Re: [Qemu-devel] [PATCH 13/14] Add vrefp instruction

[Nathan Froyd <froydnj@codesourcery.com>]

Use float32_one constant to avoid repeated conversions.  Let the
softfloat code handle any special cases.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
---
 target-ppc/helper.h    |    1 +
 target-ppc/op_helper.c |   10 ++++++++++
 target-ppc/translate.c |    1 +
 3 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 3ee04b2..00a573c 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -244,6 +244,7 @@ DEF_HELPER_3(vaddfp, void, avr, avr, avr)
 DEF_HELPER_3(vsubfp, void, avr, avr, avr)
 DEF_HELPER_3(vmaxfp, void, avr, avr, avr)
 DEF_HELPER_3(vminfp, void, avr, avr, avr)
+DEF_HELPER_2(vrefp, void, avr, avr)
 DEF_HELPER_4(vmaddfp, void, avr, avr, avr, avr)
 DEF_HELPER_4(vnmsubfp, void, avr, avr, avr, avr)
 DEF_HELPER_2(vlogefp, void, avr, avr)
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index e4c446d..0e78e23 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -2664,6 +2664,16 @@ VPK(uwum, u32, u16, I, 0)
 #undef VPK
 #undef PKBIG
 
+void helper_vrefp (ppc_avr_t *r, ppc_avr_t *b)
+{
+    int i;
+    for (i = 0; i < ARRAY_SIZE(r->f); i++) {
+        HANDLE_NAN1(r->f[i], b->f[i]) {
+            r->f[i] = float32_div(float32_one, b->f[i], &env->vec_status);
+        }
+    }
+}
+
 #define VRFI(suffix, rounding)                                          \
     void helper_vrfi##suffix (ppc_avr_t *r, ppc_avr_t *b)               \
     {                                                                   \
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 4d5b45a..46bd177 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -6476,6 +6476,7 @@ GEN_VXFORM_NOA(vupklsb, 7, 10);
 GEN_VXFORM_NOA(vupklsh, 7, 11);
 GEN_VXFORM_NOA(vupkhpx, 7, 13);
 GEN_VXFORM_NOA(vupklpx, 7, 15);
+GEN_VXFORM_NOA(vrefp, 5, 4);
 GEN_VXFORM_NOA(vlogefp, 5, 7);
 GEN_VXFORM_NOA(vrfim, 5, 8);
 GEN_VXFORM_NOA(vrfin, 5, 9);
-- 
1.6.0.5