[Qemu-ppc] [V4 PATCH 13/14] target-ppc: VSX Stage 4: Add xscvsxdsp and xscvuxdsp

[Tom Musta]

This patch adds the VSX Scalar Convert Unsigned Integer Doubleword
to Floating Point Format and Round to Single Precision (xscvuxdsp)
and VSX Scalar Convert Signed Integer Douglbeword to Floating Point
Format and Round to Single Precision (xscvsxdsp) instructions.

The existing integer to floating point conversion macro (VSX_CVT_INT_TO_FP)
is modified to support the rounding of the intermediate floating point
result to single precision.

V2: updated conversion to single precision range.

Signed-off-by: Tom Musta <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
---
 target-ppc/fpu_helper.c |   27 ++++++++++++++++-----------
 target-ppc/helper.h     |    2 ++
 target-ppc/translate.c  |    4 ++++
 3 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/target-ppc/fpu_helper.c b/target-ppc/fpu_helper.c
index 7926c71..5d35d1c 100644
--- a/target-ppc/fpu_helper.c
+++ b/target-ppc/fpu_helper.c
@@ -2569,7 +2569,7 @@ VSX_CVT_FP_TO_INT(xvcvspuxws, 4, float32, uint32, f32[j], 
u32[i], i, 0)
  *   jdef  - definition of the j index (i or 2*i)
  *   sfprf - set FPRF
  */
-#define VSX_CVT_INT_TO_FP(op, nels, stp, ttp, sfld, tfld, jdef, sfprf)  \
+#define VSX_CVT_INT_TO_FP(op, nels, stp, ttp, sfld, tfld, jdef, sfprf, r2sp) \
 void helper_##op(CPUPPCState *env, uint32_t opcode)                     \
 {                                                                       \
     ppc_vsr_t xt, xb;                                                   \
@@ -2581,6 +2581,9 @@ void helper_##op(CPUPPCState *env, uint32_t opcode)       
              \
     for (i = 0; i < nels; i++) {                                        \
         int j = jdef;                                                   \
         xt.tfld = stp##_to_##ttp(xb.sfld, &env->fp_status);             \
+        if (r2sp) {                                                     \
+            xt.tfld = helper_frsp(env, xt.tfld);                        \
+        }                                                               \
         if (sfprf) {                                                    \
             helper_compute_fprf(env, xt.tfld, sfprf);                   \
         }                                                               \
@@ -2590,20 +2593,22 @@ void helper_##op(CPUPPCState *env, uint32_t opcode)     
                \
     helper_float_check_status(env);                                     \
 }
 
-VSX_CVT_INT_TO_FP(xscvsxddp, 1, int64, float64, u64[j], f64[i], i, 1)
-VSX_CVT_INT_TO_FP(xscvuxddp, 1, uint64, float64, u64[j], f64[i], i, 1)
-VSX_CVT_INT_TO_FP(xvcvsxddp, 2, int64, float64, u64[j], f64[i], i, 0)
-VSX_CVT_INT_TO_FP(xvcvuxddp, 2, uint64, float64, u64[j], f64[i], i, 0)
+VSX_CVT_INT_TO_FP(xscvsxddp, 1, int64, float64, u64[j], f64[i], i, 1, 0)
+VSX_CVT_INT_TO_FP(xscvuxddp, 1, uint64, float64, u64[j], f64[i], i, 1, 0)
+VSX_CVT_INT_TO_FP(xscvsxdsp, 1, int64, float64, u64[j], f64[i], i, 1, 1)
+VSX_CVT_INT_TO_FP(xscvuxdsp, 1, uint64, float64, u64[j], f64[i], i, 1, 1)
+VSX_CVT_INT_TO_FP(xvcvsxddp, 2, int64, float64, u64[j], f64[i], i, 0, 0)
+VSX_CVT_INT_TO_FP(xvcvuxddp, 2, uint64, float64, u64[j], f64[i], i, 0, 0)
 VSX_CVT_INT_TO_FP(xvcvsxwdp, 2, int32, float64, u32[j], f64[i], \
-                  2*i + JOFFSET, 0)
+                  2*i + JOFFSET, 0, 0)
 VSX_CVT_INT_TO_FP(xvcvuxwdp, 2, uint64, float64, u32[j], f64[i], \
-                  2*i + JOFFSET, 0)
+                  2*i + JOFFSET, 0, 0)
 VSX_CVT_INT_TO_FP(xvcvsxdsp, 2, int64, float32, u64[i], f32[j], \
-                  2*i + JOFFSET, 0)
+                  2*i + JOFFSET, 0, 0)
 VSX_CVT_INT_TO_FP(xvcvuxdsp, 2, uint64, float32, u64[i], f32[j], \
-                  2*i + JOFFSET, 0)
-VSX_CVT_INT_TO_FP(xvcvsxwsp, 4, int32, float32, u32[j], f32[i], i, 0)
-VSX_CVT_INT_TO_FP(xvcvuxwsp, 4, uint32, float32, u32[j], f32[i], i, 0)
+                  2*i + JOFFSET, 0, 0)
+VSX_CVT_INT_TO_FP(xvcvsxwsp, 4, int32, float32, u32[j], f32[i], i, 0, 0)
+VSX_CVT_INT_TO_FP(xvcvuxwsp, 4, uint32, float32, u32[j], f32[i], i, 0, 0)
 
