[llvm] [RISCV] Support codegen of vfmv.v.f for bfloat vector with both Zvfbfmin and Zfbfmin (PR #87318)
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Tue Apr 2 00:35:30 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-risc-v
Author: Jianjian Guan (jacquesguan)
<details>
<summary>Changes</summary>
vfmv, vfmerge should support bfloat vector when we have both Zvfbfmin and Zfbfmin, this patch tries to support vfmv first.
---
Full diff: https://github.com/llvm/llvm-project/pull/87318.diff
4 Files Affected:
- (modified) llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td (+5)
- (modified) llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td (+3-2)
- (modified) llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td (+5)
- (modified) llvm/test/CodeGen/RISCV/rvv/vfmv.v.f.ll (+122-2)
``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td b/llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
index 8cdaa7f2e5ea47..deebac115208cd 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
@@ -761,6 +761,11 @@ class GetVTypePredicates<VTypeInfo vti> {
true : [HasVInstructions]);
}
+class GetVTypeScalarPredicates<VTypeInfo vti> {
+ list<Predicate> Predicates = !cond(!eq(vti.Scalar, bf16) : [HasStdExtZfbfmin],
+ true : []);
+}
+
class VPseudoUSLoadNoMask<VReg RetClass,
int EEW> :
Pseudo<(outs RetClass:$rd),
diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td b/llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
index b4c6ba7e9723df..da761ae856706a 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
@@ -1454,8 +1454,9 @@ foreach fvtiToFWti = AllWidenableFloatVectors in {
// Vector Splats
//===----------------------------------------------------------------------===//
-foreach fvti = AllFloatVectors in {
- let Predicates = GetVTypePredicates<fvti>.Predicates in
+foreach fvti = !listconcat(AllFloatVectors, AllBFloatVectors) in {
+ let Predicates = !listconcat(GetVTypePredicates<fvti>.Predicates,
+ GetVTypeScalarPredicates<fvti>.Predicates) in
def : Pat<(fvti.Vector (riscv_vfmv_v_f_vl undef, fvti.ScalarRegClass:$rs1, srcvalue)),
(!cast<Instruction>("PseudoVFMV_V_"#fvti.ScalarSuffix#"_"#fvti.LMul.MX)
(fvti.Vector (IMPLICIT_DEF)),
diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td b/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
index cc44092700c66e..27db523584671b 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
@@ -2591,7 +2591,12 @@ foreach fvti = AllFloatVectors in {
fvti.RegClass:$merge, fvti.RegClass:$rs2,
(fvti.Scalar fvti.ScalarRegClass:$rs1),
(fvti.Mask V0), GPR:$vl, fvti.Log2SEW)>;
+ }
+}
+foreach fvti = !listconcat(AllFloatVectors, AllBFloatVectors) in {
+ let Predicates = !listconcat(GetVTypePredicates<fvti>.Predicates,
+ GetVTypeScalarPredicates<fvti>.Predicates) in {
// 13.16. Vector Floating-Point Move Instruction
// If we're splatting fpimm0, use vmv.v.x vd, x0.
def : Pat<(fvti.Vector (riscv_vfmv_v_f_vl
diff --git a/llvm/test/CodeGen/RISCV/rvv/vfmv.v.f.ll b/llvm/test/CodeGen/RISCV/rvv/vfmv.v.f.ll
index 237ef11d154bad..c00433eba54810 100644
--- a/llvm/test/CodeGen/RISCV/rvv/vfmv.v.f.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vfmv.v.f.ll
@@ -1,7 +1,7 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: sed 's/iXLen/i32/g' %s | llc -mtriple=riscv32 -mattr=+v,+zfh,+zvfh \
+; RUN: sed 's/iXLen/i32/g' %s | llc -mtriple=riscv32 -mattr=+v,+zfh,+zvfh,+experimental-zfbfmin,+experimental-zvfbfmin \
; RUN: -verify-machineinstrs -target-abi=ilp32d | FileCheck %s
-; RUN: sed 's/iXLen/i64/g' %s | llc -mtriple=riscv64 -mattr=+v,+zfh,+zvfh \
+; RUN: sed 's/iXLen/i64/g' %s | llc -mtriple=riscv64 -mattr=+v,+zfh,+zvfh,+experimental-zfbfmin,+experimental-zvfbfmin \
