Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-29 09:03:08 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

PowerPC: further DIVW improvements [R. Belmont]

Browse Source
This commit is contained in:
R. Belmont 2012-03-11 18:52:31 +00:00
parent 1729f642bc
commit b8f9903801
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/emu/cpu/powerpc/ppcdrc.c
View File

@ -2237,7 +2237,7 @@ static void generate_compute_flags(powerpc_state *ppc, drcuml_block *block, cons
{
UML_GETFLGS(block, I0, FLAG_S | FLAG_Z); // getflgs i0,sz
UML_LOAD(block, I0, ppc->impstate->sz_cr_table, I0, SIZE_BYTE, SCALE_x1); // load i0,sz_cr_table,i0,byte
UML_OR(block, CR32(0), I0, XERSO32); // or [cr0],i0,[xerso]
UML_OR(block, CR32(0), I0, XERSO32); // or [cr0],i0,[xerso]
return;
}
@ -3078,10 +3078,10 @@ static int generate_instruction_1f(powerpc_state *ppc, drcuml_block *block, comp
UML_CMP(block, R32(G_RA(op)), 0x80000000); // cmp rb, #80000000
UML_JMPc(block, COND_AE, compiler->labelnum); // bae 0:
UML_MOV(block, R32(G_RD(op)), 0x0); // move rd, #0
UML_MOV(block, I0, 0x0); // move i0, #0 (generate_flags needs result in i0)
if (op & M_OE)
{
UML_OR(block, XERSO32, XERSO32, 0x1); // SO = 1
UML_OR(block, XERSO32, XERSO32, 0x1); // SO |= 1
}
UML_JMP(block, compiler->labelnum+3); // jmp 3:
@ -3097,18 +3097,19 @@ static int generate_instruction_1f(powerpc_state *ppc, drcuml_block *block, comp
UML_LABEL(block, compiler->labelnum++); // 1:
// do second branch
UML_MOV(block, R32(G_RD(op)), 0xffffffff); // move rd, #ffffffff
UML_MOV(block, I0, 0xffffffff); // move i0, #ffffffff (generate_flags needs result in i0)
if (op & M_OE)
{
UML_OR(block, XERSO32, XERSO32, 0x1); // SO = 1
UML_OR(block, XERSO32, XERSO32, 0x1); // SO |= 1
}
UML_JMP(block, compiler->labelnum+1); // jmp 3:
UML_LABEL(block, compiler->labelnum++); // 2:
UML_DIVS(block, R32(G_RD(op)), R32(G_RD(op)), R32(G_RA(op)), R32(G_RB(op))); // divs rd,rd,ra,rb
generate_compute_flags(ppc, block, desc, op & M_RC, ((op & M_OE) ? XER_OV : 0), FALSE);// <update flags>
UML_DIVS(block, I0, R32(G_RD(op)), R32(G_RA(op)), R32(G_RB(op))); // divs rd,rd,ra,rb
UML_LABEL(block, compiler->labelnum++); // 3:
UML_MOV(block, R32(G_RD(op)), I0); // mov rd, I0
generate_compute_flags(ppc, block, desc, op & M_RC, ((op & M_OE) ? XER_OV : 0), FALSE);// <update flags>
return TRUE;
case 0x01c: /* ANDx */