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Directives Reference
ARM DUI 0068B Copyright © 2000, 2001 ARM Limited. All rights reserved. 7-35
7.5.2 FRAME POP
Use the
FRAME POP
directive to inform the assembler when the callee reloads registers.
You can only use it within functions with
FUNCTION
and
ENDFUNC
or
PROC
and
ENDP
directives.
You need not do this after the last instruction in a function.
Syntax
There are two alternative syntaxes for
FRAME POP
:
FRAME POP {reglist}
FRAME POP n
where:
reglist
is a list of registers restored to the values they had on entry to the function.
There must be at least one register in the list.
n
is the number of bytes that the stack pointer moves.
Usage
FRAME POP
is equivalent to a
FRAME ADDRESS
and a
FRAME RESTORE
directive. You can use it
when a single instruction loads registers and alters the stack pointer.
You must use
FRAME POP
immediately after the instruction it refers to.
The assembler calculates the new offset for the canonical frame address. It assumes that:
• each ARM register popped occupied 4 bytes on the stack
• each FPA floating-point register popped occupied 12 bytes on the stack
• each VFP single-precision register popped occupied 4 bytes on the stack, plus an
extra 4-byte word for each list.
See FRAME ADDRESS on page 7-34 and FRAME RESTORE on page 7-38.
- Developer Suite 1
- ARM Developer Suite 2
- Contents 3
- • About this book on page vi 5
- • Feedback on page ix 5
- About this book 6
- Feedback 9
- Preface 10
- Introduction 11
- Chapter 1 11
- Chapter 2 13
- 2.1 Introduction 14
- MOV pc,lr 17
- Example 2-1 27
- Example 2-2 29
- Example 2-3 30
- 2.4 Using the C preprocessor 31
- 2.5 Conditional execution 32
- CMP r0, r1 35
- SUBGT r0, r0, r1 35
- SUBLT r1, r1, r0 35
- BNE gcd 35
- Example 2-5 40
- pseudo-instructions 41
- , where the 42
- Example 2-6 43
- Example 2-9 47
- Example 2-10 String copy 49
- -checkreglist 51
- STMFD (STMDB) LDMFD (LDMIA) 54
- STMFA (STMIB) LDMFA (LDMDA) 54
- STMED (STMDA) LDMED (LDMIB) 54
- STMEA (STMIA) LDMEA (LDMDB) 54
- ; code 55
- Example 2-11 Block copy 56
- Example 2-12 57
- Example 2-13 59
- 2.9 Using macros 60
- Example 2-14 61
- Example 2-15 62
- Example 2-16 64
- Example 2-17 65
- Example 2-18 66
- Example 2-19 67
- Example 2-20 68
- Example 2-21 69
- Example 2-22 72
- Example 2-23 72
- Example 2-24 73
- Example 2-25 74
- Example 2-26 75
- Example 2-27 76
- 2.11 Using frame directives 78
- Chapter 3 79
- 3.1 Command syntax 80
- -via file 85
- 3.2 Format of source lines 86
- 3.4 Built-in variables 88
- 3.5 Symbols 90
- Assembler Reference 100
- 3.6.10 Unary operators 104
- Table 3-10 Boolean operators 109
- Operator Usage Explanation 109
- Logical AND of A and B 109
- Logical OR of A and B 109
- Chapter 4 111
- ARM Instruction Reference 111
- 4.1 Conditional execution 114
- Figure 4-1 ROR 135
- Figure 4-2 RRX 136
- Architectures 145
- Examples 145
- Incorrect example 145
- 4.4 ARM multiply instructions 149
- Incorrect examples 151
- 4.6 ARM branch instructions 167
- SWI{cond} immed_24 182
- SWI 0x123456 182
- MSR CPSR_f, r5 185
- 4.9 ARM pseudo-instructions 188
- MOV r0, r0 194
- Chapter 5 195
- Thumb Instruction Reference 195
- PUSH {reglist} 205
- POP {reglist} 205
- PUSH {reglist, lr} 205
- POP {reglist, pc} 205
- 5.4 Thumb branch instructions 225
- BL label 228
- BL extract 228
- SWI immed_8 231
- SWI 12 231
- 5.6 Thumb pseudo-instructions 233
- MOV r8,r8 237
- Chapter 6 239
- 6.2 Floating-point registers 243
- 6.4 VFP and condition codes 246
- 6.5 VFP system registers 248
- 6.6 Flush-to-zero mode 251
- 6.7 VFP instructions 253
- FSTS s2, [r5] 262
- FLDS s9, fpconst 262
- FNMSCSLE s6, s0, s26 266
- 6.8 VFP pseudo-instruction 276
- Chapter 7 283
- Directives Reference 283
- Example 7-1 287
- Example 7-2 287
- WHILE...WEND 308
- IF...ELSE...ENDIF 308
- 7.6 Reporting directives 326
- 7.7 Miscellaneous directives 331
- Glossary 351
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