[RFC PATCH 5/6] target/ppc: implement xscv[su]qqp

[matheus . ferst]

From: Matheus Ferst <matheus.ferst@eldorado.org.br>

Implement the following PowerISA v3.1 instructions:
xscvsqqp: VSX Scalar Convert with round Signed Quadword to
          Quad-Precision
xscvuqqp: VSX Scalar Convert with round Unsigned Quadword to
          Quad-Precision format

Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
---
 target/ppc/fpu_helper.c             | 11 +++++++++++
 target/ppc/helper.h                 |  2 ++
 target/ppc/insn32.decode            |  5 +++++
 target/ppc/translate/vsx-impl.c.inc | 20 ++++++++++++++++++++
 4 files changed, 38 insertions(+)

diff --git a/target/ppc/fpu_helper.c b/target/ppc/fpu_helper.c
index 7e8be99cc0..5101ba92ae 100644
--- a/target/ppc/fpu_helper.c
+++ b/target/ppc/fpu_helper.c
@@ -3058,6 +3058,17 @@ void helper_##op(CPUPPCState *env, ppc_vsr_t *xt, 
ppc_vsr_t *xb)        \
 VSX_CVT_INT_TO_FP2(xvcvsxdsp, int64, float32)
 VSX_CVT_INT_TO_FP2(xvcvuxdsp, uint64, float32)
 
+#define VSX_CVT_INT128_TO_FP(op, tp)                                        \
+void helper_##op(CPUPPCState *env, ppc_vsr_t *xt, ppc_vsr_t *xb)            \
+{                                                                           \
+    xt->f128 = tp##_to_float128(xb->VsrD(0), xb->VsrD(1), &env->fp_status); \
+    helper_compute_fprf_float128(env, xt->f128);                            \
+    do_float_check_status(env, GETPC());                                    \
+}
+
+VSX_CVT_INT128_TO_FP(XSCVUQQP, uint128);
+VSX_CVT_INT128_TO_FP(XSCVSQQP, int128);
+
 /*
  * VSX_CVT_INT_TO_FP_VECTOR - VSX integer to floating point conversion
  *   op    - instruction mnemonic
diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index 57da11c77e..7df0c01819 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -388,6 +388,8 @@ DEF_HELPER_4(xscvqpsdz, void, env, i32, vsr, vsr)
 DEF_HELPER_4(xscvqpswz, void, env, i32, vsr, vsr)
 DEF_HELPER_4(xscvqpudz, void, env, i32, vsr, vsr)
 DEF_HELPER_4(xscvqpuwz, void, env, i32, vsr, vsr)
+DEF_HELPER_3(XSCVUQQP, void, env, vsr, vsr)
+DEF_HELPER_3(XSCVSQQP, void, env, vsr, vsr)
 DEF_HELPER_3(xscvhpdp, void, env, vsr, vsr)
 DEF_HELPER_4(xscvsdqp, void, env, i32, vsr, vsr)
 DEF_HELPER_3(xscvspdp, void, env, vsr, vsr)
diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index ac2d3da9a7..6fb568c1fe 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -91,6 +91,9 @@
 
 @X_tp_a_bp_rc   ...... ....0 ra:5 ....0 .......... rc:1         &X_rc 
rt=%x_frtp rb=%x_frbp
 
+&X_tb           rt rb
+@X_tb           ...... rt:5 ..... rb:5 .......... .             &X_tb
+
 &X_tb_rc        rt rb rc:bool
 @X_tb_rc        ...... rt:5 ..... rb:5 .......... rc:1          &X_tb_rc
 
@@ -692,6 +695,8 @@ XSCMPGTQP       111111 ..... ..... ..... 0011100100 -   @X
 ## VSX Binary Floating-Point Convert Instructions
 
 XSCVQPDP        111111 ..... 10100 ..... 1101000100 .   @X_tb_rc
+XSCVUQQP        111111 ..... 00011 ..... 1101000100 -   @X_tb
+XSCVSQQP        111111 ..... 01011 ..... 1101000100 -   @X_tb
 XVCVBF16SPN     111100 ..... 10000 ..... 111011011 ..   @XX2
 XVCVSPBF16      111100 ..... 10001 ..... 111011011 ..   @XX2
 
diff --git a/target/ppc/translate/vsx-impl.c.inc 
b/target/ppc/translate/vsx-impl.c.inc
index d1f6333314..a305579ecc 100644
--- a/target/ppc/translate/vsx-impl.c.inc
+++ b/target/ppc/translate/vsx-impl.c.inc
@@ -838,6 +838,26 @@ static bool trans_XSCVQPDP(DisasContext *ctx, arg_X_tb_rc 
*a)
     return true;
 }
 
+static bool do_helper_env_X_tb(DisasContext *ctx, arg_X_tb *a,
+                               void (*gen_helper)(TCGv_ptr, TCGv_ptr, 
TCGv_ptr))
+{
+    TCGv_ptr xt, xb;
+
+    REQUIRE_INSNS_FLAGS2(ctx, ISA310);
+    REQUIRE_VSX(ctx);
+
+    xt = gen_avr_ptr(a->rt);
+    xb = gen_avr_ptr(a->rb);
+    gen_helper(cpu_env, xt, xb);
+    tcg_temp_free_ptr(xt);
+    tcg_temp_free_ptr(xb);
+
+    return true;
+}
+
+TRANS(XSCVUQQP, do_helper_env_X_tb, gen_helper_XSCVUQQP)
+TRANS(XSCVSQQP, do_helper_env_X_tb, gen_helper_XSCVSQQP)
+
 #define GEN_VSX_HELPER_2(name, op1, op2, inval, type)                         \
 static void gen_##name(DisasContext *ctx)                                     \
 {                                                                             \
-- 
2.25.1