diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1057,6 +1057,9 @@
     setOperationAction(ISD::STRICT_FSUB,        MVT::v2f64, Legal);
     setOperationAction(ISD::STRICT_FMUL,        MVT::v2f64, Legal);
     setOperationAction(ISD::STRICT_FDIV,        MVT::v2f64, Legal);
+
+    if (Subtarget.hasGFNI())
+      setOperationAction(ISD::BITREVERSE,       MVT::v16i8, Custom);
   }
 
   if (!Subtarget.useSoftFloat() && Subtarget.hasSSSE3()) {
@@ -28972,23 +28975,33 @@
   if (Subtarget.hasXOP() && !VT.is512BitVector())
     return LowerBITREVERSE_XOP(Op, DAG);
 
-  assert(Subtarget.hasSSSE3() && "SSSE3 required for BITREVERSE");
-
   SDValue In = Op.getOperand(0);
   SDLoc DL(Op);
 
+  assert(VT.getScalarType() == MVT::i8 &&
+         "Only byte vector BITREVERSE supported");
+
   // Split v64i8 without BWI so that we can still use the PSHUFB lowering.
   if (VT == MVT::v64i8 && !Subtarget.hasBWI())
     return splitVectorIntUnary(Op, DAG);
 
-  unsigned NumElts = VT.getVectorNumElements();
-  assert(VT.getScalarType() == MVT::i8 &&
-         "Only byte vector BITREVERSE supported");
-
   // Decompose 256-bit ops into smaller 128-bit ops on pre-AVX2.
-  if (VT.is256BitVector() && !Subtarget.hasInt256())
+  if (VT == MVT::v32i8 && !Subtarget.hasInt256())
     return splitVectorIntUnary(Op, DAG);
 
+  unsigned NumElts = VT.getVectorNumElements();
+
+  // If we have GFNI, we can use GF2P8AFFINEQB to reverse the bits.
+  if (Subtarget.hasGFNI()) {
+    MVT MatrixVT = MVT::getVectorVT(MVT::i64, NumElts / 8);
+    SDValue Matrix = DAG.getConstant(0x8040201008040201ULL, DL, MatrixVT);
+    Matrix = DAG.getBitcast(VT, Matrix);
+    return DAG.getNode(X86ISD::GF2P8AFFINEQB, DL, VT, In, Matrix,
+                       DAG.getTargetConstant(0, DL, MVT::i8));
+  }
+
+  assert(Subtarget.hasSSSE3() && "SSSE3 required for BITREVERSE");
+
   // Perform BITREVERSE using PSHUFB lookups. Each byte is split into
   // two nibbles and a PSHUFB lookup to find the bitreverse of each
   // 0-15 value (moved to the other nibble).
diff --git a/llvm/test/CodeGen/X86/vector-bitreverse.ll b/llvm/test/CodeGen/X86/vector-bitreverse.ll
--- a/llvm/test/CodeGen/X86/vector-bitreverse.ll
+++ b/llvm/test/CodeGen/X86/vector-bitreverse.ll
@@ -7,6 +7,10 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512f,+avx512bw | FileCheck %s --check-prefix=ALL --check-prefix=AVX  --check-prefix=AVX512  --check-prefix=AVX512BW
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+xop,+avx | FileCheck %s --check-prefix=ALL --check-prefix=XOP --check-prefix=XOPAVX1
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+xop,+avx2 | FileCheck %s --check-prefix=ALL --check-prefix=XOP --check-prefix=XOPAVX2
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse2,+gfni | FileCheck %s --check-prefix=ALL --check-prefix=GFNISSE --check-prefix=GFNISSE2
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+ssse3,+gfni | FileCheck %s --check-prefix=ALL --check-prefix=GFNISSE --check-prefix=GFNISSSE3
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2,+gfni | FileCheck %s --check-prefix=ALL --check-prefix=GFNIAVX2
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512bw,+gfni | FileCheck %s --check-prefix=ALL --check-prefix=GFNIAVX512BW
 
 ; Make sure we don't crash with avx512bw and xop
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+xop,+avx512bw
@@ -57,6 +61,63 @@
 ; XOP-NEXT:    vmovd %xmm0, %eax
 ; XOP-NEXT:    # kill: def $al killed $al killed $eax
 ; XOP-NEXT:    retq
+;
+; GFNISSE-LABEL: test_bitreverse_i8:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNISSE-NEXT:    rolb $4, %dil
+; GFNISSE-NEXT:    movl %edi, %eax
+; GFNISSE-NEXT:    andb $51, %al
+; GFNISSE-NEXT:    shlb $2, %al
+; GFNISSE-NEXT:    andb $-52, %dil
+; GFNISSE-NEXT:    shrb $2, %dil
+; GFNISSE-NEXT:    orb %al, %dil
+; GFNISSE-NEXT:    movl %edi, %eax
+; GFNISSE-NEXT:    andb $85, %al
+; GFNISSE-NEXT:    addb %al, %al
+; GFNISSE-NEXT:    andb $-86, %dil
+; GFNISSE-NEXT:    shrb %dil
+; GFNISSE-NEXT:    addl %edi, %eax
+; GFNISSE-NEXT:    # kill: def $al killed $al killed $eax
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_i8:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNIAVX2-NEXT:    rolb $4, %dil
+; GFNIAVX2-NEXT:    movl %edi, %eax
+; GFNIAVX2-NEXT:    andb $51, %al
+; GFNIAVX2-NEXT:    shlb $2, %al
+; GFNIAVX2-NEXT:    andb $-52, %dil
+; GFNIAVX2-NEXT:    shrb $2, %dil
+; GFNIAVX2-NEXT:    orb %al, %dil
+; GFNIAVX2-NEXT:    movl %edi, %eax
+; GFNIAVX2-NEXT:    andb $85, %al
+; GFNIAVX2-NEXT:    addb %al, %al
+; GFNIAVX2-NEXT:    andb $-86, %dil
+; GFNIAVX2-NEXT:    shrb %dil
+; GFNIAVX2-NEXT:    addl %edi, %eax
+; GFNIAVX2-NEXT:    # kill: def $al killed $al killed $eax
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_i8:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNIAVX512BW-NEXT:    rolb $4, %dil
+; GFNIAVX512BW-NEXT:    movl %edi, %eax
+; GFNIAVX512BW-NEXT:    andb $51, %al
+; GFNIAVX512BW-NEXT:    shlb $2, %al
+; GFNIAVX512BW-NEXT:    andb $-52, %dil
+; GFNIAVX512BW-NEXT:    shrb $2, %dil
+; GFNIAVX512BW-NEXT:    orb %al, %dil
+; GFNIAVX512BW-NEXT:    movl %edi, %eax
+; GFNIAVX512BW-NEXT:    andb $85, %al
+; GFNIAVX512BW-NEXT:    addb %al, %al
+; GFNIAVX512BW-NEXT:    andb $-86, %dil
+; GFNIAVX512BW-NEXT:    shrb %dil
+; GFNIAVX512BW-NEXT:    addl %edi, %eax
+; GFNIAVX512BW-NEXT:    # kill: def $al killed $al killed $eax
+; GFNIAVX512BW-NEXT:    retq
   %b = call i8 @llvm.bitreverse.i8(i8 %a)
   ret i8 %b
 }
@@ -115,6 +176,75 @@
 ; XOP-NEXT:    vmovd %xmm0, %eax
 ; XOP-NEXT:    # kill: def $ax killed $ax killed $eax
 ; XOP-NEXT:    retq
+;
+; GFNISSE-LABEL: test_bitreverse_i16:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNISSE-NEXT:    rolw $8, %di
+; GFNISSE-NEXT:    movl %edi, %eax
+; GFNISSE-NEXT:    andl $3855, %eax # imm = 0xF0F
+; GFNISSE-NEXT:    shll $4, %eax
+; GFNISSE-NEXT:    andl $61680, %edi # imm = 0xF0F0
+; GFNISSE-NEXT:    shrl $4, %edi
