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Commit 111e32b2 authored by LEROY Christophe's avatar LEROY Christophe Committed by Scott Wood
Browse files

powerpc/8xx: Duplicate two insns instead of branching 



Branching takes two cycles on MPC8xx. Lets duplicate the two instructions
and avoid the branching.

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
parent 41cacac6

arch/powerpc/kernel/head_8xx.S

+4 −2
Original line number Diff line number Diff line
@@ -644,9 +644,11 @@ modified_instr: 


	/* special handling for r10,r11 since these are modified already */

153:	mfspr	r11, SPRN_SPRG_SCRATCH1	/* load r11 from SPRN_SPRG_SCRATCH1 */

	b	155f

	add	r10, r10, r11	/* add it */

	mfctr	r11		/* restore r11 */

	b	151b

154:	mfspr	r11, SPRN_SPRG_SCRATCH0	/* load r10 from SPRN_SPRG_SCRATCH0 */

155:	add	r10, r10, r11	/* add it */

	add	r10, r10, r11	/* add it */

	mfctr	r11		/* restore r11 */

	b	151b

#endif