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vkd3d-shader/hlsl: Make pre/post decrement generate a signed one.

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If a float expression is pre/post decremented and an unsigned one is
used to execute it, the unsigned one is first negated (becoming 2^32-1)
and then casted to float (becoming 2^32), which leads to an incorrect
result.

Signed-off-by: Giovanni Mascellani <gmascellani@codeweavers.com>
Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Matteo Bruni <mbruni@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Giovanni Mascellani
2021-12-01 17:15:00 +01:00
committed by Alexandre Julliard
parent c64627313f
commit 0e45838370
4 changed files with 15 additions and 2 deletions
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12
libs/vkd3d-shader/hlsl.c
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@@ -553,6 +553,18 @@ struct hlsl_ir_store *hlsl_new_simple_store(struct hlsl_ctx *ctx, struct hlsl_ir
return hlsl_new_store(ctx, lhs, NULL, rhs, 0, rhs->loc);
}
struct hlsl_ir_constant *hlsl_new_int_constant(struct hlsl_ctx *ctx, int n,
const struct vkd3d_shader_location loc)
{
struct hlsl_ir_constant *c;
if (!(c = hlsl_alloc(ctx, sizeof(*c))))
return NULL;
init_node(&c->node, HLSL_IR_CONSTANT, hlsl_get_scalar_type(ctx, HLSL_TYPE_INT), loc);
c->value[0].i = n;
return c;
}
struct hlsl_ir_constant *hlsl_new_uint_constant(struct hlsl_ctx *ctx, unsigned int n,
const struct vkd3d_shader_location loc)
{