diff options
author | Korey Sewell <ksewell@umich.edu> | 2006-05-09 15:18:36 -0400 |
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committer | Korey Sewell <ksewell@umich.edu> | 2006-05-09 15:18:36 -0400 |
commit | 01304f8935fd0f1ac649de1ebcdf4a913473444f (patch) | |
tree | 41ac1253552b71c986b56f6ad8fa506e498c73e4 /arch/mips | |
parent | c01a43d302b34f2d7eec99468677a111370c6ca1 (diff) | |
download | gem5-01304f8935fd0f1ac649de1ebcdf4a913473444f.tar.xz |
decoder.isa:
Basic Code for Floating Point Compare with Single Precision Floats
Added.
arch/mips/isa/decoder.isa:
Basic Code for Floating Point Compare with Single Precision Floats
Added.
--HG--
extra : convert_revision : 56b14da1e9d987c2d2090fd2f79af8b12fe8d2ec
Diffstat (limited to 'arch/mips')
-rw-r--r-- | arch/mips/isa/decoder.isa | 168 |
1 files changed, 118 insertions, 50 deletions
diff --git a/arch/mips/isa/decoder.isa b/arch/mips/isa/decoder.isa index 1e78d27d9..b9774c6b1 100644 --- a/arch/mips/isa/decoder.isa +++ b/arch/mips/isa/decoder.isa @@ -204,7 +204,6 @@ decode OPCODE_HI default Unknown::unknown() { } format BranchLikely { - //MIPS obsolete instructions 0x2: bltzl({{ cond = (Rs.sw < 0); }}); 0x3: bgezl({{ cond = (Rs.sw >= 0); }}); } @@ -228,7 +227,6 @@ decode OPCODE_HI default Unknown::unknown() { } format BranchLikely { - //Will be removed in future MIPS releases 0x2: bltzall({{ cond = (Rs.sw < 0); }}, IsCall, IsReturn); 0x3: bgezall({{ cond = (Rs.sw >= 0); }}, IsCall, IsReturn); } @@ -552,8 +550,8 @@ decode OPCODE_HI default Unknown::unknown() { 0x2: decode FUNCTION_LO { 0x1: decode MOVCF { format FloatOp { - 0x0: movf_s({{if (FPConditionCode(CC) == 0) Fd = Fs;}}); - 0x1: movt_s({{if (FPConditionCode(CC) == 1) Fd = Fs;}}); + 0x0: movf_s({{if (getFPConditionCode(CC) == 0) Fd = Fs;}}); + 0x1: movt_s({{if (getFPConditionCode(CC) == 1) Fd = Fs;}}); } } @@ -567,7 +565,7 @@ decode OPCODE_HI default Unknown::unknown() { 0x4: decode FUNCTION_LO { - format FloatOp { + format FloatConvertOp { 0x1: cvt_d_s({{ Fd.ud = fpConvert(Fs.sf, SINGLE_TO_DOUBLE); }}); @@ -577,7 +575,7 @@ decode OPCODE_HI default Unknown::unknown() { }}); } - format Float64Op { + format FloatConvertOp { 0x5: cvt_l_s({{ Fd.ud = fpConvert(Fs.sf, SINGLE_TO_LONG); }}); @@ -589,28 +587,100 @@ decode OPCODE_HI default Unknown::unknown() { } 0x6: decode FUNCTION_LO { - format FloatOp { - 0x0: c_f_s({{ ; }}); - 0x1: c_un_s({{ ; }}); - 0x2: c_eq_s({{ ; }}); - 0x3: c_ueq_s({{ ; }}); - 0x4: c_olt_s({{ ; }}); - 0x5: c_ult_s({{ ; }}); - 0x6: c_ole_s({{ ; }}); - 0x7: c_ule_s({{ ; }}); + format FloatCompareOp { + 0x0: c_f_s({{ cond = 0; }}); + 0x1: c_un_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = 0; + }}); + 0x2: c_eq_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 0; + else + cond = (Fs == Ft); + }}); + 0x3: c_ueq_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = (Fs == Ft); + }}); + 