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simplify mp check logic.

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This commit is contained in:
Kelvin Sherlock 2019-02-17 13:22:27 -05:00
parent 3c9a004a9e
commit 4e956a4e06
1 changed files with 24 additions and 18 deletions
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42
src/engine_c.c
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@ -428,34 +428,40 @@ int check_bp_breakpoints(word32 addr) {
int check_mp_breakpoints(word32 addr, word32 value, unsigned bytes, int in_page, int in_bank) {
byte *stat;
byte *stat1;
byte *stat2;
word32 wstat;
word32 mask = 0xffffff;
int i;
unsigned xbytes = bytes;
word32 xaddr = addr;
if (in_bank) mask = 0xffff;
if (in_page) mask = 0xff;
/* assumptions:
* bytes is 1-3, so no possibility of crossing multiple pags
* g_mp_breakpoints is in ascending order.
*/
while (bytes--) {
stat = GET_PAGE_INFO_WR(((addr) >> 8) & 0xffff);
wstat = PTR2WORD(stat) & 0xff;
if ((wstat & BANK_BREAK)) {
for (i = 0; i < g_num_mp_breakpoints; ++i) {
if (addr == g_mp_breakpoints[i]) {
g_abort_address = xaddr;
g_abort_bytes = xbytes;
mask = (1 << (xbytes << 3))-1;
word32 a1 = addr;
word32 a2 = addr + bytes - 1;
if (in_page) a1 = (a1 & 0x00ff) | (addr & 0xffff00);
if (in_bank) a1 = (a1 & 0xffff) | (addr & 0xff0000);
stat1 = GET_PAGE_INFO_WR(((a1) >> 8) & 0xffff);
stat2 = GET_PAGE_INFO_WR(((a2) >> 8) & 0xffff);
wstat = PTR2WORD(stat1) | PTR2WORD(stat2);
if (wstat & BANK_BREAK) {
for (i = 0; i < g_num_mp_breakpoints; ++i) {
word32 bp = g_mp_breakpoints[i];
if (a1 >= bp && a2 <= bp) {
g_abort_address = addr;
g_abort_bytes = bytes;
mask = (1 << (bytes << 3))-1;
g_abort_value = value & mask;
return 1;
}
return 1;
}
}
addr = ((addr + 1) & mask) | (addr & ~mask);
}
return 0;
}