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PowerPC64 support for add and sub with overflow check #921

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PowerPC64 support for add and sub with overflow check #921

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60 changes: 60 additions & 0 deletions Zend/zend_operators.h
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Original file line number Diff line number Diff line change
Expand Up @@ -494,6 +494,36 @@ static zend_always_inline int fast_add_function(zval *result, zval *op1, zval *o
"n"(IS_DOUBLE),
"n"(ZVAL_OFFSETOF_TYPE)
: "rax","cc");
#elif defined(__GNUC__) && defined(__powerpc64__)
__asm__(
"ld 14, 0(%1)\n\t"
"ld 15, 0(%2)\n\t"
"li 16, 0 \n\t"
"mtxer 16\n\t"
"addo. 14, 14, 15\n\t"
"bso- 0f\n\t"
"std 14, 0(%0)\n\t"
"li 14, %3\n\t"
"stw 14, %c5(%0)\n\t"
"b 1f\n"
"0:\n\t"
"lfd 0, 0(%1)\n\t"
"lfd 1, 0(%2)\n\t"
"fcfid 0, 0\n\t"
"fcfid 1, 1\n\t"
"fadd 0, 0, 1\n\t"
"li 14, %4\n\t"
"stw 14, %c5(%0)\n\t"
"stfd 0, 0(%0)\n"
"1:"
:
: "r"(&result->value),
"r"(&op1->value),
"r"(&op2->value),
"n"(IS_LONG),
"n"(IS_DOUBLE),
"n"(ZVAL_OFFSETOF_TYPE)
: "r14","r15","r16","fr0","fr1","cc");
#else
/*
* 'result' may alias with op1 or op2, so we need to
Expand Down Expand Up @@ -583,6 +613,36 @@ static zend_always_inline int fast_sub_function(zval *result, zval *op1, zval *o
"n"(IS_DOUBLE),
"n"(ZVAL_OFFSETOF_TYPE)
: "rax","cc");
#elif defined(__GNUC__) && defined(__powerpc64__)
__asm__(
"ld 14, 0(%1)\n\t"
"ld 15, 0(%2)\n\t"
"li 16, 0\n\t"
"mtxer 16\n\t"
"subo. 14, 14, 15\n\t"
"bso- 0f\n\t"
"std 14, 0(%0)\n\t"
"li 14, %3\n\t"
"stw 14, %c5(%0)\n\t"
"b 1f\n"
"0:\n\t"
"lfd 0, 0(%1)\n\t"
"lfd 1, 0(%2)\n\t"
"fcfid 0, 0\n\t"
"fcfid 1, 1\n\t"
"fsub 0, 0, 1\n\t"
"li 14, %4\n\t"
"stw 14, %c5(%0)\n\t"
"stfd 0, 0(%0)\n"
"1:"
:
: "r"(&result->value),
"r"(&op1->value),
"r"(&op2->value),
"n"(IS_LONG),
"n"(IS_DOUBLE),
"n"(ZVAL_OFFSETOF_TYPE)
: "r14","r15","r16","fr0","fr1","cc");
#else
ZVAL_LONG(result, Z_LVAL_P(op1) - Z_LVAL_P(op2));

Expand Down