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[RISCV] Add support for scalable vector fneg using vfsgnjn.vv 

Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D95568
This commit is contained in:
Craig Topper 2021-01-28 08:47:25 -08:00
parent 081c1db02d
commit ae82a8c863
2 changed files with 163 additions and 0 deletions
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8
llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
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@ -514,6 +514,14 @@ defm "" : VPatBinaryFPSDNode_VV_VF<fmul, "PseudoVFMUL">;
defm "" : VPatBinaryFPSDNode_VV_VF<fdiv, "PseudoVFDIV">;
defm "" : VPatBinaryFPSDNode_R_VF<fdiv, "PseudoVFRDIV">;
// 14.10. Vector Floating-Point Sign-Injection Instructions
// Handle fneg with VFSGNJN using the same input for both operands.
foreach vti = AllFloatVectors in {
def : Pat<(fneg (vti.Vector vti.RegClass:$rs)),
(!cast<Instruction>("PseudoVFSGNJN_VV_"# vti.LMul.MX)
vti.RegClass:$rs, vti.RegClass:$rs, vti.AVL, vti.SEW)>;
}
// 14.11. Vector Floating-Point Compare Instructions
defm "" : VPatFPSetCCSDNode_VV_VF_FV<SETEQ, "PseudoVMFEQ", "PseudoVMFEQ">;
defm "" : VPatFPSetCCSDNode_VV_VF_FV<SETOEQ, "PseudoVMFEQ", "PseudoVMFEQ">;

155
llvm/test/CodeGen/RISCV/rvv/vfneg-sdnode.ll Normal file
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@ -0,0 +1,155 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -mattr=+d,+experimental-zfh,+experimental-v -target-abi=ilp32d \
; RUN: -verify-machineinstrs < %s | FileCheck %s
; RUN: llc -mtriple=riscv64 -mattr=+d,+experimental-zfh,+experimental-v -target-abi=ilp32d \
; RUN: -verify-machineinstrs < %s | FileCheck %s
define <vscale x 1 x half> @vfneg_vv_nxv1f16(<vscale x 1 x half> %va) {
; CHECK-LABEL: vfneg_vv_nxv1f16:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16,mf4,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 1 x half> %va
ret <vscale x 1 x half> %vb
}
define <vscale x 2 x half> @vfneg_vv_nxv2f16(<vscale x 2 x half> %va) {
; CHECK-LABEL: vfneg_vv_nxv2f16:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16,mf2,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 2 x half> %va
ret <vscale x 2 x half> %vb
}
define <vscale x 4 x half> @vfneg_vv_nxv4f16(<vscale x 4 x half> %va) {
; CHECK-LABEL: vfneg_vv_nxv4f16:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16,m1,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 4 x half> %va
ret <vscale x 4 x half> %vb
}
define <vscale x 8 x half> @vfneg_vv_nxv8f16(<vscale x 8 x half> %va) {
; CHECK-LABEL: vfneg_vv_nxv8f16:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16,m2,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 8 x half> %va
ret <vscale x 8 x half> %vb
}
define <vscale x 16 x half> @vfneg_vv_nxv16f16(<vscale x 16 x half> %va) {
; CHECK-LABEL: vfneg_vv_nxv16f16:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16,m4,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 16 x half> %va
ret <vscale x 16 x half> %vb
}
define <vscale x 32 x half> @vfneg_vv_nxv32f16(<vscale x 32 x half> %va) {
; CHECK-LABEL: vfneg_vv_nxv32f16:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16,m8,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 32 x half> %va
ret <vscale x 32 x half> %vb
}
define <vscale x 1 x float> @vfneg_vv_nxv1f32(<vscale x 1 x float> %va) {
; CHECK-LABEL: vfneg_vv_nxv1f32:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32,mf2,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 1 x float> %va
ret <vscale x 1 x float> %vb
}
define <vscale x 2 x float> @vfneg_vv_nxv2f32(<vscale x 2 x float> %va) {
; CHECK-LABEL: vfneg_vv_nxv2f32:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32,m1,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 2 x float> %va
ret <vscale x 2 x float> %vb
}
define <vscale x 4 x float> @vfneg_vv_nxv4f32(<vscale x 4 x float> %va) {
; CHECK-LABEL: vfneg_vv_nxv4f32:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32,m2,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 4 x float> %va
ret <vscale x 4 x float> %vb
}
define <vscale x 8 x float> @vfneg_vv_nxv8f32(<vscale x 8 x float> %va) {
; CHECK-LABEL: vfneg_vv_nxv8f32:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32,m4,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 8 x float> %va
ret <vscale x 8 x float> %vb
}
define <vscale x 16 x float> @vfneg_vv_nxv16f32(<vscale x 16 x float> %va) {
; CHECK-LABEL: vfneg_vv_nxv16f32:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32,m8,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 16 x float> %va
ret <vscale x 16 x float> %vb
}
define <vscale x 1 x double> @vfneg_vv_nxv1f64(<vscale x 1 x double> %va) {
; CHECK-LABEL: vfneg_vv_nxv1f64:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e64,m1,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 1 x double> %va
ret <vscale x 1 x double> %vb
}
define <vscale x 2 x double> @vfneg_vv_nxv2f64(<vscale x 2 x double> %va) {
; CHECK-LABEL: vfneg_vv_nxv2f64:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e64,m2,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 2 x double> %va
ret <vscale x 2 x double> %vb
}
define <vscale x 4 x double> @vfneg_vv_nxv4f64(<vscale x 4 x double> %va) {
; CHECK-LABEL: vfneg_vv_nxv4f64:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e64,m4,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 4 x double> %va
ret <vscale x 4 x double> %vb
}
define <vscale x 8 x double> @vfneg_vv_nxv8f64(<vscale x 8 x double> %va) {
; CHECK-LABEL: vfneg_vv_nxv8f64:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e64,m8,ta,mu
; CHECK-NEXT: vfsgnjn.vv v8, v8, v8
; CHECK-NEXT: ret
%vb = fneg <vscale x 8 x double> %va
ret <vscale x 8 x double> %vb
}