R52Read_EX1, 1>;
 def : ReadAdvance<R52Read_EX2, 2>;
 def : ReadAdvance<R52Read_F0, 0>;

 def R52Write2FPMAC_F5  : SchedWriteRes<[R52UnitFPMUL, R52UnitFPMUL,
                                          R52UnitFPALU, R52UnitFPALU]> {
   let Latency = 11;
 }
 
 def R52WriteFPLd_F4    : SchedWriteRes<[R52UnitLd]> { let Latency = 5; }
 def R52WriteFPST_F4    : SchedWriteRes<[R52UnitLd]> { let Latency = 5; }
 
-def R52WriteFPDIV_SP   : SchedWriteRes<[R52UnitFPDIV]> {
-  let Latency = 7;          // FP div takes fixed #cycles
-  let ResourceCycles = [7]; // is not pipelined
- }
-def R52WriteFPDIV_DP   : SchedWriteRes<[R52UnitFPDIV]> {
-  let Latency = 17;
-  let ResourceCycles = [17];
-}
-
-
 //===----------------------------------------------------------------------===//
-// Subtarget-specific - map operands to SchedReadWrites
+// Floating-point. Map target defined SchedReadWrites to processor specific ones
+//
+def : SchedAlias<WriteFPCVT,   R52WriteFPALU_F5>;
+def : SchedAlias<WriteFPMOV, R52WriteFPALU_F3>;
+def : SchedAlias<WriteFPALU32, R52WriteFPALU_F5>;
+def : SchedAlias<WriteFPALU64, R52WriteFPALU_F5>;
 
+//===----------------------------------------------------------------------===//
+// Subtarget-specific overrides. Map opcodes to list of SchedReadWrites types.
+//
 def : InstRW<[WriteALU], (instrs COPY)>;
 
 def : InstRW<[R52WriteALU_EX2, R52Read_EX1, R52Read_ISS],
       (instregex "SXTB", "SXTH", "SXTB16", "UXTB", "UXTH", "UXTB16",
       "t2SXTB", "t2SXTH", "t2SXTB16", "t2UXTB", "t2UXTH", "t2UXTB16")>;
 
 def : InstRW<[R52WriteALU_EX1, R52Read_ISS],
       (instregex "MOVCCi32imm", "MOVi32imm", "MOV_ga_dyn", "t2MOVCCi",

 def : InstRW<[R52Write2FPALU_F5, R52Read_F1], (instregex "VABS(fq|hq)")>;
 
 def : InstRW<[R52WriteFPALU_F3, R52Read_F1, R52Read_F1], (instregex "(VACGE|VACGT)(fd|hd)")>;
 def : InstRW<[R52Write2FPALU_F3, R52Read_F1, R52Read_F1], (instregex "(VACGE|VACGT)(fq|hq)")>;
 
 def : InstRW<[R52WriteFPALU_F5, R52Read_F1, R52Read_F1], (instregex "(VADD|VSUB)(D|S|H|fd|hd)")>;
 def : InstRW<[R52Write2FPALU_F5, R52Read_F1, R52Read_F1], (instregex "(VADD|VSUB)(fq|hq)")>;
 
-def : InstRW<[R52WriteFPDIV_SP, R52Read_F0, R52Read_F0], (instregex "VDIV(S|H)")>;
-def : InstRW<[R52WriteFPDIV_DP, R52Read_F0, R52Read_F0], (instregex "VDIVD")>;
-
-def : InstRW<[R52WriteFPMAC_F5, R52Read_F1, R52Read_F1, R52Read_F1],
-                                          (instregex "(VFMA|VFMS|VFNMA|VFNMS)(D|H|S)")>;
-
 def : InstRW<[R52WriteFPLd_F4, R52Read_ISS, R52Read_F1], (instregex "VLDR")>;
 def : InstRW<[R52WriteFPST_F4, R52Read_ISS, R52Read_F1], (instregex "VSTR")>;
 
 
 //===----------------------------------------------------------------------===//
 // Neon Support
 
 // vector multiple load stores

 def : InstRW<[R52WriteFPMAC_F5, R52Read_F1, R52Read_F1, R52Read_F1], (instregex "(VFMA|VFMS)(f|h)d")>;
 def : InstRW<[R52Write2FPMAC_F5, R52Read_F1, R52Read_F1, R52Read_F1], (instregex "(VFMA|VFMS)(f|h)q")>;
 
 def : InstRW<[R52WriteFPALU_F4, R52Read_F2, R52Read_F2], (instregex "(VHADD|VHSUB)(u|s)(v8i8|v4i16|v2i32)")>;
 def : InstRW<[R52Write2FPALU_F4, R52Read_F2, R52Read_F2], (instregex "(VHADD|VHSUB)(u|s)(v16i8|v8i16|v4i32)")>;
 
