From ec0d775524e0b8b8f0bc41baa3e6d4e11c50557d Mon Sep 17 00:00:00 2001
From: Shawn Anastasio <shawn@anastas.io>
Date: Wed, 3 Jun 2020 19:37:14 -0500
Subject: Implement std.os for powerpc64{,le}

---
 lib/std/os/linux/tls.zig | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'lib/std/os/linux/tls.zig')

diff --git a/lib/std/os/linux/tls.zig b/lib/std/os/linux/tls.zig
index 8cba45d4b3..9c79bc3a96 100644
--- a/lib/std/os/linux/tls.zig
+++ b/lib/std/os/linux/tls.zig
@@ -48,7 +48,7 @@ const TLSVariant = enum {
 };
 
 const tls_variant = switch (builtin.arch) {
-    .arm, .armeb, .aarch64, .aarch64_be, .riscv32, .riscv64, .mips, .mipsel => TLSVariant.VariantI,
+    .arm, .armeb, .aarch64, .aarch64_be, .riscv32, .riscv64, .mips, .mipsel, .powerpc, .powerpc64, .powerpc64le => TLSVariant.VariantI,
     .x86_64, .i386 => TLSVariant.VariantII,
     else => @compileError("undefined tls_variant for this architecture"),
 };
@@ -72,12 +72,12 @@ const tls_tp_points_past_tcb = switch (builtin.arch) {
 // make the generated code more efficient
 
 const tls_tp_offset = switch (builtin.arch) {
-    .mips, .mipsel => 0x7000,
+    .mips, .mipsel, .powerpc, .powerpc64, .powerpc64le => 0x7000,
     else => 0,
 };
 
 const tls_dtv_offset = switch (builtin.arch) {
-    .mips, .mipsel => 0x8000,
+    .mips, .mipsel, .powerpc, .powerpc64, .powerpc64le => 0x8000,
     .riscv32, .riscv64 => 0x800,
     else => 0,
 };
@@ -160,6 +160,13 @@ pub fn setThreadPointer(addr: usize) void {
             const rc = std.os.linux.syscall1(.set_thread_area, addr);
             assert(rc == 0);
         },
+        .powerpc, .powerpc64, .powerpc64le => {
+            asm volatile (
+                \\ mr 13, %[addr]
+                :
+                : [addr] "r" (addr)
+            );
+        },
         else => @compileError("Unsupported architecture"),
     }
 }
-- 
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