diff options
Diffstat (limited to 'gcc/config/aarch64/aarch64.c')
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 4189c6630a5..7ade6235dc2 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -1415,6 +1415,16 @@ aarch64_split_simd_move (rtx dst, rtx src) } } +bool +aarch64_zero_extend_const_eq (machine_mode xmode, rtx x, + machine_mode ymode, rtx y) +{ + rtx r = simplify_const_unary_operation (ZERO_EXTEND, xmode, y, ymode); + gcc_assert (r != NULL); + return rtx_equal_p (x, r); +} + + static rtx aarch64_force_temporary (machine_mode mode, rtx x, rtx value) { @@ -3915,6 +3925,13 @@ aarch64_select_cc_mode (RTX_CODE code, rtx x, rtx y) return ((code == GT || code == GE || code == LE || code == LT) ? CC_SESWPmode : CC_ZESWPmode); + /* A test for unsigned overflow. */ + if ((GET_MODE (x) == DImode || GET_MODE (x) == TImode) + && code == NE + && GET_CODE (x) == PLUS + && GET_CODE (y) == ZERO_EXTEND) + return CC_Cmode; + /* For everything else, return CCmode. */ return CCmode; } @@ -4065,6 +4082,15 @@ aarch64_get_condition_code_1 (enum machine_mode mode, enum rtx_code comp_code) } break; + case CC_Cmode: + switch (comp_code) + { + case NE: return AARCH64_CS; + case EQ: return AARCH64_CC; + default: return -1; + } + break; + default: return -1; break; |