diff mbox

[RFC,v2,10/13] target-ppc: add setb instruction

Message ID 1469263490-19130-11-git-send-email-nikunj@linux.vnet.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Nikunj A. Dadhania July 23, 2016, 8:44 a.m. UTC 
From: Vivek Andrew Sha <vivekandrewsha@gmail.com>

The CR number is provided in the opcode as - BFA (11:13)

Returns:
  -1 if bit 0 of CR field is set
   1 if bit 1 of CR field is set
   0 otherwise.

Signed-off-by: Vivek Andrew Sha <vivekandrewsha@gmail.com>
[ reworded commit, used 32bit ops as crf is 32bits ]
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
---
 target-ppc/translate.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

Comments

Richard Henderson July 24, 2016, 1:35 a.m. UTC | #1 
On 07/23/2016 02:14 PM, Nikunj A Dadhania wrote:
> From: Vivek Andrew Sha <vivekandrewsha@gmail.com>
>
> The CR number is provided in the opcode as - BFA (11:13)
>
> Returns:
>   -1 if bit 0 of CR field is set
>    1 if bit 1 of CR field is set
>    0 otherwise.
>
> Signed-off-by: Vivek Andrew Sha <vivekandrewsha@gmail.com>
> [ reworded commit, used 32bit ops as crf is 32bits ]
> Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
> ---
>  target-ppc/translate.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)

Reviewed-by: Richard Henderson <rth@twiddle.net>


r~
diff mbox

Patch

diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 0d999d4..ba40fe8 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -4804,6 +4804,27 @@  static void gen_mtspr(DisasContext *ctx)
     }
 }
 
+#if defined(TARGET_PPC64)
+/* setb */
+static void gen_setb(DisasContext *ctx)
+{
+    TCGv_i32 t0 = tcg_temp_new_i32();
+    TCGv_i32 t8 = tcg_temp_new_i32();
+    TCGv_i32 tm1 = tcg_temp_new_i32();
+    int crf = crfS(ctx->opcode);
+
+    tcg_gen_setcondi_i32(TCG_COND_GEU, t0, cpu_crf[crf], 4);
+    tcg_gen_movi_i32(t8, 8);
+    tcg_gen_movi_i32(tm1, -1);
+    tcg_gen_movcond_i32(TCG_COND_GEU, t0, cpu_crf[crf], t8, tm1, t0);
+    tcg_gen_ext_i32_tl(cpu_gpr[rD(ctx->opcode)], t0);
+
+    tcg_temp_free_i32(t0);
+    tcg_temp_free_i32(t8);
+    tcg_temp_free_i32(tm1);
+}
+#endif
+
 /***                         Cache management                              ***/
 
 /* dcbf */
@@ -10122,6 +10143,7 @@  GEN_HANDLER(mftb, 0x1F, 0x13, 0x0B, 0x00000001, PPC_MFTB),
 GEN_HANDLER(mtcrf, 0x1F, 0x10, 0x04, 0x00000801, PPC_MISC),
 #if defined(TARGET_PPC64)
 GEN_HANDLER(mtmsrd, 0x1F, 0x12, 0x05, 0x001EF801, PPC_64B),
+GEN_HANDLER_E(setb, 0x1F, 0x00, 0x04, 0x0003F801, PPC_NONE, PPC2_ISA300),
 #endif
 GEN_HANDLER(mtmsr, 0x1F, 0x12, 0x04, 0x001EF801, PPC_MISC),
 GEN_HANDLER(mtspr, 0x1F, 0x13, 0x0E, 0x00000000, PPC_MISC),