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vkd3d-shader/hlsl: Document some possibly obscure HLSL opcodes.

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Giovanni Mascellani 2023-09-12 17:30:55 +02:00 committed by Alexandre Julliard
parent f251da574c
commit ee28861837
Notes: Alexandre Julliard 2023-09-14 22:20:56 +02:00 
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/340
1 changed files with 6 additions and 1 deletions
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7
libs/vkd3d-shader/hlsl.h
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@ -550,8 +550,13 @@ enum hlsl_ir_expr_op
HLSL_OP2_NEQUAL,
HLSL_OP2_RSHIFT,
/* DP2ADD(a, b, c) computes the scalar product of a.xy and b.xy,
* then adds c. */
HLSL_OP3_DP2ADD,
/* TERNARY is used specifically for ternary operator, and later lowered according to profile to e.g. MOVC. */
/* MOVC(a, b, c) returns c if a is bitwise zero and b otherwise.
* TERNARY(a, b, c) returns c if a == 0 and b otherwise.
* They differ for floating point numbers, because
* -0.0 == 0.0, but it is not bitwise zero. */
HLSL_OP3_MOVC,
HLSL_OP3_TERNARY,
};