[X86][AVX512] Change VCVTSS2SD and VCVTSD2SS node types to keep consistency between VEX/EVEX versions.

[aymanmus]

Summary

AVX versions of the converts work on f32/f64 types, while AVX512 version work on vectors.

[craig.topper]

Any idea why the tests changed?

lib/Target/X86/X86InstrAVX512.td

6128

Should we have a VCVTSD2SSZrr_Int instruction like SSE/AVX?

[RKSimon]

test/CodeGen/X86/vector-half-conversions.ll

6

Please can you add -verify-machineinstrs to these to check that the the regclass changes are still being respected.

[aymanmus]

Add _Int versions for AVX512

[aymanmus]

@craig.topper I don't know exactly why the test changed.
But the diff is only with register names and slightly change in the instructions' order.

[craig.topper]

Please add the new _Int instructions to X86InstrInfo::hasUndefRegUpdate() and the load folding tables.

lib/Target/X86/X86InstrAVX512.td

6059

We probably don't need a non-intrinsic rounding mode instruction. Other than the intrinsic there's no way to create a node with the rounding mode

6078

We probably don't need a non-intrinsic rounding mode instruction. Other than the intrinsic there's no way to create a node with the rounding mode

6131–6133

Can this use VCVTSD2SSZrr_Int? Is there an equivalent pattern for AVX/SSE? What does it use?

6140–6142

Can this use VCVTSS2SDZrr_Int? Is there an equivalent pattern for AVX/SSE? What does it use?

[aymanmus]

Fix comments

[craig.topper]

LGTM

lib/Target/X86/X86InstrAVX512.td

AVX512_maskable_custom<O, F, Outs, Ins, MaskingIns, ZeroMaskingIns, OpcodeStr,
                          AttSrcAsm, IntelSrcAsm,
                          [(set _.RC:$dst, RHS)],
                          [(set _.RC:$dst, MaskingRHS)],
                          [(set _.RC:$dst,
                                (Select _.KRCWM:$mask, RHS, _.ImmAllZerosV))],
                          MaskingConstraint, NoItinerary, IsCommutable,
                          IsKCommutable>;
 
+// Similar to AVX512_maskable_common, but with scalar types.
+multiclass AVX512_maskable_fp_common<bits<8> O, Format F, X86VectorVTInfo _,
+                                  dag Outs,
+                                  dag Ins, dag MaskingIns, dag ZeroMaskingIns,
+                                  string OpcodeStr,
+                                  string AttSrcAsm, string IntelSrcAsm,
+                                  SDNode Select = vselect,
+                                  string MaskingConstraint = "",
+                                  InstrItinClass itin = NoItinerary,
+                                  bit IsCommutable = 0,
+                                  bit IsKCommutable = 0> :
+  AVX512_maskable_custom<O, F, Outs, Ins, MaskingIns, ZeroMaskingIns, OpcodeStr,
+                         AttSrcAsm, IntelSrcAsm,
+                         [], [], [],
+                         MaskingConstraint, NoItinerary, IsCommutable,
+                         IsKCommutable>;
+
 // This multiclass generates the unconditional/non-masking, the masking and
 // the zero-masking variant of the vector instruction.  In the masking case, the
 // perserved vector elements come from a new dummy input operand tied to $dst.
 multiclass AVX512_maskable<bits<8> O, Format F, X86VectorVTInfo _,
                            dag Outs, dag Ins, string OpcodeStr,
                            string AttSrcAsm, string IntelSrcAsm,
                            dag RHS,
                            InstrItinClass itin = NoItinerary,
multiclass AVX512_maskable_scalar<bits<8> O, Format F, X86VectorVTInfo _,
                            bit IsCommutable = 0> :
    AVX512_maskable_common<O, F, _, Outs, Ins,
                           !con((ins _.RC:$src0, _.KRCWM:$mask), Ins),
                           !con((ins _.KRCWM:$mask), Ins),
                           OpcodeStr, AttSrcAsm, IntelSrcAsm, RHS,
                           (X86selects _.KRCWM:$mask, RHS, _.RC:$src0),
                           X86selects, "$src0 = $dst", itin, IsCommutable>;
 
