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Fix build errors on x32 by using the generic 'add' instruction

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On x32 systems, pointers are 4-bytes wide and are therefore stored in %e?x
registers (instead of %r?x registers). These registers must be accessed using
"addl" instead of "addq", however the GNU assembler will acccept the generic
"add" instruction and determine the correct opcode based on the registers
passed to it.
This commit is contained in:
James Cowgill 2015-12-17 01:40:26 +00:00 committed by Simon Butcher
parent b19bac4d82
commit 5c1e24ca05
1 changed files with 3 additions and 3 deletions
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6
library/aesni.c
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@ -100,7 +100,7 @@ int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
asm( "movdqu (%3), %%xmm0 \n\t" // load input
"movdqu (%1), %%xmm1 \n\t" // load round key 0
"pxor %%xmm1, %%xmm0 \n\t" // round 0
"addq $16, %1 \n\t" // point to next round key
"add $16, %1 \n\t" // point to next round key
"subl $1, %0 \n\t" // normal rounds = nr - 1
"test %2, %2 \n\t" // mode?
"jz 2f \n\t" // 0 = decrypt
@ -108,7 +108,7 @@ int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
"1: \n\t" // encryption loop
"movdqu (%1), %%xmm1 \n\t" // load round key
AESENC xmm1_xmm0 "\n\t" // do round
"addq $16, %1 \n\t" // point to next round key
"add $16, %1 \n\t" // point to next round key
"subl $1, %0 \n\t" // loop
"jnz 1b \n\t"
"movdqu (%1), %%xmm1 \n\t" // load round key
@ -118,7 +118,7 @@ int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
"2: \n\t" // decryption loop
"movdqu (%1), %%xmm1 \n\t"
AESDEC xmm1_xmm0 "\n\t" // do round
"addq $16, %1 \n\t"
"add $16, %1 \n\t"
"subl $1, %0 \n\t"
"jnz 2b \n\t"
"movdqu (%1), %%xmm1 \n\t" // load round key