+; GFNISSE-NEXT:    orl %eax, %edi
+; GFNISSE-NEXT:    movl %edi, %eax
+; GFNISSE-NEXT:    andl $13107, %eax # imm = 0x3333
+; GFNISSE-NEXT:    andl $52428, %edi # imm = 0xCCCC
+; GFNISSE-NEXT:    shrl $2, %edi
+; GFNISSE-NEXT:    leal (%rdi,%rax,4), %eax
+; GFNISSE-NEXT:    movl %eax, %ecx
+; GFNISSE-NEXT:    andl $21845, %ecx # imm = 0x5555
+; GFNISSE-NEXT:    andl $43690, %eax # imm = 0xAAAA
+; GFNISSE-NEXT:    shrl %eax
+; GFNISSE-NEXT:    leal (%rax,%rcx,2), %eax
+; GFNISSE-NEXT:    # kill: def $ax killed $ax killed $eax
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_i16:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNIAVX2-NEXT:    rolw $8, %di
+; GFNIAVX2-NEXT:    movl %edi, %eax
+; GFNIAVX2-NEXT:    andl $3855, %eax # imm = 0xF0F
+; GFNIAVX2-NEXT:    shll $4, %eax
+; GFNIAVX2-NEXT:    andl $61680, %edi # imm = 0xF0F0
+; GFNIAVX2-NEXT:    shrl $4, %edi
+; GFNIAVX2-NEXT:    orl %eax, %edi
+; GFNIAVX2-NEXT:    movl %edi, %eax
+; GFNIAVX2-NEXT:    andl $13107, %eax # imm = 0x3333
+; GFNIAVX2-NEXT:    andl $52428, %edi # imm = 0xCCCC
+; GFNIAVX2-NEXT:    shrl $2, %edi
+; GFNIAVX2-NEXT:    leal (%rdi,%rax,4), %eax
+; GFNIAVX2-NEXT:    movl %eax, %ecx
+; GFNIAVX2-NEXT:    andl $21845, %ecx # imm = 0x5555
+; GFNIAVX2-NEXT:    andl $43690, %eax # imm = 0xAAAA
+; GFNIAVX2-NEXT:    shrl %eax
+; GFNIAVX2-NEXT:    leal (%rax,%rcx,2), %eax
+; GFNIAVX2-NEXT:    # kill: def $ax killed $ax killed $eax
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_i16:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNIAVX512BW-NEXT:    rolw $8, %di
+; GFNIAVX512BW-NEXT:    movl %edi, %eax
+; GFNIAVX512BW-NEXT:    andl $3855, %eax # imm = 0xF0F
+; GFNIAVX512BW-NEXT:    shll $4, %eax
+; GFNIAVX512BW-NEXT:    andl $61680, %edi # imm = 0xF0F0
+; GFNIAVX512BW-NEXT:    shrl $4, %edi
+; GFNIAVX512BW-NEXT:    orl %eax, %edi
+; GFNIAVX512BW-NEXT:    movl %edi, %eax
+; GFNIAVX512BW-NEXT:    andl $13107, %eax # imm = 0x3333
+; GFNIAVX512BW-NEXT:    andl $52428, %edi # imm = 0xCCCC
+; GFNIAVX512BW-NEXT:    shrl $2, %edi
+; GFNIAVX512BW-NEXT:    leal (%rdi,%rax,4), %eax
+; GFNIAVX512BW-NEXT:    movl %eax, %ecx
+; GFNIAVX512BW-NEXT:    andl $21845, %ecx # imm = 0x5555
+; GFNIAVX512BW-NEXT:    andl $43690, %eax # imm = 0xAAAA
+; GFNIAVX512BW-NEXT:    shrl %eax
+; GFNIAVX512BW-NEXT:    leal (%rax,%rcx,2), %eax
+; GFNIAVX512BW-NEXT:    # kill: def $ax killed $ax killed $eax
+; GFNIAVX512BW-NEXT:    retq
   %b = call i16 @llvm.bitreverse.i16(i16 %a)
   ret i16 %b
 }
@@ -170,6 +300,72 @@
 ; XOP-NEXT:    vpperm {{.*}}(%rip), %xmm0, %xmm0, %xmm0
 ; XOP-NEXT:    vmovd %xmm0, %eax
 ; XOP-NEXT:    retq
+;
+; GFNISSE-LABEL: test_bitreverse_i32:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNISSE-NEXT:    bswapl %edi
+; GFNISSE-NEXT:    movl %edi, %eax
+; GFNISSE-NEXT:    andl $252645135, %eax # imm = 0xF0F0F0F
+; GFNISSE-NEXT:    shll $4, %eax
+; GFNISSE-NEXT:    andl $-252645136, %edi # imm = 0xF0F0F0F0
+; GFNISSE-NEXT:    shrl $4, %edi
+; GFNISSE-NEXT:    orl %eax, %edi
+; GFNISSE-NEXT:    movl %edi, %eax
+; GFNISSE-NEXT:    andl $858993459, %eax # imm = 0x33333333
+; GFNISSE-NEXT:    andl $-858993460, %edi # imm = 0xCCCCCCCC
+; GFNISSE-NEXT:    shrl $2, %edi
+; GFNISSE-NEXT:    leal (%rdi,%rax,4), %eax
+; GFNISSE-NEXT:    movl %eax, %ecx
+; GFNISSE-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
+; GFNISSE-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
+; GFNISSE-NEXT:    shrl %eax
+; GFNISSE-NEXT:    leal (%rax,%rcx,2), %eax
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_i32:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNIAVX2-NEXT:    bswapl %edi
+; GFNIAVX2-NEXT:    movl %edi, %eax
+; GFNIAVX2-NEXT:    andl $252645135, %eax # imm = 0xF0F0F0F
+; GFNIAVX2-NEXT:    shll $4, %eax
+; GFNIAVX2-NEXT:    andl $-252645136, %edi # imm = 0xF0F0F0F0
+; GFNIAVX2-NEXT:    shrl $4, %edi
+; GFNIAVX2-NEXT:    orl %eax, %edi
+; GFNIAVX2-NEXT:    movl %edi, %eax
+; GFNIAVX2-NEXT:    andl $858993459, %eax # imm = 0x33333333
+; GFNIAVX2-NEXT:    andl $-858993460, %edi # imm = 0xCCCCCCCC
+; GFNIAVX2-NEXT:    shrl $2, %edi
+; GFNIAVX2-NEXT:    leal (%rdi,%rax,4), %eax
+; GFNIAVX2-NEXT:    movl %eax, %ecx
+; GFNIAVX2-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
+; GFNIAVX2-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
+; GFNIAVX2-NEXT:    shrl %eax
+; GFNIAVX2-NEXT:    leal (%rax,%rcx,2), %eax
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_i32:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    # kill: def $edi killed $edi def $rdi
+; GFNIAVX512BW-NEXT:    bswapl %edi
+; GFNIAVX512BW-NEXT:    movl %edi, %eax
+; GFNIAVX512BW-NEXT:    andl $252645135, %eax # imm = 0xF0F0F0F
+; GFNIAVX512BW-NEXT:    shll $4, %eax
+; GFNIAVX512BW-NEXT:    andl $-252645136, %edi # imm = 0xF0F0F0F0
+; GFNIAVX512BW-NEXT:    shrl $4, %edi
+; GFNIAVX512BW-NEXT:    orl %eax, %edi
+; GFNIAVX512BW-NEXT:    movl %edi, %eax
+; GFNIAVX512BW-NEXT:    andl $858993459, %eax # imm = 0x33333333
+; GFNIAVX512BW-NEXT:    andl $-858993460, %edi # imm = 0xCCCCCCCC
+; GFNIAVX512BW-NEXT:    shrl $2, %edi
+; GFNIAVX512BW-NEXT:    leal (%rdi,%rax,4), %eax
+; GFNIAVX512BW-NEXT:    movl %eax, %ecx
+; GFNIAVX512BW-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
+; GFNIAVX512BW-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
+; GFNIAVX512BW-NEXT:    shrl %eax
+; GFNIAVX512BW-NEXT:    leal (%rax,%rcx,2), %eax
+; GFNIAVX512BW-NEXT:    retq
   %b = call i32 @llvm.bitreverse.i32(i32 %a)
   ret i32 %b
 }
@@ -229,6 +425,78 @@
 ; XOP-NEXT:    vpperm {{.*}}(%rip), %xmm0, %xmm0, %xmm0
 ; XOP-NEXT:    vmovq %xmm0, %rax
 ; XOP-NEXT:    retq
+;
+; GFNISSE-LABEL: test_bitreverse_i64:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    bswapq %rdi
+; GFNISSE-NEXT:    movabsq $1085102592571150095, %rax # imm = 0xF0F0F0F0F0F0F0F
+; GFNISSE-NEXT:    andq %rdi, %rax
+; GFNISSE-NEXT:    shlq $4, %rax
+; GFNISSE-NEXT:    movabsq $-1085102592571150096, %rcx # imm = 0xF0F0F0F0F0F0F0F0
