Patchwork [5/9] target-sh4: define FPSCR constants

login
register
mail settings
Submitter Aurelien Jarno
Date Jan. 11, 2011, 9:01 p.m.
Message ID <1294779698-17694-6-git-send-email-aurelien@aurel32.net>
Download mbox | patch
Permalink /patch/78446/
State New
Headers show

Comments

Aurelien Jarno - Jan. 11, 2011, 9:01 p.m.
Define FPSCR constants for all field and use them instead of hardcoded
values.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 target-sh4/cpu.h       |   35 +++++++++++++++++++++++++++++++----
 target-sh4/op_helper.c |    7 ++++---
 target-sh4/translate.c |    4 ++--
 3 files changed, 37 insertions(+), 9 deletions(-)

Patch

diff --git a/target-sh4/cpu.h b/target-sh4/cpu.h
index 8ccf25c..fe33b8a 100644
--- a/target-sh4/cpu.h
+++ b/target-sh4/cpu.h
@@ -61,10 +61,37 @@ 
 #define SR_S  (1 << 1)
 #define SR_T  (1 << 0)
 
-#define FPSCR_FR (1 << 21)
-#define FPSCR_SZ (1 << 20)
-#define FPSCR_PR (1 << 19)
-#define FPSCR_DN (1 << 18)
+#define FPSCR_MASK             (0x003fffff)
+#define FPSCR_FR               (1 << 21)
+#define FPSCR_SZ               (1 << 20)
+#define FPSCR_PR               (1 << 19)
+#define FPSCR_DN               (1 << 18)
+#define FPSCR_CAUSE_MASK       (0x3f << 12)
+#define FPSCR_CAUSE_SHIFT      (12)
+#define FPSCR_CAUSE_E          (1 << 17)
+#define FPSCR_CAUSE_V          (1 << 16)
+#define FPSCR_CAUSE_Z          (1 << 15)
+#define FPSCR_CAUSE_O          (1 << 14)
+#define FPSCR_CAUSE_U          (1 << 13)
+#define FPSCR_CAUSE_I          (1 << 12)
+#define FPSCR_ENABLE_MASK      (0x1f << 7)
+#define FPSCR_ENABLE_SHIFT     (7)
+#define FPSCR_ENABLE_V         (1 << 11)
+#define FPSCR_ENABLE_Z         (1 << 10)
+#define FPSCR_ENABLE_O         (1 << 9)
+#define FPSCR_ENABLE_U         (1 << 8)
+#define FPSCR_ENABLE_I         (1 << 7)
+#define FPSCR_FLAG_MASK        (0x1f << 2)
+#define FPSCR_FLAG_SHIFT       (2)
+#define FPSCR_FLAG_V           (1 << 6)
+#define FPSCR_FLAG_Z           (1 << 5)
+#define FPSCR_FLAG_O           (1 << 4)
+#define FPSCR_FLAG_U           (1 << 3)
+#define FPSCR_FLAG_I           (1 << 2)
+#define FPSCR_RM_MASK          (0x03 << 0)
+#define FPSCR_RM_NEAREST       (0 << 0)
+#define FPSCR_RM_ZERO          (1 << 0)
+
 #define DELAY_SLOT             (1 << 0)
 #define DELAY_SLOT_CONDITIONAL (1 << 1)
 #define DELAY_SLOT_TRUE        (1 << 2)
diff --git a/target-sh4/op_helper.c b/target-sh4/op_helper.c
index d8d0bb4..9915e42 100644
--- a/target-sh4/op_helper.c
+++ b/target-sh4/op_helper.c
@@ -428,11 +428,12 @@  static inline void clr_t(void)
 
 void helper_ld_fpscr(uint32_t val)
 {
-    env->fpscr = val & 0x003fffff;
-    if (val & 0x01)
+    env->fpscr = val & FPSCR_MASK;
+    if ((val & FPSCR_RM_MASK) == FPSCR_RM_ZERO) {
 	set_float_rounding_mode(float_round_to_zero, &env->fp_status);
-    else
+    } else {
 	set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
+    }
 }
 
 uint32_t helper_fabs_FT(uint32_t t0)
diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index 8d59bf9..bdfa31a 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -203,10 +203,10 @@  static void cpu_sh4_reset(CPUSH4State * env)
     env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */
     set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */
 #else
-    env->fpscr = 0x00040001; /* CPU reset value according to SH4 manual */
+    env->fpscr = FPSCR_DN | FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */
     set_float_rounding_mode(float_round_to_zero, &env->fp_status);
 #endif
-    set_default_nan_mode(1, &env->vfp.fp_status);
+    set_default_nan_mode(1, &env->fp_status);
     env->mmucr = 0;
 }