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target/rx: Fix compiler errors for build with sanitizers 

gcc (Debian 10.2.1-6) 10.2.1 20210110 aborts builds with enabled sanitizers:

../../../target/rx/op_helper.c: In function ‘helper_scmpu’:
../../../target/rx/op_helper.c:213:24: error: ‘tmp1’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  213 |     env->psw_c = (tmp0 >= tmp1);
      |                  ~~~~~~^~~~~~~~
../../../target/rx/op_helper.c:213:24: error: ‘tmp0’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
../../../target/rx/op_helper.c: In function ‘helper_suntil’:
../../../target/rx/op_helper.c:299:23: error: ‘tmp’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  299 |     env->psw_c = (tmp <= env->regs[2]);
      |                  ~~~~~^~~~~~~~~~~~~~~~
../../../target/rx/op_helper.c: In function ‘helper_swhile’:
../../../target/rx/op_helper.c:318:23: error: ‘tmp’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  318 |     env->psw_c = (tmp <= env->regs[2]);
      |                  ~~~~~^~~~~~~~~~~~~~~~

Rewriting the code fixes those errors.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210128172127.46041-1-sw@weilnetz.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Stefan Weil 2021-01-28 18:21:27 +01:00 committed by Laurent Vivier
parent 0c373c0178
commit 77182df19f
1 changed files with 6 additions and 6 deletions
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12
target/rx/op_helper.c
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@ -201,14 +201,14 @@ void helper_scmpu(CPURXState *env)
if (env->regs[3] == 0) {
return;
}
while (env->regs[3] != 0) {
do {
tmp0 = cpu_ldub_data_ra(env, env->regs[1]++, GETPC());
tmp1 = cpu_ldub_data_ra(env, env->regs[2]++, GETPC());
env->regs[3]--;
if (tmp0 != tmp1 || tmp0 == '\0') {
break;
}
}
} while (env->regs[3] != 0);
env->psw_z = tmp0 - tmp1;
env->psw_c = (tmp0 >= tmp1);
}
@ -287,14 +287,14 @@ void helper_suntil(CPURXState *env, uint32_t sz)
if (env->regs[3] == 0) {
return ;
}
while (env->regs[3] != 0) {
do {
tmp = cpu_ldufn[sz](env, env->regs[1], GETPC());
env->regs[1] += 1 << sz;
env->regs[3]--;
if (tmp == env->regs[2]) {
break;
}
}
} while (env->regs[3] != 0);
env->psw_z = tmp - env->regs[2];
env->psw_c = (tmp <= env->regs[2]);
}
@ -306,14 +306,14 @@ void helper_swhile(CPURXState *env, uint32_t sz)
if (env->regs[3] == 0) {
return ;
}
while (env->regs[3] != 0) {
do {
tmp = cpu_ldufn[sz](env, env->regs[1], GETPC());
env->regs[1] += 1 << sz;
env->regs[3]--;
if (tmp != env->regs[2]) {
break;
}
}
} while (env->regs[3] != 0);
env->psw_z = env->regs[3];
env->psw_c = (tmp <= env->regs[2]);
}