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Added RV32F extension, fixed RV32M bugs

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This commit is contained in:
Eyck Jentzsch
2018-04-24 11:05:11 +02:00
parent bc7450dad2
commit 48ad30dcae
21 changed files with 8208 additions and 512 deletions
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28
riscv/gen_input/RV32M.core_desc
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@@ -41,9 +41,17 @@ InsructionSet RV32M extends RV32IBase {
encoding: b0000001 | rs2[4:0] | rs1[4:0] | b100 | rd[4:0] | b0110011;
args_disass:"x%rd$d, x%rs1$d, x%rs2$d";
if(rd != 0){
if(X[rs2]!=0)
X[rd] <= sext(X[rs1], 32) / sext(X[rs2], 32);
else
if(X[rs2]!=0){
val M1[XLEN] <= -1;
val MMIN[XLEN] <= -1<<(XLEN-1);
if(X[rs1]s==MMIN's)
if(X[rs2]s==M1's)
X[rd]<=MMIN;
else
X[rd] <= X[rs1]s / X[rs2]s;
else
X[rd] <= X[rs1]s / X[rs2]s;
}else
X[rd] <= -1;
}
}
@@ -61,9 +69,17 @@ InsructionSet RV32M extends RV32IBase {
encoding: b0000001 | rs2[4:0] | rs1[4:0] | b110 | rd[4:0] | b0110011;
args_disass:"x%rd$d, x%rs1$d, x%rs2$d";
if(rd != 0){
if(X[rs2]!=0)
X[rd] <= sext(X[rs1], 32) % sext(X[rs2], 32);
else
if(X[rs2]!=0) {
val M1[XLEN] <= -1;
val MMIN[XLEN] <= -1<<(XLEN-1);
if(X[rs1]s==MMIN's)
if(X[rs2]s==M1's)
X[rd] <= 0;
else
X[rd] <= sext(X[rs1], 32) % sext(X[rs2], 32);
else
X[rd] <= sext(X[rs1], 32) % sext(X[rs2], 32);
} else
X[rd] <= X[rs1];
}
}