URL
https://opencores.org/ocsvn/zipcpu/zipcpu/trunk
Subversion Repositories zipcpu
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- This comparison shows the changes necessary to convert path
/zipcpu/trunk/sw
- from Rev 104 to Rev 105
- ↔ Reverse comparison
Rev 104 → Rev 105
/zasm/test.S
77,6 → 77,7
sys.bus.ustl equ 0x00f |
#define DO_TEST_ASSEMBLER |
#define LJMP_TEST |
#define EARLY_BRANCH_TEST |
#define BREAK_TEST |
#define OVERFLOW_TEST |
#define CARRY_TEST |
241,6 → 242,18
#endif /* and after endif */ |
|
#ifdef LJMP_TEST |
// A long jump is a 32-bit instruction followed by a 32-bit address. |
// The CPU is supposed to jump to this address. At issue in this test, |
// which can only really be verified by watching it in person currently, |
// is how fast this branch can take place. Currently, it takes four |
// clocks--not that bad. |
// |
// Although really long jumps, we also test some of our early branching |
// forms here as well: |
// 1. Add to PC |
// 2. LOD (PC),PC (the long jump itself) |
// 3. LDI x,PC // An early branch target not tested elsewhere |
// |
CLR R0 |
CLR R1 |
LJMP |
270,6 → 283,77
CMP 4,R0 |
BNZ test_failure |
#endif |
#ifdef EARLY_BRANCH_TEST |
// Unlike the previous test, this test is going to see whether or not |
// early branching messes with the pipeline. |
BRA eb_a |
BUSY |
eb_a: |
BRA eb_b |
NOP |
BUSY |
eb_b: |
BRA eb_c |
NOP |
NOP |
BUSY |
eb_c: |
BRA eb_d |
NOP |
NOP |
NOP |
BUSY |
eb_d: |
BRA eb_e |
NOP |
NOP |
NOP |
NOP |
BUSY |
eb_e: |
NOOP |
// Only problem is, I don't expect it to mess with the pipeline unless |
// the pipeline is full. Therefore we are interested in something which |
// is not an early branch, conflicting with early branches. So let's |
// try loading our pipeline in all kinds of different configurations, |
// just to see which if the conditional branch always annihilates the |
// early branch as desired. |
// |
CLR R0 |
BZ ebz_a |
BUSY |
ebz_a: |
BZ ebz_b |
NOP |
BUSY |
ebz_b: |
BZ ebz_c |
NOP |
NOP |
BUSY |
// Let's repeat that last test, just in case the cache reloaded itself |
// in the middle and we didn't get our proper test. |
ebz_c: |
BZ ebz_d |
NOP |
NOP |
BUSY |
ebz_d: |
BZ ebz_e |
NOP |
NOP |
NOP |
BUSY |
ebz_e: |
BZ ebz_f |
NOP |
NOP |
NOP |
NOP |
BUSY |
ebz_f: |
NOOP |
#endif |
|
#ifdef BREAK_TEST |
breaktest: |