+// Similar to AVX512_maskable_scalar, but with scalar types.
+multiclass AVX512_maskable_fp_scalar<bits<8> O, Format F, X86VectorVTInfo _,
+                           dag Outs, dag Ins, string OpcodeStr,
+                           string AttSrcAsm, string IntelSrcAsm,
+                           InstrItinClass itin = NoItinerary,
+                           bit IsCommutable = 0> :
+   AVX512_maskable_fp_common<O, F, _, Outs, Ins,
+                          !con((ins _.FRC:$src0, _.KRCWM:$mask), Ins),
+                          !con((ins _.KRCWM:$mask), Ins),
+                          OpcodeStr, AttSrcAsm, IntelSrcAsm,
+                          X86selects, "$src0 = $dst", itin, IsCommutable>;
+
 // Similar to AVX512_maskable but in this case one of the source operands
 // ($src1) is already tied to $dst so we just use that for the preserved
 // vector elements.  NOTE that the NonTiedIns (the ins dag) should exclude
 // $src1.
 multiclass AVX512_maskable_3src<bits<8> O, Format F, X86VectorVTInfo _,
                                 dag Outs, dag NonTiedIns, string OpcodeStr,
                                 string AttSrcAsm, string IntelSrcAsm,
                                 dag RHS, bit IsCommutable = 0,
let Predicates = [HasAVX512] in {
   def : Pat<(i64 (int_x86_sse2_cvttsd2si64 sse_load_f64:$src)),
             (VCVTTSD2SI64Zrm_Int sdmem:$src)>;
 } // HasAVX512
 //===----------------------------------------------------------------------===//
 // AVX-512  Convert form float to double and back
 //===----------------------------------------------------------------------===//
 multiclass avx512_cvt_fp_scalar<bits<8> opc, string OpcodeStr, X86VectorVTInfo _,
                          X86VectorVTInfo _Src, SDNode OpNode> {
-  defm rr : AVX512_maskable_scalar<opc, MRMSrcReg, _, (outs _.RC:$dst),
+  let isCodeGenOnly = 1 in {
+  defm rr_Int : AVX512_maskable_scalar<opc, MRMSrcReg, _, (outs _.RC:$dst),
                          (ins _.RC:$src1, _Src.RC:$src2), OpcodeStr,
                          "$src2, $src1", "$src1, $src2",
                          (_.VT (OpNode (_.VT _.RC:$src1),
                                        (_Src.VT _Src.RC:$src2),
                                        (i32 FROUND_CURRENT)))>,
                          EVEX_4V, VEX_LIG, Sched<[WriteCvtF2F]>;
-  defm rm : AVX512_maskable_scalar<opc, MRMSrcMem, _, (outs _.RC:$dst),
-                         (ins _Src.RC:$src1, _Src.ScalarMemOp:$src2), OpcodeStr,
+  defm rm_Int : AVX512_maskable_scalar<opc, MRMSrcMem, _, (outs _.RC:$dst),
+                         (ins _.RC:$src1, _Src.ScalarMemOp:$src2), OpcodeStr,
                          "$src2, $src1", "$src1, $src2",
                          (_.VT (OpNode (_.VT _.RC:$src1),
                                   (_Src.VT (scalar_to_vector
                                             (_Src.ScalarLdFrag addr:$src2))),
                                   (i32 FROUND_CURRENT)))>,
                          EVEX_4V, VEX_LIG, Sched<[WriteCvtF2FLd, ReadAfterLd]>;
   }
 