+; GFNISSE-NEXT:    andq %rdi, %rcx
+; GFNISSE-NEXT:    shrq $4, %rcx
+; GFNISSE-NEXT:    orq %rax, %rcx
+; GFNISSE-NEXT:    movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
+; GFNISSE-NEXT:    andq %rcx, %rax
+; GFNISSE-NEXT:    movabsq $-3689348814741910324, %rdx # imm = 0xCCCCCCCCCCCCCCCC
+; GFNISSE-NEXT:    andq %rcx, %rdx
+; GFNISSE-NEXT:    shrq $2, %rdx
+; GFNISSE-NEXT:    leaq (%rdx,%rax,4), %rax
+; GFNISSE-NEXT:    movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
+; GFNISSE-NEXT:    andq %rax, %rcx
+; GFNISSE-NEXT:    movabsq $-6148914691236517206, %rdx # imm = 0xAAAAAAAAAAAAAAAA
+; GFNISSE-NEXT:    andq %rax, %rdx
+; GFNISSE-NEXT:    shrq %rdx
+; GFNISSE-NEXT:    leaq (%rdx,%rcx,2), %rax
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_i64:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    bswapq %rdi
+; GFNIAVX2-NEXT:    movabsq $1085102592571150095, %rax # imm = 0xF0F0F0F0F0F0F0F
+; GFNIAVX2-NEXT:    andq %rdi, %rax
+; GFNIAVX2-NEXT:    shlq $4, %rax
+; GFNIAVX2-NEXT:    movabsq $-1085102592571150096, %rcx # imm = 0xF0F0F0F0F0F0F0F0
+; GFNIAVX2-NEXT:    andq %rdi, %rcx
+; GFNIAVX2-NEXT:    shrq $4, %rcx
+; GFNIAVX2-NEXT:    orq %rax, %rcx
+; GFNIAVX2-NEXT:    movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
+; GFNIAVX2-NEXT:    andq %rcx, %rax
+; GFNIAVX2-NEXT:    movabsq $-3689348814741910324, %rdx # imm = 0xCCCCCCCCCCCCCCCC
+; GFNIAVX2-NEXT:    andq %rcx, %rdx
+; GFNIAVX2-NEXT:    shrq $2, %rdx
+; GFNIAVX2-NEXT:    leaq (%rdx,%rax,4), %rax
+; GFNIAVX2-NEXT:    movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
+; GFNIAVX2-NEXT:    andq %rax, %rcx
+; GFNIAVX2-NEXT:    movabsq $-6148914691236517206, %rdx # imm = 0xAAAAAAAAAAAAAAAA
+; GFNIAVX2-NEXT:    andq %rax, %rdx
+; GFNIAVX2-NEXT:    shrq %rdx
+; GFNIAVX2-NEXT:    leaq (%rdx,%rcx,2), %rax
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_i64:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    bswapq %rdi
+; GFNIAVX512BW-NEXT:    movabsq $1085102592571150095, %rax # imm = 0xF0F0F0F0F0F0F0F
+; GFNIAVX512BW-NEXT:    andq %rdi, %rax
+; GFNIAVX512BW-NEXT:    shlq $4, %rax
+; GFNIAVX512BW-NEXT:    movabsq $-1085102592571150096, %rcx # imm = 0xF0F0F0F0F0F0F0F0
+; GFNIAVX512BW-NEXT:    andq %rdi, %rcx
+; GFNIAVX512BW-NEXT:    shrq $4, %rcx
+; GFNIAVX512BW-NEXT:    orq %rax, %rcx
+; GFNIAVX512BW-NEXT:    movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
+; GFNIAVX512BW-NEXT:    andq %rcx, %rax
+; GFNIAVX512BW-NEXT:    movabsq $-3689348814741910324, %rdx # imm = 0xCCCCCCCCCCCCCCCC
+; GFNIAVX512BW-NEXT:    andq %rcx, %rdx
+; GFNIAVX512BW-NEXT:    shrq $2, %rdx
+; GFNIAVX512BW-NEXT:    leaq (%rdx,%rax,4), %rax
+; GFNIAVX512BW-NEXT:    movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
+; GFNIAVX512BW-NEXT:    andq %rax, %rcx
+; GFNIAVX512BW-NEXT:    movabsq $-6148914691236517206, %rdx # imm = 0xAAAAAAAAAAAAAAAA
+; GFNIAVX512BW-NEXT:    andq %rax, %rdx
+; GFNIAVX512BW-NEXT:    shrq %rdx
+; GFNIAVX512BW-NEXT:    leaq (%rdx,%rcx,2), %rax
+; GFNIAVX512BW-NEXT:    retq
   %b = call i64 @llvm.bitreverse.i64(i64 %a)
   ret i64 %b
 }
@@ -288,6 +556,21 @@
 ; XOP:       # %bb.0:
 ; XOP-NEXT:    vpperm {{.*}}(%rip), %xmm0, %xmm0, %xmm0
 ; XOP-NEXT:    retq
+;
+; GFNISSE-LABEL: test_bitreverse_v16i8:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    gf2p8affineqb $0, {{.*}}(%rip), %xmm0
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v16i8:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip), %xmm0, %xmm0
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v16i8:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip), %xmm0, %xmm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <16 x i8> @llvm.bitreverse.v16i8(<16 x i8> %a)
   ret <16 x i8> %b
 }
@@ -353,6 +636,33 @@
 ; XOP:       # %bb.0:
 ; XOP-NEXT:    vpperm {{.*}}(%rip), %xmm0, %xmm0, %xmm0
 ; XOP-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v8i16:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm1
+; GFNISSE2-NEXT:    psrlw $8, %xmm1
+; GFNISSE2-NEXT:    psllw $8, %xmm0
+; GFNISSE2-NEXT:    por %xmm1, %xmm0
+; GFNISSE2-NEXT:    gf2p8affineqb $0, {{.*}}(%rip), %xmm0
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v8i16:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, {{.*}}(%rip), %xmm0
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v8i16:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip), %xmm0, %xmm0
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v8i16:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip), %xmm0, %xmm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <8 x i16> @llvm.bitreverse.v8i16(<8 x i16> %a)
   ret <8 x i16> %b
 }
@@ -423,6 +733,38 @@
 ; XOP:       # %bb.0:
 ; XOP-NEXT:    vpperm {{.*}}(%rip), %xmm0, %xmm0, %xmm0
 ; XOP-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v4i32:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    pxor %xmm1, %xmm1
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm2
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm2 = xmm2[8],xmm1[8],xmm2[9],xmm1[9],xmm2[10],xmm1[10],xmm2[11],xmm1[11],xmm2[12],xmm1[12],xmm2[13],xmm1[13],xmm2[14],xmm1[14],xmm2[15],xmm1[15]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm2 = xmm2[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm2 = xmm2[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1],xmm0[2],xmm1[2],xmm0[3],xmm1[3],xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm2, %xmm0
+; GFNISSE2-NEXT:    gf2p8affineqb $0, {{.*}}(%rip), %xmm0
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v4i32:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, {{.*}}(%rip), %xmm0
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v4i32:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip), %xmm0, %xmm0
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v4i32:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip), %xmm0, %xmm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <4 x i32> @llvm.bitreverse.v4i32(<4 x i32> %a)
