1From 9b0737858b2b68c3a4d1e0611f2732679c997c6d Mon Sep 17 00:00:00 2001
2From: Richard Henderson <richard.henderson@linaro.org>
3Date: Fri, 17 Dec 2021 17:57:14 +0100
4Subject: [PATCH 02/21] softfloat: Add flag specific to Inf - Inf
5MIME-Version: 1.0
6Content-Type: text/plain; charset=UTF-8
7Content-Transfer-Encoding: 8bit
8
9PowerPC has this flag, and it's easier to compute it here
10than after the fact.
11
12Upstream-Status: Backport
13[https://git.qemu.org/?p=qemu.git;a=commit;h=ba11446c40903b9d97fb75a078d43fee6444d3b6]
14
15Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
16Message-Id: <20211119160502.17432-3-richard.henderson@linaro.org>
17Signed-off-by: Cédric Le Goater <clg@kaod.org>
18Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
19---
20 fpu/softfloat-parts.c.inc     | 3 ++-
21 include/fpu/softfloat-types.h | 1 +
22 2 files changed, 3 insertions(+), 1 deletion(-)
23
24diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc
25index 41d4b17e41..eb2b475ca4 100644
26--- a/fpu/softfloat-parts.c.inc
27+++ b/fpu/softfloat-parts.c.inc
28@@ -354,7 +354,7 @@ static FloatPartsN *partsN(addsub)(FloatPartsN *a, FloatPartsN *b,
29                 return a;
30             }
31             /* Inf - Inf */
32-            float_raise(float_flag_invalid, s);
33+            float_raise(float_flag_invalid | float_flag_invalid_isi, s);
34             parts_default_nan(a, s);
35             return a;
36         }
37@@ -494,6 +494,7 @@ static FloatPartsN *partsN(muladd)(FloatPartsN *a, FloatPartsN *b,
38
39         if (ab_mask & float_cmask_inf) {
40             if (c->cls == float_class_inf && a->sign != c->sign) {
41+                float_raise(float_flag_invalid | float_flag_invalid_isi, s);
42                 goto d_nan;
43             }
44             goto return_inf;
45diff --git a/include/fpu/softfloat-types.h b/include/fpu/softfloat-types.h
46index 65a43aff59..eaa12e1e00 100644
47--- a/include/fpu/softfloat-types.h
48+++ b/include/fpu/softfloat-types.h
49@@ -152,6 +152,7 @@ enum {
50     float_flag_inexact         = 0x0010,
51     float_flag_input_denormal  = 0x0020,
52     float_flag_output_denormal = 0x0040,
53+    float_flag_invalid_isi     = 0x0080,  /* inf - inf */
54 };
55
56 /*
57--
582.17.1
59
60