[Qemu-devel] [PULL 17/29] target-ppc: add vclzlsbb/vctzlsbb instructions

[David Gibson <david@gibson.dropbear.id.au>]

From: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>

The following vector instructions are added from ISA 3.0.

vclzlsbb - Vector Count Leading Zero Least-Significant Bits Byte
vctzlsbb - Vector Count Trailing Zero Least-Significant Bits Byte

Signed-off-by: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 target-ppc/helper.h                 |  2 ++
 target-ppc/int_helper.c             | 30 ++++++++++++++++++++++++++++++
 target-ppc/translate/vmx-impl.inc.c | 14 ++++++++++++++
 target-ppc/translate/vmx-ops.inc.c  |  2 ++
 4 files changed, 48 insertions(+)

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 91c2082..796ad45 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -343,6 +343,8 @@ 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_1(vclzlsbb, tl, avr)
+DEF_HELPER_1(vctzlsbb, tl, avr)
 DEF_HELPER_3(vbpermd, void, avr, avr, avr)
 DEF_HELPER_3(vbpermq, void, avr, avr, avr)
 DEF_HELPER_2(vgbbd, void, avr, avr)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 77d6bce..202854f 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -881,6 +881,36 @@ VCT(uxs, cvtsduw, u32)
 VCT(sxs, cvtsdsw, s32)
 #undef VCT
 
+target_ulong helper_vclzlsbb(ppc_avr_t *r)
+{
+    target_ulong count = 0;
+    int i;
+    VECTOR_FOR_INORDER_I(i, u8) {
+        if (r->u8[i] & 0x01) {
+            break;
+        }
+        count++;
+    }
+    return count;
+}
+
+target_ulong helper_vctzlsbb(ppc_avr_t *r)
+{
+    target_ulong count = 0;
+    int i;
+#if defined(HOST_WORDS_BIGENDIAN)
+    for (i = ARRAY_SIZE(r->u8) - 1; i >= 0; i--) {
+#else
+    for (i = 0; i < ARRAY_SIZE(r->u8); i++) {
+#endif
+        if (r->u8[i] & 0x01) {
+            break;
+        }
+        count++;
+    }
+    return count;
+}
+
 void helper_vmhaddshs(CPUPPCState *env, ppc_avr_t *r, ppc_avr_t *a,
                       ppc_avr_t *b, ppc_avr_t *c)
 {
diff --git a/target-ppc/translate/vmx-impl.inc.c b/target-ppc/translate/vmx-impl.inc.c
index fd06abc..f646e85 100644
--- a/target-ppc/translate/vmx-impl.inc.c
+++ b/target-ppc/translate/vmx-impl.inc.c
@@ -593,6 +593,18 @@ static void glue(gen_, name)(DisasContext *ctx)                         \
         tcg_temp_free_ptr(rd);                                          \
     }
 
+#define GEN_VXFORM_NOA_3(name, opc2, opc3, opc4)                        \
+static void glue(gen_, name)(DisasContext *ctx)                         \
+    {                                                                   \
+        TCGv_ptr rb;                                                    \
+        if (unlikely(!ctx->altivec_enabled)) {                          \
+            gen_exception(ctx, POWERPC_EXCP_VPU);                       \
+            return;                                                     \
+        }                                                               \
+        rb = gen_avr_ptr(rB(ctx->opcode));                              \
+        gen_helper_##name(cpu_gpr[rD(ctx->opcode)], rb);                \
+        tcg_temp_free_ptr(rb);                                          \
+    }
 GEN_VXFORM_NOA(vupkhsb, 7, 8);
 GEN_VXFORM_NOA(vupkhsh, 7, 9);
 GEN_VXFORM_NOA(vupkhsw, 7, 25);
@@ -807,6 +819,8 @@ GEN_VXFORM_NOA_2(vctzb, 1, 24, 28)
 GEN_VXFORM_NOA_2(vctzh, 1, 24, 29)
 GEN_VXFORM_NOA_2(vctzw, 1, 24, 30)
 GEN_VXFORM_NOA_2(vctzd, 1, 24, 31)
+GEN_VXFORM_NOA_3(vclzlsbb, 1, 24, 0)
+GEN_VXFORM_NOA_3(vctzlsbb, 1, 24, 1)
 GEN_VXFORM_NOA(vpopcntb, 1, 28)
 GEN_VXFORM_NOA(vpopcnth, 1, 29)
 GEN_VXFORM_NOA(vpopcntw, 1, 30)
diff --git a/target-ppc/translate/vmx-ops.inc.c b/target-ppc/translate/vmx-ops.inc.c
index 1edb353..b63e33d 100644
--- a/target-ppc/translate/vmx-ops.inc.c
+++ b/target-ppc/translate/vmx-ops.inc.c
@@ -219,6 +219,8 @@ GEN_VXFORM_300_EO(vctzb, 0x01, 0x18, 0x1C),
 GEN_VXFORM_300_EO(vctzh, 0x01, 0x18, 0x1D),
 GEN_VXFORM_300_EO(vctzw, 0x01, 0x18, 0x1E),
 GEN_VXFORM_300_EO(vctzd, 0x01, 0x18, 0x1F),
+GEN_VXFORM_300_EO(vclzlsbb, 0x01, 0x18, 0x0),
+GEN_VXFORM_300_EO(vctzlsbb, 0x01, 0x18, 0x1),
 GEN_VXFORM_300(vpermr, 0x1D, 0xFF),
 
 #define GEN_VXFORM_NOA(name, opc2, opc3)                                \
-- 
2.7.4