   ret <4 x i32> %b
 }
@@ -495,6 +837,40 @@
 ; XOP:       # %bb.0:
 ; XOP-NEXT:    vpperm {{.*}}(%rip), %xmm0, %xmm0, %xmm0
 ; XOP-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v2i64:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    pxor %xmm1, %xmm1
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm2
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm2 = xmm2[8],xmm1[8],xmm2[9],xmm1[9],xmm2[10],xmm1[10],xmm2[11],xmm1[11],xmm2[12],xmm1[12],xmm2[13],xmm1[13],xmm2[14],xmm1[14],xmm2[15],xmm1[15]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm2 = xmm2[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm2 = xmm2[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm2 = xmm2[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1],xmm0[2],xmm1[2],xmm0[3],xmm1[3],xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm2, %xmm0
+; GFNISSE2-NEXT:    gf2p8affineqb $0, {{.*}}(%rip), %xmm0
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v2i64:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, {{.*}}(%rip), %xmm0
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v2i64:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip), %xmm0, %xmm0
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v2i64:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip), %xmm0, %xmm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <2 x i64> @llvm.bitreverse.v2i64(<2 x i64> %a)
   ret <2 x i64> %b
 }
@@ -634,6 +1010,25 @@
 ; XOPAVX2-NEXT:    vpperm %xmm2, %xmm0, %xmm0, %xmm0
 ; XOPAVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
 ; XOPAVX2-NEXT:    retq
+;
+; GFNISSE-LABEL: test_bitreverse_v32i8:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    movdqa {{.*#+}} xmm2 = [9241421688590303745,9241421688590303745]
+; GFNISSE-NEXT:    gf2p8affineqb $0, %xmm2, %xmm0
+; GFNISSE-NEXT:    gf2p8affineqb $0, %xmm2, %xmm1
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v32i8:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vpbroadcastq {{.*#+}} ymm1 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm1, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v32i8:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpbroadcastq {{.*#+}} ymm1 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, %ymm1, %ymm0, %ymm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <32 x i8> @llvm.bitreverse.v32i8(<32 x i8> %a)
   ret <32 x i8> %b
 }
@@ -789,6 +1184,45 @@
 ; XOPAVX2-NEXT:    vpperm %xmm2, %xmm0, %xmm0, %xmm0
 ; XOPAVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
 ; XOPAVX2-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v16i16:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm2
+; GFNISSE2-NEXT:    psrlw $8, %xmm2
+; GFNISSE2-NEXT:    psllw $8, %xmm0
+; GFNISSE2-NEXT:    por %xmm2, %xmm0
+; GFNISSE2-NEXT:    movdqa {{.*#+}} xmm2 = [9241421688590303745,9241421688590303745]
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm2, %xmm0
+; GFNISSE2-NEXT:    movdqa %xmm1, %xmm3
+; GFNISSE2-NEXT:    psrlw $8, %xmm3
+; GFNISSE2-NEXT:    psllw $8, %xmm1
+; GFNISSE2-NEXT:    por %xmm3, %xmm1
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm2, %xmm1
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v16i16:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm2 = [1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14]
+; GFNISSSE3-NEXT:    pshufb %xmm2, %xmm0
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm3 = [9241421688590303745,9241421688590303745]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm3, %xmm0
+; GFNISSSE3-NEXT:    pshufb %xmm2, %xmm1
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm3, %xmm1
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v16i16:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vpshufb {{.*#+}} ymm0 = ymm0[1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14,17,16,19,18,21,20,23,22,25,24,27,26,29,28,31,30]
+; GFNIAVX2-NEXT:    vpbroadcastq {{.*#+}} ymm1 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm1, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v16i16:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} ymm0 = ymm0[1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14,17,16,19,18,21,20,23,22,25,24,27,26,29,28,31,30]
+; GFNIAVX512BW-NEXT:    vpbroadcastq {{.*#+}} ymm1 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, %ymm1, %ymm0, %ymm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <16 x i16> @llvm.bitreverse.v16i16(<16 x i16> %a)
   ret <16 x i16> %b
 }
@@ -953,6 +1387,54 @@
 ; XOPAVX2-NEXT:    vpperm %xmm2, %xmm0, %xmm0, %xmm0
 ; XOPAVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
 ; XOPAVX2-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v8i32:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    pxor %xmm2, %xmm2
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm3
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm3 = xmm3[8],xmm2[8],xmm3[9],xmm2[9],xmm3[10],xmm2[10],xmm3[11],xmm2[11],xmm3[12],xmm2[12],xmm3[13],xmm2[13],xmm3[14],xmm2[14],xmm3[15],xmm2[15]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm3 = xmm3[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm3 = xmm3[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1],xmm0[2],xmm2[2],xmm0[3],xmm2[3],xmm0[4],xmm2[4],xmm0[5],xmm2[5],xmm0[6],xmm2[6],xmm0[7],xmm2[7]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm3, %xmm0
+; GFNISSE2-NEXT:    movdqa {{.*#+}} xmm3 = [9241421688590303745,9241421688590303745]
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm3, %xmm0
+; GFNISSE2-NEXT:    movdqa %xmm1, %xmm4
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm4 = xmm4[8],xmm2[8],xmm4[9],xmm2[9],xmm4[10],xmm2[10],xmm4[11],xmm2[11],xmm4[12],xmm2[12],xmm4[13],xmm2[13],xmm4[14],xmm2[14],xmm4[15],xmm2[15]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm4 = xmm4[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm4 = xmm4[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm2[0],xmm1[1],xmm2[1],xmm1[2],xmm2[2],xmm1[3],xmm2[3],xmm1[4],xmm2[4],xmm1[5],xmm2[5],xmm1[6],xmm2[6],xmm1[7],xmm2[7]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm1 = xmm1[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm1 = xmm1[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm4, %xmm1
