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target/arm: Restrict TCG specific helpers 

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20231130142519.28417-2-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2023-12-19 17:57:48 +00:00 committed by Peter Maydell
parent c36a0d577b
commit d1d119bbd7
2 changed files with 55 additions and 55 deletions
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55
target/arm/helper.c
View File

@ -10142,61 +10142,6 @@ void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask,
}
}
/* Sign/zero extend */
uint32_t HELPER(sxtb16)(uint32_t x)
{
uint32_t res;
res = (uint16_t)(int8_t)x;
res |= (uint32_t)(int8_t)(x >> 16) << 16;
return res;
}
static void handle_possible_div0_trap(CPUARMState *env, uintptr_t ra)
{
/*
* Take a division-by-zero exception if necessary; otherwise return
* to get the usual non-trapping division behaviour (result of 0)
*/
if (arm_feature(env, ARM_FEATURE_M)
&& (env->v7m.ccr[env->v7m.secure] & R_V7M_CCR_DIV_0_TRP_MASK)) {
raise_exception_ra(env, EXCP_DIVBYZERO, 0, 1, ra);
}
}
uint32_t HELPER(uxtb16)(uint32_t x)
{
uint32_t res;
res = (uint16_t)(uint8_t)x;
res |= (uint32_t)(uint8_t)(x >> 16) << 16;
return res;
}
int32_t HELPER(sdiv)(CPUARMState *env, int32_t num, int32_t den)
{
if (den == 0) {
handle_possible_div0_trap(env, GETPC());
return 0;
}
if (num == INT_MIN && den == -1) {
return INT_MIN;
}
return num / den;
}
uint32_t HELPER(udiv)(CPUARMState *env, uint32_t num, uint32_t den)
{
if (den == 0) {
handle_possible_div0_trap(env, GETPC());
return 0;
}
return num / den;
}
uint32_t HELPER(rbit)(uint32_t x)
{
return revbit32(x);
}
#ifdef CONFIG_USER_ONLY
static void switch_mode(CPUARMState *env, int mode)

55
target/arm/tcg/op_helper.c
View File

@ -121,6 +121,61 @@ void HELPER(v8m_stackcheck)(CPUARMState *env, uint32_t newvalue)
}
}
/* Sign/zero extend */
uint32_t HELPER(sxtb16)(uint32_t x)
{
uint32_t res;
res = (uint16_t)(int8_t)x;
res |= (uint32_t)(int8_t)(x >> 16) << 16;
return res;
}
static void handle_possible_div0_trap(CPUARMState *env, uintptr_t ra)
{
/*
* Take a division-by-zero exception if necessary; otherwise return
* to get the usual non-trapping division behaviour (result of 0)
*/
if (arm_feature(env, ARM_FEATURE_M)
&& (env->v7m.ccr[env->v7m.secure] & R_V7M_CCR_DIV_0_TRP_MASK)) {
raise_exception_ra(env, EXCP_DIVBYZERO, 0, 1, ra);
}
}
uint32_t HELPER(uxtb16)(uint32_t x)
{
uint32_t res;
res = (uint16_t)(uint8_t)x;
res |= (uint32_t)(uint8_t)(x >> 16) << 16;
return res;
}
int32_t HELPER(sdiv)(CPUARMState *env, int32_t num, int32_t den)
{
if (den == 0) {
handle_possible_div0_trap(env, GETPC());
return 0;
}
if (num == INT_MIN && den == -1) {
return INT_MIN;
}
return num / den;
}
uint32_t HELPER(udiv)(CPUARMState *env, uint32_t num, uint32_t den)
{
if (den == 0) {
handle_possible_div0_trap(env, GETPC());
return 0;
}
return num / den;
}
uint32_t HELPER(rbit)(uint32_t x)
{
return revbit32(x);
}
uint32_t HELPER(add_setq)(CPUARMState *env, uint32_t a, uint32_t b)
{
uint32_t res = a + b;