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target-tricore: Add instructions of SR opcode format

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Add instructions of SR opcode format.
Add micro-op generator functions for saturate.
Add helper return from exception (rfe).

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-16-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Bastian Koppelmann 2014-09-01 13:00:00 +01:00 • committed by Peter Maydell
parent 5a7634a28c
commit 44ea34309e
3 changed files with 164 additions and 0 deletions
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52
target-tricore/op_helper.c
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@ -99,6 +99,21 @@ static int cdc_decrement(target_ulong *psw)
return 0;
}
static bool cdc_zero(target_ulong *psw)
{
int cdc = *psw & MASK_PSW_CDC;
/* Returns TRUE if PSW.CDC.COUNT == 0 or if PSW.CDC ==
7'b1111111, otherwise returns FALSE. */
if (cdc == 0x7f) {
return true;
}
/* find CDC.COUNT */
int lo = clo32((*psw & MASK_PSW_CDC) << (32 - 7));
int mask = (1u << (7 - lo)) - 1;
int count = *psw & mask;
return count == 0;
}
static void save_context_upper(CPUTriCoreState *env, int ea,
target_ulong *new_FCX)
{
@ -302,6 +317,43 @@ void helper_bisr(CPUTriCoreState *env, uint32_t const9)
}
}
void helper_rfe(CPUTriCoreState *env)
{
target_ulong ea;
target_ulong new_PCXI;
target_ulong new_PSW;
/* if (PCXI[19: 0] == 0) then trap(CSU); */
if ((env->PCXI & 0xfffff) == 0) {
/* raise csu trap */
}
/* if (PCXI.UL == 0) then trap(CTYP); */
if ((env->PCXI & MASK_PCXI_UL) == 0) {
/* raise CTYP trap */
}
/* if (!cdc_zero() AND PSW.CDE) then trap(NEST); */
if (!cdc_zero(&(env->PSW)) && (env->PSW & MASK_PSW_CDE)) {
/* raise MNG trap */
}
/* ICR.IE = PCXI.PIE; */
env->ICR = (env->ICR & ~MASK_ICR_IE) + ((env->PCXI & MASK_PCXI_PIE) >> 15);
/* ICR.CCPN = PCXI.PCPN; */
env->ICR = (env->ICR & ~MASK_ICR_CCPN) +
((env->PCXI & MASK_PCXI_PCPN) >> 24);
/*EA = {PCXI.PCXS, 6'b0, PCXI.PCXO, 6'b0};*/
ea = ((env->PCXI & MASK_PCXI_PCXS) << 12) +
((env->PCXI & MASK_PCXI_PCXO) << 6);
/*{new_PCXI, PSW, A[10], A[11], D[8], D[9], D[10], D[11], A[12],
A[13], A[14], A[15], D[12], D[13], D[14], D[15]} = M(EA, 16 * word);
M(EA, word) = FCX;*/
restore_context_upper(env, ea, &new_PCXI, &new_PSW);
/* FCX[19: 0] = PCXI[19: 0]; */
env->FCX = (env->FCX & 0xfff00000) + (env->PCXI & 0x000fffff);
/* PCXI = new_PCXI; */
env->PCXI = new_PCXI;
/* write psw */
psw_write(env, new_PSW);
}
static inline void QEMU_NORETURN do_raise_exception_err(CPUTriCoreState *env,
uint32_t exception,
int error_code,