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm3, %xmm1
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v8i32:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm2 = [3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12]
+; GFNISSSE3-NEXT:    pshufb %xmm2, %xmm0
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm3 = [9241421688590303745,9241421688590303745]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm3, %xmm0
+; GFNISSSE3-NEXT:    pshufb %xmm2, %xmm1
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm3, %xmm1
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v8i32:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vpshufb {{.*#+}} ymm0 = ymm0[3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12,19,18,17,16,23,22,21,20,27,26,25,24,31,30,29,28]
+; GFNIAVX2-NEXT:    vpbroadcastq {{.*#+}} ymm1 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm1, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v8i32:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} ymm0 = ymm0[3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12,19,18,17,16,23,22,21,20,27,26,25,24,31,30,29,28]
+; GFNIAVX512BW-NEXT:    vpbroadcastq {{.*#+}} ymm1 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, %ymm1, %ymm0, %ymm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <8 x i32> @llvm.bitreverse.v8i32(<8 x i32> %a)
   ret <8 x i32> %b
 }
@@ -1121,6 +1603,58 @@
 ; XOPAVX2-NEXT:    vpperm %xmm2, %xmm0, %xmm0, %xmm0
 ; XOPAVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
 ; XOPAVX2-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v4i64:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    pxor %xmm2, %xmm2
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm3
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm3 = xmm3[8],xmm2[8],xmm3[9],xmm2[9],xmm3[10],xmm2[10],xmm3[11],xmm2[11],xmm3[12],xmm2[12],xmm3[13],xmm2[13],xmm3[14],xmm2[14],xmm3[15],xmm2[15]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm3 = xmm3[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm3 = xmm3[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm3 = xmm3[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1],xmm0[2],xmm2[2],xmm0[3],xmm2[3],xmm0[4],xmm2[4],xmm0[5],xmm2[5],xmm0[6],xmm2[6],xmm0[7],xmm2[7]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm3, %xmm0
+; GFNISSE2-NEXT:    movdqa {{.*#+}} xmm3 = [9241421688590303745,9241421688590303745]
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm3, %xmm0
+; GFNISSE2-NEXT:    movdqa %xmm1, %xmm4
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm4 = xmm4[8],xmm2[8],xmm4[9],xmm2[9],xmm4[10],xmm2[10],xmm4[11],xmm2[11],xmm4[12],xmm2[12],xmm4[13],xmm2[13],xmm4[14],xmm2[14],xmm4[15],xmm2[15]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm4 = xmm4[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm4 = xmm4[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm4 = xmm4[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm2[0],xmm1[1],xmm2[1],xmm1[2],xmm2[2],xmm1[3],xmm2[3],xmm1[4],xmm2[4],xmm1[5],xmm2[5],xmm1[6],xmm2[6],xmm1[7],xmm2[7]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm1 = xmm1[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm1 = xmm1[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm1 = xmm1[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm4, %xmm1
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm3, %xmm1
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v4i64:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm2 = [7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8]
+; GFNISSSE3-NEXT:    pshufb %xmm2, %xmm0
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm3 = [9241421688590303745,9241421688590303745]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm3, %xmm0
+; GFNISSSE3-NEXT:    pshufb %xmm2, %xmm1
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm3, %xmm1
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v4i64:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vpshufb {{.*#+}} ymm0 = ymm0[7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8,23,22,21,20,19,18,17,16,31,30,29,28,27,26,25,24]
+; GFNIAVX2-NEXT:    vpbroadcastq {{.*#+}} ymm1 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm1, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v4i64:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} ymm0 = ymm0[7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8,23,22,21,20,19,18,17,16,31,30,29,28,27,26,25,24]
+; GFNIAVX512BW-NEXT:    vpbroadcastq {{.*#+}} ymm1 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, %ymm1, %ymm0, %ymm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <4 x i64> @llvm.bitreverse.v4i64(<4 x i64> %a)
   ret <4 x i64> %b
 }
@@ -1366,6 +1900,27 @@
 ; XOPAVX2-NEXT:    vpperm %xmm3, %xmm1, %xmm0, %xmm1
 ; XOPAVX2-NEXT:    vinserti128 $1, %xmm2, %ymm1, %ymm1
 ; XOPAVX2-NEXT:    retq
+;
+; GFNISSE-LABEL: test_bitreverse_v64i8:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    movdqa {{.*#+}} xmm4 = [9241421688590303745,9241421688590303745]
+; GFNISSE-NEXT:    gf2p8affineqb $0, %xmm4, %xmm0
+; GFNISSE-NEXT:    gf2p8affineqb $0, %xmm4, %xmm1
+; GFNISSE-NEXT:    gf2p8affineqb $0, %xmm4, %xmm2
+; GFNISSE-NEXT:    gf2p8affineqb $0, %xmm4, %xmm3
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v64i8:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vpbroadcastq {{.*#+}} ymm2 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm2, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm2, %ymm1, %ymm1
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v64i8:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip){1to8}, %zmm0, %zmm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <64 x i8> @llvm.bitreverse.v64i8(<64 x i8> %a)
