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[PULL 12/23] softfloat: add uint128_to_float128
From: |
Daniel Henrique Barboza |
Subject: |
[PULL 12/23] softfloat: add uint128_to_float128 |
Date: |
Wed, 20 Apr 2022 19:13:18 -0300 |
From: Matheus Ferst <matheus.ferst@eldorado.org.br>
Based on parts_uint_to_float, implements uint128_to_float128 to convert
an unsigned 128-bit value received through an Int128 argument.
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220330175932.6995-4-matheus.ferst@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
fpu/softfloat.c | 25 +++++++++++++++++++++++++
include/fpu/softfloat.h | 2 ++
2 files changed, 27 insertions(+)
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 7f524d4377..57445b36e7 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -3969,6 +3969,31 @@ float128 uint64_to_float128(uint64_t a, float_status
*status)
return float128_round_pack_canonical(&p, status);
}
+float128 uint128_to_float128(Int128 a, float_status *status)
+{
+ FloatParts128 p = { };
+ int shift;
+
+ if (int128_nz(a)) {
+ p.cls = float_class_normal;
+
+ shift = clz64(int128_gethi(a));
+ if (shift == 64) {
+ shift += clz64(int128_getlo(a));
+ }
+
+ p.exp = 127 - shift;
+ a = int128_lshift(a, shift);
+
+ p.frac_hi = int128_gethi(a);
+ p.frac_lo = int128_getlo(a);
+ } else {
+ p.cls = float_class_zero;
+ }
+
+ return float128_round_pack_canonical(&p, status);
+}
+
/*
* Minimum and maximum
*/
diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index d34b2c44d2..8e026e5610 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -95,6 +95,7 @@ typedef enum {
#include "fpu/softfloat-types.h"
#include "fpu/softfloat-helpers.h"
+#include "qemu/int128.h"
/*----------------------------------------------------------------------------
| Routine to raise any or all of the software IEC/IEEE floating-point
@@ -183,6 +184,7 @@ floatx80 int64_to_floatx80(int64_t, float_status *status);
float128 int32_to_float128(int32_t, float_status *status);
float128 int64_to_float128(int64_t, float_status *status);
float128 uint64_to_float128(uint64_t, float_status *status);
+float128 uint128_to_float128(Int128, float_status *status);
/*----------------------------------------------------------------------------
| Software half-precision conversion routines.
--
2.35.1
- [PULL 02/23] ppc/spapr/ddw: Add 2M pagesize, (continued)
- [PULL 02/23] ppc/spapr/ddw: Add 2M pagesize, Daniel Henrique Barboza, 2022/04/20
- [PULL 03/23] ppc/pnv: Fix PSI IRQ definition, Daniel Henrique Barboza, 2022/04/20
- [PULL 04/23] ppc/pnv: Remove PnvLpcController::psi link, Daniel Henrique Barboza, 2022/04/20
- [PULL 05/23] ppc/pnv: Remove PnvOCC::psi link, Daniel Henrique Barboza, 2022/04/20
- [PULL 06/23] ppc/pnv: Remove PnvPsiClas::irq_set, Daniel Henrique Barboza, 2022/04/20
- [PULL 07/23] ppc/pnv: Remove useless checks in set_irq handlers, Daniel Henrique Barboza, 2022/04/20
- [PULL 08/23] spapr: Move hypercall_register_softmmu, Daniel Henrique Barboza, 2022/04/20
- [PULL 09/23] spapr: Move nested KVM hypercalls under a TCG only config., Daniel Henrique Barboza, 2022/04/20
- [PULL 10/23] target/ppc: Improve KVM hypercall trace, Daniel Henrique Barboza, 2022/04/20
- [PULL 11/23] qemu/int128: add int128_urshift, Daniel Henrique Barboza, 2022/04/20
- [PULL 12/23] softfloat: add uint128_to_float128,
Daniel Henrique Barboza <=
- [PULL 13/23] softfloat: add int128_to_float128, Daniel Henrique Barboza, 2022/04/20
- [PULL 14/23] softfloat: add float128_to_uint128, Daniel Henrique Barboza, 2022/04/20
- [PULL 15/23] softfloat: add float128_to_int128, Daniel Henrique Barboza, 2022/04/20
- [PULL 16/23] target/ppc: implement xscv[su]qqp, Daniel Henrique Barboza, 2022/04/20
- [PULL 17/23] target/ppc: implement xscvqp[su]qz, Daniel Henrique Barboza, 2022/04/20
- [PULL 18/23] hw/ppc/ppc405_boards: Initialize g_autofree pointer, Daniel Henrique Barboza, 2022/04/20
- [PULL 19/23] ppc/vof: Fix uninitialized string tracing, Daniel Henrique Barboza, 2022/04/20
- [PULL 20/23] pcie: Don't try triggering a LSI when not defined, Daniel Henrique Barboza, 2022/04/20
- [PULL 21/23] ppc/pnv: Remove LSI on the PCIE host bridge, Daniel Henrique Barboza, 2022/04/20
- [PULL 22/23] target/ppc: Add two missing register callbacks on POWER10, Daniel Henrique Barboza, 2022/04/20