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Merge branch 'PHP-7.4'

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* PHP-7.4:
  speed up increment and decrement operators with overflow detection
This commit is contained in:
Dmitry Stogov 2019-05-07 15:42:25 +03:00
commit 40b2ffe201
1 changed files with 26 additions and 0 deletions
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26
Zend/zend_operators.h
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@ -490,6 +490,19 @@ overflow: ZEND_ATTRIBUTE_COLD_LABEL
return;
overflow: ZEND_ATTRIBUTE_COLD_LABEL
ZVAL_DOUBLE(op1, (double)ZEND_LONG_MAX + 1.0);
#elif defined(HAVE_ASM_GOTO) && defined(__aarch64__)
__asm__ goto (
"ldr x5, [%0]\n\t"
"adds x5, x5, 1\n\t"
"bvs %l1\n"
"str x5, [%0]"
:
: "r"(&op1->value)
: "x5", "cc", "memory"
: overflow);
return;
overflow: ZEND_ATTRIBUTE_COLD_LABEL
ZVAL_DOUBLE(op1, (double)ZEND_LONG_MAX + 1.0);
#elif PHP_HAVE_BUILTIN_SADDL_OVERFLOW && SIZEOF_LONG == SIZEOF_ZEND_LONG
long lresult;
if (UNEXPECTED(__builtin_saddl_overflow(Z_LVAL_P(op1), 1, &lresult))) {
@ -540,6 +553,19 @@ overflow: ZEND_ATTRIBUTE_COLD_LABEL
return;
overflow: ZEND_ATTRIBUTE_COLD_LABEL
ZVAL_DOUBLE(op1, (double)ZEND_LONG_MIN - 1.0);
#elif defined(HAVE_ASM_GOTO) && defined(__aarch64__)
__asm__ goto (
"ldr x5, [%0]\n\t"
"subs x5 ,x5, 1\n\t"
"bvs %l1\n"
"str x5, [%0]"
:
: "r"(&op1->value)
: "x5", "cc", "memory"
: overflow);
return;
overflow: ZEND_ATTRIBUTE_COLD_LABEL
ZVAL_DOUBLE(op1, (double)ZEND_LONG_MIN - 1.0);
#elif PHP_HAVE_BUILTIN_SSUBL_OVERFLOW && SIZEOF_LONG == SIZEOF_ZEND_LONG
long lresult;
if (UNEXPECTED(__builtin_ssubl_overflow(Z_LVAL_P(op1), 1, &lresult))) {