From dc046f55bbff5f79d022882723c73a6b9af0bf86 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sun, 22 Jul 2012 18:55:01 -0400
Subject: [PATCH] add floating point register saving/restoring to mips
 setjmp/longjmp

also fix the alignment of jmp_buf to meet the abi. linux always
emulates fpu on mips if it's not present, so enabling this code
unconditionally is "safe" but may be slow. in the long term it may be
preferable to find a way to disable it on soft float builds.
---
 arch/mips/bits/setjmp.h   |  2 +-
 src/setjmp/mips/longjmp.s | 16 +++++++++++++++-
 src/setjmp/mips/setjmp.s  | 14 ++++++++++++++
 3 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/arch/mips/bits/setjmp.h b/arch/mips/bits/setjmp.h
index c43ea2be..6bb15464 100644
--- a/arch/mips/bits/setjmp.h
+++ b/arch/mips/bits/setjmp.h
@@ -1 +1 @@
-typedef unsigned long jmp_buf [30];
+typedef unsigned long long jmp_buf [15];
diff --git a/src/setjmp/mips/longjmp.s b/src/setjmp/mips/longjmp.s
index 9cf6f8d0..fc8e7260 100644
--- a/src/setjmp/mips/longjmp.s
+++ b/src/setjmp/mips/longjmp.s
@@ -10,7 +10,21 @@ longjmp:
 	bne     $2, $0, 1f
 	nop
 	addu    $2, $2, 1
-1:      lw      $ra,  0($4)
+1:	lw      $8,  48($4)
+	ctc1    $8,  $31
+	lwc1    $20, 56($4)
+	lwc1    $21, 60($4)
+	lwc1    $22, 64($4)
+	lwc1    $23, 68($4)
+	lwc1    $24, 72($4)
+	lwc1    $25, 76($4)
+	lwc1    $26, 80($4)
+	lwc1    $27, 84($4)
+	lwc1    $28, 88($4)
+	lwc1    $29, 92($4)
+	lwc1    $30, 96($4)
+	lwc1    $31, 100($4)
+	lw      $ra,  0($4)
 	lw      $sp,  4($4)
 	lw      $16,  8($4)
 	lw      $17, 12($4)
diff --git a/src/setjmp/mips/setjmp.s b/src/setjmp/mips/setjmp.s
index 38ed5e00..1b79525f 100644
--- a/src/setjmp/mips/setjmp.s
+++ b/src/setjmp/mips/setjmp.s
@@ -21,5 +21,19 @@ setjmp:
 	sw      $23, 36($4)
 	sw      $30, 40($4)
 	sw      $28, 44($4)
+	cfc1    $8, $31
+	sw      $8,  48($4)
+	swc1    $20, 56($4)
+	swc1    $21, 60($4)
+	swc1    $22, 64($4)
+	swc1    $23, 68($4)
+	swc1    $24, 72($4)
+	swc1    $25, 76($4)
+	swc1    $26, 80($4)
+	swc1    $27, 84($4)
+	swc1    $28, 88($4)
+	swc1    $29, 92($4)
+	swc1    $30, 96($4)
+	swc1    $31, 100($4)
 	jr      $ra
 	li      $2, 0
-- 
2.25.1