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crypto: ghash-clmulni-intel - Use gas macro for PCLMULQDQ-NI and PSHUFB 

Old binutils do not support PCLMULQDQ-NI and PSHUFB, to make kernel
can be compiled by them, .byte code is used instead of assembly
instructions. But the readability and flexibility of raw .byte code is
not good.

So corresponding assembly instruction like gas macro is used instead.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Huang Ying 2009-11-23 19:55:22 +08:00 committed by Herbert Xu
parent b369e52123
commit 564ec0ec05
1 changed files with 10 additions and 19 deletions
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29
arch/x86/crypto/ghash-clmulni-intel_asm.S
View File

@ -17,7 +17,7 @@
*/
#include <linux/linkage.h>
#include <asm/i387.h>
#include <asm/inst.h>
.align 16
.Lbswap_mask:
@ -56,12 +56,9 @@ __clmul_gf128mul_ble:
pxor DATA, T2
pxor SHASH, T3
# pclmulqdq $0x00, SHASH, DATA # DATA = a0 * b0
.byte 0x66, 0x0f, 0x3a, 0x44, 0xc1, 0x00
# pclmulqdq $0x11, SHASH, T1 # T1 = a1 * b1
.byte 0x66, 0x0f, 0x3a, 0x44, 0xd1, 0x11
# pclmulqdq $0x00, T3, T2 # T2 = (a1 + a0) * (b1 + b0)
.byte 0x66, 0x0f, 0x3a, 0x44, 0xdc, 0x00
PCLMULQDQ 0x00 SHASH DATA # DATA = a0 * b0
PCLMULQDQ 0x11 SHASH T1 # T1 = a1 * b1
PCLMULQDQ 0x00 T3 T2 # T2 = (a1 + a0) * (b1 + b0)
pxor DATA, T2
pxor T1, T2 # T2 = a0 * b1 + a1 * b0
@ -101,11 +98,9 @@ ENTRY(clmul_ghash_mul)
movups (%rdi), DATA
movups (%rsi), SHASH
movaps .Lbswap_mask, BSWAP
# pshufb BSWAP, DATA
PSHUFB_XMM5_XMM0
PSHUFB_XMM BSWAP DATA
call __clmul_gf128mul_ble
# pshufb BSWAP, DATA
.byte 0x66, 0x0f, 0x38, 0x00, 0xc5
PSHUFB_XMM BSWAP DATA
movups DATA, (%rdi)
ret
@ -119,21 +114,18 @@ ENTRY(clmul_ghash_update)
movaps .Lbswap_mask, BSWAP
movups (%rdi), DATA
movups (%rcx), SHASH
# pshufb BSWAP, DATA
PSHUFB_XMM5_XMM0
PSHUFB_XMM BSWAP DATA
.align 4
.Lupdate_loop:
movups (%rsi), IN1
# pshufb BSWAP, IN1
PSHUFB_XMM5_XMM6
PSHUFB_XMM BSWAP IN1
pxor IN1, DATA
call __clmul_gf128mul_ble
sub $16, %rdx
add $16, %rsi
cmp $16, %rdx
jge .Lupdate_loop
# pshufb BSWAP, DATA
PSHUFB_XMM5_XMM0
PSHUFB_XMM BSWAP DATA
movups DATA, (%rdi)
.Lupdate_just_ret:
ret
@ -146,8 +138,7 @@ ENTRY(clmul_ghash_update)
ENTRY(clmul_ghash_setkey)
movaps .Lbswap_mask, BSWAP
movups (%rsi), %xmm0
# pshufb BSWAP, %xmm0
PSHUFB_XMM5_XMM0
PSHUFB_XMM BSWAP %xmm0
movaps %xmm0, %xmm1
psllq $1, %xmm0
psrlq $63, %xmm1