   ret <64 x i8> %b
 }
@@ -1645,6 +2200,61 @@
 ; XOPAVX2-NEXT:    vpperm %xmm3, %xmm1, %xmm0, %xmm1
 ; XOPAVX2-NEXT:    vinserti128 $1, %xmm2, %ymm1, %ymm1
 ; XOPAVX2-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v32i16:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm4
+; GFNISSE2-NEXT:    psrlw $8, %xmm4
+; GFNISSE2-NEXT:    psllw $8, %xmm0
+; GFNISSE2-NEXT:    por %xmm4, %xmm0
+; GFNISSE2-NEXT:    movdqa {{.*#+}} xmm4 = [9241421688590303745,9241421688590303745]
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm4, %xmm0
+; GFNISSE2-NEXT:    movdqa %xmm1, %xmm5
+; GFNISSE2-NEXT:    psrlw $8, %xmm5
+; GFNISSE2-NEXT:    psllw $8, %xmm1
+; GFNISSE2-NEXT:    por %xmm5, %xmm1
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm4, %xmm1
+; GFNISSE2-NEXT:    movdqa %xmm2, %xmm5
+; GFNISSE2-NEXT:    psrlw $8, %xmm5
+; GFNISSE2-NEXT:    psllw $8, %xmm2
+; GFNISSE2-NEXT:    por %xmm5, %xmm2
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm4, %xmm2
+; GFNISSE2-NEXT:    movdqa %xmm3, %xmm5
+; GFNISSE2-NEXT:    psrlw $8, %xmm5
+; GFNISSE2-NEXT:    psllw $8, %xmm3
+; GFNISSE2-NEXT:    por %xmm5, %xmm3
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm4, %xmm3
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v32i16:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm4 = [1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14]
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm0
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm5 = [9241421688590303745,9241421688590303745]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm0
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm1
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm1
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm2
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm2
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm3
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm3
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v32i16:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vmovdqa {{.*#+}} ymm2 = [1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14,1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14]
+; GFNIAVX2-NEXT:    vpshufb %ymm2, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    vpbroadcastq {{.*#+}} ymm3 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm3, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    vpshufb %ymm2, %ymm1, %ymm1
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm3, %ymm1, %ymm1
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v32i16:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} zmm0 = zmm0[1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14,17,16,19,18,21,20,23,22,25,24,27,26,29,28,31,30,33,32,35,34,37,36,39,38,41,40,43,42,45,44,47,46,49,48,51,50,53,52,55,54,57,56,59,58,61,60,63,62]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip){1to8}, %zmm0, %zmm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <32 x i16> @llvm.bitreverse.v32i16(<32 x i16> %a)
   ret <32 x i16> %b
 }
@@ -1941,6 +2551,78 @@
 ; XOPAVX2-NEXT:    vpperm %xmm3, %xmm1, %xmm0, %xmm1
 ; XOPAVX2-NEXT:    vinserti128 $1, %xmm2, %ymm1, %ymm1
 ; XOPAVX2-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v16i32:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    pxor %xmm4, %xmm4
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm5
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm5 = xmm5[8],xmm4[8],xmm5[9],xmm4[9],xmm5[10],xmm4[10],xmm5[11],xmm4[11],xmm5[12],xmm4[12],xmm5[13],xmm4[13],xmm5[14],xmm4[14],xmm5[15],xmm4[15]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm5 = xmm5[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm5 = xmm5[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm4[0],xmm0[1],xmm4[1],xmm0[2],xmm4[2],xmm0[3],xmm4[3],xmm0[4],xmm4[4],xmm0[5],xmm4[5],xmm0[6],xmm4[6],xmm0[7],xmm4[7]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm5, %xmm0
+; GFNISSE2-NEXT:    movdqa {{.*#+}} xmm5 = [9241421688590303745,9241421688590303745]
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm5, %xmm0
+; GFNISSE2-NEXT:    movdqa %xmm1, %xmm6
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm6 = xmm6[8],xmm4[8],xmm6[9],xmm4[9],xmm6[10],xmm4[10],xmm6[11],xmm4[11],xmm6[12],xmm4[12],xmm6[13],xmm4[13],xmm6[14],xmm4[14],xmm6[15],xmm4[15]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm6 = xmm6[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm6 = xmm6[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm4[0],xmm1[1],xmm4[1],xmm1[2],xmm4[2],xmm1[3],xmm4[3],xmm1[4],xmm4[4],xmm1[5],xmm4[5],xmm1[6],xmm4[6],xmm1[7],xmm4[7]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm1 = xmm1[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm1 = xmm1[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm6, %xmm1
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm5, %xmm1
+; GFNISSE2-NEXT:    movdqa %xmm2, %xmm6
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm6 = xmm6[8],xmm4[8],xmm6[9],xmm4[9],xmm6[10],xmm4[10],xmm6[11],xmm4[11],xmm6[12],xmm4[12],xmm6[13],xmm4[13],xmm6[14],xmm4[14],xmm6[15],xmm4[15]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm6 = xmm6[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm6 = xmm6[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm2 = xmm2[0],xmm4[0],xmm2[1],xmm4[1],xmm2[2],xmm4[2],xmm2[3],xmm4[3],xmm2[4],xmm4[4],xmm2[5],xmm4[5],xmm2[6],xmm4[6],xmm2[7],xmm4[7]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm2 = xmm2[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm2 = xmm2[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm6, %xmm2
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm5, %xmm2
+; GFNISSE2-NEXT:    movdqa %xmm3, %xmm6
