sha/asm/keccak1600-avx2.pl: remodel register usage.

This gives much more freedom to rearrange instructions. This is
unoptimized version, provided for reference. Basically you need
to compare it to initial 29724d0e
to figure out the key difference.
Reviewed-by: NRich Salz <rsalz@openssl.org>

crypto/sha/asm/keccak1600-avx2.pl

@@ -111,16 +111,10 @@ my @A_jagged = ([0,0], [1,0], [1,1], [1,2], [1,3],	# [0][0..4]
 #
 #			r=1088(*)
 #
-# Haswell		8.9/+8%
-# Skylake		7.9/+19%
-# Ryzen			17(**)
+# Haswell		9.5
+# Skylake		8.8
 #
-# (*)	Corresponds to SHA3-256. Percentage after slash is improvement
-#	coefficient in comparison to scalar keccak1600-x86_64.pl.
-# (**)	It's expected that Ryzen performs poorly, because instruction
-#	issue rate is limited to two AVX2 instructions per cycle and
-#	in addition vpblendd is reportedly bound to specific port.
-#	Obviously this code path should not be executed on Ryzen.
+# (*)	Corresponds to SHA3-256.
 
 my @T = map("%ymm$_",(7..15));
 my ($C14,$C00,$D00,$D14) = @T[5..8];
@@ -140,135 +134,137 @@ __KeccakF1600:
 .align	32
 .Loop_avx2:
 	######################################### Theta
-	vpshufd		\$0b01001110,$A20,$C00
-	vpxor		$A31,$A01,$C14
-	vpxor		$A41,$A21,@T[0]
-	vpxor		$A11,$C14,$C14
-	vpxor		@T[0],$C14,$C14		# C[1..4]
-
-	vpermq		\$0b11111111,$C14,@T[3]
-	vpermq		\$0b10010011,$C14,@T[4]
-
+	vpxor		$A01,$A31,$C14
+	vpxor		$A21,$C14,$C14
+	vpxor		$A41,$C14,$C14
+	vpxor		$A11,$C14,$C14		# C[1..4]
+	vpermq		\$0b10110001,$A20,$C00
 	vpxor		$A20,$C00,$C00
 	vpermq		\$0b01001110,$C00,@T[0]
+	vpxor		$A00,$C00,$C00
+	vpxor		@T[0],$C00,$C00		# C[0..0]
 
 	vpsrlq		\$63,$C14,@T[1]
-	vpaddq		$C14,$C14,@T[2]
-	vpor		@T[2],@T[1],@T[1]	# ROL64(C[1..4],1)
+	vpaddq		$C14,$C14,@T[3]
+	vpor		@T[3],@T[1],@T[1]	# ROL64(C[1..4],1)
 
-	vpermq		\$0b00111001,@T[1],$D14
-	vpxor		@T[3],@T[1],$D00
+	vpsrlq		\$63,$C00,@T[0]
+	vpaddq		$C00,$C00,@T[2]
+	vpor		@T[2],@T[0],@T[0]	# ROL64(C[0..0],1)
 
-	vpxor		$A00,$C00,$C00
-	vpxor		@T[0],$C00,$C00		# C[0..0]
+	vpermq		\$0b00000000,@T[1],$D00	
+	vpermq		\$0b11111111,$C14,@T[3]
+	vpxor		@T[3],$D00,$D00		# D[0..0] = ROL64(C[1],1) ^ C[4]
 
-	vpsrlq		\$63,$C00,@T[0]
-	vpaddq		$C00,$C00,@T[1]
-	vpor		@T[0],@T[1],@T[1]	# ROL64(C[0..0],1)
+	vpermq		\$0b00111001,@T[1],$D14
+	vpblendd	\$0b11000000,@T[0],$D14,$D14
+	vpermq		\$0b10010011,$C14,@T[2]
+	vpblendd	\$0b00000011,$C00,@T[2],@T[2]
+	vpxor		@T[2],$D14,$D14		# D[1..4] = ROL64(C[2..4,0),1) ^ C[0..3]
 
