Module Name: src
Committed By: matt
Date: Mon Aug 24 05:18:03 UTC 2009
Modified Files:
src/sys/arch/mips/mips [matt-nb5-mips64]: mipsX_subr.S
Log Message:
Don't bother saving/restore t0-t3/ta0-ta3 in the trapframe. Instead use
the just saved s0-s7 to hold them. any function we call will preserve
them and we just do moves on the way back.
To generate a diff of this commit:
cvs rdiff -u -r1.26.36.1.2.2 -r1.26.36.1.2.3 \
src/sys/arch/mips/mips/mipsX_subr.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/mips/mips/mipsX_subr.S
diff -u src/sys/arch/mips/mips/mipsX_subr.S:1.26.36.1.2.2 src/sys/arch/mips/mips/mipsX_subr.S:1.26.36.1.2.3
--- src/sys/arch/mips/mips/mipsX_subr.S:1.26.36.1.2.2 Mon Aug 24 04:04:53 2009
+++ src/sys/arch/mips/mips/mipsX_subr.S Mon Aug 24 05:18:03 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: mipsX_subr.S,v 1.26.36.1.2.2 2009/08/24 04:04:53 matt Exp $ */
+/* $NetBSD: mipsX_subr.S,v 1.26.36.1.2.3 2009/08/24 05:18:03 matt Exp $ */
/*
* Copyright 2002 Wasabi Systems, Inc.
@@ -861,15 +861,6 @@
REG_S a3, FRAME_A3(k1)
PTR_L a0, CPUVAR(CURLWP) # 1st arg is curlwp
mfhi v1
- REG_S t0, FRAME_T0(k1) # no need to save temp regs
- REG_S t1, FRAME_T1(k1)
- REG_S t2, FRAME_T2(k1)
- REG_S t3, FRAME_T3(k1)
- mfc0 a1, MIPS_COP_0_STATUS # 2nd arg is STATUS
- REG_S ta0, FRAME_TA0(k1)
- REG_S ta1, FRAME_TA1(k1)
- REG_S ta2, FRAME_TA2(k1)
- REG_S ta3, FRAME_TA3(k1)
mfc0 a2, MIPS_COP_0_CAUSE # 3rd arg is CAUSE
REG_S s0, FRAME_S0(k1)
REG_S s1, FRAME_S1(k1)
@@ -880,6 +871,15 @@
REG_S s5, FRAME_S5(k1)
REG_S s6, FRAME_S6(k1)
REG_S s7, FRAME_S7(k1)
+ move s0, t0 # since the saved registers
+ move s1, t1 # saved been saved we can
+ move s2, t2 # use them to stash most of
+ move s3, t3 # temporary registers
+ mfc0 a1, MIPS_COP_0_STATUS # 2nd arg is STATUS
+ move s4, ta0
+ move s5, ta1
+ move s6, ta2
+ move s7, ta3
#REG_S t8, FRAME_T8(k1)
#REG_S t9, FRAME_T9(k1)
REG_S gp, FRAME_GP(k1)
@@ -978,14 +978,14 @@
REG_L a1, FRAME_A1(k1)
REG_L a2, FRAME_A2(k1)
REG_L a3, FRAME_A3(k1)
- REG_L t0, FRAME_T0(k1)
- REG_L t1, FRAME_T1(k1)
- REG_L t2, FRAME_T2(k1)
- REG_L t3, FRAME_T3(k1)
- REG_L ta0, FRAME_TA0(k1)
- REG_L ta1, FRAME_TA1(k1)
- REG_L ta2, FRAME_TA2(k1)
- REG_L ta3, FRAME_TA3(k1)
+ move t0, s0 # restore the temps
+ move t1, s1
+ move t2, s2
+ move t3, s3
+ move ta0, s4
+ move ta1, s5
+ move ta2, s6
+ move ta3, s7
REG_L s0, FRAME_S0(k1)
REG_L s1, FRAME_S1(k1)
REG_L s2, FRAME_S2(k1)
