diff mbox series

[RFC,1/2] target/ppc/cpu: Add hardfloat property

Message ID 82d245d64615e337c604ea330cffffea84cbd61c.1581904461.git.balaton@eik.bme.hu
State New
Headers show
Series Enable hardfloat for PPC | expand

Commit Message

BALATON Zoltan Feb. 17, 2020, 12:14 a.m. UTC 
Add a property to allow setting a flag in cpu env that will be used to
control if hardfloat is used for floating point ops (i.e. speed is
preferred over accuracy).

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 target/ppc/cpu.h                | 2 ++
 target/ppc/translate_init.inc.c | 2 ++
 2 files changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index b283042515..1b258a5db5 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1033,6 +1033,7 @@  struct CPUPPCState {
     float_status vec_status;
     float_status fp_status; /* Floating point execution context */
     target_ulong fpscr;     /* Floating point status and control register */
+    bool hardfloat;         /* use hardfloat (this breaks FPSCR[FI] bit) */
 
     /* Internal devices resources */
     ppc_tb_t *tb_env;      /* Time base and decrementer */
@@ -1163,6 +1164,7 @@  struct PowerPCCPU {
     void *machine_data;
     int32_t node_id; /* NUMA node this CPU belongs to */
     PPCHash64Options *hash64_opts;
+    bool hardfloat; /* pass on property to env */
 
     /* Those resources are used only during code translation */
     /* opcode handlers */
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
index 53995f62ea..d6e1d66bc8 100644
--- a/target/ppc/translate_init.inc.c
+++ b/target/ppc/translate_init.inc.c
@@ -10736,6 +10736,7 @@  static void ppc_cpu_reset(CPUState *s)
     /* tininess for underflow is detected before rounding */
     set_float_detect_tininess(float_tininess_before_rounding,
                               &env->fp_status);
+    env->hardfloat = cpu->hardfloat;
 
     for (i = 0; i < ARRAY_SIZE(env->spr_cb); i++) {
         ppc_spr_t *spr = &env->spr_cb[i];
@@ -10868,6 +10869,7 @@  static Property ppc_cpu_properties[] = {
                      false),
     DEFINE_PROP_BOOL("pre-3.0-migration", PowerPCCPU, pre_3_0_migration,
                      false),
+    DEFINE_PROP_BOOL("hardfloat", PowerPCCPU, hardfloat, false),
     DEFINE_PROP_END_OF_LIST(),
 };