0x4: c_olt_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 0; + else + cond = ; + ; + }}); + 0x5: c_ult_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + ; + }}); + 0x6: c_ole_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 0; + else + cond = ; + }}); + 0x7: c_ule_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + }}); } } 0x7: decode FUNCTION_LO { - format FloatOp { - 0x0: c_sf_s({{ ; }}); - 0x1: c_ngle_s({{ ; }}); - 0x2: c_seq_s({{ ; }}); - 0x3: c_ngl_s({{ ; }}); - 0x4: c_lt_s({{ ; }}); - 0x5: c_nge_s({{ ; }}); - 0x6: c_le_s({{ ; }}); - 0x7: c_ngt_s({{ ; }}); + format FloatCompareWithXcptOp { + 0x0: c_sf_s({{ cond = 0; }}); + 0x1: c_ngle_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + }}); + 0x2: c_seq_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + }}); + 0x3: c_ngl_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + }}); + 0x4: c_lt_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + }}); + 0x5: c_nge_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + }}); + 0x6: c_le_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + }}); + 0x7: c_ngt_s({{ + if (unordered(Rs) || unordered(Rt)) + cond = 1; + else + cond = ; + }}); } } } @@ -912,23 +982,17 @@ decode OPCODE_HI default Unknown::unknown() { 0x3: decode FUNCTION_HI { 0x0: decode FUNCTION_LO { format LoadFloatMemory { - 0x0: lwxc1({{ /*F_t<31:0> = Mem.sf; */}}, {{ EA = Rs + Rt; }}); - 0x1: ldxc1({{ /*F_t<63:0> = Mem.df;*/ }}, {{ EA = Rs + Rt; }}); - 0x5: luxc1({{ /*F_t<31:0> = Mem.df; */}}, - {{ //Need to make EA<2:0> = 0 - EA = Rs + Rt; - }}); + 0x0: lwxc1({{ Ft.uw = Mem.uw;}}, {{ EA = Rs + Rt; }}); + 0x1: ldxc1({{ Ft.ud = Mem.ud;}}, {{ EA = Rs + Rt; }}); + 0x5: luxc1({{ Ft.uw = Mem.ud;}}, {{ EA = Rs + Rt; }}); } } 0x1: decode FUNCTION_LO { format StoreFloatMemory { - 0x0: swxc1({{ /*Mem.sf = Ft<31:0>; */}},{{ EA = Rs + Rt; }}); - 0x1: sdxc1({{ /*Mem.df = Ft<63:0> */}}, {{ EA = Rs + Rt; }}); - 0x5: suxc1({{ /*Mem.df = F_t<63:0>;*/}}, - {{ //Need to make sure EA<2:0> = 0 - EA = Rs + Rt; - }}); + 0x0: swxc1({{ Mem.uw = Ft.uw;}}, {{ EA = Rs + Rt; }}); + 0x1: sdxc1({{ Mem.ud = Ft.ud;}}, {{ EA = Rs + Rt; }}); + 0x5: suxc1({{ Mem.ud = Ft.ud;}}, {{ EA = Rs + Rt; }}); } 0x7: WarnUnimpl::prefx(); @@ -1032,25 +1096,29 @@ decode OPCODE_HI default Unknown::unknown() { 0x4: decode FUNCTION_LO { format BasicOp { 0x0: clz({{ - /*int cnt = 0; - int idx = 0; - while ( Rs.uw<idx> != 1) { - cnt++; - idx--; + int cnt = 0; + uint32_t mask = 0x80000000; + for (int i=0; i < 32; i++) + if( (Rs & mask) == 0) { + cnt++; + } else { + break; + } } - - Rd.uw = cnt;*/ + Rd.uw = cnt; }}); 0x1: clo({{ - /*int cnt = 0; - int idx = 0; - while ( Rs.uw<idx> != 0) { - cnt++; - idx--; + int cnt = 0; + uint32_t mask = 0x80000000; + for (int i=0; i < 32; i++) + if( (Rs & mask) != 0) { + cnt++; + } else { + break; + } } - - Rd.uw = cnt;*/ + Rd.uw = cnt; }}); } } |