-	vpermq		\$0b00000000,$D00,$D00	# D[0..0] = ROL64(C[1],1) ^ C[4]
-	vpxor		$D00,$A20,$A20		# ^= D[0..0]
 	vpxor		$D00,$A00,$A00		# ^= D[0..0]
+	vpxor		$D00,$A20,$A20		# ^= D[0..0]
+	vpxor		$D14,$A01,$A01		# ^= D[1..4]
+	vpxor		$D14,$A31,$A31		# ^= D[1..4]
+	vpxor		$D14,$A21,$A21		# ^= D[1..4]
+	vpxor		$D14,$A41,$A41		# ^= D[1..4]
+	vpxor		$D14,$A11,$A11		# ^= D[1..4]
 
-	vpblendd	\$0b11000000,@T[1],$D14,$D14
-	vpblendd	\$0b00000011,$C00,@T[4],@T[4]
-	vpxor		@T[4],$D14,$D14		# D[1..4] = ROL64(C[2..4,0),1) ^ C[0..3]
-
-	######################################### Rho + Pi + pre-Chi shuffle
+	######################################### Rho
 	vpsllvq		0*32-96(%r8),$A20,@T[0]
 	vpsrlvq		0*32-96(%r9),$A20,$A20
-	vpor		$A20,@T[0],@T[0]	# $A20
+	vpor		@T[0],$A20,$A20
+
+	vpsllvq		1*32-96(%r8),$A01,@T[1]
+	vpsrlvq		1*32-96(%r9),$A01,$A01
+	vpor		@T[1],$A01,$A01
 
-	 vpxor		$D14,$A31,$A31		# ^= D[1..4]
 	vpsllvq		2*32-96(%r8),$A31,@T[2]
 	vpsrlvq		2*32-96(%r9),$A31,$A31
-	vpor		$A31,@T[2],@T[2]	# $A31
+	vpor		@T[2],$A31,$A31
 
-	 vpxor		$D14,$A21,$A21		# ^= D[1..4]
 	vpsllvq		3*32-96(%r8),$A21,@T[3]
 	vpsrlvq		3*32-96(%r9),$A21,$A21
-	vpor		$A21,@T[3],@T[3]	# $A21
+	vpor		@T[3],$A21,$A21
 
-	 vpermq		\$0b10001101,@T[0],$A31	# $A20 -> $A31
-	 vpermq		\$0b10001101,@T[2],$A21	# $A31 -> $A21
-	 vpxor		$D14,$A41,$A41		# ^= D[1..4]
 	vpsllvq		4*32-96(%r8),$A41,@T[4]
 	vpsrlvq		4*32-96(%r9),$A41,$A41
+	vpor		@T[4],$A41,$A41
 
-	 vpxor		$D14,$A01,$A01		# ^= D[1..4]
-	 vpxor		$D14,$A11,$T[6]		# ^= D[1..4]
-	vpsllvq		1*32-96(%r8),$A01,@T[1]
-	vpsrlvq		1*32-96(%r9),$A01,$A01
-	vpor		$A41,@T[4],@T[4]	# $A41
-	vpor		@T[1],$A01,$A20		# $A01 -> $A20
+	vpsllvq		5*32-96(%r8),$A11,@T[5]
+	vpsrlvq		5*32-96(%r9),$A11,$A11
+	vpor		@T[5],$A11,$A11
 
-	 vpermq		\$0b00011011,@T[3],$A41	# $A21 -> $A41
-	 vpermq		\$0b01110010,@T[4],$A11	# $A41 -> $A11
-	vpsllvq		5*32-96(%r8),$T[6],@T[5]
-	vpsrlvq		5*32-96(%r9),@T[6],@T[6]
-	vpor		@T[5],@T[6],$A01	# $A11 -> $A01
+	######################################### Pi + pre-Chi shuffle
+	vpermq		\$0b01110010,$A41,@T[6]	# vpermq \$0b00011011,$A41,$A11
+	vpermq		\$0b00011011,$A21,@T[5]	# vpermq \$0b01110010,$A21,$A41
+	vpermq		\$0b10001101,$A31,@T[4]	# vpermq \$0b10001101,$A31,$A21
+	vpermq		\$0b10001101,$A20,@T[3]	# vpermq \$0b01110010,$A20,$A31
+	vmovdqa		$A01,@T[2]
+	vmovdqa		$A11,@T[1]
 
