[AArch64] Add support for NEON scalar fixed-point convert to floating-point instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193816 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/IR/IntrinsicsAArch64.td

@@ -260,4 +260,15 @@ def int_aarch64_neon_vsrid_n : Neon_2Arg_ShiftImm_Intrinsic;
 // Shift Left And Insert (Immediate)
 def int_aarch64_neon_vslid_n : Neon_2Arg_ShiftImm_Intrinsic;
 
+// Scalar Signed Fixed-point Convert To Floating-Point (Immediate)
+def int_aarch64_neon_vcvtf32_n_s32 :
+  Intrinsic<[llvm_v1f32_ty], [llvm_v1i32_ty, llvm_i32_ty], [IntrNoMem]>;
+def int_aarch64_neon_vcvtf64_n_s64 :
+  Intrinsic<[llvm_v1f64_ty], [llvm_v1i64_ty, llvm_i32_ty], [IntrNoMem]>;
+
+// Scalar Unsigned Fixed-point Convert To Floating-Point (Immediate)
+def int_aarch64_neon_vcvtf32_n_u32 :
+  Intrinsic<[llvm_v1f32_ty], [llvm_v1i32_ty, llvm_i32_ty], [IntrNoMem]>;
+def int_aarch64_neon_vcvtf64_n_u64 :
+  Intrinsic<[llvm_v1f64_ty], [llvm_v1i64_ty, llvm_i32_ty], [IntrNoMem]>;
 }

lib/Target/AArch64/AArch64InstrNEON.td

@@ -3607,6 +3607,19 @@ multiclass NeonI_ScalarShiftImm_narrow_HSD_size<bit u, bits<5> opcode,
   }
 }
 
+multiclass NeonI_ScalarShiftImm_scvtf_SD_size<bit u, bits<5> opcode, string asmop> {
+  def ssi : NeonI_ScalarShiftImm_size<u, opcode, asmop, FPR32, shr_imm32> {
+    bits<5> Imm;
+    let Inst{22-21} = 0b01; // immh:immb = 01xxxxx
+    let Inst{20-16} = Imm;
+  }
+  def ddi : NeonI_ScalarShiftImm_size<u, opcode, asmop, FPR64, shr_imm64> {
+    bits<6> Imm;
+    let Inst{22} = 0b1; // immh:immb = 1xxxxxx
+    let Inst{21-16} = Imm;
+  }
+}
+
 multiclass Neon_ScalarShiftImm_D_size_patterns<SDPatternOperator opnode,
                                                Instruction INSTD> {
   def ddi : Pat<(v1i64 (opnode (v1i64 FPR64:$Rn), (i32 imm:$Imm))),
@@ -3645,6 +3658,16 @@ multiclass Neon_ScalarShiftImm_narrow_HSD_size_patterns<
                 (INSTD FPR64:$Rn, imm:$Imm)>;
 }
 
+multiclass Neon_ScalarShiftImm_scvtf_SD_size_patterns<SDPatternOperator Sopnode,
+                                                      SDPatternOperator Dopnode,
+                                                      Instruction INSTS,
+                                                      Instruction INSTD> {
+  def ssi : Pat<(v1f32 (Sopnode (v1i32 FPR32:$Rn), (i32 imm:$Imm))),
+                (INSTS FPR32:$Rn, imm:$Imm)>;
+  def ddi : Pat<(v1f64 (Dopnode (v1i64 FPR64:$Rn), (i32 imm:$Imm))),
+                (INSTD FPR64:$Rn, imm:$Imm)>;
+}
+
 // Scalar Signed Shift Right (Immediate)
 defm SSHR : NeonI_ScalarShiftRightImm_D_size<0b0, 0b00000, "sshr">;
 defm : Neon_ScalarShiftImm_D_size_patterns<int_aarch64_neon_vshrds_n, SSHRddi>;
@@ -3743,6 +3766,18 @@ defm : Neon_ScalarShiftImm_narrow_HSD_size_patterns<int_aarch64_neon_vsqrshrun,
                                                     SQRSHRUNbhi, SQRSHRUNhsi,
                                                     SQRSHRUNsdi>;
 
