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radeonsi: enable denorms for 64-bit and 16-bit floats

Browse source 
This fixes FP16 conversion instructions for VI, which has 16-bit floats,
but not SI & CI, which can't disable denorms for those instructions.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-02-05 22:49:12 +01:00
parent 17fe3fa312
commit 329181ae33
3 changed files with 29 additions and 6 deletions
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14
src/gallium/drivers/radeonsi/si_shader.c
View file

@ -4119,6 +4119,20 @@ int si_compile_llvm(struct si_screen *sscreen,
si_shader_binary_read_config(binary, conf, 0);
/* Enable 64-bit and 16-bit denormals, because there is no performance
* cost.
*
* If denormals are enabled, all floating-point output modifiers are
* ignored.
*
* Don't enable denormals for 32-bit floats, because:
* - Floating-point output modifiers would be ignored by the hw.
* - Some opcodes don't support denormals, such as v_mad_f32. We would
* have to stop using those.
* - SI & CI would be very slow.
*/
conf->float_mode |= V_00B028_FP_64_DENORMS;
FREE(binary->config);
FREE(binary->global_symbol_offsets);
binary->config = NULL;

18
src/gallium/drivers/radeonsi/si_state_shaders.c
View file

@ -124,7 +124,8 @@ static void si_shader_ls(struct si_shader *shader)
shader->config.rsrc1 = S_00B528_VGPRS((shader->config.num_vgprs - 1) / 4) |
S_00B528_SGPRS((num_sgprs - 1) / 8) |
S_00B528_VGPR_COMP_CNT(vgpr_comp_cnt) |
S_00B528_DX10_CLAMP(1);
S_00B528_DX10_CLAMP(1) |
S_00B528_FLOAT_MODE(shader->config.float_mode);
shader->config.rsrc2 = S_00B52C_USER_SGPR(num_user_sgprs) |
S_00B52C_SCRATCH_EN(shader->config.scratch_bytes_per_wave > 0);
}
@ -157,7 +158,8 @@ static void si_shader_hs(struct si_shader *shader)
si_pm4_set_reg(pm4, R_00B428_SPI_SHADER_PGM_RSRC1_HS,
S_00B428_VGPRS((shader->config.num_vgprs - 1) / 4) |
S_00B428_SGPRS((num_sgprs - 1) / 8) |
S_00B428_DX10_CLAMP(1));
S_00B428_DX10_CLAMP(1) |
S_00B428_FLOAT_MODE(shader->config.float_mode));
si_pm4_set_reg(pm4, R_00B42C_SPI_SHADER_PGM_RSRC2_HS,
S_00B42C_USER_SGPR(num_user_sgprs) |
S_00B42C_SCRATCH_EN(shader->config.scratch_bytes_per_wave > 0));
@ -203,7 +205,8 @@ static void si_shader_es(struct si_shader *shader)
S_00B328_VGPRS((shader->config.num_vgprs - 1) / 4) |
S_00B328_SGPRS((num_sgprs - 1) / 8) |
S_00B328_VGPR_COMP_CNT(vgpr_comp_cnt) |
S_00B328_DX10_CLAMP(1));
S_00B328_DX10_CLAMP(1) |
S_00B328_FLOAT_MODE(shader->config.float_mode));
si_pm4_set_reg(pm4, R_00B32C_SPI_SHADER_PGM_RSRC2_ES,
S_00B32C_USER_SGPR(num_user_sgprs) |
S_00B32C_SCRATCH_EN(shader->config.scratch_bytes_per_wave > 0));
@ -292,7 +295,8 @@ static void si_shader_gs(struct si_shader *shader)
si_pm4_set_reg(pm4, R_00B228_SPI_SHADER_PGM_RSRC1_GS,
S_00B228_VGPRS((shader->config.num_vgprs - 1) / 4) |
S_00B228_SGPRS((num_sgprs - 1) / 8) |
S_00B228_DX10_CLAMP(1));
S_00B228_DX10_CLAMP(1) |
S_00B228_FLOAT_MODE(shader->config.float_mode));
si_pm4_set_reg(pm4, R_00B22C_SPI_SHADER_PGM_RSRC2_GS,
S_00B22C_USER_SGPR(num_user_sgprs) |
S_00B22C_SCRATCH_EN(shader->config.scratch_bytes_per_wave > 0));
@ -381,7 +385,8 @@ static void si_shader_vs(struct si_shader *shader, struct si_shader *gs)
S_00B128_VGPRS((shader->config.num_vgprs - 1) / 4) |
S_00B128_SGPRS((num_sgprs - 1) / 8) |
S_00B128_VGPR_COMP_CNT(vgpr_comp_cnt) |
S_00B128_DX10_CLAMP(1));
S_00B128_DX10_CLAMP(1) |
S_00B128_FLOAT_MODE(shader->config.float_mode));
si_pm4_set_reg(pm4, R_00B12C_SPI_SHADER_PGM_RSRC2_VS,
S_00B12C_USER_SGPR(num_user_sgprs) |
S_00B12C_SO_BASE0_EN(!!shader->selector->so.stride[0]) |
@ -567,7 +572,8 @@ static void si_shader_ps(struct si_shader *shader)
si_pm4_set_reg(pm4, R_00B028_SPI_SHADER_PGM_RSRC1_PS,
S_00B028_VGPRS((shader->config.num_vgprs - 1) / 4) |
S_00B028_SGPRS((num_sgprs - 1) / 8) |
S_00B028_DX10_CLAMP(1));
S_00B028_DX10_CLAMP(1) |
S_00B028_FLOAT_MODE(shader->config.float_mode));
si_pm4_set_reg(pm4, R_00B02C_SPI_SHADER_PGM_RSRC2_PS,
S_00B02C_EXTRA_LDS_SIZE(shader->config.lds_size) |
S_00B02C_USER_SGPR(num_user_sgprs) |

3
src/gallium/drivers/radeonsi/sid.h
View file

@ -2845,6 +2845,9 @@
#define S_00B028_FLOAT_MODE(x) (((x) & 0xFF) << 12)
#define G_00B028_FLOAT_MODE(x) (((x) >> 12) & 0xFF)
#define C_00B028_FLOAT_MODE 0xFFF00FFF
#define V_00B028_FP_32_DENORMS 0x30
#define V_00B028_FP_64_DENORMS 0xc0
#define V_00B028_FP_ALL_DENORMS 0xf0
#define S_00B028_PRIV(x) (((x) & 0x1) << 20)
#define G_00B028_PRIV(x) (((x) >> 20) & 0x1)
#define C_00B028_PRIV 0xFFEFFFFF