 def : InstRW<[R52WriteVLDM], (instregex "VLDM[SD](IA|DB)$")>;
 def : InstRW<[R52WriteFPALU_F4, R52Read_F1, R52Read_F1], (instregex "VMAX", "VMIN", "VPMAX", "VPMIN")>;
-def : InstRW<[R52WriteFPALU_F3, R52Read_F1, R52Read_F1], (instregex "VMOV", "VORR", "VORN", "VREV")>;
+def : InstRW<[R52WriteFPALU_F3, R52Read_F1, R52Read_F1], (instregex "VORR", "VORN", "VREV")>;
 def : InstRW<[R52WriteNoRSRC_WRI], (instregex "VMRS")>;
-def : InstRW<[R52WriteFPMUL_F5, R52Read_F1, R52Read_F1, R52Read_F1], (instregex "VMUL", "VNMUL", "VMLA")>;
 def : InstRW<[R52WriteFPALU_F5, R52Read_F1], (instregex "VNEG")>;
 def : InstRW<[R52WriteFPALU_F4, R52Read_F1, R52Read_F1], (instregex "VPADDi")>;
 def : InstRW<[R52Write2FPALU_F4, R52Read_F1, R52Read_F1], (instregex "VPADAL", "VPADDL")>;
 def : InstRW<[R52WriteFPALU_F5, R52Read_F1], (instregex "VQABS(v8i8|v4i16|v2i32|v1i64)")>;
 def : InstRW<[R52Write2FPALU_F5, R52Read_F1], (instregex "VQABS(v16i8|v8i16|v4i32|v2i64)")>;
 def : InstRW<[R52WriteFPALU_F5, R52Read_F2, R52Read_F2],
                   (instregex "(VQADD|VQSUB)(u|s)(v8i8|v4i16|v2i32|v1i64)")>;
 def : InstRW<[R52Write2FPALU_F5, R52Read_F2, R52Read_F2],

lib/Target/ARM/ARMScheduleSwift.td

def SwiftDiv : SchedWriteRes<[SwiftUnitP0, SwiftUnitDiv]> {
     let Latency = 14;
     let ResourceCycles = [1, 14];
   }
   // 4.2.18 Integer Divide
   def : WriteRes<WriteDiv, [SwiftUnitDiv]>; // Workaround.
   def : InstRW <[SwiftDiv],
         (instregex "SDIV", "UDIV", "t2SDIV", "t2UDIV")>;
 
+
   // 4.2.19 Integer Load Single Element
   // 4.2.20 Integer Load Signextended
   def SwiftWriteP2P01ThreeCycle : SchedWriteRes<[SwiftUnitP2, SwiftUnitP01]> {
     let Latency = 3;
     let NumMicroOps = 2;
   }
   def SwiftWriteP2P01FourCyle : SchedWriteRes<[SwiftUnitP2, SwiftUnitP01]> {
     let Latency = 4;
def : InstRW<[SwiftWriteP0FourCycle],
                    "VPMIN")>;
   def : InstRW<[SwiftWriteP0SixCycle], (instregex "VADDD$", "VSUBD$")>;
   def : InstRW<[SwiftWriteP1EightCycle], (instregex "VRECPS", "VRSQRTS")>;
 
   // 4.2.35 Advanced SIMD and VFP, Multiply
   def : InstRW<[SwiftWriteP1FourCycle],
         (instregex "VMUL(S|v|p|f|s)", "VNMULS", "VQDMULH", "VQRDMULH",
                    "VMULL", "VQDMULL")>;
-  def : InstRW<[SwiftWriteP1SixCycle],
-        (instregex "VMULD", "VNMULD")>;
   def : InstRW<[SwiftWriteP1FourCycle],
         (instregex "VMLA", "VMLS", "VNMLA", "VNMLS", "VFMA(S|D)", "VFMS(S|D)",
         "VFNMA", "VFNMS", "VMLAL", "VMLSL","VQDMLAL", "VQDMLSL")>;
   def : InstRW<[SwiftWriteP1EightCycle], (instregex "VFMAfd", "VFMSfd")>;
   def : InstRW<[SwiftWriteP1TwelveCyc], (instregex "VFMAfq", "VFMSfq")>;
 
   // 4.2.36 Advanced SIMD and VFP, Convert
   def : InstRW<[SwiftWriteP1FourCycle], (instregex "VCVT", "V(S|U)IT", "VTO(S|U)")>;
   // Fixpoint conversions.
-  def : WriteRes<WriteCvtFP, [SwiftUnitP1]> { let Latency = 4; }
+  //def : WriteRes<WriteCvtFP, [SwiftUnitP1]> { let Latency = 4; }
 
   // 4.2.37 Advanced SIMD and VFP, Move
   def : InstRW<[SwiftWriteP0TwoCycle],
         (instregex "VMOVv", "VMOV(S|D)$", "VMOV(S|D)cc",
                    "VMVNv", "VMVN(d|q)", "VMVN(S|D)cc",
                    "FCONST(D|S)")>;
   def : InstRW<[SwiftWriteP1TwoCycle], (instregex "VMOVN", "VMOVL")>;
   def : InstRW<[WriteSequence<[SwiftWriteP0FourCycle, SwiftWriteP1TwoCycle]>],
let SchedModel = SwiftModel in {
   def SwiftDiv32 : SchedWriteRes<[SwiftUnitP0, SwiftUnitDiv]> {
     let NumMicroOps = 1;
     let Latency = 32;
     let ResourceCycles = [1, 30];
   }
   def : InstRW<[SwiftDiv17], (instregex "VDIVS", "VSQRTS")>;
   def : InstRW<[SwiftDiv32], (instregex "VDIVD", "VSQRTD")>;
 
