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[v2,10/10] target-arm: Give the FPSCR rounding modes names

Message ID 1388421275-2035-11-git-send-email-peter.maydell@linaro.org
State New
Headers show

Commit Message

Peter Maydell Dec. 30, 2013, 4:34 p.m. UTC 
From: Alexander Graf <agraf@suse.de>

When setting rounding modes we currently just hardcode the numeric values
for rounding modes in a big switch statement.

With AArch64 support coming, we will need to refer to these rounding modes
at different places throughout the code though, so let's better give them
names so we don't get confused by accident.

Signed-off-by: Alexander Graf <agraf@suse.de>
[WN: Commit message tweak, use names from ARM ARM.]
Signed-off-by: Will Newton <will.newton@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
---
 target-arm/cpu.h    | 9 +++++++++
 target-arm/helper.c | 8 ++++----
 2 files changed, 13 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 6c84e22..1a32907 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -487,6 +487,15 @@  static inline void vfp_set_fpcr(CPUARMState *env, uint32_t val)
     vfp_set_fpscr(env, new_fpscr);
 }
 
+enum arm_fprounding {
+    FPROUNDING_TIEEVEN,
+    FPROUNDING_POSINF,
+    FPROUNDING_NEGINF,
+    FPROUNDING_ZERO,
+    FPROUNDING_TIEAWAY,
+    FPROUNDING_ODD
+};
+
 enum arm_cpu_mode {
   ARM_CPU_MODE_USR = 0x10,
   ARM_CPU_MODE_FIQ = 0x11,
diff --git a/target-arm/helper.c b/target-arm/helper.c
index d1ed6b0..b157c55 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -3815,16 +3815,16 @@  void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
     if (changed & (3 << 22)) {
         i = (val >> 22) & 3;
         switch (i) {
-        case 0:
+        case FPROUNDING_TIEEVEN:
             i = float_round_nearest_even;
             break;
-        case 1:
+        case FPROUNDING_POSINF:
             i = float_round_up;
             break;
-        case 2:
+        case FPROUNDING_NEGINF:
             i = float_round_down;
             break;
-        case 3:
+        case FPROUNDING_ZERO:
             i = float_round_to_zero;
             break;
         }