[Qemu-devel] [PATCH v2 6/6] SPARCV8 asr17 register support.

[Fabien Chouteau]

Signed-off-by: Fabien Chouteau <address@hidden>
---
 target-sparc/cpu.h       |    1 +
 target-sparc/helper.c    |    3 ++-
 target-sparc/translate.c |   10 ++++++++++
 3 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/target-sparc/cpu.h b/target-sparc/cpu.h
index 7795be4..fe082e3 100644
--- a/target-sparc/cpu.h
+++ b/target-sparc/cpu.h
@@ -266,6 +266,7 @@ typedef struct sparc_def_t {
 #define CPU_FEATURE_CMT          (1 << 12)
 #define CPU_FEATURE_GL           (1 << 13)
 #define CPU_FEATURE_TA0_SHUTDOWN (1 << 14) /* Shutdown on "ta 0x0" */
+#define CPU_FEATURE_ASR17        (1 << 15)
 #ifndef TARGET_SPARC64
 #define CPU_DEFAULT_FEATURES (CPU_FEATURE_FLOAT | CPU_FEATURE_SWAP |  \
                               CPU_FEATURE_MUL | CPU_FEATURE_DIV |     \
diff --git a/target-sparc/helper.c b/target-sparc/helper.c
index 49bdb58..baab379 100644
--- a/target-sparc/helper.c
+++ b/target-sparc/helper.c
@@ -1302,7 +1302,8 @@ static const sparc_def_t sparc_defs[] = {
         .mmu_sfsr_mask = 0xffffffff,
         .mmu_trcr_mask = 0xffffffff,
         .nwindows = 8,
-        .features = CPU_DEFAULT_FEATURES | CPU_FEATURE_TA0_SHUTDOWN,
+        .features = CPU_DEFAULT_FEATURES | CPU_FEATURE_TA0_SHUTDOWN |
+        CPU_FEATURE_ASR17,
     },
 #endif
 };
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index b0e8044..05f942f 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -2068,6 +2068,16 @@ static void disas_sparc_insn(DisasContext * dc)
                 case 0x10 ... 0x1f: /* implementation-dependent in the
                                        SPARCv8 manual, rdy on the
                                        microSPARC II */
+                    if (rs1 == 0x11) { /* Read Asr17 */
+                        TCGv r_const;
+                        CHECK_IU_FEATURE(dc, ASR17);
+                        /* Asr17 for a Leon3 monoprocessor */
+                        r_const = tcg_const_tl((1 << 8)
+                                               | (dc->def->nwindows - 1));
+                        gen_movl_TN_reg(rd, r_const);
+                        tcg_temp_free(r_const);
+                        break;
+                    }
 #endif
                     gen_movl_TN_reg(rd, cpu_y);
                     break;
-- 
1.7.1