diff options
| author | Vadim Girlin <[email protected]> | 2011-07-06 05:29:08 +0400 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2011-07-08 17:21:32 -0400 |
| commit | 86f8b4117f35c788c8a043c2e241eb19eaacae8c (patch) | |
| tree | 79fd4ca2bef28b72342513634ea224398a3646a6 /src/gallium | |
| parent | 4df137691ee29bb812347fa2c5f19095243ede22 (diff) | |
r600g: LIT: swap MUL_LIT operands to fix 0^0
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 <[email protected]>
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | 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 f83d7079b29..f3cbf9807fd 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; |