[Qemu-devel] [PULL 06/45] target-ppc: add vector bit permute doubleword instruction

[David Gibson]

From: Rajalakshmi Srinivasaraghavan <address@hidden>

Add vbpermd instruction from ISA 3.0.

Signed-off-by: Rajalakshmi Srinivasaraghavan <address@hidden>
Signed-off-by: David Gibson <address@hidden>
---
 target-ppc/helper.h                 |  1 +
 target-ppc/int_helper.c             | 20 ++++++++++++++++++++
 target-ppc/translate/vmx-impl.inc.c |  1 +
 target-ppc/translate/vmx-ops.inc.c  |  1 +
 4 files changed, 23 insertions(+)

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index b11c39a..e148861 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -333,6 +333,7 @@ DEF_HELPER_2(vpopcntb, void, avr, avr)
 DEF_HELPER_2(vpopcnth, void, avr, avr)
 DEF_HELPER_2(vpopcntw, void, avr, avr)
 DEF_HELPER_2(vpopcntd, void, avr, avr)
+DEF_HELPER_3(vbpermd, void, avr, avr, avr)
 DEF_HELPER_3(vbpermq, void, avr, avr, avr)
 DEF_HELPER_2(vgbbd, void, avr, avr)
 DEF_HELPER_3(vpmsumb, void, avr, avr, avr)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 4d1582d..b12af95 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -1128,12 +1128,32 @@ void helper_vperm(CPUPPCState *env, ppc_avr_t *r, 
ppc_avr_t *a, ppc_avr_t *b,
 
 #if defined(HOST_WORDS_BIGENDIAN)
 #define VBPERMQ_INDEX(avr, i) ((avr)->u8[(i)])
+#define VBPERMD_INDEX(i) (i)
 #define VBPERMQ_DW(index) (((index) & 0x40) != 0)
+#define EXTRACT_BIT(avr, i, index) (extract64((avr)->u64[i], index, 1))
 #else
 #define VBPERMQ_INDEX(avr, i) ((avr)->u8[15-(i)])
+#define VBPERMD_INDEX(i) (1 - i)
 #define VBPERMQ_DW(index) (((index) & 0x40) == 0)
+#define EXTRACT_BIT(avr, i, index) \
+        (extract64((avr)->u64[1 - i], 63 - index, 1))
 #endif
 
+void helper_vbpermd(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
+{
+    int i, j;
+    ppc_avr_t result = { .u64 = { 0, 0 } };
+    VECTOR_FOR_INORDER_I(i, u64) {
+        for (j = 0; j < 8; j++) {
+            int index = VBPERMQ_INDEX(b, (i * 8) + j);
+            if (index < 64 && EXTRACT_BIT(a, i, index)) {
+                result.u64[VBPERMD_INDEX(i)] |= (0x80 >> j);
+            }
+        }
+    }
+    *r = result;
+}
+
 void helper_vbpermq(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
 {
     int i;
diff --git a/target-ppc/translate/vmx-impl.inc.c 
b/target-ppc/translate/vmx-impl.inc.c
index 982feff..cb89330 100644
--- a/target-ppc/translate/vmx-impl.inc.c
+++ b/target-ppc/translate/vmx-impl.inc.c
@@ -792,6 +792,7 @@ GEN_VXFORM_DUAL(vclzw, PPC_NONE, PPC2_ALTIVEC_207, \
                 vpopcntw, PPC_NONE, PPC2_ALTIVEC_207)
 GEN_VXFORM_DUAL(vclzd, PPC_NONE, PPC2_ALTIVEC_207, \
                 vpopcntd, PPC_NONE, PPC2_ALTIVEC_207)
+GEN_VXFORM(vbpermd, 6, 23);
 GEN_VXFORM(vbpermq, 6, 21);
 GEN_VXFORM_NOA(vgbbd, 6, 20);
 GEN_VXFORM(vpmsumb, 4, 16)
diff --git a/target-ppc/translate/vmx-ops.inc.c 
b/target-ppc/translate/vmx-ops.inc.c
index 7172cdc..a944671 100644
--- a/target-ppc/translate/vmx-ops.inc.c
+++ b/target-ppc/translate/vmx-ops.inc.c
@@ -261,6 +261,7 @@ GEN_VXFORM_DUAL(vclzh, vpopcnth, 1, 29, PPC_NONE, 
PPC2_ALTIVEC_207),
 GEN_VXFORM_DUAL(vclzw, vpopcntw, 1, 30, PPC_NONE, PPC2_ALTIVEC_207),
 GEN_VXFORM_DUAL(vclzd, vpopcntd, 1, 31, PPC_NONE, PPC2_ALTIVEC_207),
 
+GEN_VXFORM_300(vbpermd, 6, 23),
 GEN_VXFORM_207(vbpermq, 6, 21),
 GEN_VXFORM_207(vgbbd, 6, 20),
 GEN_VXFORM_207(vpmsumb, 4, 16),
-- 
2.7.4