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>
diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c b/drivers/gpu/drm/amd/amdgpu/atom.c
index 474357d..1b50e6c 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_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 @@
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)
diff --git a/drivers/gpu/drm/amd/amdgpu/atom.h b/drivers/gpu/drm/amd/amdgpu/atom.h
index a940eb3..fece8f4 100644
--- a/drivers/gpu/drm/amd/amdgpu/atom.h
+++ b/drivers/gpu/drm/amd/amdgpu/atom.h
@@ -60,7 +60,7 @@
#define ATOM_CT_PS_MASK 0x7F
#define ATOM_CT_CODE_PTR 6
-#define ATOM_OP_CNT 125
+#define ATOM_OP_CNT 127
#define ATOM_OP_EOT 91
#define ATOM_CASE_MAGIC 0x63