diff options
| author | Michael Clark <mjc@sifive.com> | 2018-03-05 13:28:00 +1300 |
|---|---|---|
| committer | Michael Clark <mjc@sifive.com> | 2018-05-06 10:39:38 +1200 |
| commit | 79f86934267135080e13e02b52c74371220d8e06 (patch) | |
| tree | d894040db2c1167178fde60f6c665ef51ce89db9 | |
| parent | 8d196c43d7e247edbda7be7b1597ea184f6b498e (diff) | |
RISC-V: Update E and I extension order
Section 22.8 Subset Naming Convention of the RISC-V ISA Specification
defines the canonical order for extensions in the ISA string. It is
silent on the position of the E extension however E is a substitute
for I so it must come early in the extension list order. A comment
is added to state E and I are mutually exclusive, as the E extension
will be added to the RISC-V port in the future.
Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Alistair Francis <Alistair.Francis@wdc.com>
Signed-off-by: Michael Clark <mjc@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
| -rw-r--r-- | target/riscv/cpu.c | 2 | ||||
| -rw-r--r-- | target/riscv/cpu.h | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 5a527fbba0..4e5a56d4e3 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -26,7 +26,7 @@ /* RISC-V CPU definitions */ -static const char riscv_exts[26] = "IMAFDQECLBJTPVNSUHKORWXYZG"; +static const char riscv_exts[26] = "IEMAFDQCLBJTPVNSUHKORWXYZG"; const char * const riscv_int_regnames[] = { "zero", "ra ", "sp ", "gp ", "tp ", "t0 ", "t1 ", "t2 ", diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 9871e6feb1..1dcbdbe6f7 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -71,6 +71,7 @@ #define RV(x) ((target_ulong)1 << (x - 'A')) #define RVI RV('I') +#define RVE RV('E') /* E and I are mutually exclusive */ #define RVM RV('M') #define RVA RV('A') #define RVF RV('F') |