+  defm rr : AVX512_maskable_fp_scalar<opc, MRMSrcReg, _, (outs _.FRC:$dst),
+                         (ins _.FRC:$src1, _Src.FRC:$src2), OpcodeStr,
+                         "$src2, $src1", "$src1, $src2">,
+                         EVEX_4V, VEX_LIG, Sched<[WriteCvtF2F]>;
+  let mayLoad = 1 in
+  defm rm : AVX512_maskable_fp_scalar<opc, MRMSrcMem, _, (outs _.FRC:$dst),
+                         (ins _.FRC:$src1, _Src.ScalarMemOp:$src2), OpcodeStr,
+                         "$src2, $src1", "$src1, $src2">,
+                         EVEX_4V, VEX_LIG, Sched<[WriteCvtF2FLd, ReadAfterLd]>;
+  
+}
+
 // Scalar Coversion with SAE - suppress all exceptions
 multiclass avx512_cvt_fp_sae_scalar<bits<8> opc, string OpcodeStr, X86VectorVTInfo _,
                          X86VectorVTInfo _Src, SDNode OpNodeRnd> {
-  defm rrb : AVX512_maskable_scalar<opc, MRMSrcReg, _, (outs _.RC:$dst),
+  let isCodeGenOnly = 1 in {
+  defm rrb_Int : AVX512_maskable_scalar<opc, MRMSrcReg, _, (outs _.RC:$dst),
                         (ins _.RC:$src1, _Src.RC:$src2), OpcodeStr,
                         "{sae}, $src2, $src1", "$src1, $src2, {sae}",
                         (_.VT (OpNodeRnd (_.VT _.RC:$src1),
                                          (_Src.VT _Src.RC:$src2),
                                          (i32 FROUND_NO_EXC)))>,
                         EVEX_4V, VEX_LIG, EVEX_B;
   }
 
+  defm rrb : AVX512_maskable_fp_scalar<opc, MRMSrcReg, _, (outs _.FRC:$dst),
+                        (ins _.FRC:$src1, _Src.FRC:$src2), OpcodeStr,
+                        "{sae}, $src2, $src1", "$src1, $src2, {sae}">,
+                        EVEX_4V, VEX_LIG, EVEX_B;
+}
+
 // Scalar Conversion with rounding control (RC)
 multiclass avx512_cvt_fp_rc_scalar<bits<8> opc, string OpcodeStr, X86VectorVTInfo _,
                          X86VectorVTInfo _Src, SDNode OpNodeRnd> {
-  defm rrb : AVX512_maskable_scalar<opc, MRMSrcReg, _, (outs _.RC:$dst),
+  let isCodeGenOnly = 1 in {
+  defm rrb_Int : AVX512_maskable_scalar<opc, MRMSrcReg, _, (outs _.RC:$dst),
                         (ins _.RC:$src1, _Src.RC:$src2, AVX512RC:$rc), OpcodeStr,
                         "$rc, $src2, $src1", "$src1, $src2, $rc",
                         (_.VT (OpNodeRnd (_.VT _.RC:$src1),
                                          (_Src.VT _Src.RC:$src2), (i32 imm:$rc)))>,
                         EVEX_4V, VEX_LIG, Sched<[WriteCvtF2FLd, ReadAfterLd]>,
                         EVEX_B, EVEX_RC;
   }
+
+  defm rrb : AVX512_maskable_fp_scalar<opc, MRMSrcReg, _, (outs _.FRC:$dst),
+                        (ins _.FRC:$src1, _Src.FRC:$src2, AVX512RC:$rc), OpcodeStr,
+                        "$rc, $src2, $src1", "$src1, $src2, $rc">,
+                        EVEX_4V, VEX_LIG, Sched<[WriteCvtF2FLd, ReadAfterLd]>,
+                        EVEX_B, EVEX_RC;
+}
 multiclass avx512_cvt_fp_scalar_sd2ss<bits<8> opc, string OpcodeStr,
                                   SDNode OpNodeRnd, X86VectorVTInfo _src,
                                                         X86VectorVTInfo _dst> {
   let Predicates = [HasAVX512] in {
     defm Z : avx512_cvt_fp_scalar<opc, OpcodeStr, _dst, _src, OpNodeRnd>,
              avx512_cvt_fp_rc_scalar<opc, OpcodeStr, _dst, _src,
                                OpNodeRnd>, VEX_W, EVEX_CD8<64, CD8VT1>, XD;
   }
multiclass avx512_cvt_fp_scalar_ss2sd<bits<8> opc, string OpcodeStr,
   }
 }
 defm VCVTSD2SS : avx512_cvt_fp_scalar_sd2ss<0x5A, "vcvtsd2ss",
                                          X86froundRnd, f64x_info, f32x_info>;
 defm VCVTSS2SD : avx512_cvt_fp_scalar_ss2sd<0x5A, "vcvtss2sd",
                                           X86fpextRnd,f32x_info, f64x_info >;
 
