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target/riscv: Add checks for several RVC reserved operands 

C.ADDI16SP, C.LWSP, C.JR, C.ADDIW, C.LDSP all have reserved
operands that were not diagnosed.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
master
Richard Henderson 2019-04-25 10:26:36 -07:00 committed by Palmer Dabbelt
parent e06431108b
commit 4cc16b3b92
No known key found for this signature in database
GPG Key ID: EF4CA1502CCBAB41
2 changed files with 14 additions and 3 deletions
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10
target/riscv/insn16-64.decode
View File

@ -21,10 +21,16 @@ ld 011 ... ... .. ... 00 @cl_d
sd 111 ... ... .. ... 00 @cs_d
# *** RV64C Standard Extension (Quadrant 1) ***
addiw 001 . ..... ..... 01 @ci
{
illegal 001 - 00000 ----- 01 # c.addiw, RES rd=0
addiw 001 . ..... ..... 01 @ci
}
subw 100 1 11 ... 00 ... 01 @cs_2
addw 100 1 11 ... 01 ... 01 @cs_2
# *** RV64C Standard Extension (Quadrant 2) ***
ld 011 . ..... ..... 10 @c_ldsp
{
illegal 011 - 00000 ----- 10 # c.ldsp, RES rd=0
ld 011 . ..... ..... 10 @c_ldsp
}
sd 111 . ..... ..... 10 @c_sdsp

7
target/riscv/insn16.decode
View File

@ -96,6 +96,7 @@ sw 110 ... ... .. ... 00 @cs_w
addi 000 . ..... ..... 01 @ci
addi 010 . ..... ..... 01 @c_li
{
illegal 011 0 ----- 00000 01 # c.addi16sp and c.lui, RES nzimm=0
addi 011 . 00010 ..... 01 @c_addi16sp
lui 011 . ..... ..... 01 @c_lui
}
@ -113,8 +114,12 @@ bne 111 ... ... ..... 01 @cb_z
# *** RV32/64C Standard Extension (Quadrant 2) ***
slli 000 . ..... ..... 10 @c_shift2
fld 001 . ..... ..... 10 @c_ldsp
lw 010 . ..... ..... 10 @c_lwsp
{
illegal 010 - 00000 ----- 10 # c.lwsp, RES rd=0
lw 010 . ..... ..... 10 @c_lwsp
}
{
illegal 100 0 00000 00000 10 # c.jr, RES rs1=0
jalr 100 0 ..... 00000 10 @c_jalr rd=0 # C.JR
addi 100 0 ..... ..... 10 @c_mv
}