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r600g: Use clamped math for RCP and RSQ.

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This is likely only correct for OpenGL and not other state trackers.

Signed-off-by: Tilman Sauerbeck <tilman@code-monkey.de>
This commit is contained in:
Tilman Sauerbeck 2010-09-10 18:24:01 +02:00
parent 2108caac25
commit df62338c49
1 changed files with 14 additions and 2 deletions
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16
src/gallium/drivers/r600/r600_shader.c
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@ -1129,7 +1129,13 @@ static int tgsi_rsq(struct r600_shader_ctx *ctx)
int i, r;
memset(&alu, 0, sizeof(struct r600_bc_alu));
alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_RECIPSQRT_IEEE);
/* FIXME:
* For state trackers other than OpenGL, we'll want to use
* _RECIPSQRT_IEEE instead.
*/
alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_RECIPSQRT_CLAMPED);
for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
r = tgsi_src(ctx, &inst->Src[i], &alu.src[i]);
if (r)
@ -2633,7 +2639,13 @@ static struct r600_shader_tgsi_instruction r600_shader_tgsi_instruction[] = {
{TGSI_OPCODE_ARL, 0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_arl},
{TGSI_OPCODE_MOV, 0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV, tgsi_op2},
{TGSI_OPCODE_LIT, 0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_lit},
{TGSI_OPCODE_RCP, 0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_RECIP_IEEE, tgsi_trans_srcx_replicate},
/* FIXME:
* For state trackers other than OpenGL, we'll want to use
* _RECIP_IEEE instead.
*/
{TGSI_OPCODE_RCP, 0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_RECIP_CLAMPED, tgsi_trans_srcx_replicate},
{TGSI_OPCODE_RSQ, 0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_rsq},
{TGSI_OPCODE_EXP, 0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_exp},
{TGSI_OPCODE_LOG, 0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_log},