diff options
author | Ville Linde <villedevs@gmail.com> | 2016-03-12 01:38:23 +0200 |
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committer | Ville Linde <villedevs@gmail.com> | 2016-03-12 02:07:00 +0200 |
commit | a521d9a3cf3f35ee61dcc5378411b569e6d705aa (patch) | |
tree | bf28dba9f5847d837a9b61a19279f5ee385b440e /src/devices/cpu | |
parent | 2bf46f72eddb89a988de6e2adb8190ce328c9ae2 (diff) |
ppcdrc: handle divide by zero (nw)
Diffstat (limited to 'src/devices/cpu')
-rw-r--r-- | src/devices/cpu/powerpc/ppcdrc.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/devices/cpu/powerpc/ppcdrc.cpp b/src/devices/cpu/powerpc/ppcdrc.cpp index 35b984d240d..7390f9284e9 100644 --- a/src/devices/cpu/powerpc/ppcdrc.cpp +++ b/src/devices/cpu/powerpc/ppcdrc.cpp @@ -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; |