[arm] Split out 32-bit-specific code to arch/arm32

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/src/arch/arm32/libgcc/lldivmod.S b/src/arch/arm32/libgcc/lldivmod.S
new file mode 100644
index 000000000..910be4b78
--- /dev/null
+++ b/src/arch/arm32/libgcc/lldivmod.S
@@ -0,0 +1,50 @@
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
+
+	.text
+	.thumb
+
+/**
+ * Unsigned long long division
+ *
+ * @v r1:r0		Dividend
+ * @v r3:r2		Divisor
+ * @ret r1:r0		Quotient
+ * @ret r3:r2		Remainder
+ */
+	.section ".text.__aeabi_uldivmod", "ax", %progbits
+	.globl	__aeabi_uldivmod
+	.type	__aeabi_uldivmod, %function
+__aeabi_uldivmod:
+	/* Allocate stack space for remainder and pointer to remainder */
+	push	{r0, r1, r2, r3, r4, lr}
+	/* Call __udivmoddi4() */
+	add	r4, sp, #8
+	str	r4, [sp]
+	bl	__udivmoddi4
+	/* Retrieve remainder and return */
+	add	sp, sp, #8
+	pop	{r2, r3, r4, pc}
+	.size	__aeabi_uldivmod, . - __aeabi_uldivmod
+
+/**
+ * Signed long long division
+ *
+ * @v r1:r0		Dividend
+ * @v r3:r2		Divisor
+ * @ret r1:r0		Quotient
+ * @ret r3:r2		Remainder
+ */
+	.section ".text.__aeabi_ldivmod", "ax", %progbits
+	.globl	__aeabi_ldivmod
+	.type	__aeabi_ldivmod, %function
+__aeabi_ldivmod:
+	/* Allocate stack space for remainder and pointer to remainder */
+	push	{r0, r1, r2, r3, r4, lr}
+	/* Call __divmoddi4() */
+	add	r4, sp, #8
+	str	r4, [sp]
+	bl	__divmoddi4
+	/* Retrieve remainder and return */
+	add	sp, sp, #8
+	pop	{r2, r3, r4, pc}
+	.size	__aeabi_ldivmod, . - __aeabi_ldivmod