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[Qemu-devel] [PATCH 16/20] target-i386: add CPU86_LDouble <-> double con
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH 16/20] target-i386: add CPU86_LDouble <-> double conversion functions |
Date: |
Mon, 18 Apr 2011 23:00:08 +0200 |
Add functions to convert CPU86_LDouble to double and vice versa. They
are going to be used to implement logarithmic and trigonometric function
until softfloat implement them.
Signed-off-by: Aurelien Jarno <address@hidden>
---
target-i386/op_helper.c | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c
index 9628d27..f69458d 100644
--- a/target-i386/op_helper.c
+++ b/target-i386/op_helper.c
@@ -3431,6 +3431,28 @@ void helper_verw(target_ulong selector1)
/* x87 FPU helpers */
+static inline double CPU86_LDouble_to_double(CPU86_LDouble a)
+{
+ union {
+ float64 f64;
+ double d;
+ } u;
+
+ u.f64 = floatx_to_float64(a, &env->fp_status);
+ return u.d;
+}
+
+static inline CPU86_LDouble double_to_CPU86_LDouble(double a)
+{
+ union {
+ float64 f64;
+ double d;
+ } u;
+
+ u.d = a;
+ return float64_to_floatx(u.f64, &env->fp_status);
+}
+
static void fpu_set_exception(int mask)
{
env->fpus |= mask;
--
1.7.2.3
- Re: [Qemu-devel] [PATCH 03/20] softfloat: add floatx80 constants, (continued)
- [Qemu-devel] [PATCH 11/20] target-i386: fix helper_flbd_ST0() wrt softfloat, Aurelien Jarno, 2011/04/18
- [Qemu-devel] [PATCH 05/20] softfloat-native: add a few constant values, Aurelien Jarno, 2011/04/18
- [Qemu-devel] [PATCH 01/20] softfloat: fix floatx80 handling of NaN, Aurelien Jarno, 2011/04/18
- [Qemu-devel] [PATCH 16/20] target-i386: add CPU86_LDouble <-> double conversion functions,
Aurelien Jarno <=
- [Qemu-devel] [PATCH 04/20] softfloat: add pi constants, Aurelien Jarno, 2011/04/18
- [Qemu-devel] [PATCH 07/20] softfloat: fix float*_scalnb() corner cases, Aurelien Jarno, 2011/04/18
- [Qemu-devel] [PATCH 12/20] target-i386: fix helper_fxtract() wrt softfloat, Aurelien Jarno, 2011/04/18
- [Qemu-devel] [PATCH 06/20] softfloat: add floatx80_compare*() functions, Aurelien Jarno, 2011/04/18