From: Erik van der Kouwe <erik@minix3.org>
Date: Thu, 27 May 2010 09:20:50 +0000 (+0000)
Subject: Oops, committed too much
X-Git-Tag: v3.1.7~27
X-Git-Url: http://zhaoyanbai.com/repos/%22/xml/v3/zones/static/man.host.html?a=commitdiff_plain;h=a31e9b0400802219a43a286cae8344013a8f1a2d;p=minix.git

Oops, committed too much
---

diff --git a/lib/csu/i386/crtso.S b/lib/csu/i386/crtso.S
index 599d49966..4bc54928c 100644
--- a/lib/csu/i386/crtso.S
+++ b/lib/csu/i386/crtso.S
@@ -23,7 +23,7 @@ begdata:
 .bss
 begbss:
 
-.globl	crtso, __penviron, __penvp
+.globl	crtso, __penviron, __penvp, __fpu_present
 .globl __minix_datastart, __minix_mainjump, __minix_unmapzero
 .extern	_main, _exit
 
@@ -61,6 +61,11 @@ crtso:
 	push	%edx	/* push argv */
 	push	%eax	/* push argc */
 
+/* Test the EM bit of the MSW to determine if an FPU is present and */
+/* set __fpu_present if one is found. */
+	smsw	%ax
+	testb	$0x4, %al	/* EM bit in MSW */
+	sete	__fpu_present	/* True if not set */
 	jmp	__minix_mainjump
 
 .balign I386_PAGE_SIZE
@@ -111,5 +116,6 @@ __penviron:
 
 .bss
 .lcomm	__penvp, 4	/* Hidden environment vector */
+.lcomm	__fpu_present, 4	/* FPU present flag */
 
 .extern	endtext	/* Force loading of end labels. */