zig

commit 9a8f1f675b5c1dd8cd58ebfb828d54fb29385b32 (tree)
parent 9ef4bdf234ed6b58d46452f2286469925f062c39
Author: Alex Rønne Petersen <alex@alexrp.com>
Date:   Fri,  4 Jul 2025 13:19:32 +0200

start: Only issue fninit for x86(_64)-windows

Closes #24263.

Diffstat:
M
lib/std/start.zig
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/std/start.zig b/lib/std/start.zig
@@ -486,7 +486,7 @@ fn _start() callconv(.naked) noreturn {
 
 fn WinStartup() callconv(.withStackAlign(.c, 1)) noreturn {
     // Switch from the x87 fpu state set by windows to the state expected by the gnu abi.
-    if (builtin.abi == .gnu) asm volatile ("fninit");
+    if (builtin.cpu.arch.isX86() and builtin.abi == .gnu) asm volatile ("fninit");
 
     if (!builtin.single_threaded and !builtin.link_libc) {
         _ = @import("os/windows/tls.zig");
@@ -499,7 +499,7 @@ fn WinStartup() callconv(.withStackAlign(.c, 1)) noreturn {
 
 fn wWinMainCRTStartup() callconv(.withStackAlign(.c, 1)) noreturn {
     // Switch from the x87 fpu state set by windows to the state expected by the gnu abi.
-    if (builtin.abi == .gnu) asm volatile ("fninit");
+    if (builtin.cpu.arch.isX86() and builtin.abi == .gnu) asm volatile ("fninit");
 
     if (!builtin.single_threaded and !builtin.link_libc) {
         _ = @import("os/windows/tls.zig");