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Fix mulscc.

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--HG--
extra : convert_revision : 405f10f14f2f6666a7bef01bfb0cf90ff14cef24
This commit is contained in:
Gabe Black
2007-03-12 17:07:10 -04:00
parent b3bdce81fd
commit 1f3c3aa234
1 changed files with 14 additions and 11 deletions
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25
src/arch/sparc/isa/decoder.isa
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@@ -426,19 +426,22 @@ decode OP default Unknown::unknown()
{{Rs1<63:> == val2<63:> && val2<63:> != resTemp<63:>}}
);
0x24: mulscc({{
int64_t resTemp, multiplicand = Rs2_or_imm13;
int32_t multiplier = Rs1<31:0>;
int32_t savedLSB = Rs1<0:>;
multiplier = multiplier<31:1> |
((Ccr<3:3> ^ Ccr<1:1>) << 32);
if(!Y<0:>)
multiplicand = 0;
Rd = resTemp = multiplicand + multiplier;
//Step 1
int64_t multiplicand = Rs2_or_imm13;
//Step 2
int32_t partialP = Rs1<31:1> |
((Ccr<3:3> ^ Ccr<1:1>) << 31);
//Step 3
int32_t added = Y<0:> ? multiplicand : 0;
Rd = partialP + added;
//Steps 4 & 5
Y = Y<31:1> | (savedLSB << 31);}},
{{((multiplicand<31:0> + multiplier<31:0>)<32:0>)}},
{{multiplicand<31:> == multiplier<31:> && multiplier<31:> != resTemp<31:>}},
{{((multiplicand >> 1) + (multiplier >> 1) + (multiplicand & multiplier & 0x1))<63:>}},
{{multiplicand<63:> == multiplier<63:> && multiplier<63:> != resTemp<63:>}}
{{((partialP<31:0> + added<31:0>)<32:0>)}},
{{partialP<31:> == added<31:> && added<31:> != Rd<31:>}},
{{((partialP >> 1) + (added >> 1) + (partialP & added & 0x1))<63:>}},
{{partialP<63:> == added<63:> && partialP<63:> != Rd<63:>}}
);
}
format IntOp