diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cpu/x86/fpu_enable.inc | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/src/cpu/x86/fpu_enable.inc b/src/cpu/x86/fpu_enable.inc deleted file mode 100644 index 28d2063b21..0000000000 --- a/src/cpu/x86/fpu_enable.inc +++ /dev/null @@ -1,22 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ - -__fpu_start: - /* Preserve BIST. */ - movl %eax, %ebp - - /* - * Clear the CR0[2] bit (the "Emulation" flag, EM). - * - * This indicates that the processor has an (internal or external) - * x87 FPU, i.e. floating point operations will be executed by the - * hardware (and not emulated in software). - * - * Additionally, if this bit is not cleared, MMX/SSE instructions won't - * work, i.e., they will trigger an invalid opcode exception (#UD). - */ - movl %cr0, %eax - andl $~(1 << 2), %eax - movl %eax, %cr0 - - /* Restore BIST. */ - movl %ebp, %eax |