[clang] [RISCV] Add sched model for XiangShan-NanHu (PR #70232)
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cfe-commits at lists.llvm.org
Wed Oct 25 10:30:39 PDT 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang-driver
Author: Yingwei Zheng (dtcxzyw)
<details>
<summary>Changes</summary>
[XiangShan](https://github.com/OpenXiangShan/XiangShan) is an open-source high-performance RISC-V processor.
This PR adds the schedule model for XiangShan-NanHu, the 2nd Gen core of the XiangShan processor series.
Overview: https://xiangshan-doc.readthedocs.io/zh-cn/latest/integration/overview/
It is based on the patch [D122556](https://reviews.llvm.org/D122556) by @<!-- -->SForeKeeper. The original patch hasn't been updated for a long time and it is out of sync with the current RTL design.
Now ICT-CAS is about to complete the tape-out of NanHu core according to @<!-- -->poemonsense. So I posted this PR to add support for it.
[Move elimination](https://github.com/dtcxzyw/llvm-project/commit/59f6e22bf12f67d799a7777f641853fec76c0aa8#diff-32270ea35a510b9a116a50cf5b922c46c194da7b0e0afe76576b8b2bef06556d) and macro fusions will be supported in subsequent PRs.
---
Patch is 70.52 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/70232.diff
14 Files Affected:
- (modified) clang/test/Driver/riscv-cpus.c (+14)
- (modified) clang/test/Misc/target-invalid-cpu-note.c (+2-2)
- (modified) llvm/lib/Target/RISCV/RISCV.td (+1)
- (modified) llvm/lib/Target/RISCV/RISCVInstrInfoD.td (+1-1)
- (modified) llvm/lib/Target/RISCV/RISCVInstrInfoF.td (+1-1)
- (modified) llvm/lib/Target/RISCV/RISCVProcessors.td (+21)
- (modified) llvm/lib/Target/RISCV/RISCVSchedRocket.td (+2)
- (modified) llvm/lib/Target/RISCV/RISCVSchedSiFive7.td (+2)
- (modified) llvm/lib/Target/RISCV/RISCVSchedSyntacoreSCR1.td (+2)
- (added) llvm/lib/Target/RISCV/RISCVSchedXiangShanNanHu.td (+307)
- (modified) llvm/lib/Target/RISCV/RISCVSchedule.td (+2)
- (added) llvm/test/tools/llvm-mca/RISCV/XiangShan/cascade-fma.s (+53)
- (added) llvm/test/tools/llvm-mca/RISCV/XiangShan/gpr-bypass.s (+527)
- (added) llvm/test/tools/llvm-mca/RISCV/XiangShan/load-to-alu.s (+73)
``````````diff
diff --git a/clang/test/Driver/riscv-cpus.c b/clang/test/Driver/riscv-cpus.c
index 3eaceedce685fc6..70f0a63336bd478 100644
--- a/clang/test/Driver/riscv-cpus.c
+++ b/clang/test/Driver/riscv-cpus.c
@@ -20,6 +20,17 @@
// MCPU-SYNTACORE-SCR1-MAX: "-target-feature" "+zicsr" "-target-feature" "+zifencei"
// MCPU-SYNTACORE-SCR1-MAX: "-target-abi" "ilp32"
+// RUN: %clang --target=riscv64 -### -c %s 2>&1 -mcpu=xiangshan-nanhu | FileCheck -check-prefix=MCPU-XIANGSHAN-NANHU %s
+// MCPU-XIANGSHAN-NANHU: "-nostdsysteminc" "-target-cpu" "xiangshan-nanhu"
+// MCPU-XIANGSHAN-NANHU: "-target-feature" "+m" "-target-feature" "+a" "-target-feature" "+f" "-target-feature" "+d"
+// MCPU-XIANGSHAN-NANHU: "-target-feature" "+c"
+// MCPU-XIANGSHAN-NANHU: "-target-feature" "+zicbom" "-target-feature" "+zicboz" "-target-feature" "+zicsr" "-target-feature" "+zifencei"
+// MCPU-XIANGSHAN-NANHU: "-target-feature" "+zba" "-target-feature" "+zbb" "-target-feature" "+zbc"
+// MCPU-XIANGSHAN-NANHU: "-target-feature" "+zbkb" "-target-feature" "+zbkc" "-target-feature" "+zbkx" "-target-feature" "+zbs"
+// MCPU-XIANGSHAN-NANHU: "-target-feature" "+zkn" "-target-feature" "+zknd" "-target-feature" "+zkne" "-target-feature" "+zknh"
+// MCPU-XIANGSHAN-NANHU: "-target-feature" "+zks" "-target-feature" "+zksed" "-target-feature" "+zksh" "-target-feature" "+svinval"
+// MCPU-XIANGSHAN-NANHU: "-target-abi" "lp64d"
+
// We cannot check much for -mcpu=native, but it should be replaced by a valid CPU string.
