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| author | Alan Hayward <alan.hayward@arm.com> | 2018-05-31 14:36:48 +0100 |
|---|---|---|
| committer | Alan Hayward <alan.hayward@arm.com> | 2018-05-31 14:36:48 +0100 |
| commit | 122394f1476b1c925a281b15399119500c8231c1 (patch) | |
| tree | eeacb0f62658c8cf48d8b300b729090337b837b1 /gdb/arch | |
| parent | 95228a0d790f16deae3436e18f41b70fc711a5b2 (diff) | |
| download | gdb-122394f1476b1c925a281b15399119500c8231c1.zip gdb-122394f1476b1c925a281b15399119500c8231c1.tar.gz gdb-122394f1476b1c925a281b15399119500c8231c1.tar.bz2 | |
Function for reading the Aarch64 SVE vector length
Returns 0 for systems without SVE support.
Note the defines taken from Linux kernel headers
in aarch64-sve-linux-ptrace.h.
gdb/
* Makefile.in: Add new header.
* gdb/arch/aarch64.h (sve_vg_from_vl): New macro.
(sve_vl_from_vg): Likewise.
(sve_vq_from_vl): Likewise.
(sve_vl_from_vq): Likewise.
(sve_vq_from_vg): Likewise.
(sve_vg_from_vq): Likewise.
* configure.nat: Add new c file.
* nat/aarch64-sve-linux-ptrace.c: New file.
* nat/aarch64-sve-linux-ptrace.h: New file.
gdbserver/
* configure.srv: Add new c/h file.
Diffstat (limited to 'gdb/arch')
| -rw-r--r-- | gdb/arch/aarch64.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gdb/arch/aarch64.h b/gdb/arch/aarch64.h index b291a09..2f80a29 100644 --- a/gdb/arch/aarch64.h +++ b/gdb/arch/aarch64.h @@ -52,6 +52,23 @@ enum aarch64_regnum #define AARCH64_V_REGS_NUM 32 #define AARCH64_NUM_REGS AARCH64_FPCR_REGNUM + 1 +/* There are a number of ways of expressing the current SVE vector size: + + VL : Vector Length. + The number of bytes in an SVE Z register. + VQ : Vector Quotient. + The number of 128bit chunks in an SVE Z register. + VG : Vector Gradient. + The number of 64bit chunks in an SVE Z register. */ + +#define sve_vg_from_vl(vl) ((vl) / 8) +#define sve_vl_from_vg(vg) ((vg) * 8) +#define sve_vq_from_vl(vl) ((vl) / 0x10) +#define sve_vl_from_vq(vq) ((vq) * 0x10) +#define sve_vq_from_vg(vg) (sve_vq_from_vl (sve_vl_from_vg (vg))) +#define sve_vg_from_vq(vq) (sve_vg_from_vl (sve_vl_from_vq (vq))) + + /* Maximum supported VQ value. Increase if required. */ #define AARCH64_MAX_SVE_VQ 16 |