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[Qemu-devel] [PATCH 08/14] Add vmaddfp and vnmsubfp instructions
From: |
Nathan Froyd |
Subject: |
[Qemu-devel] [PATCH 08/14] Add vmaddfp and vnmsubfp instructions |
Date: |
Thu, 22 Jan 2009 12:44:08 -0800 |
Do the computation in higher precision and check for invalid operation
conditions.
Signed-off-by: Nathan Froyd <address@hidden>
---
target-ppc/helper.h | 2 +
target-ppc/op_helper.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++
target-ppc/translate.c | 1 +
3 files changed, 57 insertions(+), 0 deletions(-)
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index a5d1972..6f5d6a6 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -236,6 +236,8 @@ 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_4(vmaddfp, void, avr, avr, avr, avr)
+DEF_HELPER_4(vnmsubfp, void, avr, avr, avr, avr)
DEF_HELPER_1(efscfsi, i32, i32)
DEF_HELPER_1(efscfui, i32, i32)
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index d952113..532a08a 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -2223,6 +2223,29 @@ VCMP(gtsw, >, s32)
#undef VCMP_DO
#undef VCMP
+void helper_vmaddfp (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, ppc_avr_t *c)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(r->f); i++) {
+ HANDLE_NAN3(r->f[i], a->f[i], b->f[i], c->f[i]) {
+ /* Need to do the computation in higher precision and round
+ * once at the end. */
+ float64 af, cf;
+ af = float32_to_float64(a->f[i], &env->vec_status);
+ cf = float32_to_float64(c->f[i], &env->vec_status);
+ if ((float64_is_infinity(af) && float64_is_zero(cf)) ||
+ (float64_is_zero(af) && float64_is_infinity(cf))) {
+ r->u32[i] = 0x7fc00000;
+ } else {
+ float64 t = float64_mul(af, cf, &env->vec_status);
+ float64 bf = float32_to_float64(b->f[i], &env->vec_status);
+ t = float64_add(t, bf, &env->vec_status);
+ r->f[i] = float64_to_float32(t, &env->vec_status);
+ }
+ }
+ }
+}
+
void helper_vmhaddshs (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, ppc_avr_t *c)
{
int sat = 0;
@@ -2460,6 +2483,37 @@ VMUL(uh, u16, u32)
#undef VMUL_DO
#undef VMUL
+void helper_vnmsubfp (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, ppc_avr_t *c)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(r->f); i++) {
+ HANDLE_NAN3(r->f[i], a->f[i], b->f[i], c->f[i]) {
+ /* Need to do the computation is higher precision and round
+ * once at the end. */
+ float64 af, cf;
+ af = float32_to_float64(a->f[i], &env->vec_status);
+ cf = float32_to_float64(c->f[i], &env->vec_status);
+ if ((float64_is_infinity(af) && float64_is_zero(cf)) ||
+ (float64_is_zero(af) && float64_is_infinity(cf))) {
+ r->u32[i] = 0x7fc00000;
+ } else {
+ float64 t = float64_mul(af, cf, &env->vec_status);
+ float64 bf = float32_to_float64(b->f[i], &env->vec_status);
+ if (unlikely(float64_is_infinity(t) &&
+ float64_is_infinity(bf) &&
+ float64_is_neg(t) == float64_is_neg(bf))) {
+ /* Magnitude subtraction of infinities */
+ r->u32[i] = 0x7fc00000;
+ } else {
+ t = float64_sub(t, bf, &env->vec_status);
+ t = float64_chs(t);
+ r->f[i] = float64_to_float32(t, &env->vec_status);
+ }
+ }
+ }
+ }
+}
+
void helper_vperm (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, ppc_avr_t *c)
{
ppc_avr_t result;
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 6ff46e0..8b67333 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -6577,6 +6577,7 @@ GEN_VAFORM_PAIRED(vmsumubm, vmsummbm, 18)
GEN_VAFORM_PAIRED(vmsumuhm, vmsumuhs, 19)
GEN_VAFORM_PAIRED(vmsumshm, vmsumshs, 20)
GEN_VAFORM_PAIRED(vsel, vperm, 21)
+GEN_VAFORM_PAIRED(vmaddfp, vnmsubfp, 23)
/*** SPE extension ***/
/* Register moves */
--
1.6.0.5
- [Qemu-devel] [PATCH 14/14] Add vrsqrtefp instruction, (continued)
- [Qemu-devel] [PATCH 14/14] Add vrsqrtefp instruction, Nathan Froyd, 2009/01/22
- [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 <=
- [Qemu-devel] [PATCH 07/14] Add v{add,sub}fp instructions, Nathan Froyd, 2009/01/22
- [Qemu-devel] [PATCH 06/14] Add v{max,min}fp instructions, Nathan Froyd, 2009/01/22