diff --git a/gcc/config/loongarch/loongarch-protos.h b/gcc/config/loongarch/loongarch-protos.h index 2144c2421ed..2287fd3763c 100644 --- a/gcc/config/loongarch/loongarch-protos.h +++ b/gcc/config/loongarch/loongarch-protos.h @@ -130,6 +130,7 @@ extern bool loongarch_symbol_binds_local_p (const_rtx); extern const char *current_section_name (void); extern unsigned int current_section_flags (void); extern bool loongarch_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT); +extern bool loongarch_check_zero_div_p (void); union loongarch_gen_fn_ptrs { diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc index 5c9a33c14f7..8b0d7f459e0 100644 --- a/gcc/config/loongarch/loongarch.cc +++ b/gcc/config/loongarch/loongarch.cc @@ -2110,7 +2110,7 @@ loongarch_load_store_insns (rtx mem, rtx_insn *insn) /* Return true if we need to trap on division by zero. */ -static bool +bool loongarch_check_zero_div_p (void) { /* if -m[no-]check-zero-division is given explicitly. */ diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md index 8f8412fba84..6bca2ed3993 100644 --- a/gcc/config/loongarch/loongarch.md +++ b/gcc/config/loongarch/loongarch.md @@ -110,6 +110,8 @@ ;; ;; .................... +(define_attr "enabled" "no,yes" (const_string "yes")) + (define_attr "got" "unset,load" (const_string "unset")) @@ -763,26 +765,36 @@ }) (define_insn "*3" - [(set (match_operand:GPR 0 "register_operand" "=&r") - (any_div:GPR (match_operand:GPR 1 "register_operand" "r") - (match_operand:GPR 2 "register_operand" "r")))] + [(set (match_operand:GPR 0 "register_operand" "=r,&r,&r") + (any_div:GPR (match_operand:GPR 1 "register_operand" "r,r,0") + (match_operand:GPR 2 "register_operand" "r,r,r")))] "" { return loongarch_output_division (".\t%0,%1,%2", operands); } [(set_attr "type" "idiv") - (set_attr "mode" "")]) + (set_attr "mode" "") + (set (attr "enabled") + (if_then_else + (match_test "!!which_alternative == loongarch_check_zero_div_p()") + (const_string "yes") + (const_string "no")))]) (define_insn "di3_fake" - [(set (match_operand:SI 0 "register_operand" "=&r") - (any_div:SI (match_operand:DI 1 "register_operand" "r") - (match_operand:DI 2 "register_operand" "r")))] + [(set (match_operand:SI 0 "register_operand" "=r,&r,&r") + (any_div:SI (match_operand:DI 1 "register_operand" "r,r,0") + (match_operand:DI 2 "register_operand" "r,r,r")))] "" { return loongarch_output_division (".w\t%0,%1,%2", operands); } [(set_attr "type" "idiv") - (set_attr "mode" "SI")]) + (set_attr "mode" "SI") + (set (attr "enabled") + (if_then_else + (match_test "!!which_alternative == loongarch_check_zero_div_p()") + (const_string "yes") + (const_string "no")))]) ;; Floating point multiply accumulate instructions. diff --git a/gcc/testsuite/gcc.target/loongarch/div-1.c b/gcc/testsuite/gcc.target/loongarch/div-1.c new file mode 100644 index 00000000000..b1683f8535f --- /dev/null +++ b/gcc/testsuite/gcc.target/loongarch/div-1.c @@ -0,0 +1,9 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mcheck-zero-division" } */ +/* { dg-final { scan-assembler "div.\[wd\]\t\\\$r4,\\\$r4,\\\$r5" } } */ + +long +div(long a, long b) +{ + return a / b; +} diff --git a/gcc/testsuite/gcc.target/loongarch/div-2.c b/gcc/testsuite/gcc.target/loongarch/div-2.c new file mode 100644 index 00000000000..4c2beb5b930 --- /dev/null +++ b/gcc/testsuite/gcc.target/loongarch/div-2.c @@ -0,0 +1,9 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mno-check-zero-division" } */ +/* { dg-final { scan-assembler "div.\[wd\]\t\\\$r4,\\\$r5,\\\$r4" } } */ + +long +div(long a, long b) +{ + return b / a; +} diff --git a/gcc/testsuite/gcc.target/loongarch/div-3.c b/gcc/testsuite/gcc.target/loongarch/div-3.c new file mode 100644 index 00000000000..d25969263f5 --- /dev/null +++ b/gcc/testsuite/gcc.target/loongarch/div-3.c @@ -0,0 +1,9 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mcheck-zero-division" } */ +/* { dg-final { scan-assembler-not "div.\[wd\]\t\\\$r4,\\\$r5,\\\$r4" } } */ + +long +div(long a, long b) +{ + return b / a; +}