From e5bb165bed7be4176914672d25ff8e286b6fba49 Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <nsz@port70.net>
Date: Mon, 24 Feb 2014 23:16:29 +0100
Subject: mips: add mips-sf subarch support (soft-float)

Userspace emulated floating-point (gcc -msoft-float) is not compatible
with the default mips abi (assumes an FPU or in kernel emulation of it).
Soft vs hard float abi should not be mixed, __mips_soft_float is checked
in musl's configure script and there is no runtime check. The -sf subarch
does not save/restore floating-point registers in setjmp/longjmp and only
provides dummy fenv implementation.
---
 src/fenv/mips-sf/fenv.sub      |  1 +
 src/setjmp/mips-sf/longjmp.s   | 25 +++++++++++++++++++++++++
 src/setjmp/mips-sf/longjmp.sub |  1 +
 src/setjmp/mips-sf/setjmp.s    | 25 +++++++++++++++++++++++++
 src/setjmp/mips-sf/setjmp.sub  |  1 +
 5 files changed, 53 insertions(+)
 create mode 100644 src/fenv/mips-sf/fenv.sub
 create mode 100644 src/setjmp/mips-sf/longjmp.s
 create mode 100644 src/setjmp/mips-sf/longjmp.sub
 create mode 100644 src/setjmp/mips-sf/setjmp.s
 create mode 100644 src/setjmp/mips-sf/setjmp.sub

(limited to 'src')

diff --git a/src/fenv/mips-sf/fenv.sub b/src/fenv/mips-sf/fenv.sub
new file mode 100644
index 00000000..9cafca5e
--- /dev/null
+++ b/src/fenv/mips-sf/fenv.sub
@@ -0,0 +1 @@
+../fenv.c
diff --git a/src/setjmp/mips-sf/longjmp.s b/src/setjmp/mips-sf/longjmp.s
new file mode 100644
index 00000000..8e769675
--- /dev/null
+++ b/src/setjmp/mips-sf/longjmp.s
@@ -0,0 +1,25 @@
+.set noreorder
+
+.global _longjmp
+.global longjmp
+.type   _longjmp,@function
+.type   longjmp,@function
+_longjmp:
+longjmp:
+	move    $2, $5
+	bne     $2, $0, 1f
+	nop
+	addu    $2, $2, 1
+1:	lw      $ra,  0($4)
+	lw      $sp,  4($4)
+	lw      $16,  8($4)
+	lw      $17, 12($4)
+	lw      $18, 16($4)
+	lw      $19, 20($4)
+	lw      $20, 24($4)
+	lw      $21, 28($4)
+	lw      $22, 32($4)
+	lw      $23, 36($4)
+	lw      $30, 40($4)
+	jr      $ra
+	lw      $28, 44($4)
diff --git a/src/setjmp/mips-sf/longjmp.sub b/src/setjmp/mips-sf/longjmp.sub
new file mode 100644
index 00000000..e80331b6
--- /dev/null
+++ b/src/setjmp/mips-sf/longjmp.sub
@@ -0,0 +1 @@
+longjmp.s
diff --git a/src/setjmp/mips-sf/setjmp.s b/src/setjmp/mips-sf/setjmp.s
new file mode 100644
index 00000000..38ed5e00
--- /dev/null
+++ b/src/setjmp/mips-sf/setjmp.s
@@ -0,0 +1,25 @@
+.set noreorder
+
+.global __setjmp
+.global _setjmp
+.global setjmp
+.type   __setjmp,@function
+.type   _setjmp,@function
+.type   setjmp,@function
+__setjmp:
+_setjmp:
+setjmp:
+	sw      $ra,  0($4)
+	sw      $sp,  4($4)
+	sw      $16,  8($4)
+	sw      $17, 12($4)
+	sw      $18, 16($4)
+	sw      $19, 20($4)
+	sw      $20, 24($4)
+	sw      $21, 28($4)
+	sw      $22, 32($4)
+	sw      $23, 36($4)
+	sw      $30, 40($4)
+	sw      $28, 44($4)
+	jr      $ra
+	li      $2, 0
diff --git a/src/setjmp/mips-sf/setjmp.sub b/src/setjmp/mips-sf/setjmp.sub
new file mode 100644
index 00000000..b7ad2210
--- /dev/null
+++ b/src/setjmp/mips-sf/setjmp.sub
@@ -0,0 +1 @@
+setjmp.s
-- 
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