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[Qemu-devel] [PULL 2.0 03/15] softfloat: Introduce float32_to_uint64_rou
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PULL 2.0 03/15] softfloat: Introduce float32_to_uint64_round_to_zero |
Date: |
Tue, 8 Apr 2014 11:31:42 +0200 |
From: Tom Musta <address@hidden>
This change adds the float32_to_uint64_round_to_zero function to the softfloat
library. This function fills out the complement of float32 to INT round-to-zero
conversion rountines, where INT is {int32_t, uint32_t, int64_t, uint64_t}.
This contribution can be licensed under either the softfloat-2a or -2b
license.
Signed-off-by: Tom Musta <address@hidden>
Tested-by: Tom Musta <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Signed-off-by: Alexander Graf <address@hidden>
---
fpu/softfloat.c | 20 ++++++++++++++++++++
include/fpu/softfloat.h | 1 +
2 files changed, 21 insertions(+)
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 5f02c16..e00a6fb 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -1628,6 +1628,26 @@ uint64 float32_to_uint64(float32 a STATUS_PARAM)
/*----------------------------------------------------------------------------
| Returns the result of converting the single-precision floating-point value
+| `a' to the 64-bit unsigned integer format. The conversion is
+| performed according to the IEC/IEEE Standard for Binary Floating-Point
+| Arithmetic, except that the conversion is always rounded toward zero. If
+| `a' is a NaN, the largest unsigned integer is returned. Otherwise, if the
+| conversion overflows, the largest unsigned integer is returned. If the
+| 'a' is negative, the result is rounded and zero is returned; values that do
+| not round to zero will raise the inexact flag.
+*----------------------------------------------------------------------------*/
+
+uint64 float32_to_uint64_round_to_zero(float32 a STATUS_PARAM)
+{
+ signed char current_rounding_mode = STATUS(float_rounding_mode);
+ set_float_rounding_mode(float_round_to_zero STATUS_VAR);
+ int64_t v = float32_to_uint64(a STATUS_VAR);
+ set_float_rounding_mode(current_rounding_mode STATUS_VAR);
+ return v;
+}
+
+/*----------------------------------------------------------------------------
+| Returns the result of converting the single-precision floating-point value
| `a' to the 64-bit two's complement integer format. The conversion is
| performed according to the IEC/IEEE Standard for Binary Floating-Point
| Arithmetic, except that the conversion is always rounded toward zero. If
diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index db878c1..4b3090c 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -342,6 +342,7 @@ uint32 float32_to_uint32( float32 STATUS_PARAM );
uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
int64 float32_to_int64( float32 STATUS_PARAM );
uint64 float32_to_uint64(float32 STATUS_PARAM);
+uint64 float32_to_uint64_round_to_zero(float32 STATUS_PARAM);
int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM );
float64 float32_to_float64( float32 STATUS_PARAM );
floatx80 float32_to_floatx80( float32 STATUS_PARAM );
--
1.8.1.4
- [Qemu-devel] [PULL 2.0 00/15] ppc patch queue 2014-04-08 for 2.0, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 05/15] target-ppc: Define Endian-Correct Accessors for VSR Field Access, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 01/15] PPC: E500: Set PIR default reset value rather than SPR value, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 03/15] softfloat: Introduce float32_to_uint64_round_to_zero,
Alexander Graf <=
- [Qemu-devel] [PULL 2.0 06/15] target-ppc: Correct LE Host Inversion of Lower VSRs, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 13/15] PPC: Only enter MSR_POW when no interrupts pending, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 09/15] target-ppc: Correct VSX FP to FP Conversions, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 12/15] PPC: Clean up DECR implementation, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 07/15] target-ppc: Correct Simple VSR LE Host Inversions, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 10/15] target-ppc: Correct VSX FP to Integer Conversion, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 08/15] target-ppc: Correct VSX Scalar Compares, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 15/15] PPC: Add l1 cache sizes for 970 and above systems, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 14/15] ppce500_spin: Initialize struct properly, Alexander Graf, 2014/04/08
- [Qemu-devel] [PULL 2.0 11/15] target-ppc: Correct VSX Integer to FP Conversion, Alexander Graf, 2014/04/08