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Tweaks to Ali's changes

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--HG--
extra : convert_revision : ca2a81dd38012ae780f88cfd6be60f21fb43bb81
This commit is contained in:
Gabe Black 2006-08-15 19:17:18 -04:00
parent de29f555c4
commit da6649fa71
1 changed files with 10 additions and 11 deletions
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21
src/arch/sparc/isa/decoder.isa
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@ -235,17 +235,16 @@ decode OP default Unknown::unknown()
{{0}}
);
0x1F: sdivcc({{
int32_t resTemp, val2 = Rs2_or_imm13.sdw;
int32_t overflow = 0, underflow = 0;
int64_t val2 = Rs2_or_imm13.sdw<31:0>;
bool overflow = false, underflow = false;
if(val2 == 0) fault = new DivisionByZero;
else
{
Rd = resTemp = (int64_t)((Y << 32) | Rs1.sdw<31:0>) / val2;
overflow = (resTemp<63:31> != 0);
underflow = (resTemp<63:> && resTemp<62:31> != 0xFFFFFFFF);
if(overflow) Rd = resTemp = 0x7FFFFFFF;
else if(underflow) resTemp = Rd = 0xFFFFFFFF80000000ULL;
else Rd = resTemp;
Rd = (int64_t)((Y << 32) | Rs1.sdw<31:0>) / val2;
overflow = (Rd<63:31> != 0);
underflow = (Rd<63:> && Rd<62:31> != 0xFFFFFFFF);
if(overflow) Rd = 0x7FFFFFFF;
else if(underflow) Rd = 0xFFFFFFFF80000000ULL;
} }},
{{0}},
{{overflow || underflow}},
@ -271,15 +270,15 @@ decode OP default Unknown::unknown()
{{Rs1<63:> == val2<63:> && val2<63:> != resTemp<63:>}}
);
0x22: taddcctv({{
int64_t resTemp, val2 = Rs2_or_imm13;
Rd = resTemp = Rs1 + val2;
int64_t val2 = Rs2_or_imm13;
Rd = Rs1 + val2;
int32_t overflow = Rs1<1:0> || val2<1:0> ||
(Rs1<31:> == val2<31:> && val2<31:> != Rd<31:>);
if(overflow) fault = new TagOverflow;}},
{{((Rs1 & 0xFFFFFFFF + val2 & 0xFFFFFFFF) >> 31)}},
{{overflow}},
{{((Rs1 >> 1) + (val2 >> 1) + (Rs1 & val2 & 0x1))<63:>}},
{{Rs1<63:> == val2<63:> && val2<63:> != resTemp<63:>}}
{{Rs1<63:> == val2<63:> && val2<63:> != Rd<63:>}}
);
0x23: tsubcctv({{
int64_t resTemp, val2 = Rs2_or_imm13;