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm6 = xmm6[8],xmm4[8],xmm6[9],xmm4[9],xmm6[10],xmm4[10],xmm6[11],xmm4[11],xmm6[12],xmm4[12],xmm6[13],xmm4[13],xmm6[14],xmm4[14],xmm6[15],xmm4[15]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm6 = xmm6[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm6 = xmm6[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm3 = xmm3[0],xmm4[0],xmm3[1],xmm4[1],xmm3[2],xmm4[2],xmm3[3],xmm4[3],xmm3[4],xmm4[4],xmm3[5],xmm4[5],xmm3[6],xmm4[6],xmm3[7],xmm4[7]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm3 = xmm3[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm3 = xmm3[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm6, %xmm3
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm5, %xmm3
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v16i32:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm4 = [3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12]
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm0
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm5 = [9241421688590303745,9241421688590303745]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm0
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm1
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm1
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm2
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm2
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm3
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm3
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v16i32:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vmovdqa {{.*#+}} ymm2 = [3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12,3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12]
+; GFNIAVX2-NEXT:    vpshufb %ymm2, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    vpbroadcastq {{.*#+}} ymm3 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm3, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    vpshufb %ymm2, %ymm1, %ymm1
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm3, %ymm1, %ymm1
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v16i32:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} zmm0 = zmm0[3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12,19,18,17,16,23,22,21,20,27,26,25,24,31,30,29,28,35,34,33,32,39,38,37,36,43,42,41,40,47,46,45,44,51,50,49,48,55,54,53,52,59,58,57,56,63,62,61,60]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip){1to8}, %zmm0, %zmm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <16 x i32> @llvm.bitreverse.v16i32(<16 x i32> %a)
   ret <16 x i32> %b
 }
@@ -2245,6 +2927,86 @@
 ; XOPAVX2-NEXT:    vpperm %xmm3, %xmm1, %xmm0, %xmm1
 ; XOPAVX2-NEXT:    vinserti128 $1, %xmm2, %ymm1, %ymm1
 ; XOPAVX2-NEXT:    retq
+;
+; GFNISSE2-LABEL: test_bitreverse_v8i64:
+; GFNISSE2:       # %bb.0:
+; GFNISSE2-NEXT:    pxor %xmm4, %xmm4
+; GFNISSE2-NEXT:    movdqa %xmm0, %xmm5
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm5 = xmm5[8],xmm4[8],xmm5[9],xmm4[9],xmm5[10],xmm4[10],xmm5[11],xmm4[11],xmm5[12],xmm4[12],xmm5[13],xmm4[13],xmm5[14],xmm4[14],xmm5[15],xmm4[15]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm5 = xmm5[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm5 = xmm5[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm5 = xmm5[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm4[0],xmm0[1],xmm4[1],xmm0[2],xmm4[2],xmm0[3],xmm4[3],xmm0[4],xmm4[4],xmm0[5],xmm4[5],xmm0[6],xmm4[6],xmm0[7],xmm4[7]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm5, %xmm0
+; GFNISSE2-NEXT:    movdqa {{.*#+}} xmm5 = [9241421688590303745,9241421688590303745]
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm5, %xmm0
+; GFNISSE2-NEXT:    movdqa %xmm1, %xmm6
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm6 = xmm6[8],xmm4[8],xmm6[9],xmm4[9],xmm6[10],xmm4[10],xmm6[11],xmm4[11],xmm6[12],xmm4[12],xmm6[13],xmm4[13],xmm6[14],xmm4[14],xmm6[15],xmm4[15]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm6 = xmm6[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm6 = xmm6[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm6 = xmm6[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm4[0],xmm1[1],xmm4[1],xmm1[2],xmm4[2],xmm1[3],xmm4[3],xmm1[4],xmm4[4],xmm1[5],xmm4[5],xmm1[6],xmm4[6],xmm1[7],xmm4[7]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm1 = xmm1[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm1 = xmm1[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm1 = xmm1[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm6, %xmm1
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm5, %xmm1
+; GFNISSE2-NEXT:    movdqa %xmm2, %xmm6
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm6 = xmm6[8],xmm4[8],xmm6[9],xmm4[9],xmm6[10],xmm4[10],xmm6[11],xmm4[11],xmm6[12],xmm4[12],xmm6[13],xmm4[13],xmm6[14],xmm4[14],xmm6[15],xmm4[15]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm6 = xmm6[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm6 = xmm6[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm6 = xmm6[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm2 = xmm2[0],xmm4[0],xmm2[1],xmm4[1],xmm2[2],xmm4[2],xmm2[3],xmm4[3],xmm2[4],xmm4[4],xmm2[5],xmm4[5],xmm2[6],xmm4[6],xmm2[7],xmm4[7]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm2 = xmm2[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm2 = xmm2[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm2 = xmm2[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm6, %xmm2
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm5, %xmm2
+; GFNISSE2-NEXT:    movdqa %xmm3, %xmm6
+; GFNISSE2-NEXT:    punpckhbw {{.*#+}} xmm6 = xmm6[8],xmm4[8],xmm6[9],xmm4[9],xmm6[10],xmm4[10],xmm6[11],xmm4[11],xmm6[12],xmm4[12],xmm6[13],xmm4[13],xmm6[14],xmm4[14],xmm6[15],xmm4[15]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm6 = xmm6[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm6 = xmm6[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm6 = xmm6[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    punpcklbw {{.*#+}} xmm3 = xmm3[0],xmm4[0],xmm3[1],xmm4[1],xmm3[2],xmm4[2],xmm3[3],xmm4[3],xmm3[4],xmm4[4],xmm3[5],xmm4[5],xmm3[6],xmm4[6],xmm3[7],xmm4[7]
