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PowerPC64 support for operators with overflow check

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This adds fast architecture-specific implementations of
the following functions for the ppc64:

* fast_increment_function
* fast_decrement_function
This commit is contained in:
Gustavo Frederico Temple Pedrosa 2014-12-11 17:48:41 +00:00 • committed by Remi Collet
parent 14e29f5146
commit fd045c7021
1 changed files with 54 additions and 0 deletions
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54
Zend/zend_operators.h
View file

@ -443,6 +443,33 @@ static zend_always_inline int fast_increment_function(zval *op1)
"n"(IS_DOUBLE),
"n"(ZVAL_OFFSETOF_TYPE)
: "cc");
#elif defined(__GNUC__) && defined(__powerpc64__)
__asm__(
"ld 14, 0(%0)\n\t"
"li 15, 1\n\t"
"li 16, 0\n\t"
"mtxer 16\n\t"
"addo. 14, 14, 15\n\t"
"std 14, 0(%0)\n\t"
"bns+ 0f\n\t"
"xor 14, 14, 14\n\t"
"lis 15, 0x43e00000@h\n\t"
"ori 15, 15, 0x43e00000@l\n\t"
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
"stw 14, 0(%0)\n\t"
"stw 15, 0x4(%0)\n\t"
#else
"stw 14, 0x4(%0)\n\t"
"stw 15, 0(%0)\n\t"
#endif
"li 14, %1\n\t"
"stw 14, %c2(%0)\n"
"0:"
:
: "r"(&op1->value),
"n"(IS_DOUBLE),
"n"(ZVAL_OFFSETOF_TYPE)
: "r14", "r15", "r16", "cc");
#else
if (UNEXPECTED(Z_LVAL_P(op1) == ZEND_LONG_MAX)) {
/* switch to double */
@ -485,6 +512,33 @@ static zend_always_inline int fast_decrement_function(zval *op1)
"n"(IS_DOUBLE),
"n"(ZVAL_OFFSETOF_TYPE)
: "cc");
#elif defined(__GNUC__) && defined(__powerpc64__)
__asm__(
"ld 14, 0(%0)\n\t"
"li 15, 1\n\t"
"li 16, 0\n\t"
"mtxer 16\n\t"
"subo. 14, 14, 15\n\t"
"std 14, 0(%0)\n\t"
"bns+ 0f\n\t"
"xor 14, 14, 14\n\t"
"lis 15, 0xc3e00000@h\n\t"
"ori 15, 15, 0xc3e00000@l\n\t"
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
"stw 14, 0(%0)\n\t"
"stw 15, 0x4(%0)\n\t"
#else
"stw 14, 0x4(%0)\n\t"
"stw 15, 0(%0)\n\t"
#endif
"li 14, %1\n\t"
"stw 14, %c2(%0)\n"
"0:"
:
: "r"(&op1->value),
"n"(IS_DOUBLE),
"n"(ZVAL_OFFSETOF_TYPE)
: "r14", "r15", "r16", "cc");
#else
if (UNEXPECTED(Z_LVAL_P(op1) == ZEND_LONG_MIN)) {
/* switch to double */