// RUN: %clang --target=riscv64 -### -c %s -mcpu=native 2> %t.err || true
// RUN: FileCheck --input-file=%t.err -check-prefix=MCPU-NATIVE %s
@@ -62,6 +73,9 @@
// RUN: %clang --target=riscv64 -### -c %s 2>&1 -mtune=veyron-v1 | FileCheck -check-prefix=MTUNE-VEYRON-V1 %s
// MTUNE-VEYRON-V1: "-tune-cpu" "veyron-v1"
+// RUN: %clang --target=riscv64 -### -c %s 2>&1 -mtune=xiangshan-nanhu | FileCheck -check-prefix=MTUNE-XIANGSHAN-NANHU %s
+// MTUNE-XIANGSHAN-NANHU: "-tune-cpu" "xiangshan-nanhu"
+
// Check mtune alias CPU has resolved to the right CPU according XLEN.
// RUN: %clang --target=riscv32 -### -c %s 2>&1 -mtune=generic | FileCheck -check-prefix=MTUNE-GENERIC-32 %s
// MTUNE-GENERIC-32: "-tune-cpu" "generic"
diff --git a/clang/test/Misc/target-invalid-cpu-note.c b/clang/test/Misc/target-invalid-cpu-note.c
index b2a04ebdbce628f..8e91eb4c62dd259 100644
--- a/clang/test/Misc/target-invalid-cpu-note.c
+++ b/clang/test/Misc/target-invalid-cpu-note.c
@@ -85,7 +85,7 @@
// RUN: not %clang_cc1 -triple riscv64 -target-cpu not-a-cpu -fsyntax-only %s 2>&1 | FileCheck %s --check-prefix RISCV64
// RISCV64: error: unknown target CPU 'not-a-cpu'
-// RISCV64-NEXT: note: valid target CPU values are: generic-rv64, rocket-rv64, sifive-s21, sifive-s51, sifive-s54, sifive-s76, sifive-u54, sifive-u74, sifive-x280, veyron-v1{{$}}
+// RISCV64-NEXT: note: valid target CPU values are: generic-rv64, rocket-rv64, sifive-s21, sifive-s51, sifive-s54, sifive-s76, sifive-u54, sifive-u74, sifive-x280, veyron-v1, xiangshan-nanhu{{$}}
// RUN: not %clang_cc1 -triple riscv32 -tune-cpu not-a-cpu -fsyntax-only %s 2>&1 | FileCheck %s --check-prefix TUNE-RISCV32
// TUNE-RISCV32: error: unknown target CPU 'not-a-cpu'
@@ -93,4 +93,4 @@
// RUN: not %clang_cc1 -triple riscv64 -tune-cpu not-a-cpu -fsyntax-only %s 2>&1 | FileCheck %s --check-prefix TUNE-RISCV64
// TUNE-RISCV64: error: unknown target CPU 'not-a-cpu'
-// TUNE-RISCV64-NEXT: note: valid target CPU values are: generic-rv64, rocket-rv64, sifive-s21, sifive-s51, sifive-s54, sifive-s76, sifive-u54, sifive-u74, sifive-x280, veyron-v1, generic, rocket, sifive-7-series{{$}}
+// TUNE-RISCV64-NEXT: note: valid target CPU values are: generic-rv64, rocket-rv64, sifive-s21, sifive-s51, sifive-s54, sifive-s76, sifive-u54, sifive-u74, sifive-x280, veyron-v1, xiangshan-nanhu, generic, rocket, sifive-7-series{{$}}
diff --git a/llvm/lib/Target/RISCV/RISCV.td b/llvm/lib/Target/RISCV/RISCV.td
index be93d5933d3329e..cb48ac4eeadd251 100644
--- a/llvm/lib/Target/RISCV/RISCV.td
+++ b/llvm/lib/Target/RISCV/RISCV.td
@@ -37,6 +37,7 @@ include "GISel/RISCVRegisterBanks.td"
include "RISCVSchedRocket.td"
include "RISCVSchedSiFive7.td"
include "RISCVSchedSyntacoreSCR1.td"
+include "RISCVSchedXiangShanNanHu.td"
//===----------------------------------------------------------------------===//
// RISC-V processors supported.
diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoD.td b/llvm/lib/Target/RISCV/RISCVInstrInfoD.td
index 59312f02aeceb77..34becfafe77473d 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoD.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoD.td
@@ -78,7 +78,7 @@ def FSD : FPStore_r<0b011, "fsd", FPR64, WriteFST64>;
} // Predicates = [HasStdExtD]
foreach Ext = DExts in {
- let SchedRW = [WriteFMA64, ReadFMA64, ReadFMA64, ReadFMA64] in {
+ let SchedRW = [WriteFMA64, ReadFMA64, ReadFMA64, ReadFMA64Addend] in {
defm FMADD_D : FPFMA_rrr_frm_m<OPC_MADD, 0b01, "fmadd.d", Ext>;
defm FMSUB_D : FPFMA_rrr_frm_m<OPC_MSUB, 0b01, "fmsub.d", Ext>;
defm FNMSUB_D : FPFMA_rrr_frm_m<OPC_NMSUB, 0b01, "fnmsub.d", Ext>;
diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoF.td b/llvm/lib/Target/RISCV/RISCVInstrInfoF.td
index 8726245f1602ebf..3a5794bb2d19474 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoF.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoF.td
@@ -302,7 +302,7 @@ def FSW : FPStore_r<0b010, "fsw", FPR32, WriteFST32>;
} // Predicates = [HasStdExtF]
foreach Ext = FExts in {
- let SchedRW = [WriteFMA32, ReadFMA32, ReadFMA32, ReadFMA32] in {
+ let SchedRW = [WriteFMA32, ReadFMA32, ReadFMA32, ReadFMA32Addend] in {
defm FMADD_S : FPFMA_rrr_frm_m<OPC_MADD, 0b00, "fmadd.s", Ext>;
defm FMSUB_S : FPFMA_rrr_frm_m<OPC_MSUB, 0b00, "fmsub.s", Ext>;
defm FNMSUB_S : FPFMA_rrr_frm_m<OPC_NMSUB, 0b00, "fnmsub.s", Ext>;
diff --git a/llvm/lib/Target/RISCV/RISCVProcessors.td b/llvm/lib/Target/RISCV/RISCVProcessors.td
index e4008d145ffa572..334e1f3f1d4521a 100644
--- a/llvm/lib/Target/RISCV/RISCVProcessors.td
+++ b/llvm/lib/Target/RISCV/RISCVProcessors.td
@@ -243,3 +243,24 @@ def VENTANA_VEYRON_V1 : RISCVProcessorModel<"veyron-v1",
FeatureStdExtZicbop,
FeatureStdExtZicboz,
FeatureVendorXVentanaCondOps]>;
+
+def XIANGSHAN_NANHU : RISCVProcessorModel<"xiangshan-nanhu",
+ XiangShanNanHuModel,
+ [Feature64Bit,
+ FeatureStdExtZicsr,
+ FeatureStdExtZifencei,
+ FeatureStdExtM,
+ FeatureStdExtA,
+ FeatureStdExtF,
+ FeatureStdExtD,
+ FeatureStdExtC,
+ FeatureStdExtZba,
+ FeatureStdExtZbb,
+ FeatureStdExtZbc,
+ FeatureStdExtZbs,
+ FeatureStdExtZkn,
+ FeatureStdExtZksed,
+ FeatureStdExtZksh,
+ FeatureStdExtSvinval,
+ FeatureStdExtZicbom,
+ FeatureStdExtZicboz]>;
diff --git a/llvm/lib/Target/RISCV/RISCVSchedRocket.td b/llvm/lib/Target/RISCV/RISCVSchedRocket.td
index 8fbc9afe267c562..bb9dfe5d0124098 100644
--- a/llvm/lib/Target/RISCV/RISCVSchedRocket.td
