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Updated functions to deal with USB clocking. (PPL1) See http://www.nxp.com/documents/user_manual/UM10360.pdf Section 4.6 & 4.7.3
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Diff: CoreMark/core_state.c
- Revision:
- 0:b5d3bd64d2dc
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/CoreMark/core_state.c Sun Jan 24 15:46:26 2010 +0000 @@ -0,0 +1,277 @@ +/* +Author : Shay Gal-On, EEMBC + +This file is part of EEMBC(R) and CoreMark(TM), which are Copyright (C) 2009 +All rights reserved. + +EEMBC CoreMark Software is a product of EEMBC and is provided under the terms of the +CoreMark License that is distributed with the official EEMBC COREMARK Software release. +If you received this EEMBC CoreMark Software without the accompanying CoreMark License, +you must discontinue use and download the official release from www.coremark.org. + +Also, if you are publicly displaying scores generated from the EEMBC CoreMark software, +make sure that you are in compliance with Run and Reporting rules specified in the accompanying readme.txt file. + +EEMBC +4354 Town Center Blvd. Suite 114-200 +El Dorado Hills, CA, 95762 +*/ +#include "coremark.h" +/* local functions */ +enum CORE_STATE core_state_transition( ee_u8 **instr , ee_u32 *transition_count); + +/* +Topic: Description + Simple state machines like this one are used in many embedded products. + + For more complex state machines, sometimes a state transition table implementation is used instead, + trading speed of direct coding for ease of maintenance. + + Since the main goal of using a state machine in CoreMark is to excercise the switch/if behaviour, + we are using a small moore machine. + + In particular, this machine tests type of string input, + trying to determine whether the input is a number or something else. + (see core_state.png). +*/ + +/* Function: core_bench_state + Benchmark function + + Go over the input twice, once direct, and once after introducing some corruption. +*/ +ee_u16 core_bench_state(ee_u32 blksize, ee_u8 *memblock, + ee_s16 seed1, ee_s16 seed2, ee_s16 step, ee_u16 crc) +{ + ee_u32 final_counts[NUM_CORE_STATES]; + ee_u32 track_counts[NUM_CORE_STATES]; + ee_u8 *p=memblock; + ee_u32 i; + + +#if CORE_DEBUG + ee_printf("State Bench: %d,%d,%d,%04x\n",seed1,seed2,step,crc); +#endif + for (i=0; i<NUM_CORE_STATES; i++) { + final_counts[i]=track_counts[i]=0; + } + /* run the state machine over the input */ + while (*p!=0) { + enum CORE_STATE fstate=core_state_transition(&p,track_counts); + final_counts[fstate]++; +#if CORE_DEBUG + ee_printf("%d,",fstate); + } + ee_printf("\n"); +#else + } +#endif + p=memblock; + while (p < (memblock+blksize)) { /* insert some corruption */ + if (*p!=',') + *p^=(ee_u8)seed1; + p+=step; + } + p=memblock; + /* run the state machine over the input again */ + while (*p!=0) { + enum CORE_STATE fstate=core_state_transition(&p,track_counts); + final_counts[fstate]++; +#if CORE_DEBUG + ee_printf("%d,",fstate); + } + ee_printf("\n"); +#else + } +#endif + p=memblock; + while (p < (memblock+blksize)) { /* undo corruption is seed1 and seed2 are equal */ + if (*p!=',') + *p^=(ee_u8)seed2; + p+=step; + } + /* end timing */ + for (i=0; i<NUM_CORE_STATES; i++) { + crc=crcu32(final_counts[i],crc); + crc=crcu32(track_counts[i],crc); + } + return crc; +} + +/* Default initialization patterns */ +static ee_u8 *intpat[4] ={(ee_u8 *)"5012",(ee_u8 *)"1234",(ee_u8 *)"-874",(ee_u8 *)"+122"}; +static ee_u8 *floatpat[4]={(ee_u8 *)"35.54400",(ee_u8 *)".1234500",(ee_u8 *)"-110.700",(ee_u8 *)"+0.64400"}; +static ee_u8 *scipat[4] ={(ee_u8 *)"5.500e+3",(ee_u8 *)"-.123e-2",(ee_u8 *)"-87e+832",(ee_u8 *)"+0.6e-12"}; +static ee_u8 *errpat[4] ={(ee_u8 *)"T0.3e-1F",(ee_u8 *)"-T.T++Tq",(ee_u8 *)"1T3.4e4z",(ee_u8 *)"34.0e-T^"}; + +/* Function: core_init_state + Initialize the input data for the state machine. + + Populate the input with several predetermined strings, interspersed. + Actual patterns chosen depend on the seed parameter. + + Note: + The seed parameter MUST be supplied from a source that cannot be determined at compile time +*/ +void core_init_state(ee_u32 size, ee_s16 seed, ee_u8 *p) { + ee_u32 total=0,next=0,i; + ee_u8 *buf=0; +#if CORE_DEBUG + ee_u8 *start=p; + ee_printf("State: %d,%d\n",size,seed); +#endif + size--; + next=0; + while ((total+next+1)<size) { + if (next>0) { + for(i=0;i<next;i++) + *(p+total+i)=buf[i]; + *(p+total+i)=','; + total+=next+1; + } + seed++; + switch (seed & 0x7) { + case 0: /* int */ + case 1: /* int */ + case 2: /* int */ + buf=intpat[(seed>>3) & 0x3]; + next=4; + break; + case 3: /* float */ + case 4: /* float */ + buf=floatpat[(seed>>3) & 0x3]; + next=8; + break; + case 5: /* scientific */ + case 6: /* scientific */ + buf=scipat[(seed>>3) & 0x3]; + next=8; + break; + case 7: /* invalid */ + buf=errpat[(seed>>3) & 0x3]; + next=8; + break; + default: /* Never happen, just to make some compilers happy */ + break; + } + } + size++; + while (total<size) { /* fill the rest with 0 */ + *(p+total)=0; + total++; + } +#if CORE_DEBUG + ee_printf("State Input: %s\n",start); +#endif +} + +static ee_u8 ee_isdigit(ee_u8 c) { + ee_u8 retval; + retval = ((c>='0') & (c<='9')) ? 1 : 0; + return retval; +} + +/* Function: core_state_transition + Actual state machine. + + The state machine will continue scanning until either: + 1 - an invalid input is detcted. + 2 - a valid number has been detected. + + The input pointer is updated to point to the end of the token, and the end state is returned (either specific format determined or invalid). +*/ + +enum CORE_STATE core_state_transition( ee_u8 **instr , ee_u32 *transition_count) { + ee_u8 *str=*instr; + ee_u8 NEXT_SYMBOL; + enum CORE_STATE state=CORE_START; + for( ; *str && state != CORE_INVALID; str++ ) { + NEXT_SYMBOL = *str; + if (NEXT_SYMBOL==',') /* end of this input */ { + str++; + break; + } + switch(state) { + case CORE_START: + if(ee_isdigit(NEXT_SYMBOL)) { + state = CORE_INT; + } + else if( NEXT_SYMBOL == '+' || NEXT_SYMBOL == '-' ) { + state = CORE_S1; + } + else if( NEXT_SYMBOL == '.' ) { + state = CORE_FLOAT; + } + else { + state = CORE_INVALID; + transition_count[CORE_INVALID]++; + } + transition_count[CORE_START]++; + break; + case CORE_S1: + if(ee_isdigit(NEXT_SYMBOL)) { + state = CORE_INT; + transition_count[CORE_S1]++; + } + else if( NEXT_SYMBOL == '.' ) { + state = CORE_FLOAT; + transition_count[CORE_S1]++; + } + else { + state = CORE_INVALID; + transition_count[CORE_S1]++; + } + break; + case CORE_INT: + if( NEXT_SYMBOL == '.' ) { + state = CORE_FLOAT; + transition_count[CORE_INT]++; + } + else if(!ee_isdigit(NEXT_SYMBOL)) { + state = CORE_INVALID; + transition_count[CORE_INT]++; + } + break; + case CORE_FLOAT: + if( NEXT_SYMBOL == 'E' || NEXT_SYMBOL == 'e' ) { + state = CORE_S2; + transition_count[CORE_FLOAT]++; + } + else if(!ee_isdigit(NEXT_SYMBOL)) { + state = CORE_INVALID; + transition_count[CORE_FLOAT]++; + } + break; + case CORE_S2: + if( NEXT_SYMBOL == '+' || NEXT_SYMBOL == '-' ) { + state = CORE_EXPONENT; + transition_count[CORE_S2]++; + } + else { + state = CORE_INVALID; + transition_count[CORE_S2]++; + } + break; + case CORE_EXPONENT: + if(ee_isdigit(NEXT_SYMBOL)) { + state = CORE_SCIENTIFIC; + transition_count[CORE_EXPONENT]++; + } + else { + state = CORE_INVALID; + transition_count[CORE_EXPONENT]++; + } + break; + case CORE_SCIENTIFIC: + if(!ee_isdigit(NEXT_SYMBOL)) { + state = CORE_INVALID; + transition_count[CORE_INVALID]++; + } + break; + default: + break; + } + } + *instr=str; + return state; +}