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[Qemu-devel] [PATCH v2 4/5] target-ppc: use the softfloat float32_muladd
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH v2 4/5] target-ppc: use the softfloat float32_muladd function |
Date: |
Tue, 11 Sep 2012 20:47:12 +0200 |
Use the new softfloat float32_muladd() function to implement the vmaddfp
and vnmsubfp instructions. As a bonus we can get rid of the call to the
HANDLE_NAN3 macro, as the NaN handling is directly done at the softfloat
level.
Cc: Alexander Graf <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
target-ppc/int_helper.c | 57 ++++++++++++-----------------------------------
1 file changed, 14 insertions(+), 43 deletions(-)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 6141243..6f9beff 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -418,6 +418,20 @@ VARITHFP(minfp, float32_min)
VARITHFP(maxfp, float32_max)
#undef VARITHFP
+#define VARITHFPFMA(suffix, type) \
+ void helper_v##suffix(CPUPPCState *env, 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++) { \
+ r->f[i] = float32_muladd(a->f[i], c->f[i], b->f[i], \
+ type, &env->vec_status); \
+ } \
+ }
+VARITHFPFMA(maddfp, 0);
+VARITHFPFMA(nmsubfp, float_muladd_negate_result | float_muladd_negate_c);
+#undef VARITHFPFMA
+
#define VARITHSAT_CASE(type, op, cvt, element) \
{ \
type result = (type)a->element[i] op (type)b->element[i]; \
@@ -649,27 +663,6 @@ VCT(uxs, cvtsduw, u32)
VCT(sxs, cvtsdsw, s32)
#undef VCT
-void helper_vmaddfp(CPUPPCState *env, 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, bf, cf, t;
-
- af = float32_to_float64(a->f[i], &env->vec_status);
- bf = float32_to_float64(b->f[i], &env->vec_status);
- cf = float32_to_float64(c->f[i], &env->vec_status);
- t = float64_mul(af, cf, &env->vec_status);
- t = float64_add(t, bf, &env->vec_status);
- r->f[i] = float64_to_float32(t, &env->vec_status);
- }
- }
-}
-
void helper_vmhaddshs(CPUPPCState *env, ppc_avr_t *r, ppc_avr_t *a,
ppc_avr_t *b, ppc_avr_t *c)
{
@@ -909,28 +902,6 @@ VMUL(uh, u16, u32)
#undef VMUL_DO
#undef VMUL
-void helper_vnmsubfp(CPUPPCState *env, 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, bf, cf, t;
-
- af = float32_to_float64(a->f[i], &env->vec_status);
- bf = float32_to_float64(b->f[i], &env->vec_status);
- cf = float32_to_float64(c->f[i], &env->vec_status);
- t = float64_mul(af, cf, &env->vec_status);
- 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(CPUPPCState *env, ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b,
ppc_avr_t *c)
{
--
1.7.10.4
- [Qemu-devel] [PATCH v2 0/5] target-ppc: get rid of manual NaN handling in vector functions, Aurelien Jarno, 2012/09/11
- [Qemu-devel] [PATCH v2 5/5] target-ppc: get rid of the HANDLE_NAN{1, 2, 3} macros, Aurelien Jarno, 2012/09/11
- [Qemu-devel] [PATCH v2 1/5] softfloat: make float_muladd_negate_* flags independent, Aurelien Jarno, 2012/09/11
- [Qemu-devel] [PATCH v2 4/5] target-ppc: use the softfloat float32_muladd function,
Aurelien Jarno <=
- [Qemu-devel] [PATCH v2 3/5] target-ppc: use the softfloat min/max functions, Aurelien Jarno, 2012/09/11
- [Qemu-devel] [PATCH v2 2/5] target-ppc: simplify NaN propagation for vector functions, Aurelien Jarno, 2012/09/11