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| author | Johannes Stoelp <johannes.stoelp@gmail.com> | 2021-11-27 23:43:51 +0100 |
|---|---|---|
| committer | Johannes Stoelp <johannes.stoelp@gmail.com> | 2021-11-27 23:43:51 +0100 |
| commit | a21db4db6af4987ad4ec81e1fb6d6ee4f9fc2695 (patch) | |
| tree | b9a48cdaae30204a3d9ed9a3df8cacd6df6f6a2b | |
| parent | cad6375d3e36538ab44a5bdd1fbbf5acd420fc1b (diff) | |
| download | notes-a21db4db6af4987ad4ec81e1fb6d6ee4f9fc2695.tar.gz notes-a21db4db6af4987ad4ec81e1fb6d6ee4f9fc2695.zip | |
armv7: update notes on addressing
| -rw-r--r-- | src/arch/armv7.md | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/arch/armv7.md b/src/arch/armv7.md index f6c3a96..2618938 100644 --- a/src/arch/armv7.md +++ b/src/arch/armv7.md @@ -71,10 +71,13 @@ blx <Rm> // absolute branch to address in register Rm & ### Load/Store Different addressing modes. ```armasm -str r1, [r0] // [r0]=r1 -str r1, [r0, #4] // [r0+4]=r1 -str r1, [r0, #4]! // r0+=4; [r0]=r1 -str r1, [r0], 4 // [r0]=r1; r0+=4 +ldr r1, [r0] // r1 = [r0] +ldr r1, [r0, #4] // r1 = [r0+4] + +ldr r1, [r0, #4]! // pre-inc : r0+=4; r1 = [r0] +ldr r1, [r0], #4 // post-inc: [r0] = r1; r0+=4 + +ldr r0, [r1, r2, lsl #3] // r0 = [r1 + (r2<<3)] ``` Load/store multiple registers full-descending. |