| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | glsl: move to compiler/ | Emil Velikov | 2016-01-26 | 1 | -228/+0 |
| | | | | | | | Signed-off-by: Emil Velikov <[email protected]> Acked-by: Matt Turner <[email protected]> Acked-by: Jose Fonseca <[email protected]> | ||||
| * | glsl: Improve precision of mod(x,y) | Iago Toral Quiroga | 2015-02-03 | 1 | -1/+1 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, Mesa uses the lowering pass MOD_TO_FRACT to implement mod(x,y) as y * fract(x/y). This implementation has a down side though: it introduces precision errors due to the fract() operation. Even worse, since the result of fract() is multiplied by y, the larger y gets the larger the precision error we produce, so for large enough numbers the precision loss is significant. Some examples on i965: Operation Precision error ----------------------------------------------------- mod(-1.951171875, 1.9980468750) 0.0000000447 mod(121.57, 13.29) 0.0000023842 mod(3769.12, 321.99) 0.0000762939 mod(3769.12, 1321.99) 0.0001220703 mod(-987654.125, 123456.984375) 0.0160663128 mod( 987654.125, 123456.984375) 0.0312500000 This patch replaces the current lowering pass with a different one (MOD_TO_FLOOR) that follows the recommended implementation in the GLSL man pages: mod(x,y) = x - y * floor(x/y) This implementation eliminates the precision errors at the expense of an additional add instruction on some systems. On systems that can do negate with multiply-add in a single operation this new implementation would come at no additional cost. v2 (Ian Romanick) - Do not clone operands because when they are expressions we would be duplicating them and that can lead to suboptimal code. Fixes the following 16 dEQP tests: dEQP-GLES3.functional.shaders.builtin_functions.precision.mod.mediump_* dEQP-GLES3.functional.shaders.builtin_functions.precision.mod.highp_* Reviewed-by: Ian Romanick <[email protected]> | ||||
| * | glsl: Update and fix typos in README. | Andres Gomez | 2014-10-16 | 1 | -8/+8 |
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| * | glsl: Update the notes on adding a new expression type. | Eric Anholt | 2012-08-07 | 1 | -1/+0 |
| | | | | | | Reviewed-by: Ian Romanick <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]> | ||||
| * | glsl: Explain file naming convention | Ian Romanick | 2010-09-13 | 1 | -0/+12 |
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| * | glsl: Add info about talloc and optimization passes to the README. | Eric Anholt | 2010-09-08 | 1 | -0/+26 |
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| * | glsl: Update README talking about multi-instruction operations. | Eric Anholt | 2010-09-08 | 1 | -4/+4 |
| | | | | | | | The previous thing taking multiple instructions ended up being handled at the IR level, as we suggested would be the common result. Pick a new one. | ||||
| * | mesa: Add new ir_unop_any() expression operation. | Eric Anholt | 2010-08-23 | 1 | -0/+1 |
| | | | | | | | | The previous any() implementation would generate arg0.x || arg0.y || arg0.z. Having an expression operation for this makes it easy for the backend to generate something easier (DPn + SNE for 915 FS, .any predication on 965 VS) | ||||
| * | glsl2: Update README for what I've been thinking about with expr types work. | Eric Anholt | 2010-07-01 | 1 | -1/+38 |
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| * | glsl2: Add a README file for the new compiler. | Eric Anholt | 2010-06-24 | 1 | -0/+153 |
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