[Qemu-devel] [PATCH 12/28] target-ppc: Altivec 2.07: Add Vector Count Leading Zeroes

[Tom Musta <tommusta@gmail.com>]

This patch adds the Vector Count Leading Zeroes instructions introduced
in Power ISA Version 2.07 - vclzb, vclzh, vclzw and vclzd.

Signed-off-by: Tom Musta <tommusta@gmail.com>
---
 target-ppc/helper.h     |    5 +++++
 target-ppc/int_helper.c |   29 +++++++++++++++++++++++++++++
 target-ppc/translate.c  |    9 +++++++++
 3 files changed, 43 insertions(+), 0 deletions(-)

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index c20d50e..7ca219f 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -273,6 +273,11 @@ DEF_HELPER_4(vcfsx, void, env, avr, avr, i32)
 DEF_HELPER_4(vctuxs, void, env, avr, avr, i32)
 DEF_HELPER_4(vctsxs, void, env, avr, avr, i32)
 
+DEF_HELPER_2(vclzb, void, avr, avr)
+DEF_HELPER_2(vclzh, void, avr, avr)
+DEF_HELPER_2(vclzw, void, avr, avr)
+DEF_HELPER_2(vclzd, void, avr, avr)
+
 DEF_HELPER_2(xsadddp, void, env, i32)
 DEF_HELPER_2(xssubdp, void, env, i32)
 DEF_HELPER_2(xsmuldp, void, env, i32)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 7a50f4a..7fca9f0 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -1524,6 +1524,35 @@ VUPK(lsh, s32, s16, UPKLO)
 #undef UPKHI
 #undef UPKLO
 
+#define VGENERIC_DO(name, element)                                      \
+    void helper_v##name(ppc_avr_t *r, ppc_avr_t *b)                     \
+    {                                                                   \
+        int i;                                                          \
+                                                                        \
+        VECTOR_FOR_INORDER_I(i, element) {                              \
+            r->element[i] = name(b->element[i]);                        \
+        }                                                               \
+    }
+
+#define clzb(v) ((v) ? clz32((uint32_t)(v) << 24) : 8)
+#define clzh(v) ((v) ? clz32((uint32_t)(v) << 16) : 16)
+#define clzw(v) clz32((v))
+#define clzd(v) clz64((v))
+
+VGENERIC_DO(clzb, u8)
+VGENERIC_DO(clzh, u16)
+VGENERIC_DO(clzw, u32)
+VGENERIC_DO(clzd, u64)
+
+#undef clzb
+#undef clzh
+#undef clzw
+#undef clzd
+
+
+#undef VGENERIC_DO
+
+
 #undef VECTOR_FOR_INORDER_I
 #undef HI_IDX
 #undef LO_IDX
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index bbaaf6e..ff6ddfc 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -7281,6 +7281,10 @@ GEN_VAFORM_PAIRED(vmsumshm, vmsumshs, 20)
 GEN_VAFORM_PAIRED(vsel, vperm, 21)
 GEN_VAFORM_PAIRED(vmaddfp, vnmsubfp, 23)
 
+GEN_VXFORM_NOA(vclzb, 1, 28)
+GEN_VXFORM_NOA(vclzh, 1, 29)
+GEN_VXFORM_NOA(vclzw, 1, 30)
+GEN_VXFORM_NOA(vclzd, 1, 31)
 /***                           VSX extension                               ***/
 
 static inline TCGv_i64 cpu_vsrh(int n)
@@ -10477,6 +10481,11 @@ GEN_VAFORM_PAIRED(vmsumshm, vmsumshs, 20),
 GEN_VAFORM_PAIRED(vsel, vperm, 21),
 GEN_VAFORM_PAIRED(vmaddfp, vnmsubfp, 23),
 
+GEN_VXFORM_207(vclzb, 1, 28),
+GEN_VXFORM_207(vclzh, 1, 29),
+GEN_VXFORM_207(vclzw, 1, 30),
+GEN_VXFORM_207(vclzd, 1, 31),
+
 GEN_HANDLER_E(lxsdx, 0x1F, 0x0C, 0x12, 0, PPC_NONE, PPC2_VSX),
 GEN_HANDLER_E(lxsiwax, 0x1F, 0x0C, 0x02, 0, PPC_NONE, PPC2_VSX207),
 GEN_HANDLER_E(lxsiwzx, 0x1F, 0x0C, 0x00, 0, PPC_NONE, PPC2_VSX207),
-- 
1.7.1