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diff --git a/testfloat/386-Win32-gcc/systmodes.S b/testfloat/386-Win32-gcc/systmodes.S
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+
+/*
+===============================================================================
+
+This GNU assembler source file is part of TestFloat, Release 2a, a package
+of programs for testing the correctness of floating-point arithmetic
+complying to the IEC/IEEE Standard for Floating-Point.
+
+Written by John R. Hauser.  More information is available through the Web
+page `http://HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/TestFloat.html'.
+
+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort
+has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
+TIMES RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO
+PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
+AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
+
+Derivative works are acceptable, even for commercial purposes, so long as
+(1) they include prominent notice that the work is derivative, and (2) they
+include prominent notice akin to these four paragraphs for those parts of
+this code that are retained.
+
+===============================================================================
+*/
+
+	.text
+
+/*
+-------------------------------------------------------------------------------
+Sets the system's IEC/IEEE floating-point rounding mode.  Also disables all
+system exception traps.
+-------------------------------------------------------------------------------
+*/
+	.align 4
+	.global _syst_float_set_rounding_mode
+_syst_float_set_rounding_mode:
+	movb 4(%esp),%al
+	andb $3,%al
+	shlw $10,%ax
+	orw $63,%ax
+	subl $2,%esp
+	fnstcw 0(%esp)
+	andw $768,0(%esp)
+	orw %ax,0(%esp)
+	fldcw 0(%esp)
+	addl $2,%esp
+	ret
+
+/*
+-------------------------------------------------------------------------------
+Sets the rounding precision of subsequent extended double-precision
+operations.  The `precision' argument should be one of 0, 32, 64, or 80.
+If `precision' is 32, the rounding precision is set equivalent to single
+precision; else if `precision' is 64, the rounding precision is set
+equivalent to double precision; else the rounding precision is set to full
+extended double precision.
+-------------------------------------------------------------------------------
+*/
+	.align 4
+	.global _syst_float_set_rounding_precision
+_syst_float_set_rounding_precision:
+	movb 4(%esp),%al
+	movb $0,%ah
+	cmpb $32,%al
+	je setRoundingPrecision
+	movb $2,%ah
+	cmpb $64,%al
+	je setRoundingPrecision
+	movb $3,%ah
+	cmpb $80,%al
+	je setRoundingPrecision
+	movb $0,%ah
+setRoundingPrecision:
+	movb $0,%al
+	subl $2,%esp
+	fnstcw 0(%esp)
+	andw $64767,0(%esp)
+	orw %ax,0(%esp)
+	fldcw 0(%esp)
+	addl $2,%esp
+	ret
+