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tcg: Minor adjustments to deposit expanders 

Assert that len is not 0.

Since we have asserted that ofs + len <= N, a later
check for len == N implies that ofs == 0.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2016-10-14 17:26:38 -05:00
parent 7ec8bab3de
commit 0d0d309df0
1 changed files with 4 additions and 2 deletions
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6
tcg/tcg-op.c
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@ -533,10 +533,11 @@ void tcg_gen_deposit_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2,
TCGv_i32 t1;
tcg_debug_assert(ofs < 32);
tcg_debug_assert(len > 0);
tcg_debug_assert(len <= 32);
tcg_debug_assert(ofs + len <= 32);
if (ofs == 0 && len == 32) {
if (len == 32) {
tcg_gen_mov_i32(ret, arg2);
return;
}
@ -1718,10 +1719,11 @@ void tcg_gen_deposit_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2,
TCGv_i64 t1;
tcg_debug_assert(ofs < 64);
tcg_debug_assert(len > 0);
tcg_debug_assert(len <= 64);
tcg_debug_assert(ofs + len <= 64);
if (ofs == 0 && len == 64) {
if (len == 64) {
tcg_gen_mov_i64(ret, arg2);
return;
}