+  // ===---------------------------------------------------------------------===//
+  // Floating-point. Map target defined SchedReadWrite to processor specific ones
+  //
+  def : SchedAlias<WriteFPCVT, SwiftWriteP1FourCycle>;
+  def : SchedAlias<WriteFPMOV, SwiftWriteP2ThreeCycle>;
+
+  def : SchedAlias<WriteFPALU32, SwiftWriteP0FourCycle>;
+  def : SchedAlias<WriteFPALU64, SwiftWriteP0SixCycle>;
+
+  def : SchedAlias<WriteFPMUL32, SwiftWriteP1FourCycle>;
+  def : SchedAlias<WriteFPMUL64, SwiftWriteP1SixCycle>;
+
+  def : SchedAlias<WriteFPMAC32, SwiftWriteP1FourCycle>;
+  def : SchedAlias<WriteFPMAC64, SwiftWriteP1FourCycle>;
+
+  def : SchedAlias<WriteFPDIV32, SwiftDiv17>;
+  def : SchedAlias<WriteFPSQRT32, SwiftDiv17>;
+
+  def : SchedAlias<WriteFPDIV64, SwiftDiv32>;
+  def : SchedAlias<WriteFPSQRT64, SwiftDiv32>;
+
+  def : ReadAdvance<ReadFPMUL, 0>;
+  def : ReadAdvance<ReadFPMAC, 0>;
+
   // Not specified.
   def : InstRW<[SwiftWriteP01OneCycle2x], (instregex "ABS")>;
   // Preload.
   def : WriteRes<WritePreLd, [SwiftUnitP2]> { let Latency = 0;
     let ResourceCycles = [0];
   }
 
 }

test/CodeGen/ARM/misched-fp-basic.ll

+; REQUIRES: asserts
+; RUN: llc < %s -mtriple=arm-eabi -mcpu=cortex-a9 -enable-misched -verify-misched -debug-only=misched -o - 2>&1 > \
+; RUN:   /dev/null | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK_A9
+; RUN: llc < %s -mtriple=arm-eabi -mcpu=swift -enable-misched -verify-misched -debug-only=misched -o - 2>&1 > \
+; RUN:   /dev/null | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK_SWIFT
+; RUN: llc < %s -mtriple=arm-eabi -mcpu=cortex-r52 -enable-misched -verify-misched -debug-only=misched -o - 2>&1 > \
+; RUN:   /dev/null | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK_R52
+;
+; Check the latency of instructions for processors with sched-models
+;
+; Function Attrs: norecurse nounwind readnone
+define i32 @foo(float %a, float %b, float %c, i32 %d) local_unnamed_addr #0 {
+entry:
+;
+; CHECK:       ********** MI Scheduling **********
+; CHECK_A9:    VADDS
+; CHECK_SWIFT: VADDfd
+; CHECK_R52:   VADDS
+; CHECK_A9:    Latency    : 5
+; CHECK_SWIFT: Latency    : 4
+; CHECK_R52:   Latency    : 6
+;
+; CHECK_A9:    VMULS
+; CHECK_SWIFT: VMULfd
+; CHECK_R52:   VMULS
+; CHECK_SWIFT: Latency    : 4
+; CHECK_A9:    Latency    : 6
+; CHECK_R52:   Latency    : 6
+;
+; CHECK:       VDIVS
+; CHECK_SWIFT: Latency    : 17
+; CHECK_A9:    Latency    : 16
+; CHECK_R52:   Latency    : 7
+;
+; CHECK:       VCVTDS
+; CHECK_SWIFT: Latency    : 4
+; CHECK_A9:    Latency    : 5
+; CHECK_R52:   Latency    : 6
+;
+; CHECK:       VADDD
+; CHECK_SWIFT: Latency    : 6
+; CHECK_A9:    Latency    : 5
+; CHECK_R52:   Latency    : 6
+;
+; CHECK:       VMULD
+; CHECK_SWIFT: Latency    : 6
+; CHECK_A9:    Latency    : 7
+; CHECK_R52:   Latency    : 6
+;
+; CHECK:       VDIVD
+; CHECK_SWIFT: Latency    : 32
+; CHECK_A9:    Latency    : 26
+; CHECK_R52:   Latency    : 17
+;
+; CHECK:       VTOSIZD
+; CHECK_SWIFT: Latency    : 4
+; CHECK_A9:    Latency    : 5
+; CHECK_R52:   Latency    : 6
+;
+  %add = fadd float %a, %b
+  %mul = fmul float %add, %add
+  %div = fdiv float %mul, %b
+  %conv1 = fpext float %div to double
+  %add3 = fadd double %conv1, %conv1
+  %mul4 = fmul double %add3, %add3
+  %div5 = fdiv double %mul4, %conv1
+  %conv6 = fptosi double %div5 to i32
+  ret i32 %conv6
+}