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Fix coding style in library/armv8ce_aes.c

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Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit is contained in:
Hanno Becker 2020-08-14 10:34:54 +01:00
parent e177719417
commit 140fd9c0ba
1 changed files with 24 additions and 24 deletions
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48
library/armv8ce_aes.c
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@ -49,12 +49,12 @@ int mbedtls_armv8ce_aes_crypt_ecb( mbedtls_aes_context *ctx,
const uint8_t *rk;
uint8x16_t x, k;
x = vld1q_u8( input ); // input block
rk = (const uint8_t *) ctx->rk; // round keys
x = vld1q_u8( input ); /* input block */
rk = (const uint8_t *) ctx->rk; /* round keys */
if( mode == MBEDTLS_AES_ENCRYPT )
{
for( i = ctx->nr - 1; i ; i-- ) // encryption loop
for( i = ctx->nr - 1; i != 0; i-- ) /* encryption loop */
{
k = vld1q_u8( rk );
rk += 16;
@ -67,7 +67,7 @@ int mbedtls_armv8ce_aes_crypt_ecb( mbedtls_aes_context *ctx,
}
else
{
for( i = ctx->nr - 1; i ; i-- ) // decryption loop
for( i = ctx->nr - 1; i != 0 ; i-- ) /* decryption loop */
{
k = vld1q_u8( rk );
rk += 16;
@ -79,9 +79,9 @@ int mbedtls_armv8ce_aes_crypt_ecb( mbedtls_aes_context *ctx,
x = vaesdq_u8( x, k );
}
k = vld1q_u8( rk ); // final key just XORed
k = vld1q_u8( rk ); /* final key just XORed */
x = veorq_u8( x, k );
vst1q_u8( output, x ); // write out
vst1q_u8( output, x ); /* write out */
return ( 0 );
}
@ -99,42 +99,42 @@ void mbedtls_armv8ce_gcm_mult( unsigned char c[16],
const unsigned char a[16],
const unsigned char b[16] )
{
// GCM's GF(2^128) polynomial basis is x^128 + x^7 + x^2 + x + 1
const uint64x2_t base = { 0, 0x86 }; // note missing LS bit
/* GCM's GF(2^128) polynomial basis is x^128 + x^7 + x^2 + x + 1 */
const uint64x2_t base = { 0, 0x86 }; /* note missing LS bit */
register uint8x16_t vc asm( "v0" ); // named registers
register uint8x16_t va asm( "v1" ); // (to avoid conflict)
register uint8x16_t vc asm( "v0" ); /* named registers */
register uint8x16_t va asm( "v1" ); /* (to avoid conflict) */
register uint8x16_t vb asm( "v2" );
register uint64x2_t vp asm( "v3" );
va = vld1q_u8( a ); // load inputs
va = vld1q_u8( a ); /* load inputs */
vb = vld1q_u8( b );
vp = base;
asm (
"rbit %1.16b, %1.16b \n\t" // reverse bit order
"rbit %1.16b, %1.16b \n\t" /* reverse bit order */
"rbit %2.16b, %2.16b \n\t"
"pmull2 %0.1q, %1.2d, %2.2d \n\t" // v0 = a.hi * b.hi
"pmull2 v4.1q, %0.2d, %3.2d \n\t" // mul v0 by x^64, reduce
"pmull2 %0.1q, %1.2d, %2.2d \n\t" /* v0 = a.hi * b.hi */
"pmull2 v4.1q, %0.2d, %3.2d \n\t" /* mul v0 by x^64, reduce */
"ext %0.16b, %0.16b, %0.16b, #8 \n\t"
"eor %0.16b, %0.16b, v4.16b \n\t"
"ext v5.16b, %2.16b, %2.16b, #8 \n\t" // (swap hi and lo in b)
"pmull v4.1q, %1.1d, v5.1d \n\t" // v0 ^= a.lo * b.hi
"ext v5.16b, %2.16b, %2.16b, #8 \n\t" /* (swap hi and lo in b) */
"pmull v4.1q, %1.1d, v5.1d \n\t" /* v0 ^= a.lo * b.hi */
"eor %0.16b, %0.16b, v4.16b \n\t"
"pmull2 v4.1q, %1.2d, v5.2d \n\t" // v0 ^= a.hi * b.lo
"pmull2 v4.1q, %1.2d, v5.2d \n\t" /* v0 ^= a.hi * b.lo */
"eor %0.16b, %0.16b, v4.16b \n\t"
"pmull2 v4.1q, %0.2d, %3.2d \n\t" // mul v0 by x^64, reduce
"pmull2 v4.1q, %0.2d, %3.2d \n\t" /* mul v0 by x^64, reduce */
"ext %0.16b, %0.16b, %0.16b, #8 \n\t"
"eor %0.16b, %0.16b, v4.16b \n\t"
"pmull v4.1q, %1.1d, %2.1d \n\t" // v0 ^= a.lo * b.lo
"pmull v4.1q, %1.1d, %2.1d \n\t" /* v0 ^= a.lo * b.lo */
"eor %0.16b, %0.16b, v4.16b \n\t"
"rbit %0.16b, %0.16b \n\t" // reverse bits for output
: "=w" (vc) // q0: output
: "w" (va), "w" (vb), "w" (vp) // q1, q2: input
: "v4", "v5" // q4, q5: clobbered
"rbit %0.16b, %0.16b \n\t" /* reverse bits for output */
: "=w" (vc) /* q0: output */
: "w" (va), "w" (vb), "w" (vp) /* q1, q2: input */
: "v4", "v5" /* q4, q5: clobbered */
);
vst1q_u8( c, vc ); // write out
vst1q_u8( c, vc ); /* write out */
}
#endif /* MBEDTLS_GCM_C */