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| author | Kevin O'Connor <kevin@koconnor.net> | 2009-01-19 17:58:54 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2009-01-19 17:58:54 -0500 |
| commit | 79f4118e50ce256994b75b99811ceb0e6a812a13 (patch) | |
| tree | 6f6f84b3c37babec6404cbb2505b7e286d75b86a /src/farptr.h | |
| parent | 35ae726530432c478a0955532e7e6c8b32c4bfef (diff) | |
| download | seabios-hppa-79f4118e50ce256994b75b99811ceb0e6a812a13.zip seabios-hppa-79f4118e50ce256994b75b99811ceb0e6a812a13.tar.gz seabios-hppa-79f4118e50ce256994b75b99811ceb0e6a812a13.tar.bz2 | |
Allow GET/SET_SEG asm to access memory or a register.
This is a minor optimization that can improve gcc code generation.
Diffstat (limited to 'src/farptr.h')
| -rw-r--r-- | src/farptr.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/farptr.h b/src/farptr.h index 3256848..a26cf08 100644 --- a/src/farptr.h +++ b/src/farptr.h @@ -49,10 +49,10 @@ extern u16 __segment_FS, __segment_GS; // Low level macros for getting/setting a segment register. #define __SET_SEG(SEG, value) \ __asm__("movw %w1, %%" #SEG : "=m"(__segment_ ## SEG) \ - : "r"(value)) + : "rm"(value)) #define __GET_SEG(SEG) ({ \ u16 __seg; \ - __asm__("movw %%" #SEG ", %w0" : "=r"(__seg) \ + __asm__("movw %%" #SEG ", %w0" : "=rm"(__seg) \ : "m"(__segment_ ## SEG)); \ __seg;}) |