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Fixed irq.c instr decoder for compressed isa

This commit is contained in:
Clifford Wolf 2016-05-31 16:57:45 +02:00
parent 30e815d104
commit d72b25993c
1 changed files with 15 additions and 3 deletions
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18
firmware/irq.c
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@ -30,15 +30,27 @@ uint32_t *irq(uint32_t *regs, uint32_t irqs)
if ((irqs & 6) != 0) if ((irqs & 6) != 0)
{ {
uint32_t pc = regs[0] - 4; uint32_t pc = regs[0] - 2;
uint16_t *instr_hwords = (uint16_t*)pc; uint16_t *instr_hwords = (uint16_t*)pc;
uint32_t instr = instr_hwords[0] | (instr_hwords[1] << 16); uint32_t instr = *(uint16_t*)pc;
if ((*instr_hwords & 3) == 3) {
pc -= 2;
instr = (instr << 16) | *(uint16_t*)pc;
} else {
int cnt_3 = 0;
while ((*(--instr_hwords) & 3) == 3 && cnt_3 < 20) cnt_3++;
if ((cnt_3 & 1) != 0) {
pc -= 2;
instr = (instr << 16) | *(uint16_t*)pc;
}
}
print_str("\n"); print_str("\n");
print_str("------------------------------------------------------------\n"); print_str("------------------------------------------------------------\n");
if ((irqs & 2) != 0) { if ((irqs & 2) != 0) {
if (instr == 0x00100073 || (instr & 0xffff) == 9002) { if (instr == 0x00100073 || instr == 0x9002) {
print_str("SBREAK instruction at 0x"); print_str("SBREAK instruction at 0x");
print_hex(pc, 8); print_hex(pc, 8);
print_str("\n"); print_str("\n");