diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2015-10-02 14:26:41 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2015-10-14 16:16:24 -0400 |
| commit | c2fe16aa36d2bc976f7e79600d3a118fafdcc8dc (patch) | |
| tree | 79eb184bcc9e81769a6e3729bef187c6ef6b8e30 /drivers/gpu/drm/amd/amdgpu/atom.c | |
| parent | c9c145021f8fc8445fb07d16073696330b6186c8 (diff) | |
drm/amdgpu/atom: add support for new div32 opcodes (v3)
Better precision than the regular div opcode.
v2: drop 64 bit divide
v3: fix op handling. This actually is a 64 bit divide.
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/atom.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/atom.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c b/drivers/gpu/drm/amd/amdgpu/atom.c index 474357d019b2..1b50e6c13fb3 100644 --- a/drivers/gpu/drm/amd/amdgpu/atom.c +++ b/drivers/gpu/drm/amd/amdgpu/atom.c @@ -685,6 +685,27 @@ static void atom_op_div(atom_exec_context *ctx, int *ptr, int arg) } } +static void atom_op_div32(atom_exec_context *ctx, int *ptr, int arg) +{ + uint64_t val64; + uint8_t attr = U8((*ptr)++); + uint32_t dst, src; + SDEBUG(" src1: "); + dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1); + SDEBUG(" src2: "); + src = atom_get_src(ctx, attr, ptr); + if (src != 0) { + val64 = dst; + val64 |= ((uint64_t)ctx->ctx->divmul[1]) << 32; + do_div(val64, src); + ctx->ctx->divmul[0] = lower_32_bits(val64); + ctx->ctx->divmul[1] = upper_32_bits(val64); + } else { + ctx->ctx->divmul[0] = 0; + ctx->ctx->divmul[1] = 0; + } +} + static void atom_op_eot(atom_exec_context *ctx, int *ptr, int arg) { /* functionally, a nop */ @@ -1176,7 +1197,9 @@ static struct { atom_op_debug, 0}, { atom_op_processds, 0}, { atom_op_mul32, ATOM_ARG_PS}, { - atom_op_mul32, ATOM_ARG_WS}, + atom_op_mul32, ATOM_ARG_WS}, { + atom_op_div32, ATOM_ARG_PS}, { + atom_op_div32, ATOM_ARG_WS}, }; static int amdgpu_atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params) |