diff options
| author | Michael Clark <mjc@sifive.com> | 2018-03-23 01:07:01 -0700 |
|---|---|---|
| committer | Michael Clark <mjc@sifive.com> | 2018-03-28 11:12:02 -0700 |
| commit | 33b4f859f1e1ea6722d10c3e9c0e3d85afb44ff4 (patch) | |
| tree | 463c9021e0e1f31340ac34b700429a7f4daa059c /disas | |
| parent | eab158625703457b8aa6ce6c1b88a0e2c4899cc5 (diff) | |
RISC-V: Fix incorrect disassembly for addiw
This fixes a bug in the disassembler constraints used
to lift instructions into pseudo-instructions, whereby
addiw instructions are always lifted to sext.w instead
of just lifting addiw with a zero immediate.
An associated fix has been made to the metadata used to
machine generate the disseasembler:
https://github.com/michaeljclark/riscv-meta/
commit/4a6b2f3898430768acfe201405224d2ea31e1477
Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Clark <mjc@sifive.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'disas')
| -rw-r--r-- | disas/riscv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/disas/riscv.c b/disas/riscv.c index 3c17501120..74ad16eacd 100644 --- a/disas/riscv.c +++ b/disas/riscv.c @@ -600,7 +600,7 @@ static const rvc_constraint rvcc_mv[] = { rvc_imm_eq_zero, rvc_end }; static const rvc_constraint rvcc_not[] = { rvc_imm_eq_n1, rvc_end }; static const rvc_constraint rvcc_neg[] = { rvc_rs1_eq_x0, rvc_end }; static const rvc_constraint rvcc_negw[] = { rvc_rs1_eq_x0, rvc_end }; -static const rvc_constraint rvcc_sext_w[] = { rvc_rs2_eq_x0, rvc_end }; +static const rvc_constraint rvcc_sext_w[] = { rvc_imm_eq_zero, rvc_end }; static const rvc_constraint rvcc_seqz[] = { rvc_imm_eq_p1, rvc_end }; static const rvc_constraint rvcc_snez[] = { rvc_rs1_eq_x0, rvc_end }; static const rvc_constraint rvcc_sltz[] = { rvc_rs2_eq_x0, rvc_end }; |