path: root/arch/sh/boot
diff options
authorStuart Menefy <stuart.menefy@st.com>2009-08-24 17:09:53 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-08-24 17:09:53 +0900
commitfea966f7564205fcf5919af9bde031e753419c96 (patch)
treeeb04727dfaad0c42bf9ba771e38f07c310622120 /arch/sh/boot
parentd724a9c9d572e092d1ce820463f082697487b874 (diff)
sh: Remove implicit sign extension from assembler immediates
The SH instruction set has several instructions which accept an 8 bit immediate operand. For logical instructions this operand is zero extended, for arithmetic instructions the operand is sign extended. After adding an option to the assembler to check this, it was found that several pieces of assembly code were assuming this behaviour, and in one case getting it wrong. So this patch explicitly sign extends any immediate operands, which makes it obvious what is happening, and fixes the one case which got it wrong. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/boot')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/boot/compressed/head_32.S b/arch/sh/boot/compressed/head_32.S
index 06ac31f3be8..02a30935f0b 100644
--- a/arch/sh/boot/compressed/head_32.S
+++ b/arch/sh/boot/compressed/head_32.S
@@ -22,7 +22,7 @@ startup:
bt clear_bss
sub r0, r2
mov.l bss_start_addr, r0
- mov #0xe0, r1
+ mov #0xffffffe0, r1
and r1, r0 ! align cache line
mov.l text_start_addr, r3
mov r0, r1