 def : Pat<(f64 (fpextend FR32X:$src)),
-          (COPY_TO_REGCLASS (VCVTSS2SDZrr (COPY_TO_REGCLASS FR32X:$src, VR128X),
-                               (COPY_TO_REGCLASS FR32X:$src, VR128X)), VR128X)>,
+          (VCVTSS2SDZrr (COPY_TO_REGCLASS FR32X:$src, FR64X), FR32X:$src)>,
           Requires<[HasAVX512]>;
 def : Pat<(f64 (fpextend (loadf32 addr:$src))),
-          (COPY_TO_REGCLASS (VCVTSS2SDZrm (v4f32 (IMPLICIT_DEF)), addr:$src), VR128X)>,
+          (VCVTSS2SDZrm (f64 (IMPLICIT_DEF)), addr:$src)>,
           Requires<[HasAVX512]>;
 
 def : Pat<(f64 (extloadf32 addr:$src)),
-      (COPY_TO_REGCLASS (VCVTSS2SDZrm (v4f32 (IMPLICIT_DEF)), addr:$src), VR128X)>,
+          (VCVTSS2SDZrm (f64 (IMPLICIT_DEF)), addr:$src)>,
       Requires<[HasAVX512, OptForSize]>;
 
 def : Pat<(f64 (extloadf32 addr:$src)),
-          (COPY_TO_REGCLASS (VCVTSS2SDZrr (v4f32 (IMPLICIT_DEF)),
-                    (COPY_TO_REGCLASS (VMOVSSZrm addr:$src), VR128X)), VR128X)>,
+          (VCVTSS2SDZrr (f64 (IMPLICIT_DEF)), (VMOVSSZrm addr:$src))>,
           Requires<[HasAVX512, OptForSpeed]>;
 
 def : Pat<(f32 (fpround FR64X:$src)),
-          (COPY_TO_REGCLASS (VCVTSD2SSZrr (COPY_TO_REGCLASS FR64X:$src, VR128X),
-                    (COPY_TO_REGCLASS FR64X:$src, VR128X)), VR128X)>,
+          (VCVTSD2SSZrr (COPY_TO_REGCLASS FR64X:$src, FR32X), FR64X:$src)>,
            Requires<[HasAVX512]>;
 
 def : Pat<(v4f32 (X86Movss
                    (v4f32 VR128X:$dst),
                    (v4f32 (scalar_to_vector
                      (f32 (fpround (f64 (extractelt VR128X:$src, (iPTR 0))))))))),
-          (VCVTSD2SSZrr VR128X:$dst, VR128X:$src)>,
+          (COPY_TO_REGCLASS (VCVTSD2SSZrr (COPY_TO_REGCLASS VR128X:$dst, FR32X), 
+                        (COPY_TO_REGCLASS VR128X:$src, FR64X)), 
+                      VR128X)>,
           Requires<[HasAVX512]>;
 
 def : Pat<(v2f64 (X86Movsd
                    (v2f64 VR128X:$dst),
                    (v2f64 (scalar_to_vector
                      (f64 (fpextend (f32 (extractelt VR128X:$src, (iPTR 0))))))))),
-          (VCVTSS2SDZrr VR128X:$dst, VR128X:$src)>,
+          (COPY_TO_REGCLASS (VCVTSS2SDZrr (COPY_TO_REGCLASS VR128X:$dst, FR64X), 
+                        (COPY_TO_REGCLASS VR128X:$src, FR32X)), 
+                      VR128X)>,
           Requires<[HasAVX512]>;
 
