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[Qemu-devel] [PATCH 07/14] Add v{add,sub}fp instructions
From: |
Nathan Froyd |
Subject: |
[Qemu-devel] [PATCH 07/14] Add v{add,sub}fp instructions |
Date: |
Thu, 22 Jan 2009 12:44:07 -0800 |
Split up vaddfp and vsubfp so that we can properly handle magnitude
subtraction of infinities.
Signed-off-by: Nathan Froyd <address@hidden>
---
target-ppc/helper.h | 2 ++
target-ppc/op_helper.c | 27 +++++++++++++++++++++++++++
target-ppc/translate.c | 2 ++
3 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index ebdeabe..a5d1972 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -232,6 +232,8 @@ DEF_HELPER_3(vsum2sws, void, avr, avr, avr)
DEF_HELPER_3(vsum4sbs, void, avr, avr, avr)
DEF_HELPER_3(vsum4shs, void, avr, avr, avr)
DEF_HELPER_3(vsum4ubs, void, avr, avr, avr)
+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)
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index 717bbd4..d952113 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -2102,6 +2102,33 @@ VARITH(uwm, u32)
#undef VARITH_DO
#undef VARITH
+void helper_vaddfp (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(r->f); i++) {
+ HANDLE_NAN2(r->f[i], a->f[i], b->f[i]) {
+ r->f[i] = float32_add(a->f[i], b->f[i], &env->vec_status);
+ }
+ }
+}
+
+void helper_vsubfp (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(r->f); i++) {
+ HANDLE_NAN2(r->f[i], a->f[i], b->f[i]) {
+ if (unlikely(float32_is_infinity(a->f[i]) &&
+ float32_is_infinity(b->f[i]) &&
+ float32_is_neg(a->f[i]) == float32_is_neg(b->f[i]))) {
+ /* Magnitude subtraction of infinities */
+ r->u32[i] = 0x7fc00000;
+ } else {
+ r->f[i] = float32_sub(a->f[i], b->f[i], &env->vec_status);
+ }
+ }
+ }
+}
+
#define VARITHSAT_CASE(type, op, cvt, element) \
{ \
type result = (type)a->element[i] op (type)b->element[i]; \
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 35693e0..6ff46e0 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -6395,6 +6395,8 @@ GEN_VXFORM(vsum4sbs, 4, 28);
GEN_VXFORM(vsum4shs, 4, 25);
GEN_VXFORM(vsum2sws, 4, 26);
GEN_VXFORM(vsumsws, 4, 30);
+GEN_VXFORM(vaddfp, 5, 0);
+GEN_VXFORM(vsubfp, 5, 1);
GEN_VXFORM(vmaxfp, 5, 10);
GEN_VXFORM(vminfp, 5, 11);
--
1.6.0.5
- [Qemu-devel] [PATCH 09/14] Add vcmp{eq,ge,gt,b}fp{,.} instructions, (continued)
- [Qemu-devel] [PATCH 09/14] Add vcmp{eq,ge,gt,b}fp{,.} instructions, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 13/14] Add vrefp instruction, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 01/14] Add f field to ppc_avr_t, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 10/14] Add vrfi{m,n,p,z} instructions, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 12/14] Add vct{u,s}xs instructions, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 02/14] Add various NaN-handling macros, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 04/14] Add calls to initialize VSCR on appropriate machines, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 11/14] Add vcf{u,s}x instructions, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 03/14] Rename spe_status to vec_status, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 08/14] Add vmaddfp and vnmsubfp instructions, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 07/14] Add v{add,sub}fp instructions,
Nathan Froyd <=
- [Qemu-devel] [PATCH 06/14] Add v{max,min}fp instructions, Nathan Froyd, 2009/01/22