+++ b/llvm/lib/Target/RISCV/RISCVSchedRocket.td
@@ -206,7 +206,9 @@ def : ReadAdvance<ReadFAdd64, 0>;
def : ReadAdvance<ReadFMul32, 0>;
def : ReadAdvance<ReadFMul64, 0>;
def : ReadAdvance<ReadFMA32, 0>;
+def : ReadAdvance<ReadFMA32Addend, 0>;
def : ReadAdvance<ReadFMA64, 0>;
+def : ReadAdvance<ReadFMA64Addend, 0>;
def : ReadAdvance<ReadFDiv32, 0>;
def : ReadAdvance<ReadFDiv64, 0>;
def : ReadAdvance<ReadFSqrt32, 0>;
diff --git a/llvm/lib/Target/RISCV/RISCVSchedSiFive7.td b/llvm/lib/Target/RISCV/RISCVSchedSiFive7.td
index 96ebe8e3e67686a..822dc43d21f8392 100644
--- a/llvm/lib/Target/RISCV/RISCVSchedSiFive7.td
+++ b/llvm/lib/Target/RISCV/RISCVSchedSiFive7.td
@@ -936,7 +936,9 @@ def : ReadAdvance<ReadFMA16, 0>;
def : ReadAdvance<ReadFMul32, 0>;
def : ReadAdvance<ReadFMul64, 0>;
def : ReadAdvance<ReadFMA32, 0>;
+def : ReadAdvance<ReadFMA32Addend, 0>;
def : ReadAdvance<ReadFMA64, 0>;
+def : ReadAdvance<ReadFMA64Addend, 0>;
def : ReadAdvance<ReadFDiv16, 0>;
def : ReadAdvance<ReadFDiv32, 0>;
def : ReadAdvance<ReadFDiv64, 0>;
diff --git a/llvm/lib/Target/RISCV/RISCVSchedSyntacoreSCR1.td b/llvm/lib/Target/RISCV/RISCVSchedSyntacoreSCR1.td
index 960258c8bc7dfe8..06ad2075b073614 100644
--- a/llvm/lib/Target/RISCV/RISCVSchedSyntacoreSCR1.td
+++ b/llvm/lib/Target/RISCV/RISCVSchedSyntacoreSCR1.td
@@ -164,7 +164,9 @@ def : ReadAdvance<ReadFAdd64, 0>;
def : ReadAdvance<ReadFMul32, 0>;
def : ReadAdvance<ReadFMul64, 0>;
def : ReadAdvance<ReadFMA32, 0>;
+def : ReadAdvance<ReadFMA32Addend, 0>;
def : ReadAdvance<ReadFMA64, 0>;
+def : ReadAdvance<ReadFMA64Addend, 0>;
def : ReadAdvance<ReadFDiv32, 0>;
def : ReadAdvance<ReadFDiv64, 0>;
def : ReadAdvance<ReadFSqrt32, 0>;
diff --git a/llvm/lib/Target/RISCV/RISCVSchedXiangShanNanHu.td b/llvm/lib/Target/RISCV/RISCVSchedXiangShanNanHu.td
new file mode 100644
index 000000000000000..da21a311cdf7e00
--- /dev/null
+++ b/llvm/lib/Target/RISCV/RISCVSchedXiangShanNanHu.td
@@ -0,0 +1,307 @@
+//==- RISCVSchedXiangShanNanHu.td - XiangShan-NanHu Scheduling Definitions --*- tablegen -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===-------------------------------------------------------------------------------------===//
+
+//===-------------------------------------------------------------------------------------===//
+
+// XiangShan is a high-performance open-source RISC-V processor developed by
+// the Institute of Computing Technology (ICT) of the Chinese Academy of Sciences.
