Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-22 21:58:57 +03:00
Code Issues Actions 6 Packages Projects Releases Wiki Activity

ppcdrc.c: Split up dword-aligned 64-bit accesses to 32-bits. (nw)

Browse Source
This commit is contained in:
Ville Linde 2012-07-23 14:25:55 +00:00
parent e8ec2f32c4
commit 3df3a4a2b2
1 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
src/emu/cpu/powerpc/ppcdrc.c
View File

@ -1486,6 +1486,10 @@ static void static_generate_memory_accessor(powerpc_state *ppc, int mode, int si
{
UML_TEST(block, I0, 3); // test i0,3
UML_JMPc(block, COND_NZ, alignex = label++); // jmp alignex,nz
/* word aligned accesses need to be broken up */
UML_TEST(block, I0, 4); // test i0,4
UML_JMPc(block, COND_NZ, unaligned = label++); // jmp unaligned, nz
}
/* unaligned 2 and 4 byte accesses need to be broken up */
@ -1770,6 +1774,26 @@ static void static_generate_memory_accessor(powerpc_state *ppc, int mode, int si
UML_OR(block, I0, I0, mem(&ppc->impstate->tempdata.w.l)); // or i0,i0,[tempdata]
}
}
else if (size == 8)
{
if (iswrite)
{
UML_DMOV(block, I3, I1); // dmov i3,i1
UML_DSHR(block, I1, I1, 32); // dshr i1,i1,32
UML_WRITE(block, I0, I1, SIZE_DWORD, SPACE_PROGRAM); // write i0,i1,program_dword
UML_ADD(block, I0, I0, 4); // add i0,i0,4
UML_WRITE(block, I0, I3, SIZE_DWORD, SPACE_PROGRAM); // write i0,i3,program_dword
}
else
{
UML_XOR(block, I3, I3, I3); // xor i3,i3,i3
UML_READ(block, I1, I0, SIZE_DWORD, SPACE_PROGRAM); // read i1,i0,program_dword
UML_ADD(block, I0, I0, 4); // add i0,i0,4
UML_READ(block, I3, I0, SIZE_DWORD, SPACE_PROGRAM); // read i3,i0,program_dword
UML_DSHL(block, I1, I1, 32); // dshl i1,i1,32
UML_DOR(block, I0, I1, I3); // dor i0,i1,i3
}
}
UML_RET(block); // ret
}