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Merge pull request #4978 from davidhorstmann-arm/2.x-fix-aarch64-asm-constraints

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Backport 2.x: Fix aarch64 assembly for bignum multiplication
This commit is contained in:
Gilles Peskine
2021-09-27 09:01:12 +02:00
committed by GitHub
parent 97cd76988d 27d8b5c680
commit 186c0216b0
3 changed files with 11 additions and 10 deletions
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12
include/mbedtls/bn_mul.h
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@ -244,18 +244,18 @@
#define MULADDC_CORE \
"ldr x4, [%2], #8 \n\t" \
"ldr x5, [%1] \n\t" \
"mul x6, x4, %3 \n\t" \
"umulh x7, x4, %3 \n\t" \
"mul x6, x4, %4 \n\t" \
"umulh x7, x4, %4 \n\t" \
"adds x5, x5, x6 \n\t" \
"adc x7, x7, xzr \n\t" \
"adds x5, x5, %0 \n\t" \
"adc %0, x7, xzr \n\t" \
"str x5, [%1], #8 \n\t"
#define MULADDC_STOP \
: "+r" (c), "+r" (d), "+r" (s) \
: "r" (b) \
: "x4", "x5", "x6", "x7", "cc" \
#define MULADDC_STOP \
: "+r" (c), "+r" (d), "+r" (s), "+m" (*(uint64_t (*)[16]) d) \
: "r" (b), "m" (*(const uint64_t (*)[16]) s) \
: "x4", "x5", "x6", "x7", "cc" \
);
#endif /* Aarch64 */