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Support fma() in older GLSL targets.

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This commit is contained in:
Hans-Kristian Arntzen 2019-04-08 10:33:34 +02:00
parent 133ea8fd82
commit 3ca8bc5e0d
4 changed files with 49 additions and 1 deletions
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13
reference/opt/shaders/legacy/fragment/fma.legacy.frag Normal file
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@ -0,0 +1,13 @@
#version 100
precision mediump float;
precision highp int;
varying highp vec4 vA;
varying highp vec4 vB;
varying highp vec4 vC;
void main()
{
gl_FragData[0] = vA * vB + vC;
}

13
reference/shaders/legacy/fragment/fma.legacy.frag Normal file
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@ -0,0 +1,13 @@
#version 100
precision mediump float;
precision highp int;
varying highp vec4 vA;
varying highp vec4 vB;
varying highp vec4 vC;
void main()
{
gl_FragData[0] = vA * vB + vC;
}

11
shaders/legacy/fragment/fma.legacy.frag Normal file
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@ -0,0 +1,11 @@
#version 450
layout(location = 0) in vec4 vA;
layout(location = 1) in vec4 vB;
layout(location = 2) in vec4 vC;
layout(location = 0) out vec4 FragColor;
void main()
{
FragColor = fma(vA, vB, vC);
}

13
spirv_glsl.cpp
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@ -4818,7 +4818,18 @@ void CompilerGLSL::emit_glsl_op(uint32_t result_type, uint32_t id, uint32_t eop,
emit_unary_func_op(result_type, id, args[0], "degrees");
break;
case GLSLstd450Fma:
emit_trinary_func_op(result_type, id, args[0], args[1], args[2], "fma");
if ((!options.es && options.version < 400) || (options.es && options.version < 320))
{
auto expr = join(to_enclosed_expression(args[0]), " * ", to_enclosed_expression(args[1]), " + ",
to_enclosed_expression(args[2]));
emit_op(result_type, id, expr,
should_forward(args[0]) && should_forward(args[1]) && should_forward(args[2]));
for (uint32_t i = 0; i < 3; i++)
inherit_expression_dependencies(id, args[i]);
}
else
emit_trinary_func_op(result_type, id, args[0], args[1], args[2], "fma");
break;
case GLSLstd450Modf:
register_call_out_argument(args[1]);