folkert/KEK
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 1

micro opt

Browse source
This commit is contained in:
folkert van heusden 2023-03-27 21:12:30 +02:00
parent 2333f4b92d
commit 08362a2a20
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
cpu.cpp
View file

@ -403,13 +403,13 @@ gam_rc_t cpu::getGAMAddress(const uint8_t mode, const int reg, const word_mode_t
bool cpu::double_operand_instructions(const uint16_t instr)
{
const word_mode_t word_mode = instr & 0x8000 ? wm_byte : wm_word;
const uint8_t operation = (instr >> 12) & 7;
if (operation == 0b000)
return single_operand_instructions(instr);
const word_mode_t word_mode = instr & 0x8000 ? wm_byte : wm_word;
if (operation == 0b111) {
if (word_mode == wm_byte)
return false;
@ -464,6 +464,7 @@ bool cpu::double_operand_instructions(const uint16_t instr)
gam_rc_t g_src = getGAM(src_mode, src_reg, word_mode, rm_cur);
auto g_dst = getGAM(dst_mode, dst_reg, word_mode, rm_cur);
uint16_t result = (g_dst.value.value() & g_src.value.value()) & (word_mode == wm_byte ? 0xff : 0xffff);
setPSW_flags_nzv(result, word_mode);
@ -1551,8 +1552,7 @@ bool cpu::misc_operations(const uint16_t instr)
int dst_reg = instr & 7;
word_mode_t word_mode = wm_word;
setPC(getGAMAddress(dst_mode, dst_reg, word_mode).addr.value());
setPC(getGAMAddress(dst_mode, dst_reg, wm_word).addr.value());
return true;
}