--- linux-user/main.c +++ linux-user/main.c @@ -339,18 +339,54 @@ { TaskState *ts = env->opaque; uint32_t opcode; + int rc; /* we handle the FPU emulation here, as Linux */ /* we get the opcode */ opcode = ldl_raw((uint8_t *)env->regs[15]); - if (EmulateAll(opcode, &ts->fpa, env->regs) == 0) { + if ((rc=EmulateAll(opcode, &ts->fpa, env->regs)) == 0) { /* illegal instruction */ info.si_signo = SIGILL; info.si_errno = 0; info.si_code = TARGET_ILL_ILLOPN; info._sifields._sigfault._addr = env->regs[15]; queue_signal(info.si_signo, &info); - } else { + } else if (rc < 0) { /* FP exception */ + int arm_fpe=0; + /* translate softfloat flags to FPSR flags */ + if(-rc & float_flag_invalid) arm_fpe |= BIT_IOC; + if(-rc & float_flag_divbyzero) arm_fpe |= BIT_DZC; + if(-rc & float_flag_overflow) arm_fpe |= BIT_OFC; + if(-rc & float_flag_underflow) arm_fpe |= BIT_UFC; + if(-rc & float_flag_inexact) arm_fpe |= BIT_IXC; + + FPSR fpsr = ts->fpa.fpsr; + //printf("fpsr 0x%x, arm_fpe 0x%x\n",fpsr,arm_fpe); + + if(fpsr & (arm_fpe << 16)) /* exception enabled? */ + { + info.si_signo = SIGFPE; + info.si_errno = 0; + /* ordered by priority, least first */ + if(arm_fpe & BIT_IXC) info.si_code = TARGET_FPE_FLTRES; + if(arm_fpe & BIT_UFC) info.si_code = TARGET_FPE_FLTUND; + if(arm_fpe & BIT_OFC) info.si_code = TARGET_FPE_FLTOVF; + if(arm_fpe & BIT_DZC) info.si_code = TARGET_FPE_FLTDIV; + if(arm_fpe & BIT_IOC) info.si_code = TARGET_FPE_FLTINV; + info._sifields._sigfault._addr = env->regs[15]; + queue_signal(info.si_signo, &info); + } + else + env->regs[15] += 4; + + /* accumulate unenabled exceptions */ + if((!(fpsr & BIT_IXE)) && (arm_fpe & BIT_IXC)) fpsr |= BIT_IXC; + if((!(fpsr & BIT_UFE)) && (arm_fpe & BIT_UFC)) fpsr |= BIT_UFC; + if((!(fpsr & BIT_OFE)) && (arm_fpe & BIT_OFC)) fpsr |= BIT_OFC; + if((!(fpsr & BIT_DZE)) && (arm_fpe & BIT_DZC)) fpsr |= BIT_DZC; + if((!(fpsr & BIT_IOE)) && (arm_fpe & BIT_IOC)) fpsr |= BIT_IOC; + ts->fpa.fpsr=fpsr; + } else { /* everything OK */ /* increment PC */ env->regs[15] += 4; } --- target-arm/nwfpe/fpa11.c +++ target-arm/nwfpe/fpa11.c @@ -161,6 +161,8 @@ fpa11->initflag = 1; } + set_float_exception_flags(0, &fpa11->fp_status); + if (TEST_OPCODE(opcode,MASK_CPRT)) { //fprintf(stderr,"emulating CPRT\n"); @@ -190,6 +192,11 @@ } // restore_flags(flags); + if(nRc == 1 && get_float_exception_flags(&fpa11->fp_status)) + { + //printf("fef 0x%x\n",float_exception_flags); + nRc=-get_float_exception_flags(&fpa11->fp_status); + } //printf("returning %d\n",nRc); return(nRc);