+; GFNISSE2-NEXT:    pshufd {{.*#+}} xmm3 = xmm3[2,3,0,1]
+; GFNISSE2-NEXT:    pshuflw {{.*#+}} xmm3 = xmm3[3,2,1,0,4,5,6,7]
+; GFNISSE2-NEXT:    pshufhw {{.*#+}} xmm3 = xmm3[0,1,2,3,7,6,5,4]
+; GFNISSE2-NEXT:    packuswb %xmm6, %xmm3
+; GFNISSE2-NEXT:    gf2p8affineqb $0, %xmm5, %xmm3
+; GFNISSE2-NEXT:    retq
+;
+; GFNISSSE3-LABEL: test_bitreverse_v8i64:
+; GFNISSSE3:       # %bb.0:
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm4 = [7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8]
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm0
+; GFNISSSE3-NEXT:    movdqa {{.*#+}} xmm5 = [9241421688590303745,9241421688590303745]
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm0
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm1
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm1
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm2
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm2
+; GFNISSSE3-NEXT:    pshufb %xmm4, %xmm3
+; GFNISSSE3-NEXT:    gf2p8affineqb $0, %xmm5, %xmm3
+; GFNISSSE3-NEXT:    retq
+;
+; GFNIAVX2-LABEL: test_bitreverse_v8i64:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vmovdqa {{.*#+}} ymm2 = [7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8]
+; GFNIAVX2-NEXT:    vpshufb %ymm2, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    vpbroadcastq {{.*#+}} ymm3 = [9241421688590303745,9241421688590303745,9241421688590303745,9241421688590303745]
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm3, %ymm0, %ymm0
+; GFNIAVX2-NEXT:    vpshufb %ymm2, %ymm1, %ymm1
+; GFNIAVX2-NEXT:    vgf2p8affineqb $0, %ymm3, %ymm1, %ymm1
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: test_bitreverse_v8i64:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vpshufb {{.*#+}} zmm0 = zmm0[7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8,23,22,21,20,19,18,17,16,31,30,29,28,27,26,25,24,39,38,37,36,35,34,33,32,47,46,45,44,43,42,41,40,55,54,53,52,51,50,49,48,63,62,61,60,59,58,57,56]
+; GFNIAVX512BW-NEXT:    vgf2p8affineqb $0, {{.*}}(%rip){1to8}, %zmm0, %zmm0
+; GFNIAVX512BW-NEXT:    retq
   %b = call <8 x i64> @llvm.bitreverse.v8i64(<8 x i64> %a)
   ret <8 x i64> %b
 }
@@ -2277,6 +3039,21 @@
 ; XOP:       # %bb.0:
 ; XOP-NEXT:    vmovaps {{.*#+}} xmm0 = [0,255,64,191,32,223,96,159,16,239,80,175,48,207,112,143]
 ; XOP-NEXT:    retq
+;
+; GFNISSE-LABEL: fold_bitreverse_v16i8:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    movaps {{.*#+}} xmm0 = [0,255,64,191,32,223,96,159,16,239,80,175,48,207,112,143]
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: fold_bitreverse_v16i8:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vmovaps {{.*#+}} xmm0 = [0,255,64,191,32,223,96,159,16,239,80,175,48,207,112,143]
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: fold_bitreverse_v16i8:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vmovaps {{.*#+}} xmm0 = [0,255,64,191,32,223,96,159,16,239,80,175,48,207,112,143]
+; GFNIAVX512BW-NEXT:    retq
   %b = call <16 x i8> @llvm.bitreverse.v16i8(<16 x i8> <i8 0, i8 -1, i8 2, i8 -3, i8 4, i8 -5, i8 6, i8 -7, i8 8, i8 -9, i8 10, i8 -11, i8 12, i8 -13, i8 14, i8 -15>)
   ret <16 x i8> %b
 }
@@ -2297,6 +3074,22 @@
 ; XOP:       # %bb.0:
 ; XOP-NEXT:    vmovaps {{.*#+}} ymm0 = [0,65535,16384,49151,8192,57343,24576,40959,4096,61439,20480,45055,12288,53247,28672,36863]
 ; XOP-NEXT:    retq
+;
+; GFNISSE-LABEL: fold_bitreverse_v16i16:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    movaps {{.*#+}} xmm0 = [0,65535,16384,49151,8192,57343,24576,40959]
+; GFNISSE-NEXT:    movaps {{.*#+}} xmm1 = [4096,61439,20480,45055,12288,53247,28672,36863]
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: fold_bitreverse_v16i16:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vmovaps {{.*#+}} ymm0 = [0,65535,16384,49151,8192,57343,24576,40959,4096,61439,20480,45055,12288,53247,28672,36863]
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: fold_bitreverse_v16i16:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vmovaps {{.*#+}} ymm0 = [0,65535,16384,49151,8192,57343,24576,40959,4096,61439,20480,45055,12288,53247,28672,36863]
+; GFNIAVX512BW-NEXT:    retq
   %b = call <16 x i16> @llvm.bitreverse.v16i16(<16 x i16> <i16 0, i16 -1, i16 2, i16 -3, i16 4, i16 -5, i16 6, i16 -7, i16 8, i16 -9, i16 10, i16 -11, i16 12, i16 -13, i16 14, i16 -15>)
   ret <16 x i16> %b
 }
@@ -2332,6 +3125,25 @@
 ; XOP-NEXT:    vmovaps {{.*#+}} ymm0 = [0,4294967295,1073741824,3221225471,536870912,3758096383,1610612736,2684354559]
 ; XOP-NEXT:    vmovaps {{.*#+}} ymm1 = [268435456,4026531839,1342177280,2952790015,805306368,3489660927,1879048192,2415919103]
 ; XOP-NEXT:    retq
+;
+; GFNISSE-LABEL: fold_bitreverse_v16i32:
+; GFNISSE:       # %bb.0:
+; GFNISSE-NEXT:    movaps {{.*#+}} xmm0 = [0,4294967295,1073741824,3221225471]
+; GFNISSE-NEXT:    movaps {{.*#+}} xmm1 = [536870912,3758096383,1610612736,2684354559]
+; GFNISSE-NEXT:    movaps {{.*#+}} xmm2 = [268435456,4026531839,1342177280,2952790015]
+; GFNISSE-NEXT:    movaps {{.*#+}} xmm3 = [805306368,3489660927,1879048192,2415919103]
+; GFNISSE-NEXT:    retq
+;
+; GFNIAVX2-LABEL: fold_bitreverse_v16i32:
+; GFNIAVX2:       # %bb.0:
+; GFNIAVX2-NEXT:    vmovaps {{.*#+}} ymm0 = [0,4294967295,1073741824,3221225471,536870912,3758096383,1610612736,2684354559]
+; GFNIAVX2-NEXT:    vmovaps {{.*#+}} ymm1 = [268435456,4026531839,1342177280,2952790015,805306368,3489660927,1879048192,2415919103]
+; GFNIAVX2-NEXT:    retq
+;
+; GFNIAVX512BW-LABEL: fold_bitreverse_v16i32:
+; GFNIAVX512BW:       # %bb.0:
+; GFNIAVX512BW-NEXT:    vmovaps {{.*#+}} zmm0 = [0,4294967295,1073741824,3221225471,536870912,3758096383,1610612736,2684354559,268435456,4026531839,1342177280,2952790015,805306368,3489660927,1879048192,2415919103]
+; GFNIAVX512BW-NEXT:    retq
   %b = call <16 x i32> @llvm.bitreverse.v16i32(<16 x i32> <i32 0, i32 -1, i32 2, i32 -3, i32 4, i32 -5, i32 6, i32 -7, i32 8, i32 -9, i32 10, i32 -11, i32 12, i32 -13, i32 14, i32 -15>)
   ret <16 x i32> %b
 }