 /* For "use current rounding mode", define a value that will not be one of
  * the existing rounding model enums.
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 655b670..6250eba 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -279,6 +279,8 @@ DEF_HELPER_2(xscvdpsxws, void, env, i32)
 DEF_HELPER_2(xscvdpuxds, void, env, i32)
 DEF_HELPER_2(xscvdpuxws, void, env, i32)
 DEF_HELPER_2(xscvsxddp, void, env, i32)
+DEF_HELPER_2(xscvuxdsp, void, env, i32)
+DEF_HELPER_2(xscvsxdsp, void, env, i32)
 DEF_HELPER_2(xscvuxddp, void, env, i32)
 DEF_HELPER_2(xsrdpi, void, env, i32)
 DEF_HELPER_2(xsrdpic, void, env, i32)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 672cf0a..e13bb8f 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -7356,6 +7356,8 @@ GEN_VSX_HELPER_2(xsnmaddasp, 0x04, 0x10, 0, PPC2_VSX207)
 GEN_VSX_HELPER_2(xsnmaddmsp, 0x04, 0x11, 0, PPC2_VSX207)
 GEN_VSX_HELPER_2(xsnmsubasp, 0x04, 0x12, 0, PPC2_VSX207)
 GEN_VSX_HELPER_2(xsnmsubmsp, 0x04, 0x13, 0, PPC2_VSX207)
+GEN_VSX_HELPER_2(xscvsxdsp, 0x10, 0x13, 0, PPC2_VSX207)
+GEN_VSX_HELPER_2(xscvuxdsp, 0x10, 0x12, 0, PPC2_VSX207)
 
 GEN_VSX_HELPER_2(xvadddp, 0x00, 0x0C, 0, PPC2_VSX)
 GEN_VSX_HELPER_2(xvsubdp, 0x00, 0x0D, 0, PPC2_VSX)
@@ -10179,6 +10181,8 @@ GEN_XX3FORM(xsnmaddasp, 0x04, 0x10, PPC2_VSX207),
 GEN_XX3FORM(xsnmaddmsp, 0x04, 0x11, PPC2_VSX207),
 GEN_XX3FORM(xsnmsubasp, 0x04, 0x12, PPC2_VSX207),
 GEN_XX3FORM(xsnmsubmsp, 0x04, 0x13, PPC2_VSX207),
+GEN_XX2FORM(xscvsxdsp, 0x10, 0x13, PPC2_VSX207),
+GEN_XX2FORM(xscvuxdsp, 0x10, 0x12, PPC2_VSX207),
 
 GEN_XX3FORM(xvadddp, 0x00, 0x0C, PPC2_VSX),
 GEN_XX3FORM(xvsubdp, 0x00, 0x0D, PPC2_VSX),
-- 
1.7.1