 	######################################### Chi
-	vpsrldq		\$8,$A01,@T[0]
-	vpandn		@T[0],$A01,@T[0]	# tgting  [0][0]
+	vpermq		\$0b00000000,@T[1],@T[0]	# [0][1] [0][1] [0][1] [0][1]
+	vpermq		\$0b01010101,@T[1],@T[7]	# [0][2] [0][2] [0][2] [0][2]
+	vpandn		@T[7],@T[0],@T[0]	# tgting  [0][0] [0][0] [0][0] [0][0]
 
-	vpermq		\$0b00111001,$A01,@T[1]		# [0][1] [0][4] [0][3] [0][2]
-	vpermq		\$0b00011110,$A01,@T[8]		# [0][1] [0][2] [0][4] [0][3]
-	vpblendd	\$0b11000000,$A00,@T[1],@T[1]	# [0][0] [0][4] [0][3] [0][2]
+	vpermq		\$0b00111001,@T[1],$A01		# [0][1] [0][4] [0][3] [0][2]
+	vpermq		\$0b00011110,@T[1],@T[8]	# [0][1] [0][2] [0][4] [0][3]
+	vpblendd	\$0b11000000,$A00,$A01,$A01	# [0][0] [0][4] [0][3] [0][2]
 	vpblendd	\$0b00110000,$A00,@T[8],@T[8]	# [0][1] [0][0] [0][4] [0][3]
-	vpxor		@T[0],$A00,$A00		# broadcasted below
-	vpandn		@T[8],@T[1],@T[1]	# tgting  [0][4] [0][3] [0][2] [0][1]
-
-	vpblendd	\$0b00001100,$A41,$A21, @T[2]	#               [4][1] [2][1]
-	vpblendd	\$0b00001100,$A21,$A11, @T[4]	#               [4][2] [2][2]
-	vpblendd	\$0b00110000,$A11,@T[2],@T[2]	#        [1][1] [4][1] [2][1]
-	vpblendd	\$0b00110000,$A31,@T[4],@T[4]	#        [1][2] [4][2] [2][2]
-	vpblendd	\$0b11000000,$A31,@T[2],@T[2]	# [3][1] [1][1] [4][1] [2][1]
-	vpblendd	\$0b11000000,$A41,@T[4],@T[4]	# [3][2] [1][2] [4][2] [2][2]
-	vpandn		@T[4],@T[2],@T[2]	# tgting  [3][0] [1][0] [4][0] [2][0]
-
-	vpblendd	\$0b00001100,$A11,$A20, @T[3]	#               [4][4] [2][0]
-	vpblendd	\$0b00001100,$A20,$A21, @T[5]	#               [4][0] [2][1]
-	vpblendd	\$0b00110000,$A21,@T[3],@T[3]	#        [1][3] [4][4] [2][0]
-	vpblendd	\$0b00110000,$A41,@T[5],@T[5]	#        [1][4] [4][0] [2][1]
-	vpblendd	\$0b11000000,$A41,@T[3],@T[3]	# [3][2] [1][3] [4][4] [2][0]
-	vpblendd	\$0b11000000,$A11,@T[5],@T[5]	# [3][3] [1][4] [4][0] [2][1]
-	vpandn		@T[5],@T[3],@T[3]	# tgting  [3][1] [1][2] [4][3] [2][4]
-	vpxor		$A31,@T[3],@T[3]
-
-	vpblendd	\$0b00001100,$A21,$A31, @T[5]	#               [4][2] [2][4]
-	vpblendd	\$0b00001100,$A31,$A20, @T[6]	#               [4][3] [2][0]
-	vpblendd	\$0b00110000,$A20,@T[5],@T[5]	#        [1][0] [4][2] [2][4]
-	vpblendd	\$0b00110000,$A11,@T[6],@T[6]	#        [1][1] [4][3] [2][0]
