diff options
| author | Alejandro Soto <alejandro@34project.org> | 2022-11-16 19:12:28 -0600 |
|---|---|---|
| committer | Alejandro Soto <alejandro@34project.org> | 2022-11-16 23:32:25 -0600 |
| commit | e33c30734b475879318b4f5c178a2f3bf2090bbb (patch) | |
| tree | 611a941f619f9a35fa4e0f39d3b5bfd23b5cfe2c /rtl/core/decode/mux.sv | |
| parent | 739a690947165c4c319d2dbd76d4368bf4b59b5a (diff) | |
Implement bx lr
Diffstat (limited to 'rtl/core/decode/mux.sv')
| -rw-r--r-- | rtl/core/decode/mux.sv | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/rtl/core/decode/mux.sv b/rtl/core/decode/mux.sv index 51fe14b..3f613a4 100644 --- a/rtl/core/decode/mux.sv +++ b/rtl/core/decode/mux.sv @@ -216,6 +216,20 @@ module core_decode_mux /*`GROUP_SWP: ; `INSN_SWI: ;*/ + /* No es parte de ARMv4 pero U-Boot lo necesita. esto se + * decodifica igual que `mov pc, lr` ya que no tenemos Thumb. + */ + `INSN_BXLR: begin + dec_data.op = `ALU_MOV; + dec_data.rd = `R15; + dec_data.uses_rn = 0; + + dec_snd.r = `R14; + dec_snd.is_imm = 0; + + writeback = 1; + end + default: undefined = 1; endcase |