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[PULL,21/50] target/ppc: add ov32 flag for multiply low insns

Message ID 20170301044405.1792-22-david@gibson.dropbear.id.au
State New
Headers show

Commit Message

David Gibson March 1, 2017, 4:43 a.m. UTC 
From: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>

For Multiply Word:
SO, OV, and OV32 bits reflects overflow of the 32-bit result

For Multiply DoubleWord:
SO, OV, and OV32 bits reflects overflow of the 64-bit result

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 target/ppc/translate.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox

Patch

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index d4d9941..ccf3bff 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -1285,6 +1285,9 @@  static void gen_mullwo(DisasContext *ctx)
     tcg_gen_sari_i32(t0, t0, 31);
     tcg_gen_setcond_i32(TCG_COND_NE, t0, t0, t1);
     tcg_gen_extu_i32_tl(cpu_ov, t0);
+    if (is_isa300(ctx)) {
+        tcg_gen_mov_tl(cpu_ov32, cpu_ov);
+    }
     tcg_gen_or_tl(cpu_so, cpu_so, cpu_ov);
 
     tcg_temp_free_i32(t0);
@@ -1346,6 +1349,9 @@  static void gen_mulldo(DisasContext *ctx)
 
     tcg_gen_sari_i64(t0, t0, 63);
     tcg_gen_setcond_i64(TCG_COND_NE, cpu_ov, t0, t1);
+    if (is_isa300(ctx)) {
+        tcg_gen_mov_tl(cpu_ov32, cpu_ov);
+    }
     tcg_gen_or_tl(cpu_so, cpu_so, cpu_ov);
 
     tcg_temp_free_i64(t0);