-	vpblendd	\$0b11000000,$A11,@T[5],@T[5]	# [3][3] [1][0] [4][2] [2][4]
-	vpblendd	\$0b11000000,$A21,@T[6],@T[6]	# [3][4] [1][1] [4][3] [2][0]
-	vpandn		@T[6],@T[5],@T[5]	# tgting  [3][2] [1][4] [4][1] [2][3]
-	vpxor		$A41,@T[5],@T[5]
-
-	vpblendd	\$0b00001100,$A20,$A41, @T[6]	#               [4][0] [2][3]
-	vpblendd	\$0b00001100,$A41,$A31, @T[7]	#               [4][1] [2][4]
-	vpblendd	\$0b00110000,$A31,@T[6],@T[6]	#        [1][2] [4][0] [2][3]
-	vpblendd	\$0b00110000,$A21,@T[7],@T[7]	#        [1][3] [4][1] [2][4]
-	vpblendd	\$0b11000000,$A21,@T[6],@T[6]	# [3][4] [1][2] [4][0] [2][3]
-	vpblendd	\$0b11000000,$A20,@T[7],@T[7]	# [3][0] [1][3] [4][1] [2][4]
-	vpblendd	\$0b00001100,$A31,$A41, @T[4]	#        [1][4] [4][3]
-	vpblendd	\$0b11000000,$A31,$A41, @T[8]	# [3][1]               [2][3]
-	vpandn		@T[7],@T[6],@T[6]	# tgting  [3][3] [1][1] [4][4] [2][2]
-	 vpermq		\$0b00011011,@T[3],$A31	######### post-Chi shuffle
-	 vpermq		\$0b10001101,@T[5],$A41
-	vpxor		$A11,@T[6],@T[6]
-	 vpermq		\$0b00000000,$A00,$A00	# broadcast A[0][0]
-
-	vpblendd	\$0b00000011,$A11,@T[4],@T[4]	#        [1][4] [4][3] [2][2]
-	vpblendd	\$0b00001100,$A11,@T[8],@T[8]	# [3][1]        [4][4] [2][3]
-	 vpermq		\$0b01110010,@T[6],$A11
-	vpblendd	\$0b11000000,$A20,@T[4],@T[4]	# [3][0] [1][4] [4][3] [2][2]
-	vpblendd	\$0b00110000,$A20,@T[8],@T[8]	# [3][1] [1][0] [4][4] [2][3]
-	vpandn		@T[8],@T[4],@T[4]	# tgting  [3][4] [1][3] [4][2] [2][1]
-
-	vpxor		@T[2],$A20,$A20
+	vpandn		@T[8],$A01,$A01		# tgting  [0][4] [0][3] [0][2] [0][1]
+
+	vpblendd	\$0b00001100,@T[5],@T[4],$A20	#               [4][1] [2][1]
+	vpblendd	\$0b00110000,@T[6],$A20,$A20	#        [1][1] [4][1] [2][1]
+	vpblendd	\$0b11000000,@T[3],$A20,$A20	# [3][1] [1][1] [4][1] [2][1]
+	vpblendd	\$0b00001100,@T[4],@T[6],@T[7]	#               [4][2] [2][2]
+	vpblendd	\$0b00110000,@T[3],@T[7],@T[7]	#        [1][2] [4][2] [2][2]
+	vpblendd	\$0b11000000,@T[5],@T[7],@T[7]	# [3][2] [1][2] [4][2] [2][2]
+	vpandn		@T[7],$A20,$A20		# tgting  [3][0] [1][0] [4][0] [2][0]
+
+	vpblendd	\$0b00001100,@T[6],@T[2],$A31	#               [4][4] [2][0]
+	vpblendd	\$0b00110000,@T[4],$A31,$A31	#        [1][3] [4][4] [2][0]
