diff options
| author | Eric Anholt <eric@anholt.net> | 2010-12-07 12:34:30 -0800 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-12-07 13:13:27 -0800 |
| commit | fa0d5a2c5bfb6109d365a6f0b9bee53dfee50325 (patch) | |
| tree | ebdf71bb58e4ea5e563d52c9f90f76d751b79118 | |
| parent | 6d36be508ff0765beb6cf6bb95a323ff01e458dd (diff) | |
i965: Always hand the absolute value to RSQ.
gen6 builtin RSQ apparently clamps negative values to 0 instead of
returning the RSQ of the absolute value like ARB_fragment_program
desires and pre-gen6 apparently does.
Fixes:
glean/fp1-RSQ test 2 (reciprocal square root of negative value)
glean/vp1-RSQ test 2 (reciprocal square root of negative value)
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_emit.c | 2 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_fp.c | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c index 407358f498..184452666a 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_emit.c +++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c @@ -1958,7 +1958,7 @@ void brw_vs_emit(struct brw_vs_compile *c ) emit_math1(c, BRW_MATH_FUNCTION_INV, dst, args[0], BRW_MATH_PRECISION_FULL); break; case OPCODE_RSQ: - emit_math1(c, BRW_MATH_FUNCTION_RSQ, dst, args[0], BRW_MATH_PRECISION_FULL); + emit_math1(c, BRW_MATH_FUNCTION_RSQ, dst, brw_abs(args[0]), BRW_MATH_PRECISION_FULL); break; case OPCODE_SEQ: diff --git a/src/mesa/drivers/dri/i965/brw_wm_fp.c b/src/mesa/drivers/dri/i965/brw_wm_fp.c index 36330c134e..4759b289a0 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_fp.c +++ b/src/mesa/drivers/dri/i965/brw_wm_fp.c @@ -1131,6 +1131,11 @@ void brw_wm_pass_fp( struct brw_wm_compile *c ) precalc_lit(c, inst); break; + case OPCODE_RSQ: + out = emit_scalar_insn(c, inst); + out->SrcReg[0].Abs = GL_TRUE; + break; + case OPCODE_TEX: precalc_tex(c, inst); break; |