From 9f7fd3a3c6aeb62d329dfd3d80096ffd895125b6 Mon Sep 17 00:00:00 2001
From: Packit <packit>
Date: Aug 21 2020 09:21:05 +0000
Subject: Apply patch glibc-rh1783303-7.patch


patch_name: glibc-rh1783303-7.patch
location_in_specfile: 322
present_in_specfile: true

---

diff --git a/sysdeps/powerpc/fpu/fedisblxcpt.c b/sysdeps/powerpc/fpu/fedisblxcpt.c
index 90bc3d1..2a776c7 100644
--- a/sysdeps/powerpc/fpu/fedisblxcpt.c
+++ b/sysdeps/powerpc/fpu/fedisblxcpt.c
@@ -26,23 +26,25 @@ fedisableexcept (int excepts)
   int result, new;
 
   /* Get current exception mask to return.  */
-  fe.fenv = curr.fenv = fegetenv_register ();
+  fe.fenv = curr.fenv = fegetenv_status ();
   result = fenv_reg_to_exceptions (fe.l);
 
   if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
     excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
 
+  new = fenv_exceptions_to_reg (excepts);
+
+  if (fenv_reg_to_exceptions (new) != excepts)
+    return -1;
+
   /* Sets the new exception mask.  */
-  fe.l &= ~ fenv_exceptions_to_reg (excepts);
+  fe.l &= ~new;
 
   if (fe.l != curr.l)
-    fesetenv_register (fe.fenv);
+    fesetenv_mode (fe.fenv);
 
-  new = __fegetexcept ();
   if (new == 0 && result != 0)
     (void)__fe_mask_env ();
 
-  if ((new & excepts) != 0)
-    result = -1;
   return result;
 }
diff --git a/sysdeps/powerpc/fpu/feenablxcpt.c b/sysdeps/powerpc/fpu/feenablxcpt.c
index e029971..6f5a828 100644
--- a/sysdeps/powerpc/fpu/feenablxcpt.c
+++ b/sysdeps/powerpc/fpu/feenablxcpt.c
@@ -26,24 +26,25 @@ feenableexcept (int excepts)
   int result, new;
 
   /* Get current exception mask to return.  */
-  fe.fenv = curr.fenv = fegetenv_register ();
+  fe.fenv = curr.fenv = fegetenv_status ();
   result = fenv_reg_to_exceptions (fe.l);
 
   if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
     excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
 
+  new = fenv_exceptions_to_reg (excepts);
+
+  if (fenv_reg_to_exceptions (new) != excepts)
+    return -1;
+
   /* Sets the new exception mask.  */
-  fe.l |= fenv_exceptions_to_reg (excepts);
+  fe.l |= new;
 
   if (fe.l != curr.l)
-    fesetenv_register (fe.fenv);
+    fesetenv_mode (fe.fenv);
 
-  new = __fegetexcept ();
   if (new != 0 && result == 0)
     (void) __fe_nomask_env_priv ();
 
-  if ((new & excepts) != excepts)
-    result = -1;
-
   return result;
 }
diff --git a/sysdeps/powerpc/fpu/fenv_libc.h b/sysdeps/powerpc/fpu/fenv_libc.h
index f9634a6..b244770 100644
--- a/sysdeps/powerpc/fpu/fenv_libc.h
+++ b/sysdeps/powerpc/fpu/fenv_libc.h
@@ -71,6 +71,11 @@ extern const fenv_t *__fe_mask_env (void) attribute_hidden;
 	    asm volatile ("mtfsf 0xff,%0" : : "f" (d)); \
 	} while(0)
 
+/* Set the last 2 nibbles of the FPSCR, which contain the
+   exception enables and the rounding mode.
+   'fegetenv_status' retrieves these bits by reading the FPSCR.  */
+#define fesetenv_mode(env) __builtin_mtfsf (0b00000011, (env));
+
 /* This very handy macro:
    - Sets the rounding mode to 'round to nearest';
    - Sets the processor into IEEE mode; and
@@ -209,8 +214,11 @@ enum {
   (FPSCR_VE_MASK|FPSCR_OE_MASK|FPSCR_UE_MASK|FPSCR_ZE_MASK|FPSCR_XE_MASK)
 #define FPSCR_BASIC_EXCEPTIONS_MASK \
   (FPSCR_VX_MASK|FPSCR_OX_MASK|FPSCR_UX_MASK|FPSCR_ZX_MASK|FPSCR_XX_MASK)
-
+#define FPSCR_FPRF_MASK \
+  (FPSCR_FPRF_C_MASK|FPSCR_FPRF_FL_MASK|FPSCR_FPRF_FG_MASK| \
+   FPSCR_FPRF_FE_MASK|FPSCR_FPRF_FU_MASK)
 #define FPSCR_CONTROL_MASK (FPSCR_ENABLES_MASK|FPSCR_NI_MASK|FPSCR_RN_MASK)
+#define FPSCR_STATUS_MASK (FPSCR_FR_MASK|FPSCR_FI_MASK|FPSCR_FPRF_MASK)
 
 /* The bits in the FENV(1) ABI for exceptions correspond one-to-one with bits
    in the FPSCR, albeit shifted to different but corresponding locations.
diff --git a/sysdeps/powerpc/fpu/fesetmode.c b/sysdeps/powerpc/fpu/fesetmode.c
index 32203a2..29e088d 100644
--- a/sysdeps/powerpc/fpu/fesetmode.c
+++ b/sysdeps/powerpc/fpu/fesetmode.c
@@ -19,11 +19,6 @@
 #include <fenv_libc.h>
 #include <fpu_control.h>
 
-#define _FPU_MASK_ALL (_FPU_MASK_ZM | _FPU_MASK_OM | _FPU_MASK_UM	\
-		       | _FPU_MASK_XM | _FPU_MASK_IM)
-
-#define FPU_STATUS 0xbffff700ULL
-
 int
 fesetmode (const femode_t *modep)
 {
@@ -32,18 +27,18 @@ fesetmode (const femode_t *modep)
   /* Logic regarding enabled exceptions as in fesetenv.  */
 
   new.fenv = *modep;
-  old.fenv = fegetenv_register ();
-  new.l = (new.l & ~FPU_STATUS) | (old.l & FPU_STATUS);
+  old.fenv = fegetenv_status ();
+  new.l = (new.l & ~FPSCR_STATUS_MASK) | (old.l & FPSCR_STATUS_MASK);
 
   if (old.l == new.l)
     return 0;
 
-  if ((old.l & _FPU_MASK_ALL) == 0 && (new.l & _FPU_MASK_ALL) != 0)
+  if ((old.l & FPSCR_ENABLES_MASK) == 0 && (new.l & FPSCR_ENABLES_MASK) != 0)
     (void) __fe_nomask_env_priv ();
 
-  if ((old.l & _FPU_MASK_ALL) != 0 && (new.l & _FPU_MASK_ALL) == 0)
+  if ((old.l & FPSCR_ENABLES_MASK) != 0 && (new.l & FPSCR_ENABLES_MASK) == 0)
     (void) __fe_mask_env ();
 
-  fesetenv_register (new.fenv);
+  fesetenv_mode (new.fenv);
   return 0;
 }