diff options
Diffstat (limited to 'contrib/gcc/optabs.c')
| -rw-r--r-- | contrib/gcc/optabs.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/contrib/gcc/optabs.c b/contrib/gcc/optabs.c index d228e58..1cf2803 100644 --- a/contrib/gcc/optabs.c +++ b/contrib/gcc/optabs.c @@ -752,23 +752,18 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods) } /* In case the insn wants input operands in modes different from - the result, convert the operands. It would seem that we - don't need to convert CONST_INTs, but we do, so that they're - a properly sign-extended for their modes; we choose the - widest mode between mode and mode[01], so that, in a widening - operation, we call convert_modes with different FROM and TO - modes, which ensures the value is sign-extended. Shift - operations are an exception, because the second operand needs - not be extended to the mode of the result. */ + those of the actual operands, convert the operands. It would + seem that we don't need to convert CONST_INTs, but we do, so + that they're properly zero-extended or sign-extended for their + modes; shift operations are an exception, because the second + operand needs not be extended to the mode of the result. */ if (GET_MODE (op0) != mode0 && mode0 != VOIDmode) xop0 = convert_modes (mode0, GET_MODE (op0) != VOIDmode ? GET_MODE (op0) - : GET_MODE_SIZE (mode) > GET_MODE_SIZE (mode0) - ? mode - : mode0, + : mode, xop0, unsignedp); if (GET_MODE (xop1) != mode1 @@ -776,8 +771,7 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods) xop1 = convert_modes (mode1, GET_MODE (op1) != VOIDmode ? GET_MODE (op1) - : (GET_MODE_SIZE (mode) > GET_MODE_SIZE (mode1) - && ! shift_op) + : ! shift_op ? mode : mode1, xop1, unsignedp); |