+// Scalar Signed Fixed-point Convert To Floating-Point (Immediate)
+defm SCVTF_N : NeonI_ScalarShiftImm_scvtf_SD_size<0b0, 0b11100, "scvtf">;
+defm : Neon_ScalarShiftImm_scvtf_SD_size_patterns<int_aarch64_neon_vcvtf32_n_s32,
+                                                  int_aarch64_neon_vcvtf64_n_s64,
+                                                  SCVTF_Nssi, SCVTF_Nddi>;
+
+// Scalar Unsigned Fixed-point Convert To Floating-Point (Immediate)
+defm UCVTF_N : NeonI_ScalarShiftImm_scvtf_SD_size<0b1, 0b11100, "ucvtf">;
+defm : Neon_ScalarShiftImm_scvtf_SD_size_patterns<int_aarch64_neon_vcvtf32_n_u32,
+                                                  int_aarch64_neon_vcvtf64_n_u64,
+                                                  UCVTF_Nssi, UCVTF_Nddi>;
+
 // Scalar Integer Add
 let isCommutable = 1 in {
 def ADDddd : NeonI_Scalar3Same_D_size<0b0, 0b10000, "add">;

test/CodeGen/AArch64/neon-scalar-cvt.ll

@@ -47,3 +47,51 @@ entry:
 }
 
 declare <1 x double> @llvm.aarch64.neon.vcvtf64.u64(<1 x i64>)
+
+define float @test_vcvts_n_f32_s32(i32 %a) {
+; CHECK: test_vcvts_n_f32_s32
+; CHECK: scvtf {{s[0-9]+}}, {{s[0-9]+}}, #1
+entry:
+  %vcvtf = insertelement <1 x i32> undef, i32 %a, i32 0
+  %vcvtf1 = tail call <1 x float> @llvm.aarch64.neon.vcvtf32.n.s32(<1 x i32> %vcvtf, i32 1)
+  %0 = extractelement <1 x float> %vcvtf1, i32 0
+  ret float %0
+}
+
+declare <1 x float> @llvm.aarch64.neon.vcvtf32.n.s32(<1 x i32>, i32)
+
+define double @test_vcvtd_n_f64_s64(i64 %a) {
+; CHECK: test_vcvtd_n_f64_s64
+; CHECK: scvtf {{d[0-9]+}}, {{d[0-9]+}}, #1
+entry:
+  %vcvtf = insertelement <1 x i64> undef, i64 %a, i32 0
+  %vcvtf1 = tail call <1 x double> @llvm.aarch64.neon.vcvtf64.n.s64(<1 x i64> %vcvtf, i32 1)
+  %0 = extractelement <1 x double> %vcvtf1, i32 0
+  ret double %0
+}
+
+declare <1 x double> @llvm.aarch64.neon.vcvtf64.n.s64(<1 x i64>, i32)
+
+define float @test_vcvts_n_f32_u32(i32 %a) {
+; CHECK: test_vcvts_n_f32_u32
+; CHECK: ucvtf {{s[0-9]+}}, {{s[0-9]+}}, #1
+entry:
+  %vcvtf = insertelement <1 x i32> undef, i32 %a, i32 0
+  %vcvtf1 = tail call <1 x float> @llvm.aarch64.neon.vcvtf32.n.u32(<1 x i32> %vcvtf, i32 1)
+  %0 = extractelement <1 x float> %vcvtf1, i32 0
+  ret float %0
+}
+
+declare <1 x float> @llvm.aarch64.neon.vcvtf32.n.u32(<1 x i32>, i32)
+
+define double @test_vcvtd_n_f64_u64(i64 %a) {
+; CHECK: test_vcvtd_n_f64_u64
+; CHECK: ucvtf {{d[0-9]+}}, {{d[0-9]+}}, #1
+entry:
+  %vcvtf = insertelement <1 x i64> undef, i64 %a, i32 0
+  %vcvtf1 = tail call <1 x double> @llvm.aarch64.neon.vcvtf64.n.u64(<1 x i64> %vcvtf, i32 1)
+  %0 = extractelement <1 x double> %vcvtf1, i32 0
+  ret double %0
+}
+
+declare <1 x double> @llvm.aarch64.neon.vcvtf64.n.u64(<1 x i64>, i32)