+// Source: https://github.com/OpenXiangShan/XiangShan
+// Documentation: https://github.com/OpenXiangShan/XiangShan-doc
+
+// XiangShan-NanHu is the second generation of XiangShan processor series.
+// Overview: https://xiangshan-doc.readthedocs.io/zh-cn/latest/integration/overview/
+
+def XiangShanNanHuModel : SchedMachineModel {
+ let MicroOpBufferSize = 256;
+ let LoopMicroOpBufferSize = 48; // Instruction queue size
+ let IssueWidth = 6; // 6-way decode and dispatch
+ let LoadLatency = 4;
+ let MispredictPenalty = 11; // Based on estimate of pipeline depth.
+ let CompleteModel = 0;
+ let PostRAScheduler = 1; // Enable Post RegAlloc Scheduler pass.
+ let UnsupportedFeatures = [];
+}
+
+let SchedModel = XiangShanNanHuModel in {
+
+// The reservation stations are distributed and grouped as 32-entry or 16-entry smaller ones.
+let BufferSize = 16 in {
+ def XS2ALU : ProcResource<4>;
+ def XS2MDU : ProcResource<2>;
+ def XS2MISC : ProcResource<1>;
+
+ def XS2FMAC : ProcResource<4>;
+ def XS2FMISC : ProcResource<2>;
+
+ // Load/Store queues are ignored.
+ def XS2LD : ProcResource<2>;
+ def XS2ST : ProcResource<2>;
+}
+
+// Branching
+def : WriteRes<WriteJmp, [XS2MISC]>;
+def : WriteRes<WriteJal, [XS2MISC]>;
+def : WriteRes<WriteJalr, [XS2MISC]>;
+
+// Integer arithmetic and logic
+let Latency = 1 in {
+def : WriteRes<WriteIALU, [XS2ALU]>;
+def : WriteRes<WriteIALU32, [XS2ALU]>;
+def : WriteRes<WriteShiftImm, [XS2ALU]>;
+def : WriteRes<WriteShiftImm32, [XS2ALU]>;
+def : WriteRes<WriteShiftReg, [XS2ALU]>;
+def : WriteRes<WriteShiftReg32, [XS2ALU]>;
+}
+
+// Integer multiplication
+let Latency = 3 in {
+def : WriteRes<WriteIMul, [XS2MDU]>;
+def : WriteRes<WriteIMul32, [XS2MDU]>;
+}
+
+// Integer division
+// SRT16 algorithm
+let Latency = 20, ReleaseAtCycles = [20] in {
+def : WriteRes<WriteIDiv32, [XS2MDU]>;
+def : WriteRes<WriteIDiv, [XS2MDU]>;
+}
+
+// Zb*
+let Latency = 1 in {
+// Zba
+def : WriteRes<WriteSHXADD, [XS2ALU]>;
+def : WriteRes<WriteSHXADD32, [XS2ALU]>;
+
+// Zbb
+def : WriteRes<WriteRotateImm, [XS2ALU]>;
+def : WriteRes<WriteRotateImm32, [XS2ALU]>;
+def : WriteRes<WriteRotateReg, [XS2ALU]>;
+def : WriteRes<WriteRotateReg32, [XS2ALU]>;
+def : WriteRes<WriteORCB, [XS2ALU]>;
+def : WriteRes<WriteREV8, [XS2ALU]>;
+
+// Zbkb
+def : WriteRes<WriteBREV8, [XS2ALU]>;
+def : WriteRes<WritePACK, [XS2ALU]>;
+def : WriteRes<WritePACK32, [XS2ALU]>;
+def : WriteRes<WriteZIP, [XS2ALU]>;
+}
+
+let Latency = 3 in {
+// Zbb
+def : WriteRes<WriteCLZ, [XS2MDU]>;
