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

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Closes #24263.
This commit is contained in:
Alex Rønne Petersen
2025-07-04 13:19:32 +02:00
parent 9ef4bdf234
commit 9a8f1f675b
1 changed files with 2 additions and 2 deletions
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4
lib/std/start.zig
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@@ -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");