test/MC/AArch64/neon-diagnostics.s

@@ -4992,3 +4992,43 @@
 // CHECK-ERROR: error: expected integer in range [1, 32]
 // CHECK-ERROR:        sqrshrun s22, d16, #99
 // CHECK-ERROR:                           ^
+
+//----------------------------------------------------------------------
+// Scalar Signed Fixed-point Convert To Floating-Point (Immediate)
+//----------------------------------------------------------------------
+
+    scvtf s22, s13, #0
+    scvtf s22, s13, #33
+    scvtf d21, d12, #65
+    scvtf d21, s12, #31
+        
+// CHECK-ERROR: error: expected integer in range [1, 32]
+// CHECK-ERROR:        scvtf s22, s13, #0
+// CHECK-ERROR:                        ^
+// CHECK-ERROR: error: expected integer in range [1, 32]
+// CHECK-ERROR:        scvtf s22, s13, #33
+// CHECK-ERROR:                        ^
+// CHECK-ERROR: error: expected integer in range [1, 64]
+// CHECK-ERROR:        scvtf d21, d12, #65
+// CHECK-ERROR:                        ^
+// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR:        scvtf d21, s12, #31
+// CHECK-ERROR:                   ^
+
+//----------------------------------------------------------------------
+// Scalar Unsigned Fixed-point Convert To Floating-Point (Immediate)
+//----------------------------------------------------------------------
+
+    ucvtf s22, s13, #34
+    ucvtf d21, d14, #65
+    ucvtf d21, s14, #64
+        
+// CHECK-ERROR: error: expected integer in range [1, 32]
+// CHECK-ERROR:        ucvtf s22, s13, #34
+// CHECK-ERROR:                        ^
+// CHECK-ERROR: error: expected integer in range [1, 64]
+// CHECK-ERROR:        ucvtf d21, d14, #65
+// CHECK-ERROR:                        ^
+// CHECK-ERROR: error: invalid operand for instruction
+// CHECK-ERROR:        ucvtf d21, s14, #64
+// CHECK-ERROR:                   ^

test/MC/AArch64/neon-scalar-cvt.s

@@ -21,3 +21,23 @@
 
 // CHECK: ucvtf s22, s13    // encoding: [0xb6,0xd9,0x21,0x7e]
 // CHECK: ucvtf d21, d14    // encoding: [0xd5,0xd9,0x61,0x7e]
+
+//----------------------------------------------------------------------
+// Scalar Signed Fixed-point Convert To Floating-Point (Immediate)
+//----------------------------------------------------------------------
+
+    scvtf s22, s13, #32
+    scvtf d21, d12, #64
+
+// CHECK: scvtf s22, s13, #32  // encoding: [0xb6,0xe5,0x20,0x5f]
+// CHECK: scvtf d21, d12, #64  // encoding: [0x95,0xe5,0x40,0x5f]    
+
+//----------------------------------------------------------------------
+// Scalar Unsigned Fixed-point Convert To Floating-Point (Immediate)
+//----------------------------------------------------------------------
+
+    ucvtf s22, s13, #32
+    ucvtf d21, d14, #64
+
+// CHECK: ucvtf s22, s13, #32  // encoding: [0xb6,0xe5,0x20,0x7f]
+// CHECK: ucvtf d21, d14, #64  // encoding: [0xd5,0xe5,0x40,0x7f]

test/MC/Disassembler/AArch64/neon-instructions.txt

@@ -1955,3 +1955,19 @@
 0x51,0x8d,0x0a,0x7f
 0xaa,0x8d,0x11,0x7f
 0x16,0x8e,0x21,0x7f
+
+#----------------------------------------------------------------------
+# Scalar Signed Fixed-point Convert To Floating-Point (Immediate)
+#----------------------------------------------------------------------
+# CHECK: scvtf s22, s13, #32
+# CHECK: scvtf d21, d12, #64
+0xb6,0xe5,0x20,0x5f
+0x95,0xe5,0x40,0x5f
+
+#----------------------------------------------------------------------
+# Scalar Unsigned Fixed-point Convert To Floating-Point (Immediate)
+#----------------------------------------------------------------------
+# CHECK: ucvtf s22, s13, #32
+# CHECK: ucvtf d21, d14, #64
+0xb6,0xe5,0x20,0x7f
+0xd5,0xe5,0x40,0x7f