From 9b0737858b2b68c3a4d1e0611f2732679c997c6d Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 17 Dec 2021 17:57:14 +0100
Subject: [PATCH 02/21] softfloat: Add flag specific to Inf - Inf
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PowerPC has this flag, and it's easier to compute it here
than after the fact.

Upstream-Status: Backport
[https://git.qemu.org/?p=qemu.git;a=commit;h=ba11446c40903b9d97fb75a078d43fee6444d3b6]

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211119160502.17432-3-richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
---
 fpu/softfloat-parts.c.inc     | 3 ++-
 include/fpu/softfloat-types.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc
index 41d4b17e41..eb2b475ca4 100644
--- a/fpu/softfloat-parts.c.inc
+++ b/fpu/softfloat-parts.c.inc
@@ -354,7 +354,7 @@ static FloatPartsN *partsN(addsub)(FloatPartsN *a, FloatPartsN *b,
                 return a;
             }
             /* Inf - Inf */
-            float_raise(float_flag_invalid, s);
+            float_raise(float_flag_invalid | float_flag_invalid_isi, s);
             parts_default_nan(a, s);
             return a;
         }
@@ -494,6 +494,7 @@ static FloatPartsN *partsN(muladd)(FloatPartsN *a, FloatPartsN *b,
 
         if (ab_mask & float_cmask_inf) {
             if (c->cls == float_class_inf && a->sign != c->sign) {
+                float_raise(float_flag_invalid | float_flag_invalid_isi, s);
                 goto d_nan;
             }
             goto return_inf;
diff --git a/include/fpu/softfloat-types.h b/include/fpu/softfloat-types.h
index 65a43aff59..eaa12e1e00 100644
--- a/include/fpu/softfloat-types.h
+++ b/include/fpu/softfloat-types.h
@@ -152,6 +152,7 @@ enum {
     float_flag_inexact         = 0x0010,
     float_flag_input_denormal  = 0x0020,
     float_flag_output_denormal = 0x0040,
+    float_flag_invalid_isi     = 0x0080,  /* inf - inf */
 };
 
 /*
-- 
2.17.1

