For 0^0 case result of "LOG_CLAMPED ...,0" is -MAX_FLOAT, and then result of
"MUL_LIT ...,0,-MAX_FLOAT,..." is -MAX_FLOAT instead of 0 because of special
src1 checks for -MAX_FLOAT. So swap src0/1:
"MUL_LIT ...,-MAX_FLOAT,0,..." to get expected 0, then result of
"EXP_IEEE ...,0" is 1 as expected for LIT.
Signed-off-by: Vadim Girlin <vadimgir...@gmail.com>
---
src/gallium/drivers/r600/r600_shader.c | 11 +++++------
1 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/src/gallium/drivers/r600/r600_shader.c
b/src/gallium/drivers/r600/r600_shader.c
index f83d707..f3cbf98 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -1388,7 +1388,7 @@ static int tgsi_lit(struct r600_shader_ctx *ctx)
return r;
}
} else {
- /* dst.z = log(src.y) */
+ /* tmp.z = log(src.y) */
memset(&alu, 0, sizeof(struct r600_bc_alu));
alu.inst =
CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_LOG_CLAMPED);
r600_bc_src(&alu.src[0], &ctx->src[0], 1);
@@ -1404,13 +1404,12 @@ static int tgsi_lit(struct r600_shader_ctx *ctx)
chan = alu.dst.chan;
sel = alu.dst.sel;
- /* tmp.x = amd MUL_LIT(src.w, dst.z, src.x ) */
+ /* tmp.x = amd MUL_LIT(tmp.z, src.w, src.x ) */
memset(&alu, 0, sizeof(struct r600_bc_alu));
alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP3_SQ_OP3_INST_MUL_LIT);
- r600_bc_src(&alu.src[0], &ctx->src[0], 3);
- alu.src[1].sel = sel;
- alu.src[1].chan = chan;
-
+ alu.src[0].sel = sel;
+ alu.src[0].chan = chan;
+ r600_bc_src(&alu.src[1], &ctx->src[0], 3);
r600_bc_src(&alu.src[2], &ctx->src[0], 0);
alu.dst.sel = ctx->temp_reg;
alu.dst.chan = 0;
--
1.7.6
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