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| author | danh-arm <dan.handley@arm.com> | 2014-07-28 14:28:40 +0100 |
|---|---|---|
| committer | danh-arm <dan.handley@arm.com> | 2014-07-28 14:28:40 +0100 |
| commit | 6397bf6a99d785caa9b50016cd6c8eb76083c117 (patch) | |
| tree | 5e9ffd003cb8046b7eba285907bdedf4bd8c20ba /include/common/asm_macros.S | |
| parent | 9fd412770f1a7d9c68731a21f157a326db3c5725 (diff) | |
| parent | 8c106902368c40e14c558a0ab91cc57defdc7e81 (diff) | |
Merge pull request #172 from soby-mathew/sm/asm_assert
Introduce asm assert and optimize crash reporting
Diffstat (limited to 'include/common/asm_macros.S')
| -rw-r--r-- | include/common/asm_macros.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/common/asm_macros.S b/include/common/asm_macros.S index 2bccf581..238fa82a 100644 --- a/include/common/asm_macros.S +++ b/include/common/asm_macros.S @@ -162,3 +162,36 @@ wait_for_entrypoint: .macro get_up_stack _name, _size ldr x0, =(\_name + \_size) .endm + + /* + * Helper macro to generate the best mov/movk combinations according + * the value to be moved. The 16 bits from '_shift' are tested and + * if not zero, they are moved into '_reg' without affecting + * other bits. + */ + .macro _mov_imm16 _reg, _val, _shift + .if (\_val >> \_shift) & 0xffff + .if (\_val & (1 << \_shift - 1)) + movk \_reg, (\_val >> \_shift) & 0xffff, LSL \_shift + .else + mov \_reg, \_val & (0xffff << \_shift) + .endif + .endif + .endm + + /* + * Helper macro to load arbitrary values into 32 or 64-bit registers + * which generates the best mov/movk combinations. Many base addresses + * are 64KB aligned the macro will eliminate updating bits 15:0 in + * that case + */ + .macro mov_imm _reg, _val + .if (\_val) == 0 + mov \_reg, #0 + .else + _mov_imm16 \_reg, (\_val), 0 + _mov_imm16 \_reg, (\_val), 16 + _mov_imm16 \_reg, (\_val), 32 + _mov_imm16 \_reg, (\_val), 48 + .endif + .endm |