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Diffstat (limited to 'doc/asm.html')
| -rw-r--r-- | doc/asm.html | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/asm.html b/doc/asm.html index dbbe8f2cd1..cc8598aeff 100644 --- a/doc/asm.html +++ b/doc/asm.html @@ -687,6 +687,13 @@ MOVQ g(CX), AX // Move g into AX. MOVQ g_m(AX), BX // Move g.m into BX. </pre> +<p> +Register <code>BP</code> is callee-save. +The assembler automatically inserts <code>BP</code> save/restore when frame size is larger than zero. +Using <code>BP</code> as a general purpose register is allowed, +however it can interfere with sampling-based profiling. +</p> + <h3 id="arm">ARM</h3> <p> |