[PATCH] target/mips: fix emulation of nanoMIPS BPOSGE32 instruction

[Aleksandar Rikalo]

Per the "MIPS® Architecture Extension: nanoMIPS32 DSP Technical

Reference Manual — Revision 0.04" p. 88 "BPOSGE32C", offset argument (imm)

should be left-shifted first.

This change was tested against test_dsp_r1_bposge32.c DSP test.

Reviewed-by: Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>

Signed-off-by: Filip Vidojevic <filip.vidojevic@syrmia.com>

---

 target/mips/tcg/translate.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c

index 797eba4434..2d0a723061 100644

--- a/target/mips/tcg/translate.c

+++ b/target/mips/tcg/translate.c

@@ -21137,7 +21137,7 @@ static int decode_nanomips_32_48_opc(CPUMIPSState *env, DisasContext *ctx)

                                       extract32(ctx->opcode, 0, 1) << 13;

 

                         gen_compute_branch_nm(ctx, OPC_BPOSGE32, 4, -1, -2,

-                                              imm);

+                                              imm << 1);

                     }

                     break;

                 default:

--

2.25.1