From f567ea1e2798fd3156a416e61f083ea3e6b95719 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Wed, 12 Oct 2022 13:26:36 -0500
Subject: add pixman and libpng

---
 libs/pixman-0.40.0/pixman/pixman-ppc.c | 155 +++++++++++++++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 libs/pixman-0.40.0/pixman/pixman-ppc.c

(limited to 'libs/pixman-0.40.0/pixman/pixman-ppc.c')

diff --git a/libs/pixman-0.40.0/pixman/pixman-ppc.c b/libs/pixman-0.40.0/pixman/pixman-ppc.c
new file mode 100644
index 0000000..a6e7bb0
--- /dev/null
+++ b/libs/pixman-0.40.0/pixman/pixman-ppc.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright © 2000 SuSE, Inc.
+ * Copyright © 2007 Red Hat, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of SuSE not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  SuSE makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
+ * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "pixman-private.h"
+
+#ifdef USE_VMX
+
+/* The CPU detection code needs to be in a file not compiled with
+ * "-maltivec -mabi=altivec", as gcc would try to save vector register
+ * across function calls causing SIGILL on cpus without Altivec/vmx.
+ */
+#ifdef __APPLE__
+#include <sys/sysctl.h>
+
+static pixman_bool_t
+pixman_have_vmx (void)
+{
+    int error, have_vmx;
+    size_t length = sizeof(have_vmx);
+
+    error = sysctlbyname ("hw.optional.altivec", &have_vmx, &length, NULL, 0);
+
+    if (error)
+	return FALSE;
+
+    return have_vmx;
+}
+
+#elif defined (__OpenBSD__)
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <machine/cpu.h>
+
+static pixman_bool_t
+pixman_have_vmx (void)
+{
+    int error, have_vmx;
+    int mib[2] = { CTL_MACHDEP, CPU_ALTIVEC };
+    size_t length = sizeof(have_vmx);
+
+    error = sysctl (mib, 2, &have_vmx, &length, NULL, 0);
+
+    if (error != 0)
+	return FALSE;
+
+    return have_vmx;
+}
+
+#elif defined (__linux__)
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <linux/auxvec.h>
+#include <asm/cputable.h>
+
+static pixman_bool_t
+pixman_have_vmx (void)
+{
+    int have_vmx = FALSE;
+    int fd;
+    struct
+    {
+	unsigned long type;
+	unsigned long value;
+    } aux;
+
+    fd = open ("/proc/self/auxv", O_RDONLY);
+    if (fd >= 0)
+    {
+	while (read (fd, &aux, sizeof (aux)) == sizeof (aux))
+	{
+	    if (aux.type == AT_HWCAP && (aux.value & PPC_FEATURE_HAS_ALTIVEC))
+	    {
+		have_vmx = TRUE;
+		break;
+	    }
+	}
+
+	close (fd);
+    }
+
+    return have_vmx;
+}
+
+#else /* !__APPLE__ && !__OpenBSD__ && !__linux__ */
+#include <signal.h>
+#include <setjmp.h>
+
+static jmp_buf jump_env;
+
+static void
+vmx_test (int        sig,
+	  siginfo_t *si,
+	  void *     unused)
+{
+    longjmp (jump_env, 1);
+}
+
+static pixman_bool_t
+pixman_have_vmx (void)
+{
+    struct sigaction sa, osa;
+    int jmp_result;
+
+    sa.sa_flags = SA_SIGINFO;
+    sigemptyset (&sa.sa_mask);
+    sa.sa_sigaction = vmx_test;
+    sigaction (SIGILL, &sa, &osa);
+    jmp_result = setjmp (jump_env);
+    if (jmp_result == 0)
+    {
+	asm volatile ( "vor 0, 0, 0" );
+    }
+    sigaction (SIGILL, &osa, NULL);
+    return (jmp_result == 0);
+}
+
+#endif /* __APPLE__ */
+#endif /* USE_VMX */
+
+pixman_implementation_t *
+_pixman_ppc_get_implementations (pixman_implementation_t *imp)
+{
+#ifdef USE_VMX
+    if (!_pixman_disabled ("vmx") && pixman_have_vmx ())
+	imp = _pixman_implementation_create_vmx (imp);
+#endif
+
+    return imp;
+}
-- 
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