diff options
| author | Alejandro Piñeiro <[email protected]> | 2017-07-01 08:14:09 +0200 |
|---|---|---|
| committer | Jose Maria Casanova Crespo <[email protected]> | 2017-12-06 08:57:18 +0100 |
| commit | 82fa4d45e7f25f6773d4487ae93feebcf6183eeb (patch) | |
| tree | d4f906599dc803c863e120dd0b49ca3844a1b127 /src | |
| parent | d6cd14f2131a5b1c41ab777ef3ea041993de1c1b (diff) | |
i965/fs: Enable rounding mode on f2f16 ops
By default we don't set the rounding mode. We only set
round-to-near-even or round-to-zero mode if explicitly set from nir.
v2: Use a single SHADER_OPCODE_RND_MODE opcode taking an immediate
with the rounding mode (Curro)
v3: Use new helper brw_rnd_mode_from_nir_op (Jason Ekstrand)
Signed-off-by: Jose Maria Casanova Crespo <[email protected]>
Signed-off-by: Alejandro Piñeiro <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
Diffstat (limited to 'src')
| -rw-r--r-- | src/intel/compiler/brw_fs_nir.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/intel/compiler/brw_fs_nir.cpp b/src/intel/compiler/brw_fs_nir.cpp index ddc0c6d105e..d6ab2861478 100644 --- a/src/intel/compiler/brw_fs_nir.cpp +++ b/src/intel/compiler/brw_fs_nir.cpp @@ -621,6 +621,18 @@ emit_find_msb_using_lzd(const fs_builder &bld, inst->src[0].negate = true; } +static brw_rnd_mode +brw_rnd_mode_from_nir_op (const nir_op op) { + switch (op) { + case nir_op_f2f16_rtz: + return BRW_RND_MODE_RTZ; + case nir_op_f2f16_rtne: + return BRW_RND_MODE_RTNE; + default: + unreachable("Operation doesn't support rounding mode"); + } +} + void fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr) { @@ -724,6 +736,12 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr) inst->saturate = instr->dest.saturate; break; + case nir_op_f2f16_rtne: + case nir_op_f2f16_rtz: + bld.emit(SHADER_OPCODE_RND_MODE, bld.null_reg_ud(), + brw_imm_d(brw_rnd_mode_from_nir_op(instr->op))); + /* fallthrough */ + /* In theory, it would be better to use BRW_OPCODE_F32TO16. Depending * on the HW gen, it is a special hw opcode or just a MOV, and * brw_F32TO16 (at brw_eu_emit) would do the work to chose. |