diff options
| author | Bastian Koppelmann <kbastian@mail.uni-paderborn.de> | 2014-09-01 13:00:00 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-09-01 14:49:21 +0100 |
| commit | 44ea34309e38ce1bcb7d2c8816c6b0baaee7979c (patch) | |
| tree | 1a5afccfb91338b3e458114f2f5847afb7447518 /target-tricore/op_helper.c | |
| parent | 5a7634a28c3d30fec53df9cbd27e0317679e78c9 (diff) | |
target-tricore: Add instructions of SR opcode format
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>
Diffstat (limited to 'target-tricore/op_helper.c')
| -rw-r--r-- | target-tricore/op_helper.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/target-tricore/op_helper.c b/target-tricore/op_helper.c index bb55a4991a..6376f074e5 100644 --- a/target-tricore/op_helper.c +++ b/target-tricore/op_helper.c @@ -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, |