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vtn/opencl: add clz support

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This is needed for OpenCL

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Dave Airlie 2019-11-18 17:04:35 +10:00
parent e3b21dfcb1
commit 7325f6ac98
2 changed files with 10 additions and 0 deletions
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8
src/compiler/nir/nir_builtin_builder.h
View file

@ -253,6 +253,14 @@ nir_select(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *s)
return nir_bcsel(b, nir_ieq(b, s, nir_imm_intN_t(b, 0, s->bit_size)), x, y);
}
static inline nir_ssa_def *
nir_clz_u(nir_builder *b, nir_ssa_def *a)
{
nir_ssa_def *val;
val = nir_isub(b, nir_imm_intN_t(b, a->bit_size - 1, 32), nir_ufind_msb(b, a));
return nir_u2u(b, val, a->bit_size);
}
#ifdef __cplusplus
}
#endif

2
src/compiler/spirv/vtn_opencl.c
View file

@ -185,6 +185,8 @@ handle_special(struct vtn_builder *b, enum OpenCLstd_Entrypoints opcode,
return nir_rotate(nb, srcs[0], srcs[1]);
case OpenCLstd_Smoothstep:
return nir_smoothstep(nb, srcs[0], srcs[1], srcs[2]);
case OpenCLstd_Clz:
return nir_clz_u(nb, srcs[0]);
case OpenCLstd_Select:
return nir_select(nb, srcs[0], srcs[1], srcs[2]);
case OpenCLstd_Step: