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Update ARM inline assembly constraints.

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Inline assembly in uECC_vli_add is underspecified; the output
registers are written to before the input registers are fully
consumed. Updating the constraints to include earlyclobber `&`.
This commit is contained in:
prabhukr
2023-04-19 08:17:51 -07:00
parent 13721361f7
commit a029d90af0
1 changed files with 8 additions and 8 deletions
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16
asm_arm.inc
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@ -20,19 +20,19 @@
#endif
#if (uECC_PLATFORM == uECC_arm_thumb)
#define REG_RW "+l"
#define REG_WRITE "=l"
#define REG_RW "+&l"
#define REG_WRITE "=&l"
#else
#define REG_RW "+r"
#define REG_WRITE "=r"
#define REG_RW "+&r"
#define REG_WRITE "=&r"
#endif
#if (uECC_PLATFORM == uECC_arm_thumb || uECC_PLATFORM == uECC_arm_thumb2)
#define REG_RW_LO "+l"
#define REG_WRITE_LO "=l"
#define REG_RW_LO "+&l"
#define REG_WRITE_LO "=&l"
#else
#define REG_RW_LO "+r"
#define REG_WRITE_LO "=r"
#define REG_RW_LO "+&r"
#define REG_WRITE_LO "=&r"
#endif
#if (uECC_PLATFORM == uECC_arm_thumb2)