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Use "lea" to add/sub register with constant

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Dmitry Stogov committed 2020-06-16 14:04:05 +03:00
1 parent a459799910
commit 77d0587fdb
1 file changed
+15
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ext/opcache/jit/zend_jit_x86.dasc
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@@ -3826,6 +3826,21 @@ static int zend_jit_math_long_long(dasm_State **Dst,
is_power_of_two(Z_LVAL_P(Z_ZV(op2_addr))))) {
| GET_ZVAL_LVAL result_reg, op1_addr
| shr Ra(result_reg), floor_log2(Z_LVAL_P(Z_ZV(op2_addr)))
} else if (opcode == ZEND_ADD &&
!may_overflow &&
Z_MODE(op1_addr) == IS_REG &&
Z_MODE(op2_addr) == IS_CONST_ZVAL) {
| lea Ra(result_reg), [Ra(Z_REG(op1_addr))+Z_LVAL_P(Z_ZV(op2_addr))]
} else if (opcode == ZEND_ADD &&
!may_overflow &&
Z_MODE(op2_addr) == IS_REG &&
Z_MODE(op1_addr) == IS_CONST_ZVAL) {
| lea Ra(result_reg), [Ra(Z_REG(op2_addr))+Z_LVAL_P(Z_ZV(op1_addr))]
} else if (opcode == ZEND_SUB &&
!may_overflow &&
Z_MODE(op1_addr) == IS_REG &&
Z_MODE(op2_addr) == IS_CONST_ZVAL) {
| lea Ra(result_reg), [Ra(Z_REG(op1_addr))-Z_LVAL_P(Z_ZV(op2_addr))]
} else {
| GET_ZVAL_LVAL result_reg, op1_addr
if (same_ops && opcode != ZEND_DIV) {