diff options
| -rw-r--r-- | target/sh4/translate.c | 2 | ||||
| -rw-r--r-- | tests/tcg/sh4/Makefile.target | 3 | ||||
| -rw-r--r-- | tests/tcg/sh4/test-subv.c | 30 |
3 files changed, 34 insertions, 1 deletions
diff --git a/target/sh4/translate.c b/target/sh4/translate.c index d8dcfc3a20..5c0a4cce7a 100644 --- a/target/sh4/translate.c +++ b/target/sh4/translate.c @@ -934,7 +934,7 @@ static void _decode_opc(DisasContext * ctx) t0 = tcg_temp_new(); tcg_gen_sub_i32(t0, REG(B11_8), REG(B7_4)); t1 = tcg_temp_new(); - tcg_gen_xor_i32(t1, t0, REG(B7_4)); + tcg_gen_xor_i32(t1, t0, REG(B11_8)); t2 = tcg_temp_new(); tcg_gen_xor_i32(t2, REG(B11_8), REG(B7_4)); tcg_gen_and_i32(t1, t1, t2); diff --git a/tests/tcg/sh4/Makefile.target b/tests/tcg/sh4/Makefile.target index 39751c41b2..a523a0d2c8 100644 --- a/tests/tcg/sh4/Makefile.target +++ b/tests/tcg/sh4/Makefile.target @@ -23,3 +23,6 @@ TESTS += test-macw test-addv: CFLAGS += -O -g TESTS += test-addv + +test-subv: CFLAGS += -O -g +TESTS += test-subv diff --git a/tests/tcg/sh4/test-subv.c b/tests/tcg/sh4/test-subv.c new file mode 100644 index 0000000000..a3c2db96e4 --- /dev/null +++ b/tests/tcg/sh4/test-subv.c @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> + +static void subv(const int a, const int b, const int res, const int carry) +{ + int o = a, c; + + asm volatile("subv %2,%0\n" + "movt %1\n" + : "+r"(o), "=r"(c) : "r"(b) : ); + + if (c != carry || o != res) { + printf("SUBV %d, %d = %d/%d [T = %d/%d]\n", a, b, o, res, c, carry); + abort(); + } +} + +int main(void) +{ + subv(INT_MIN, 1, INT_MAX, 1); + subv(INT_MAX, -1, INT_MIN, 1); + subv(INT_MAX, 1, INT_MAX - 1, 0); + subv(0, 1, -1, 0); + subv(-1, -1, 0, 0); + + return 0; +} |