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py: Use unsigned comparison of chars. 

On x86 chars are signed, but we're comparing a char to '0' + unsigned int,
which is promoted to an unsigned int. Let's promote the char to unsigned
before doing the comparison to avoid weird corner cases.
This commit is contained in:
Emil Renner Berthing 2020-10-03 10:51:59 +02:00
parent 6d3aa16443
commit fdd6fa389e
2 changed files with 2 additions and 2 deletions
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2
py/emitinlinethumb.c
View File

@ -108,7 +108,7 @@ STATIC mp_uint_t emit_inline_thumb_count_params(emit_inline_asm_t *emit, mp_uint
return 0;
}
const char *p = qstr_str(MP_PARSE_NODE_LEAF_ARG(pn_params[i]));
if (!(strlen(p) == 2 && p[0] == 'r' && p[1] == '0' + i)) {
if (!(strlen(p) == 2 && p[0] == 'r' && (mp_uint_t)p[1] == '0' + i)) {
emit_inline_thumb_error_msg(emit, MP_ERROR_TEXT("parameters must be registers in sequence r0 to r3"));
return 0;
}

2
py/emitinlinextensa.c
View File

@ -92,7 +92,7 @@ STATIC mp_uint_t emit_inline_xtensa_count_params(emit_inline_asm_t *emit, mp_uin
return 0;
}
const char *p = qstr_str(MP_PARSE_NODE_LEAF_ARG(pn_params[i]));
if (!(strlen(p) == 2 && p[0] == 'a' && p[1] == '2' + i)) {
if (!(strlen(p) == 2 && p[0] == 'a' && (mp_uint_t)p[1] == '2' + i)) {
emit_inline_xtensa_error_msg(emit, MP_ERROR_TEXT("parameters must be registers in sequence a2 to a5"));
return 0;
}