i386.md (*fpatanxf3_i387, [...]): New insn patterns.

i386.md (*fpatanxf3_i387, [...]): New insn patterns.

	* config/i386/i386.md (*fpatanxf3_i387, fpatan_extend<mode>xf3_i387):
	New insn patterns.
	(atan2sf3_1, atan2df3_1, atan2xf3_1): Remove insn patterns.
	(atan2xf3): Directly generate RTL pattern.
	(atan2<mode>3): Rename from atan2sf3 and atan2df3 and macroize insn
	patterns using X87MODEF12 mode macro.  Use fpatan_extend<mode>xf3_i387
	and truncate result to requested mode.  Use SSE_FLOAT_MODE_P to
	disable patterns for SSE math.
	(atan<mode>2): Rename from atansf2 and atandf2 and macroize insn
	patterns using X87MODEF12 mode macro.  Use fpatan_extend<mode>xf3_i387
	and truncate result to requested mode.  Use SSE_FLOAT_MODE_P to
	disable patterns for SSE math.

From-SVN: r120950