r600g: Use hardware sqrt instruction

Piglit quick tests including sqrt pass, no other regressions,
tested on radeon 6670.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c
index 5bf9c00..ee6a416 100644 (file)
--- a/src/gallium/drivers/r600/r600_pipe.c
+++ b/src/gallium/drivers/r600/r600_pipe.c
@@ -428,7 +428,7 @@ static int r600_get_shader_param(struct pipe_screen* pscreen, unsigned shader, e
        case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
                return 1;
        case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
-               return 0;
+               return 1;
        case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
        case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
        case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index db928f3..907547d 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -6498,8 +6498,7 @@ static struct r600_shader_tgsi_instruction r600_shader_tgsi_instruction[] = {
        {TGSI_OPCODE_SUB,       0, ALU_OP2_ADD, tgsi_op2},
        {TGSI_OPCODE_LRP,       0, ALU_OP0_NOP, tgsi_lrp},
        {TGSI_OPCODE_CND,       0, ALU_OP0_NOP, tgsi_unsupported},
-       /* gap */
-       {20,                    0, ALU_OP0_NOP, tgsi_unsupported},
+       {TGSI_OPCODE_SQRT,      0, ALU_OP1_SQRT_IEEE, tgsi_trans_srcx_replicate},
        {TGSI_OPCODE_DP2A,      0, ALU_OP0_NOP, tgsi_unsupported},
        /* gap */
        {22,                    0, ALU_OP0_NOP, tgsi_unsupported},
@@ -6693,8 +6692,7 @@ static struct r600_shader_tgsi_instruction eg_shader_tgsi_instruction[] = {
        {TGSI_OPCODE_SUB,       0, ALU_OP2_ADD, tgsi_op2},
        {TGSI_OPCODE_LRP,       0, ALU_OP0_NOP, tgsi_lrp},
        {TGSI_OPCODE_CND,       0, ALU_OP0_NOP, tgsi_unsupported},
-       /* gap */
-       {20,                    0, ALU_OP0_NOP, tgsi_unsupported},
+       {TGSI_OPCODE_SQRT,      0, ALU_OP1_SQRT_IEEE, tgsi_trans_srcx_replicate},
        {TGSI_OPCODE_DP2A,      0, ALU_OP0_NOP, tgsi_unsupported},
        /* gap */
        {22,                    0, ALU_OP0_NOP, tgsi_unsupported},
@@ -6888,8 +6886,7 @@ static struct r600_shader_tgsi_instruction cm_shader_tgsi_instruction[] = {
        {TGSI_OPCODE_SUB,       0, ALU_OP2_ADD, tgsi_op2},
        {TGSI_OPCODE_LRP,       0, ALU_OP0_NOP, tgsi_lrp},
        {TGSI_OPCODE_CND,       0, ALU_OP0_NOP, tgsi_unsupported},
-       /* gap */
-       {20,                    0, ALU_OP0_NOP, tgsi_unsupported},
+       {TGSI_OPCODE_SQRT,      0, ALU_OP1_SQRT_IEEE, cayman_emit_float_instr},
        {TGSI_OPCODE_DP2A,      0, ALU_OP0_NOP, tgsi_unsupported},
        /* gap */
        {22,                    0, ALU_OP0_NOP, tgsi_unsupported},