yuzu-emu/mbedtls
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Whitespace - tidy up asm and make it more consistent

Browse source 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-05-12 16:29:48 +01:00
parent 81673bba77
commit 0cf9dd1056
1 changed files with 39 additions and 33 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

72
library/constant_time_impl.h
View file

@ -136,7 +136,7 @@ static inline mbedtls_ct_uint_t mbedtls_ct_compiler_opaque(mbedtls_ct_uint_t x)
* seem to apply unified syntax globally, which breaks other asm code.
*/
#if !defined(__clang__)
#define RESTORE_ASM_SYNTAX ".syntax divided \n\t"
#define RESTORE_ASM_SYNTAX ".syntax divided \n\t"
#else
#define RESTORE_ASM_SYNTAX
#endif
@ -154,9 +154,9 @@ static inline mbedtls_ct_condition_t mbedtls_ct_bool(mbedtls_ct_uint_t x)
*/
#if defined(MBEDTLS_CT_AARCH64_ASM) && (defined(MBEDTLS_CT_SIZE_32) || defined(MBEDTLS_CT_SIZE_64))
mbedtls_ct_uint_t s;
asm volatile ("neg %x[s], %x[x] \n\t"
"orr %x[x], %x[s], %x[x] \n\t"
"asr %x[x], %x[x], 63"
asm volatile ("neg %x[s], %x[x] \n\t"
"orr %x[x], %x[s], %x[x] \n\t"
"asr %x[x], %x[x], 63 \n\t"
:
[s] "=&r" (s),
[x] "+&r" (x)
@ -166,10 +166,10 @@ static inline mbedtls_ct_condition_t mbedtls_ct_bool(mbedtls_ct_uint_t x)
return (mbedtls_ct_condition_t) x;
#elif defined(MBEDTLS_CT_ARM_ASM) && defined(MBEDTLS_CT_SIZE_32)
uint32_t s;
asm volatile (".syntax unified \n\t"
"negs %[s], %[x] \n\t"
"orrs %[x], %[x], %[s] \n\t"
"asrs %[x], %[x], #31 \n\t"
asm volatile (".syntax unified \n\t"
"negs %[s], %[x] \n\t"
"orrs %[x], %[x], %[s] \n\t"
"asrs %[x], %[x], #31 \n\t"
RESTORE_ASM_SYNTAX
:
[s] "=&l" (s),
@ -232,9 +232,9 @@ static inline mbedtls_ct_uint_t mbedtls_ct_if(mbedtls_ct_condition_t condition,
mbedtls_ct_uint_t if0)
{
#if defined(MBEDTLS_CT_AARCH64_ASM) && (defined(MBEDTLS_CT_SIZE_32) || defined(MBEDTLS_CT_SIZE_64))
asm volatile ("and %x[if1], %x[if1], %x[condition] \n\t"
"mvn %x[condition], %x[condition] \n\t"
"and %x[condition], %x[condition], %x[if0] \n\t"
asm volatile ("and %x[if1], %x[if1], %x[condition] \n\t"
"mvn %x[condition], %x[condition] \n\t"
"and %x[condition], %x[condition], %x[if0] \n\t"
"orr %x[condition], %x[if1], %x[condition]"
:
[condition] "+&r" (condition),
@ -245,11 +245,11 @@ static inline mbedtls_ct_uint_t mbedtls_ct_if(mbedtls_ct_condition_t condition,
);
return (mbedtls_ct_uint_t) condition;
#elif defined(MBEDTLS_CT_ARM_ASM) && defined(MBEDTLS_CT_SIZE_32)
asm volatile (".syntax unified \n\t"
"ands %[if1], %[if1], %[condition] \n\t"
"mvns %[condition], %[condition] \n\t"
"ands %[condition], %[condition], %[if0] \n\t"
"orrs %[condition], %[if1], %[condition] \n\t"
asm volatile (".syntax unified \n\t"
"ands %[if1], %[if1], %[condition] \n\t"
"mvns %[condition], %[condition] \n\t"
"ands %[condition], %[condition], %[if0] \n\t"
"orrs %[condition], %[if1], %[condition] \n\t"
RESTORE_ASM_SYNTAX
:
[condition] "+&l" (condition),
@ -297,34 +297,40 @@ static inline mbedtls_ct_condition_t mbedtls_ct_uint_lt(mbedtls_ct_uint_t x, mbe
{
#if defined(MBEDTLS_CT_AARCH64_ASM) && (defined(MBEDTLS_CT_SIZE_32) || defined(MBEDTLS_CT_SIZE_64))
uint64_t s1;
asm volatile ("eor %x[s1], %x[y], %x[x] \n\t"
"sub %x[x], %x[x], %x[y] \n\t"
"bic %x[x], %x[x], %x[s1] \n\t"
"and %x[s1], %x[s1], %x[y] \n\t"
"orr %x[s1], %x[x], %x[s1] \n\t"
asm volatile ("eor %x[s1], %x[y], %x[x] \n\t"
"sub %x[x], %x[x], %x[y] \n\t"
"bic %x[x], %x[x], %x[s1] \n\t"
"and %x[s1], %x[s1], %x[y] \n\t"
"orr %x[s1], %x[x], %x[s1] \n\t"
"asr %x[x], %x[s1], 63"
: [s1] "=&r" (s1), [x] "+&r" (x)
: [y] "r" (y)
:
[s1] "=&r" (s1),
[x] "+&r" (x)
:
[y] "r" (y)
:
);
return (mbedtls_ct_condition_t) x;
#elif defined(MBEDTLS_CT_ARM_ASM) && defined(MBEDTLS_CT_SIZE_32)
uint32_t s1;
asm volatile (
".syntax unified \n\t"
".syntax unified \n\t"
#if defined(__thumb__) && !defined(__thumb2__)
"movs %[s1], %[x] \n\t"
"eors %[s1], %[s1], %[y] \n\t"
"movs %[s1], %[x] \n\t"
"eors %[s1], %[s1], %[y] \n\t"
#else
"eors %[s1], %[x], %[y] \n\t"
"eors %[s1], %[x], %[y] \n\t"
#endif
"subs %[x], %[x], %[y] \n\t"
"bics %[x], %[x], %[s1] \n\t"
"ands %[y], %[s1], %[y] \n\t"
"orrs %[x], %[x], %[y] \n\t"
"asrs %[x], %[x], #31 \n\t"
"subs %[x], %[x], %[y] \n\t"
"bics %[x], %[x], %[s1] \n\t"
"ands %[y], %[s1], %[y] \n\t"
"orrs %[x], %[x], %[y] \n\t"
"asrs %[x], %[x], #31 \n\t"
RESTORE_ASM_SYNTAX
: [s1] "=&l" (s1), [x] "+&l" (x), [y] "+&l" (y)
:
[s1] "=&l" (s1),
[x] "+&l" (x),
[y] "+&l" (y)
:
:
"cc"