+def : WriteRes<WriteCLZ32, [XS2MDU]>;
+def : WriteRes<WriteCTZ, [XS2MDU]>;
+def : WriteRes<WriteCTZ32, [XS2MDU]>;
+def : WriteRes<WriteCPOP, [XS2MDU]>;
+def : WriteRes<WriteCPOP32, [XS2MDU]>;
+
+// Zbs
+def : WriteRes<WriteSingleBit, [XS2MDU]>;
+def : WriteRes<WriteSingleBitImm, [XS2MDU]>;
+def : WriteRes<WriteBEXT, [XS2MDU]>;
+def : WriteRes<WriteBEXTI, [XS2MDU]>;
+
+// Zbkc
+def : WriteRes<WriteCLMUL, [XS2MDU]>;
+
+// Zbkx
+def : WriteRes<WriteXPERM, [XS2MDU]>;
+}
+
+// Memory
+def : WriteRes<WriteSTB, [XS2ST]>;
+def : WriteRes<WriteSTH, [XS2ST]>;
+def : WriteRes<WriteSTW, [XS2ST]>;
+def : WriteRes<WriteSTD, [XS2ST]>;
+def : WriteRes<WriteFST32, [XS2ST]>;
+def : WriteRes<WriteFST64, [XS2ST]>;
+def : WriteRes<WriteAtomicSTW, [XS2ST]>;
+def : WriteRes<WriteAtomicSTD, [XS2ST]>;
+
+let Latency = 5 in {
+def : WriteRes<WriteLDB, [XS2LD]>;
+def : WriteRes<WriteLDH, [XS2LD]>;
+def : WriteRes<WriteLDW, [XS2LD]>;
+def : WriteRes<WriteLDD, [XS2LD]>;
+
+def : WriteRes<WriteAtomicW, [XS2LD]>;
+def : WriteRes<WriteAtomicD, [XS2LD]>;
+def : WriteRes<WriteAtomicLDW, [XS2LD]>;
+def : WriteRes<WriteAtomicLDD, [XS2LD]>;
+
+def : WriteRes<WriteFLD32, [XS2LD]>;
+def : WriteRes<WriteFLD64, [XS2LD]>;
+}
+
+// XiangShan-NanHu uses FuDian FPU instead of Berkeley HardFloat.
+// Documentation: https://github.com/OpenXiangShan/fudian
+
+let Latency = 3 in {
+def : WriteRes<WriteFAdd32, [XS2FMAC]>;
+def : WriteRes<WriteFSGNJ32, [XS2FMAC]>;
+def : WriteRes<WriteFMinMax32, [XS2FMAC]>;
+def : WriteRes<WriteFAdd64, [XS2FMAC]>;
+def : WriteRes<WriteFSGNJ64, [XS2FMAC]>;
+def : WriteRes<WriteFMinMax64, [XS2FMAC]>;
+
+def : WriteRes<WriteFCvtI32ToF32, [XS2FMAC]>;
+def : WriteRes<WriteFCvtI32ToF64, [XS2FMAC]>;
+def : WriteRes<WriteFCvtI64ToF32, [XS2FMAC]>;
+def : WriteRes<WriteFCvtI64ToF64, [XS2FMAC]>;
+def : WriteRes<WriteFCvtF32ToI32, [XS2FMAC]>;
+def : WriteRes<WriteFCvtF32ToI64, [XS2FMAC]>;
+def : WriteRes<WriteFCvtF64ToI32, [XS2FMAC]>;
+def : WriteRes<WriteFCvtF64ToI64, [XS2FMAC]>;
+def : WriteRes<WriteFCvtF32ToF64, [XS2FMAC]>;
+def : WriteRes<WriteFCvtF64ToF32, [XS2FMAC]>;
+
+def : WriteRes<WriteFClass32, [XS2FMAC]>;
+def : WriteRes<WriteFClass64, [XS2FMAC]>;
+def : WriteRes<WriteFCmp32, [XS2FMAC]>;
+def : WriteRes<WriteFCmp64, [XS2FMAC]>;
+def : WriteRes<WriteFMovF32ToI32, [XS2FMAC]>;
+def : WriteRes<WriteFMovI32ToF32, [XS2FMAC]>;
+def : WriteRes<WriteFMovF64ToI64, [XS2FMAC]>;
+def : WriteRes<WriteFMovI64ToF64, [XS2FMAC]>;
+}
+
+// FP multiplication
+let Latency = 3 in {
+def : WriteRes<WriteFMul32, [XS2FMAC]>;