+	vpblendd	\$0b11000000,@T[5],$A31,$A31	# [3][2] [1][3] [4][4] [2][0]
+	vpblendd	\$0b00001100,@T[2],@T[4],@T[8]	#               [4][0] [2][1]
+	vpblendd	\$0b00110000,@T[5],@T[8],@T[8]	#        [1][4] [4][0] [2][1]
+	vpblendd	\$0b11000000,@T[6],@T[8],@T[8]	# [3][3] [1][4] [4][0] [2][1]
+	vpandn		@T[8],$A31,$A31		# tgting  [3][1] [1][2] [4][3] [2][4]
+
+	vpblendd	\$0b00001100,@T[3],@T[6],$A21	#               [4][3] [2][2]
+	vpblendd	\$0b00110000,@T[5],$A21,$A21	#        [1][4] [4][3] [2][2]
+	vpblendd	\$0b11000000,@T[2],$A21,$A21	# [3][0] [1][4] [4][3] [2][2]
+	vpblendd	\$0b00001100,@T[6],@T[5],@T[7]	#               [4][4] [2][3]
+	vpblendd	\$0b00110000,@T[2],@T[7],@T[7]	#        [1][0] [4][4] [2][3]
+	vpblendd	\$0b11000000,@T[3],@T[7],@T[7]	# [3][1] [1][0] [4][4] [2][3]
+	vpandn		@T[7],$A21,$A21		# tgting  [3][4] [1][3] [4][2] [2][1]
+
+	vpblendd	\$0b00001100,@T[4],@T[3],$A41	#               [4][2] [2][4]
+	vpblendd	\$0b00110000,@T[2],$A41,$A41	#        [1][0] [4][2] [2][4]
+	vpblendd	\$0b11000000,@T[6],$A41,$A41	# [3][3] [1][0] [4][2] [2][4]
+	vpblendd	\$0b00001100,@T[3],@T[2],@T[8]	#               [4][3] [2][0]
+	vpblendd	\$0b00110000,@T[6],@T[8],@T[8]	#        [1][1] [4][3] [2][0]
+	vpblendd	\$0b11000000,@T[4],@T[8],@T[8]	# [3][4] [1][1] [4][3] [2][0]
+	vpandn		@T[8],$A41,$A41		# tgting  [3][2] [1][4] [4][1] [2][3]
+
+	vpblendd	\$0b00001100,@T[2],@T[5],$A11	#               [4][0] [2][3]
+	vpblendd	\$0b00110000,@T[3],$A11,$A11	#        [1][2] [4][0] [2][3]
+	vpblendd	\$0b11000000,@T[4],$A11,$A11	# [3][4] [1][2] [4][0] [2][3]
+	vpblendd	\$0b00001100,@T[5],@T[3],@T[7]	#               [4][1] [2][4]
+	vpblendd	\$0b00110000,@T[4],@T[7],@T[7]	#        [1][3] [4][1] [2][4]
+	vpblendd	\$0b11000000,@T[2],@T[7],@T[7]	# [3][0] [1][3] [4][1] [2][4]
+	vpandn		@T[7],$A11,$A11		# tgting  [3][3] [1][1] [4][4] [2][2]
+
+	vpxor		@T[0],$A00,$A00
 	vpxor		@T[1],$A01,$A01
+	vpxor		@T[2],$A20,$A20
+	vpxor		@T[3],$A31,$A31
 	vpxor		@T[4],$A21,$A21
+	vpxor		@T[5],$A41,$A41
+	vpxor		@T[6],$A11,$A11
+
+	vpermq		\$0b00011011,$A31,$A31	# post-Chi shuffle
+	vpermq		\$0b10001101,$A41,$A41
+	vpermq		\$0b01110010,$A11,$A11
 
 	######################################### Iota
 	vpxor		(%r10),$A00,$A00