It seems that:
ldr q8, =0x30000000200000001
is a GNU as convience notation for:
ldr q8, .Lconstant
.Lconstant
.word 0x00000001
.word 0x00000002
.word 0x00000003
.word 0x00000000
based on this comment in binutils' source [0]. I've asked for this
non-standard convience notation to be added to other assemblers [1], but
until then, we can remove it and get equivalent disassembly:
before:
00000000000009d4 <neon_aes_ctr_encrypt>:
...
a48: 9c000ac8 ldr q8, ba0 <neon_aes_ctr_encrypt+0x1cc>
...
ba0: 00000001 .word 0x00000001
ba4: 00000002 .word 0x00000002
ba8: 00000003 .word 0x00000003
bac: 00000000 .word 0x00000000
after:
00000000000009d4 <neon_aes_ctr_encrypt>:
...
a48: 9c000aa8 ldr q8, b9c <neon_aes_ctr_encrypt+0x1c8>
...
b9c: 00000001 .word 0x00000001
ba0: 00000002 .word 0x00000002
ba4: 00000003 .word 0x00000003
ba8: 00000000 .word 0x00000000
[0] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=gas/testsuite/gas/aarch64/programmer-friendly.s;h=6254c6476efdc848648b05068be0574e7addc85d;hb=HEAD#l11
[1] https://bugs.llvm.org/show_bug.cgi?id=38642
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
---
arch/arm64/crypto/aes-modes.S | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/crypto/aes-modes.S b/arch/arm64/crypto/aes-modes.S
index 483a7130cf0e..9288c5b0eca2 100644
--- a/arch/arm64/crypto/aes-modes.S
+++ b/arch/arm64/crypto/aes-modes.S
@@ -232,7 +232,7 @@ AES_ENTRY(aes_ctr_encrypt)
bmi .Lctr1x
cmn w6, #4 /* 32 bit overflow? */
bcs .Lctr1x
- ldr q8, =0x30000000200000001 /* addends 1,2,3[,0] */
+ ldr q8, .Laddends /* addends 1,2,3[,0] */
dup v7.4s, w6
mov v0.16b, v4.16b
add v7.4s, v7.4s, v8.4s
@@ -295,6 +295,12 @@ AES_ENTRY(aes_ctr_encrypt)
rev x7, x7
ins v4.d[0], x7
b .Lctrcarrydone
+
+.Laddends:
+ .word 0x00000001
+ .word 0x00000002
+ .word 0x00000003
+ .word 0x00000000
AES_ENDPROC(aes_ctr_encrypt)
.ltorg
--
2.18.0.865.gffc8e1a3cd6-goog
