From f1ad0a3e376b1103b48689fc48ed9443641a038f Mon Sep 17 00:00:00 2001
From: Michael Pavone <pavone@retrodev.com>
Date: Wed, 7 Jan 2015 22:42:35 -0800
Subject: Added ldr and str instructions to gen_arm

---
 gen_arm.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'gen_arm.c')

diff --git a/gen_arm.c b/gen_arm.c
index 5d9fab6..1534ee2 100644
--- a/gen_arm.c
+++ b/gen_arm.c
@@ -548,3 +548,39 @@ uint32_t popm_cc(code_info *code, uint32_t reglist, uint32_t cc)
 	*(code->cur++) = cc | POPM | reglist;
 	return CODE_OK;
 }
+
+uint32_t load_store_immoff(code_info *code, uint32_t op, uint32_t dst, uint32_t base, int32_t offset, uint32_t cc)
+{
+	if (offset >= 0x1000 || offset <= -0x1000) {
+		return INVALID_IMMED;
+	}
+	check_alloc_code(code);
+	uint32_t instruction = cc | op | POST_IND | OFF_IMM | SZ_W | base << 16 | dst << 12;
+	if (offset >= 0) {
+		instruction |= offset | DIR_UP;
+	} else {
+		instruction |= (-offset) | DIR_DOWN;
+	}
+	*(code->cur++) = instruction;
+	return CODE_OK;
+}
+
+uint32_t ldr_cc(code_info *code, uint32_t dst, uint32_t base, int32_t offset, uint32_t cc)
+{
+	return load_store_immoff(code, OP_LDR, dst, base, offset, cc);
+}
+
+uint32_t ldr(code_info *code, uint32_t dst, uint32_t base, int32_t offset)
+{
+	return ldr_cc(code, dst, base, offset, CC_AL);
+}
+
+uint32_t str_cc(code_info *code, uint32_t src, uint32_t base, int32_t offset, uint32_t cc)
+{
+	return load_store_immoff(code, OP_STR, src, base, offset, cc);
+}
+
+uint32_t str(code_info *code, uint32_t src, uint32_t base, int32_t offset)
+{
+	return str_cc(code, src, base, offset, CC_AL);
+}
-- 
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