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Reintroduce though-to-be unused variable in correct place

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The variable is a local variable for the i386 bignum assembly only;
introduce it as part of the start/finish macros.

It can be noted that the variable is initialize to 0 within MULADDC_INIT,
so there are no data dependencies across blocks of MULADDC_INIT/CORE/STOP.

Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit is contained in:
Hanno Becker 2022-04-11 10:44:02 +01:00
parent 5d4ceeb25c
commit efdc519864
1 changed files with 4 additions and 2 deletions
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6
library/bn_mul.h
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@ -99,6 +99,7 @@
#if defined(__i386__) && defined(__OPTIMIZE__) #if defined(__i386__) && defined(__OPTIMIZE__)
#define MULADDC_INIT \ #define MULADDC_INIT \
{ mbedtls_mpi_uint t; \
asm( \ asm( \
"movl %%ebx, %0 \n\t" \ "movl %%ebx, %0 \n\t" \
"movl %5, %%esi \n\t" \ "movl %5, %%esi \n\t" \
@ -190,7 +191,8 @@
: "=m" (t), "=m" (c), "=m" (d), "=m" (s) \ : "=m" (t), "=m" (c), "=m" (d), "=m" (s) \
: "m" (t), "m" (s), "m" (d), "m" (c), "m" (b) \ : "m" (t), "m" (s), "m" (d), "m" (c), "m" (b) \
: "eax", "ebx", "ecx", "edx", "esi", "edi" \ : "eax", "ebx", "ecx", "edx", "esi", "edi" \
); ); } \
#else #else
@ -202,7 +204,7 @@
: "=m" (t), "=m" (c), "=m" (d), "=m" (s) \ : "=m" (t), "=m" (c), "=m" (d), "=m" (s) \
: "m" (t), "m" (s), "m" (d), "m" (c), "m" (b) \ : "m" (t), "m" (s), "m" (d), "m" (c), "m" (b) \
: "eax", "ebx", "ecx", "edx", "esi", "edi" \ : "eax", "ebx", "ecx", "edx", "esi", "edi" \
); ); }
#endif /* SSE2 */ #endif /* SSE2 */
#endif /* i386 */ #endif /* i386 */