 //===----------------------------------------------------------------------===//
 // AVX-512  Vector convert from signed/unsigned integer to float/double
 //          and from float/double to signed/unsigned integer
 //===----------------------------------------------------------------------===//
 
 multiclass avx512_vcvt_fp<bits<8> opc, string OpcodeStr, X86VectorVTInfo _,

lib/Target/X86/X86InstrSSE.td

 def : InstAlias<"cvtsd2si{q}\t{$src, $dst|$dst, $src}",
                 (CVTSD2SI64rm GR64:$dst, sdmem:$src), 0>;
 
 /// SSE 2 Only
 
 // Convert scalar double to scalar single
 let hasSideEffects = 0, Predicates = [UseAVX] in {
 def VCVTSD2SSrr  : VSDI<0x5A, MRMSrcReg, (outs FR32:$dst),
-                       (ins FR64:$src1, FR64:$src2),
+                       (ins FR32:$src1, FR64:$src2),
                       "cvtsd2ss\t{$src2, $src1, $dst|$dst, $src1, $src2}", [],
                       IIC_SSE_CVT_Scalar_RR>, VEX_4V, VEX_LIG,
                       Sched<[WriteCvtF2F]>;
 let mayLoad = 1 in
 def VCVTSD2SSrm  : I<0x5A, MRMSrcMem, (outs FR32:$dst),
-                       (ins FR64:$src1, f64mem:$src2),
+                       (ins FR32:$src1, f64mem:$src2),
                       "vcvtsd2ss\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                       [], IIC_SSE_CVT_Scalar_RM>,
                       XD, Requires<[HasAVX, OptForSize]>, VEX_4V, VEX_LIG,
                       Sched<[WriteCvtF2FLd, ReadAfterLd]>;
 }
 
-def : Pat<(f32 (fpround FR64:$src)), (VCVTSD2SSrr FR64:$src, FR64:$src)>,
+def : Pat<(f32 (fpround FR64:$src)), 
+            (VCVTSD2SSrr (COPY_TO_REGCLASS FR64:$src, FR32), FR64:$src)>,
           Requires<[UseAVX]>;
 
 def CVTSD2SSrr  : SDI<0x5A, MRMSrcReg, (outs FR32:$dst), (ins FR64:$src),
                       "cvtsd2ss\t{$src, $dst|$dst, $src}",
                       [(set FR32:$dst, (fpround FR64:$src))],
                       IIC_SSE_CVT_Scalar_RR>, Sched<[WriteCvtF2F]>;
 def CVTSD2SSrm  : I<0x5A, MRMSrcMem, (outs FR32:$dst), (ins f64mem:$src),
                       "cvtsd2ss\t{$src, $dst|$dst, $src}",
def Int_CVTSD2SSrm: I<0x5A, MRMSrcMem,
                        Sched<[WriteCvtF2FLd, ReadAfterLd]>;
 }
 } // isCodeGenOnly = 1
 
 // Convert scalar single to scalar double
 // SSE2 instructions with XS prefix
 let hasSideEffects = 0, Predicates = [UseAVX] in {
 def VCVTSS2SDrr : I<0x5A, MRMSrcReg, (outs FR64:$dst),
-                    (ins FR32:$src1, FR32:$src2),
+                    (ins FR64:$src1, FR32:$src2),
                     "vcvtss2sd\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                     [], IIC_SSE_CVT_Scalar_RR>,
                     XS, Requires<[HasAVX]>, VEX_4V, VEX_LIG,
                     Sched<[WriteCvtF2F]>;
 let mayLoad = 1 in
 def VCVTSS2SDrm : I<0x5A, MRMSrcMem, (outs FR64:$dst),
-                    (ins FR32:$src1, f32mem:$src2),
+                    (ins FR64:$src1, f32mem:$src2),
                     "vcvtss2sd\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                     [], IIC_SSE_CVT_Scalar_RM>,
                     XS, VEX_4V, VEX_LIG, Requires<[HasAVX, OptForSize]>,
                     Sched<[WriteCvtF2FLd, ReadAfterLd]>;
 }
 