; RUN: -verify-machineinstrs -target-abi=lp64d | FileCheck %s
declare <vscale x 1 x half> @llvm.riscv.vfmv.v.f.nxv1f16(
@@ -528,3 +528,123 @@ entry:
ret <vscale x 8 x double> %a
}
+
+declare <vscale x 1 x bfloat> @llvm.riscv.vfmv.v.f.nxv1bf16(
+ <vscale x 1 x bfloat>,
+ bfloat,
+ iXLen);
+
+define <vscale x 1 x bfloat> @intrinsic_vfmv.v.f_f_nxv1bf16(bfloat %0, iXLen %1) nounwind {
+; CHECK-LABEL: intrinsic_vfmv.v.f_f_nxv1bf16:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: vsetvli zero, a0, e16, mf4, ta, ma
+; CHECK-NEXT: vfmv.v.f v8, fa0
+; CHECK-NEXT: ret
+entry:
+ %a = call <vscale x 1 x bfloat> @llvm.riscv.vfmv.v.f.nxv1bf16(
+ <vscale x 1 x bfloat> undef,
+ bfloat %0,
+ iXLen %1)
+
+ ret <vscale x 1 x bfloat> %a
+}
+
+declare <vscale x 2 x bfloat> @llvm.riscv.vfmv.v.f.nxv2bf16(
+ <vscale x 2 x bfloat>,
+ bfloat,
+ iXLen);
+
+define <vscale x 2 x bfloat> @intrinsic_vfmv.v.f_f_nxv2bf16(bfloat %0, iXLen %1) nounwind {
+; CHECK-LABEL: intrinsic_vfmv.v.f_f_nxv2bf16:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: vsetvli zero, a0, e16, mf2, ta, ma
+; CHECK-NEXT: vfmv.v.f v8, fa0
+; CHECK-NEXT: ret
+entry:
+ %a = call <vscale x 2 x bfloat> @llvm.riscv.vfmv.v.f.nxv2bf16(
+ <vscale x 2 x bfloat> undef,
+ bfloat %0,
+ iXLen %1)
+
+ ret <vscale x 2 x bfloat> %a
+}
+
+declare <vscale x 4 x bfloat> @llvm.riscv.vfmv.v.f.nxv4bf16(
+ <vscale x 4 x bfloat>,
+ bfloat,
+ iXLen);
+
+define <vscale x 4 x bfloat> @intrinsic_vfmv.v.f_f_nxv4bf16(bfloat %0, iXLen %1) nounwind {
+; CHECK-LABEL: intrinsic_vfmv.v.f_f_nxv4bf16:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: vsetvli zero, a0, e16, m1, ta, ma
+; CHECK-NEXT: vfmv.v.f v8, fa0
+; CHECK-NEXT: ret
+entry:
+ %a = call <vscale x 4 x bfloat> @llvm.riscv.vfmv.v.f.nxv4bf16(
+ <vscale x 4 x bfloat> undef,
+ bfloat %0,
+ iXLen %1)
+
+ ret <vscale x 4 x bfloat> %a
+}
+
+declare <vscale x 8 x bfloat> @llvm.riscv.vfmv.v.f.nxv8bf16(
+ <vscale x 8 x bfloat>,
+ bfloat,
+ iXLen);
+
+define <vscale x 8 x bfloat> @intrinsic_vfmv.v.f_f_nxv8bf16(bfloat %0, iXLen %1) nounwind {
+; CHECK-LABEL: intrinsic_vfmv.v.f_f_nxv8bf16:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: vsetvli zero, a0, e16, m2, ta, ma
+; CHECK-NEXT: vfmv.v.f v8, fa0
+; CHECK-NEXT: ret
+entry:
+ %a = call <vscale x 8 x bfloat> @llvm.riscv.vfmv.v.f.nxv8bf16(
+ <vscale x 8 x bfloat> undef,
+ bfloat %0,
+ iXLen %1)
+
+ ret <vscale x 8 x bfloat> %a
+}
+
+declare <vscale x 16 x bfloat> @llvm.riscv.vfmv.v.f.nxv16bf16(
+ <vscale x 16 x bfloat>,
+ bfloat,
+ iXLen);
+
+define <vscale x 16 x bfloat> @intrinsic_vfmv.v.f_f_nxv16bf16(bfloat %0, iXLen %1) nounwind {
+; CHECK-LABEL: intrinsic_vfmv.v.f_f_nxv16bf16:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: vsetvli zero, a0, e16, m4, ta, ma
+; CHECK-NEXT: vfmv.v.f v8, fa0
+; CHECK-NEXT: ret
+entry:
+ %a = call <vscale x 16 x bfloat> @llvm.riscv.vfmv.v.f.nxv16bf16(
+ <vscale x 16 x bfloat> undef,
+ bfloat %0,
+ iXLen %1)
+
+ ret <vscale x 16 x bfloat> %a
+}
+
+declare <vscale x 32 x bfloat> @llvm.riscv.vfmv.v.f.nxv32bf16(
+ <vscale x 32 x bfloat>,
+ bfloat,
+ iXLen);
+
+define <vscale x 32 x bfloat> @intrinsic_vfmv.v.f_f_nxv32bf16(bfloat %0, iXLen %1) nounwind {
+; CHECK-LABEL: intrinsic_vfmv.v.f_f_nxv32bf16:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: vsetvli zero, a0, e16, m8, ta, ma
+; CHECK-NEXT: vfmv.v.f v8, fa0
+; CHECK-NEXT: ret
+entry:
+ %a = call <vscale x 32 x bfloat> @llvm.riscv.vfmv.v.f.nxv32bf16(
+ <vscale x 32 x bfloat> undef,
+ bfloat %0,
+ iXLen %1)
+
+ ret <vscale x 32 x bfloat> %a
+}
``````````
</details>
https://github.com/llvm/llvm-project/pull/87318
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