diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 16 |
1 files changed, 14 insertions, 2 deletions
@@ -1100,6 +1100,8 @@ convert_move (to, from, unsignedp) else { enum machine_mode intermediate; + rtx tmp; + tree shift_amount; /* Search for a mode to convert via. */ for (intermediate = from_mode; intermediate != VOIDmode; @@ -1116,8 +1118,18 @@ convert_move (to, from, unsignedp) return; } - /* No suitable intermediate mode. */ - abort (); + /* No suitable intermediate mode. + Generate what we need with shifts. */ + shift_amount = build_int_2 (GET_MODE_BITSIZE (to_mode) + - GET_MODE_BITSIZE (from_mode), 0); + from = gen_lowpart (to_mode, force_reg (from_mode, from)); + tmp = expand_shift (LSHIFT_EXPR, to_mode, from, shift_amount, + to, unsignedp); + tmp = expand_shift (RSHIFT_EXPR, to_mode, tmp, shift_amount, + to, unsignedp); + if (tmp != to) + emit_move_insn (to, tmp); + return; } } |