 def : Pat<(f64 (fpextend FR32:$src)),
-    (VCVTSS2SDrr FR32:$src, FR32:$src)>, Requires<[UseAVX]>;
+    (VCVTSS2SDrr (COPY_TO_REGCLASS FR32:$src, FR64), FR32:$src)>, Requires<[UseAVX]>;
 def : Pat<(fpextend (loadf32 addr:$src)),
-    (VCVTSS2SDrm (f32 (IMPLICIT_DEF)), addr:$src)>, Requires<[UseAVX]>;
+    (VCVTSS2SDrm (f64 (IMPLICIT_DEF)), addr:$src)>, Requires<[UseAVX]>;
 
 def : Pat<(extloadf32 addr:$src),
-    (VCVTSS2SDrm (f32 (IMPLICIT_DEF)), addr:$src)>,
+    (VCVTSS2SDrm (f64 (IMPLICIT_DEF)), addr:$src)>,
     Requires<[UseAVX, OptForSize]>;
 def : Pat<(extloadf32 addr:$src),
-    (VCVTSS2SDrr (f32 (IMPLICIT_DEF)), (VMOVSSrm addr:$src))>,
+    (VCVTSS2SDrr (f64 (IMPLICIT_DEF)), (VMOVSSrm addr:$src))>,
     Requires<[UseAVX, OptForSpeed]>;
 
 def CVTSS2SDrr : I<0x5A, MRMSrcReg, (outs FR64:$dst), (ins FR32:$src),
                    "cvtss2sd\t{$src, $dst|$dst, $src}",
                    [(set FR64:$dst, (fpextend FR32:$src))],
                    IIC_SSE_CVT_Scalar_RR>, XS,
                  Requires<[UseSSE2]>, Sched<[WriteCvtF2F]>;
 def CVTSS2SDrm : I<0x5A, MRMSrcMem, (outs FR64:$dst), (ins f32mem:$src),

test/CodeGen/X86/vector-half-conversions.ll

 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx,+f16c | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX1
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2,+f16c | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX2
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512f,-f16c | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX512 --check-prefix=AVX512F
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512f,+avx512vl | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX512 --check-prefix=AVX512VL
 
 ;
 ; Half to Float
 ;
 
 define float @cvt_i16_to_f32(i16 %a0) nounwind {
 ; AVX1-LABEL: cvt_i16_to_f32:
 ; AVX1:       # BB#0:
 ; AVX1-NEXT:    movswl %di, %eax
; AVX512VL-NEXT:    retq
   %3 = fpext <4 x half> %2 to <4 x double>
   ret <4 x double> %3
 }
 
