__ j(not_zero, deferred->enter(), not_taken);
__ sar(ebx, kSmiTagSize);
__ shl(ebx, shift_value);
- __ lea(ecx, Operand(ebx, 0x40000000));
- __ test(ecx, Immediate(0x80000000));
- __ j(not_zero, deferred->enter(), not_taken);
+ // This is the Smi check for the shifted result.
+ // After signed subtraction of 0xc0000000, the valid
+ // Smis are positive.
+ __ cmp(ebx, 0xc0000000);
+ __ j(sign, deferred->enter(), not_taken);
// tag result and store it in TOS (eax)
ASSERT(kSmiTagSize == times_2); // adjust code if not the case
__ lea(eax, Operand(ebx, ebx, times_1, kSmiTag));
case Token::SHL:
__ shl(eax);
// Check that the *signed* result fits in a smi.
- __ lea(ecx, Operand(eax, 0x40000000));
- __ test(ecx, Immediate(0x80000000));
- __ j(not_zero, slow, not_taken);
+ __ cmp(eax, 0xc0000000);
+ __ j(sign, slow, not_taken);
break;
default:
UNREACHABLE();