+def : WriteRes<WriteFMul64, [XS2FMAC]>;
+}
+
+let Latency = 5 in {
+def : WriteRes<WriteFMA32, [XS2FMAC]>;
+def : WriteRes<WriteFMA64, [XS2FMAC]>;
+}
+
+// FP division
+def : WriteRes<WriteFDiv32, [XS2FMISC]> {
+ let Latency = 11;
+}
+def : WriteRes<WriteFDiv64, [XS2FMISC]> {
+ let Latency = 18;
+}
+
+def : WriteRes<WriteFSqrt32, [XS2FMISC]> {
+ let Latency = 17;
+}
+def : WriteRes<WriteFSqrt64, [XS2FMISC]> {
+ let Latency = 31;
+}
+
+// Others
+def : WriteRes<WriteCSR, [XS2MISC]>;
+def : WriteRes<WriteNop, []>;
+
+def : InstRW<[WriteIALU], (instrs COPY)>;
+
+// Bypass and advance
+
+class XS2LoadToALUBypass<SchedRead read>
+ : ReadAdvance<read, 1, [WriteLDB, WriteLDH, WriteLDW, WriteLDD, WriteAtomicW, WriteAtomicD, WriteAtomicLDW, WriteAtomicLDD]>;
+
+def : ReadAdvance<ReadJmp, 0>;
+def : ReadAdvance<ReadJalr, 0>;
+def : ReadAdvance<ReadCSR, 0>;
+def : ReadAdvance<ReadStoreData, 0>;
+def : ReadAdvance<ReadMemBase, 0>;
+def : XS2LoadToALUBypass<ReadIALU>;
+def : XS2LoadToALUBypass<ReadIALU32>;
+def : XS2LoadToALUBypass<ReadShiftImm>;
+def : XS2LoadToALUBypass<ReadShiftImm32>;
+def : XS2LoadToALUBypass<ReadShiftReg>;
+def : XS2LoadToALUBypass<ReadShiftReg32>;
+def : ReadAdvance<ReadIDiv, 0>;
+def : ReadAdvance<ReadIDiv32, 0>;
+def : ReadAdvance<ReadIMul, 0>;
+def : ReadAdvance<ReadIMul32, 0>;
+def : ReadAdvance<ReadAtomicWA, 0>;
+def : ReadAdvance<ReadAtomicWD, 0>;
+def : ReadAdvance<ReadAtomicDA, 0>;
+def : ReadAdvance<ReadAtomicDD, 0>;
+def : ReadAdvance<ReadAtomicLDW, 0>;
+def : ReadAdvance<ReadAtomicLDD, 0>;
+def : ReadAdvance<ReadAtomicSTW, 0>;
+def : ReadAdvance<ReadAtomicSTD, 0>;
+def : ReadAdvance<ReadFStoreData, 0>;
+def : ReadAdvance<ReadFMemBase, 0>;
+def : ReadAdvance<ReadFAdd32, 0>;
+def : ReadAdvance<ReadFAdd64, 0>;
+def : ReadAdvance<ReadFMul32, 0>;
+def : ReadAdvance<ReadFMul64, 0>;
+def : ReadAdvance<ReadFMA32, 0>;
+def : ReadAdvance<ReadFMA32Addend, 2>; // Cascade FMA
+def : ReadAdvance<ReadFMA64, 0>;
+def : ReadAdvance<ReadFMA64Addend, 2>; // Cascade FMA
+def : ReadAdvance<ReadFDiv32, 0>;
+def : ReadAdvance<ReadFDiv64, 0>;
+def : ReadAdvance<ReadFSqrt32, 0>;
+def : ReadAdvance<ReadFSqrt64, 0>;
+def : ReadAdvance<ReadFCmp32, 0>;
+def : ReadAdvance<ReadFCmp64, 0>;
+def : ReadAdvance<ReadFSGNJ32, 0>;
+def : ReadAdvance<ReadFSGNJ64, 0>;
+def : ReadAdvance<ReadFMinMax32, 0>;
+def : ReadAdvance<ReadFMinMax64, 0>;
+def : ReadAdvance<ReadFCvtF32ToI32, 0>;
+def : ReadAdvance<ReadFCvtF32ToI64, 0>;
+def : ReadAdvance<ReadFCvtF64ToI32, 0>;
+def : ReadAdvance<ReadFCvtF64ToI64, 0>;