 define <8 x double> @cvt_8i16_to_8f64(<8 x i16> %a0) nounwind {
 ; AVX1-LABEL: cvt_8i16_to_8f64:
 ; AVX1:       # BB#0:
 ; AVX1-NEXT:    vmovq %xmm0, %rdx
-; AVX1-NEXT:    movq %rdx, %r9
+; AVX1-NEXT:    movq %rdx, %r8
 ; AVX1-NEXT:    movl %edx, %r10d
-; AVX1-NEXT:    movswl %dx, %r8d
+; AVX1-NEXT:    movswl %dx, %r9d
 ; AVX1-NEXT:    shrq $48, %rdx
-; AVX1-NEXT:    shrq $32, %r9
+; AVX1-NEXT:    shrq $32, %r8
 ; AVX1-NEXT:    shrl $16, %r10d
 ; AVX1-NEXT:    vpextrq $1, %xmm0, %rdi
-; AVX1-NEXT:    movq %rdi, %rsi
-; AVX1-NEXT:    movl %edi, %eax
+; AVX1-NEXT:    movq %rdi, %rax
+; AVX1-NEXT:    movl %edi, %esi
 ; AVX1-NEXT:    movswl %di, %ecx
 ; AVX1-NEXT:    shrq $48, %rdi
-; AVX1-NEXT:    shrq $32, %rsi
-; AVX1-NEXT:    shrl $16, %eax
-; AVX1-NEXT:    cwtl
-; AVX1-NEXT:    vmovd %eax, %xmm0
+; AVX1-NEXT:    shrq $32, %rax
+; AVX1-NEXT:    shrl $16, %esi
+; AVX1-NEXT:    movswl %si, %esi
+; AVX1-NEXT:    vmovd %esi, %xmm0
 ; AVX1-NEXT:    vcvtph2ps %xmm0, %xmm1
 ; AVX1-NEXT:    vmovd %ecx, %xmm0
 ; AVX1-NEXT:    vcvtph2ps %xmm0, %xmm2
-; AVX1-NEXT:    movswl %si, %eax
+; AVX1-NEXT:    cwtl
 ; AVX1-NEXT:    vmovd %eax, %xmm0
 ; AVX1-NEXT:    vcvtph2ps %xmm0, %xmm3
 ; AVX1-NEXT:    movswl %di, %eax
 ; AVX1-NEXT:    vmovd %eax, %xmm0
 ; AVX1-NEXT:    vcvtph2ps %xmm0, %xmm4
 ; AVX1-NEXT:    movswl %r10w, %eax
 ; AVX1-NEXT:    vmovd %eax, %xmm0
 ; AVX1-NEXT:    vcvtph2ps %xmm0, %xmm0
-; AVX1-NEXT:    vmovd %r8d, %xmm5
+; AVX1-NEXT:    vmovd %r9d, %xmm5
 ; AVX1-NEXT:    vcvtph2ps %xmm5, %xmm5
-; AVX1-NEXT:    movswl %r9w, %eax
+; AVX1-NEXT:    movswl %r8w, %eax
 ; AVX1-NEXT:    vmovd %eax, %xmm6
 ; AVX1-NEXT:    vcvtph2ps %xmm6, %xmm6
 ; AVX1-NEXT:    movswl %dx, %eax
 ; AVX1-NEXT:    vmovd %eax, %xmm7
 ; AVX1-NEXT:    vcvtph2ps %xmm7, %xmm7
 ; AVX1-NEXT:    vcvtss2sd %xmm7, %xmm7, %xmm7
 ; AVX1-NEXT:    vcvtss2sd %xmm6, %xmm6, %xmm6
 ; AVX1-NEXT:    vunpcklpd {{.*#+}} xmm6 = xmm6[0],xmm7[0]
 ; AVX1-NEXT:    vcvtss2sd %xmm5, %xmm5, %xmm5
 ; AVX1-NEXT:    vcvtss2sd %xmm0, %xmm0, %xmm0
 ; AVX1-NEXT:    vunpcklpd {{.*#+}} xmm0 = xmm5[0],xmm0[0]
 ; AVX1-NEXT:    vinsertf128 $1, %xmm6, %ymm0, %ymm0
 ; AVX1-NEXT:    vcvtss2sd %xmm4, %xmm4, %xmm4
