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ppcdrc: handle divide by zero (nw)

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This commit is contained in:
Ville Linde 2016-03-12 01:38:23 +02:00
parent 2bf46f72ed
commit a521d9a3cf
1 changed files with 13 additions and 1 deletions
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14
src/devices/cpu/powerpc/ppcdrc.cpp
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@ -3472,7 +3472,13 @@ int ppc_device::generate_instruction_3b(drcuml_block *block, compiler_state *com
case 0x12: /* FDIVSx */
if (!(m_drcoptions & PPCDRC_ACCURATE_SINGLES))
return generate_instruction_3f(block, compiler, desc);
UML_FDDIV(block, F0, F64(G_RA(op)), F64(G_RB(op))); // fddiv f0,ra,rb
UML_FDCMP(block, F64(G_RB(op)), mem(&m_core->fp0)); // fdcmp rb,0
UML_JMPc(block, COND_Z, compiler->labelnum); // bz 1:
UML_FDDIV(block, F0, F64(G_RA(op)), F64(G_RB(op))); // fddiv f0,ra,rb
UML_JMP(block, compiler->labelnum+1); // bz 2:
UML_LABEL(block, compiler->labelnum++); // 1:
UML_FDMOV(block, F0, mem(&m_core->fp0)); // fdmov f0,0
UML_LABEL(block, compiler->labelnum++); // 2:
UML_FDRNDS(block, F64(G_RD(op)), F0); // fdrnds rd,f0
generate_fp_flags(block, desc, TRUE);
return TRUE;
@ -3566,7 +3572,13 @@ int ppc_device::generate_instruction_3f(drcuml_block *block, compiler_state *com
return TRUE;
case 0x12: /* FDIVx */
UML_FDCMP(block, F64(G_RB(op)), mem(&m_core->fp0)); // fdcmp rb,0
UML_JMPc(block, COND_Z, compiler->labelnum); // bz 1:
UML_FDDIV(block, F64(G_RD(op)), F64(G_RA(op)), F64(G_RB(op))); // fddiv rd,ra,rb
UML_JMP(block, compiler->labelnum+1); // bz 2:
UML_LABEL(block, compiler->labelnum++); // 1:
UML_FDMOV(block, F64(G_RD(op)), mem(&m_core->fp0)); // fdmov rd,0
UML_LABEL(block, compiler->labelnum++); // 2:
generate_fp_flags(block, desc, TRUE);
return TRUE;