+def : ReadAdvance<ReadFCvtI32ToF32, 0>;
+def : ReadAdvance<ReadFCvtI32ToF64, 0>;
+def : ReadAdvance<ReadFCvtI64ToF32, 0>;
+def : ReadAdvance<ReadFCvtI64ToF64, 0>;
+def : ReadAdvance<ReadFCvtF32ToF64, 0>;
+def : ReadAdvance<ReadFCvtF64ToF32, 0>;
+def : ReadAdvance<ReadFMovF32ToI32, 0>;
+def : ReadAdvance<ReadFMovI32ToF32, 0>;
+def : ReadAdvance<ReadFMovF64ToI64, 0>;
+def : ReadAdvance<ReadFMovI64ToF64, 0>;
+def : ReadAdvance<ReadFClass32, 0>;
+def : ReadAdvance<ReadFClass64, 0>;
+
+// Zb*
+// Zba
+def : XS2LoadToALUBypass<ReadSHXADD>;
+def : XS2LoadToALUBypass<ReadSHXADD32>;
+// Zbb
+def : XS2LoadToALUBypass<ReadRotateImm>;
+def : XS2LoadToALUBypass<ReadRotateImm32>;
+def : XS2LoadToALUBypass<ReadRotateReg>;
+def : XS2LoadToALUBypass<ReadRotateReg32>;
+def : ReadAdvance<ReadCLZ, 0>;
+def : ReadAdvance<ReadCLZ32, 0>;
+def : ReadAdvance<ReadCTZ, 0>;
+def : ReadAdvance<ReadCTZ32, 0>;
+def : ReadAdvance<ReadCPOP, 0>;
+def : ReadAdvance<ReadCPOP32, 0>;
+def : XS2LoadToALUBypass<ReadORCB>;
+def : XS2LoadToALUBypass<ReadREV8>;
+// Zbkc
+def : ReadAdvance<ReadCLMUL, 0>;
+// Zbs
+def : ReadAdvance<ReadSingleBit, 0>;
+def : ReadAdvance<ReadSingleBitImm, 0>;
+// Zbkb
+def : XS2LoadToALUBypass<ReadBREV8>;
+def : XS2LoadToALUBypass<ReadPACK>;
+def : XS2LoadToALUBypass<ReadPACK32>;
+def : XS2LoadToALUBypass<ReadZIP>;
+// Zbkx
+def : ReadAdvance<ReadXPERM, 0>;
+
+//===----------------------------------------------------------------------===//
+// Unsupported extensions
+defm : UnsupportedSchedV;
+defm : UnsupportedSchedZfa;
+defm : UnsupportedSchedZfh;
+defm : UnsupportedSchedSFB;
+}
diff --git a/llvm/lib/Target/RISCV/RISCVSchedule.td b/llvm/lib/Target/RISCV/RISCVSchedule.td
index af318ea5bf6851a..e42d07a4a4cd3f0 100644
--- a/llvm/lib/Target/RISCV/RISCVSchedule.td
+++ b/llvm/lib/Target/RISCV/RISCVSchedule.td
@@ -151,7 +151,9 @@ def ReadFMul32 : SchedRead; // 32-bit floating point multiply
def ReadFMul64 : SchedRead; // 64-bit floating point multiply
def ReadFMA16 : SchedRead; // 16-bit floating point fused multiply-add
def ReadFMA32 : SchedRead; // 32-bit floating point fused multiply-add
+def ReadFMA32Addend : SchedRead; // 32-bit floating point fused multiply-add
def ReadFMA64 : SchedRead; // 64-bit floating point fused multiply-add
+def ReadFMA64Addend : SchedRead; // 64-bit floating point fused multiply-add
def ReadFDiv16 : SchedRead; // 16-bit floating point d...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/70232
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