 ; AVX1-NEXT:    vcvtss2sd %xmm3, %xmm3, %xmm3
 ; AVX1-NEXT:    vunpcklpd {{.*#+}} xmm3 = xmm3[0],xmm4[0]
 ; AVX1-NEXT:    vcvtss2sd %xmm2, %xmm2, %xmm2
 ; AVX1-NEXT:    vcvtss2sd %xmm1, %xmm1, %xmm1
 ; AVX1-NEXT:    vunpcklpd {{.*#+}} xmm1 = xmm2[0],xmm1[0]
 ; AVX1-NEXT:    vinsertf128 $1, %xmm3, %ymm1, %ymm1
 ; AVX1-NEXT:    retq
 ;
 ; AVX2-LABEL: cvt_8i16_to_8f64:
 ; AVX2:       # BB#0:
 ; AVX2-NEXT:    vmovq %xmm0, %rdx
-; AVX2-NEXT:    movq %rdx, %r9
+; AVX2-NEXT:    movq %rdx, %r8
 ; AVX2-NEXT:    movl %edx, %r10d
-; AVX2-NEXT:    movswl %dx, %r8d
+; AVX2-NEXT:    movswl %dx, %r9d
 ; AVX2-NEXT:    shrq $48, %rdx
-; AVX2-NEXT:    shrq $32, %r9
+; AVX2-NEXT:    shrq $32, %r8
 ; AVX2-NEXT:    shrl $16, %r10d
 ; AVX2-NEXT:    vpextrq $1, %xmm0, %rdi
-; AVX2-NEXT:    movq %rdi, %rsi
-; AVX2-NEXT:    movl %edi, %eax
+; AVX2-NEXT:    movq %rdi, %rax
+; AVX2-NEXT:    movl %edi, %esi
 ; AVX2-NEXT:    movswl %di, %ecx
 ; AVX2-NEXT:    shrq $48, %rdi
-; AVX2-NEXT:    shrq $32, %rsi
-; AVX2-NEXT:    shrl $16, %eax
-; AVX2-NEXT:    cwtl
-; AVX2-NEXT:    vmovd %eax, %xmm0
+; AVX2-NEXT:    shrq $32, %rax
+; AVX2-NEXT:    shrl $16, %esi
+; AVX2-NEXT:    movswl %si, %esi
+; AVX2-NEXT:    vmovd %esi, %xmm0
 ; AVX2-NEXT:    vcvtph2ps %xmm0, %xmm1
 ; AVX2-NEXT:    vmovd %ecx, %xmm0
 ; AVX2-NEXT:    vcvtph2ps %xmm0, %xmm2
-; AVX2-NEXT:    movswl %si, %eax
+; AVX2-NEXT:    cwtl
 ; AVX2-NEXT:    vmovd %eax, %xmm0
 ; AVX2-NEXT:    vcvtph2ps %xmm0, %xmm3
 ; AVX2-NEXT:    movswl %di, %eax
 ; AVX2-NEXT:    vmovd %eax, %xmm0
 ; AVX2-NEXT:    vcvtph2ps %xmm0, %xmm4
 ; AVX2-NEXT:    movswl %r10w, %eax
 ; AVX2-NEXT:    vmovd %eax, %xmm0
 ; AVX2-NEXT:    vcvtph2ps %xmm0, %xmm0
-; AVX2-NEXT:    vmovd %r8d, %xmm5
+; AVX2-NEXT:    vmovd %r9d, %xmm5
 ; AVX2-NEXT:    vcvtph2ps %xmm5, %xmm5
-; AVX2-NEXT:    movswl %r9w, %eax
+; AVX2-NEXT:    movswl %r8w, %eax
 ; AVX2-NEXT:    vmovd %eax, %xmm6
 ; AVX2-NEXT:    vcvtph2ps %xmm6, %xmm6
 ; AVX2-NEXT:    movswl %dx, %eax
 ; AVX2-NEXT:    vmovd %eax, %xmm7
 ; AVX2-NEXT:    vcvtph2ps %xmm7, %xmm7
 ; AVX2-NEXT:    vcvtss2sd %xmm7, %xmm7, %xmm7
 ; AVX2-NEXT:    vcvtss2sd %xmm6, %xmm6, %xmm6
 ; AVX2-NEXT:    vunpcklpd {{.*#+}} xmm6 = xmm6[0],xmm7[0]