Merge pull request #1524 from riscv/bitmanip-names

Fix mnemonics of Zbkx/Zbkb instructions

src/b-st-ext.adoc

@@ -912,7 +912,7 @@ common operations in cryptographic workloads.
 
 | ✓ 
 | ✓ 
-|  rev.b       
+|  brev8       
 | <<insns-revb>>
 
 | &#10003; 
@@ -984,12 +984,12 @@ latency does not depend on the (secret) data being operated on.
 
 |&#10003;
 |&#10003;
-|xperm.n _rd_, _rs1_, _rs2_
+|xperm4 _rd_, _rs1_, _rs2_
 |<<#insns-xpermn>>
 
 |&#10003;
 |&#10003;
-|xperm.b _rd_, _rs1_, _rs2_
+|xperm8 _rd_, _rs1_, _rs2_
 |<<#insns-xpermb>>
 
 |===
@@ -2569,13 +2569,13 @@ Included in::
 
 <<<
 [#insns-revb,reftext="Reverse bits in bytes"]
-==== rev.b
+==== brev8
 
 Synopsis::
 Reverse the bits in each byte of a source register.
 
 Mnemonic::
-rev.b _rd_, _rs_
+brev8 _rd_, _rs_
 
 Encoding::
 [wavedrom, , svg]
@@ -3472,13 +3472,13 @@ Included in::
 
 <<<
 [#insns-xpermb,reftext="Crossbar permutation (bytes)"]
-==== xperm.b
+==== xperm8
 
 Synopsis::
 Byte-wise lookup of indices into a vector in registers.
 
 Mnemonic::
-xperm.b _rd_, _rs1_, _rs2_
+xperm8 _rd_, _rs1_, _rs2_
 
 Encoding::
 [wavedrom, , svg]
@@ -3495,7 +3495,7 @@ Encoding::
 ....
 
 Description:: 
-The xperm.b instruction operates on bytes.
+The xperm8 instruction operates on bytes.
 The _rs1_ register contains a vector of XLEN/8 8-bit elements.
 The _rs2_ register contains a vector of XLEN/8 8-bit indexes.
 The result is each element in _rs2_ replaced by the indexed element in _rs1_,
@@ -3533,13 +3533,13 @@ Included in::
 
 <<<
 [#insns-xpermn,reftext="Crossbar permutation (nibbles)"]
-==== xperm.n
+==== xperm4
 
 Synopsis::
 Nibble-wise lookup of indices into a vector.
 
 Mnemonic::
-xperm.n _rd_, _rs1_, _rs2_
+xperm4 _rd_, _rs1_, _rs2_
 
 Encoding::
 [wavedrom, , svg]
@@ -3556,7 +3556,7 @@ Encoding::
 ....
 
 Description:: 
-The xperm.n instruction operates on nibbles.
+The xperm4 instruction operates on nibbles.
 The _rs1_ register contains a vector of XLEN/4 4-bit elements.
 The _rs2_ register contains a vector of XLEN/4 4-bit indexes.
 The result is each element in _rs2_ replaced by the indexed element in _rs1_,