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Commit 57ae1b05 authored by Sandy Wu's avatar Sandy Wu Committed by Herbert Xu
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crypto: crc32-pclmul - Use gas macro for pclmulqdq 



Occurs when CONFIG_CRYPTO_CRC32C_INTEL=y and CONFIG_CRYPTO_CRC32C_INTEL=y.
Older versions of bintuils do not support the pclmulqdq instruction. The
PCLMULQDQ gas macro is used instead.

Signed-off-by: default avatarSandy Wu <sandyw@twitter.com>
Cc: stable@vger.kernel.org # 3.8+
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 8c4196a2

arch/x86/crypto/crc32c-pcl-intel-asm_64.S

+3 −2
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ 
 * SOFTWARE.

 */



#include <asm/inst.h>

#include <linux/linkage.h>



## ISCSI CRC 32 Implementation with crc32 and pclmulqdq Instruction
@@ -226,10 +227,10 @@ LABEL crc_ %i 
	movdqa  (bufp), %xmm0			# 2 consts: K1:K2



	movq    crc_init, %xmm1			# CRC for block 1

	pclmulqdq $0x00,%xmm0,%xmm1		# Multiply by K2

	PCLMULQDQ 0x00,%xmm0,%xmm1		# Multiply by K2



	movq    crc1, %xmm2			# CRC for block 2

	pclmulqdq $0x10, %xmm0, %xmm2		# Multiply by K1

	PCLMULQDQ 0x10, %xmm0, %xmm2		# Multiply by K1



	pxor    %xmm2,%xmm1

	movq    %xmm1, %rax