some CRC comments update

Author: Xor-el

HashLib.Tests/src/CRCTests.pas

@@ -15,7 +15,6 @@ interface
   HlpICRC,
   HlpHashFactory,
   HlpIHash,
-  HlpSimd,
   HlpConverters;
 
 type
@@ -26,7 +25,6 @@   TTestCRCModel = class(THashLibAlgorithmTestCase)
     FCRC: IHash;
 
   protected
-    procedure Setup; override;
     procedure TearDown; override;
   published
     procedure TestCheckValue;
@@ -67,14 +65,6 @@ implementation
 
 { TTestCRCModel }
 
-procedure TTestCRCModel.Setup;
-begin
-  inherited;
-  WriteLn('PCLMULQDQ  : ', TSimd.HasPCLMULQDQ());
-  WriteLn('VPCLMULQDQ : ', TSimd.HasVPCLMULQDQ());
-  WriteLn('SIMD Level : ', Ord(TSimd.GetActiveLevel()));
-end;
-
 procedure TTestCRCModel.TearDown;
 begin
   FCRC := nil;

HashLib/src/Include/Simd/CRC/CRCFoldPclmul.inc

@@ -1,5 +1,6 @@
-// PCLMULQDQ-based CRC folding + Barrett reduction for reflected (LSB-first)
+// SSE2 + PCLMULQDQ CRC folding + Barrett reduction for reflected (LSB-first)
 // CRCs with width 8..32 (CRC-64 requires a separate path).
+// PCLMULQDQ instructions are db-encoded for broad assembler compatibility.
 //
 // Function signature (included after SimdProc4Begin.inc):
 //   function CRC_Fold_Pclmul(AData: PByte; ALength: UInt32;

HashLib/src/Include/Simd/CRC/CRCFoldVpclmul.inc

@@ -1,5 +1,6 @@
-// VPCLMULQDQ + AVX2 CRC folding + Barrett reduction for reflected (LSB-first)
+// AVX2 + VPCLMULQDQ CRC folding + Barrett reduction for reflected (LSB-first)
 // CRCs with width 8..32 (CRC-64 requires a separate path).
+// AVX2/VPCLMULQDQ instructions are db-encoded for broad assembler compatibility.
 //
 // Function signature (included after SimdProc4Begin.inc):
 //   function CRC_Fold_Vpclmul(AData: PByte; ALength: UInt32;
@@ -18,7 +19,6 @@
 // Reference: zlib-ng crc32_pclmulqdq_tpl.h (256-bit VPCLMULQDQ path)
 // and Linux kernel crc-pclmul-template.S by Eric Biggers (Barrett reduction).
 //
-// All VEX-encoded instructions are db-encoded for FPC compatibility.
 // VEX byte layout reference:
 //   2-byte: C5 [R.vvvv.L.pp]
 //   3-byte: C4 [R.X.B.mmmmm] [W.vvvv.L.pp]