* sparc/machine.m4 (TMP3): A third temporary register.

(AES_FINAL_ROUND): Prepared for scheduling.

Rev: src/nettle/sparc/machine.m4:1.10

sparc/machine.m4

@@ -7,6 +7,7 @@ C eval.
 C Used as temporaries by the AES macros
 define(<TMP1>, <%g1>)
 define(<TMP2>, <%g2>)
+define(<TMP3>, <%g3>)
 
 C Loop invariants used by AES_ROUND
 define(<T0>,	<%o0>)
@@ -62,31 +63,32 @@ C Compute one word in the final round function. Output is converted to
 C octets and stored at dst. Relies on AES_SBOX being zero.
 define(<AES_FINAL_ROUND>, <
 	C	Load subkey
-	ld	[$7 + eval(4*$1)], TMP1
+	ld	[$7 + eval(4*$1)], TMP3
 
-	and	$3, 0xff, TMP2
-	ldub	[T + TMP2], TMP2
+	and	$3, 0xff, TMP1		C  0
+	ldub	[T + TMP1], TMP1	C  0
 	nop
-	xor	TMP1, TMP2, TMP2
-	stb	TMP2, [$8 + eval(4*$1)]
+	xor	TMP3, TMP1, TMP1	C  0
+	stb	TMP1, [$8 + eval(4*$1)]	C  0
 	
-	srl	$4, 8, TMP2
-	and	TMP2, 0xff, TMP2
-	ldub	[T + TMP2], TMP2
-	srl	TMP1, 8, TMP1
-	xor	TMP1, TMP2, TMP2
-	stb	TMP2, [$8 + eval(4*$1 + 1)]
+	srl	$4, 8, TMP2		C  1
+	and	TMP2, 0xff, TMP2	C  1
+	ldub	[T + TMP2], TMP2	C  1
+	srl	TMP3, 8, TMP3		C  1
+	xor	TMP3, TMP2, TMP2	C  1
+	stb	TMP2, [$8 + eval(4*$1 + 1)]	C  1
 
-	srl	$5, 16, TMP2
-	and	TMP2, 0xff, TMP2
-	ldub	[T + TMP2], TMP2
-	srl	TMP1, 8, TMP1
-	xor	TMP1, TMP2, TMP2
-	stb	TMP2, [$8 + eval(4*$1 + 2)]
+	srl	$5, 16, TMP1		C  2
+	and	TMP1, 0xff, TMP1	C  2
+	ldub	[T + TMP1], TMP1	C  2
+	srl	TMP3, 8, TMP3		C  2
+	xor	TMP3, TMP1, TMP1	C  2
+	stb	TMP1, [$8 + eval(4*$1 + 2)]	C  2
 
-	srl	$6, 24, TMP2
-	ldub	[T + TMP2], TMP2
-	srl	TMP1, 8, TMP1
-	xor	TMP1, TMP2, TMP2
-	stb	TMP2, [$8 + eval(4*$1 + 3)]>)
+	srl	$6, 24, TMP2		C  3
+	ldub	[T + TMP2], TMP2	C  3
+	srl	TMP3, 8, TMP3		C  3
+	xor	TMP3, TMP2, TMP2	C  3
+	stb	TMP2, [$8 + eval(4*$1 + 3)]	C  3
+>)