VP/HIFIVE1-VP
8
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Updated compressed instructions for RV32D

Browse Source
This commit is contained in:
Eyck Jentzsch
2018-04-24 15:48:42 +02:00
parent 96700d00f9
commit 65ceedd157
3 changed files with 263 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
riscv/gen_input/RV32C.core_desc
View File

@@ -218,9 +218,9 @@ InsructionSet RV32FC extends RV32IC{
val res[32] <= MEM[offs]{32};
if(FLEN==32)
F[rd_idx] <= res;
else {
val upper[FLEN] <= (-1<<31);
F[rd_idx] <= upper*2 | res;
else { // NaN boxing
val upper[FLEN] <= -1;
F[rd] <= (upper<<32) | zext(res, FLEN);
}
}
C.FSW {
@@ -239,9 +239,9 @@ InsructionSet RV32FC extends RV32IC{
val res[32] <= MEM[offs]{32};
if(FLEN==32)
F[rd] <= res;
else {
val upper[FLEN] <= (-1<<31);
F[rd] <= upper*2 | res;
else { // NaN boxing
val upper[FLEN] <= -1;
F[rd] <= (upper<<32) | zext(res, FLEN);
}
}
C.FSWSP {
@@ -249,7 +249,7 @@ InsructionSet RV32FC extends RV32IC{
args_disass:"f%rs2$d, %uimm%(x2), ";
val x2_idx[5] <= 2;
val offs[XLEN] <= X[x2_idx]+uimm;
MEM[offs]{32}<=F[rs2];
MEM[offs]{32}<=F[rs2]{32};
}
}
}
@@ -268,15 +268,45 @@ InsructionSet RV32DC extends RV32IC{
instructions{
C.FLD { //(RV32/64)
encoding: b001 | uimm[5:3] | rs1[2:0] | uimm[7:6] | rd[2:0] | b00;
args_disass:"f(8+%rd$d), %uimm%(x(8+%rs1$d))";
val rs1_idx[5] <= rs1+8;
val rd_idx[5] <= rd+8;
val offs[XLEN] <= X[rs1_idx]+uimm;
val res[64] <= MEM[offs]{64};
if(FLEN==64)
F[rd_idx] <= res;
else { // NaN boxing
val upper[FLEN] <= -1;
F[rd_idx] <= (upper<<64) | res;
}
}
C.FSD { //(RV32/64)
encoding: b101 | uimm[5:3] | rs1[2:0] | uimm[7:6] | rs2[2:0] | b00;
args_disass:"f(8+%rs2$d), %uimm%(x(8+%rs1$d))";
val rs1_idx[5] <= rs1+8;
val rs2_idx[5] <= rs2+8;
val offs[XLEN] <= X[rs1_idx]+uimm;
MEM[offs]{64}<=F[rs2_idx]{64};
}
C.FLDSP {//(RV32/64)
encoding:b001 | uimm[5:5] | rd[4:0] | uimm[4:3] | uimm[8:6] | b10;
args_disass:"f%rd$d, %uimm%(x2)";
val x2_idx[5] <= 2;
val offs[XLEN] <= X[x2_idx]+uimm;
val res[64] <= MEM[offs]{64};
if(FLEN==64)
F[rd] <= res;
else { // NaN boxing
val upper[FLEN] <= -1;
F[rd] <= (upper<<64) | zext(res, FLEN);
}
}
C.FSDSP {//(RV32/64)
encoding:b101 | uimm[5:3] | uimm[8:6] | rs2[4:0] | b10;
args_disass:"f%rs2$d, %uimm%(x2), ";
val x2_idx[5] <= 2;
val offs[XLEN] <= X[x2_idx]+uimm;
MEM[offs]{64}<=F[rs2]{64};
}
}
}