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CPU_Decode_C.bsv: Sync from Flute

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This incorporates the fix made to Piccolo and Flute to not trap on
C.FLWSP/C.FLDSP when rd == 0; unlike the compressed stack pointer
relative integer loads/stores, these are legal, since f0 is a real FPR
rather than a constant zero.
This commit is contained in:
Jessica Clarke
2020-06-03 18:14:58 +01:00
parent 30974aa761
commit 1d12a97741
1 changed files with 0 additions and 2 deletions
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2
src_Core/CPU/CPU_Decode_C.bsv
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@@ -240,7 +240,6 @@ function Tuple2 #(Bool, Instr) fv_decode_C_FLWSP (MISA misa, Bit #(2) xl, Inst
Bool is_legal = ((misa.c == 1'b1)
&& (op == opcode_C2)
&& (rd != 0)
&& (funct3 == funct3_C_FLWSP)
&& (misa.f == 1'b1));
@@ -262,7 +261,6 @@ function Tuple2 #(Bool, Instr) fv_decode_C_FLDSP (MISA misa, Bit #(2) xl, Inst
Bool is_legal = ((misa.c == 1'b1)
&& (op == opcode_C2)
&& (rd != 0)
&& (funct3 == funct3_C_FLDSP)
&& (misa.d == 1'b1)
&& ( (xl == misa_mxl_64)