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vkd3d-shader/hlsl: Fold constant integral abs().

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Signed-off-by: Ethan Lee <flibitijibibo@gmail.com>
This commit is contained in:
Ethan Lee 2023-05-08 13:21:37 -04:00 committed by Alexandre Julliard
parent dfa0076473
commit fb9328d030
Notes: Alexandre Julliard 2023-05-22 23:19:31 +02:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Francisco Casas (@fcasas)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/203
1 changed files with 44 additions and 0 deletions
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44
libs/vkd3d-shader/hlsl_constant_ops.c
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@ -22,6 +22,46 @@
#include "hlsl.h"
static bool fold_abs(struct hlsl_ctx *ctx, struct hlsl_ir_constant *dst, struct hlsl_ir_constant *src)
{
enum hlsl_base_type type = dst->node.data_type->base_type;
unsigned int k;
assert(type == src->node.data_type->base_type);
for (k = 0; k < 4; ++k)
{
switch (type)
{
case HLSL_TYPE_FLOAT:
case HLSL_TYPE_HALF:
dst->value.u[k].f = fabsf(src->value.u[k].f);
break;
case HLSL_TYPE_DOUBLE:
dst->value.u[k].d = fabs(src->value.u[k].d);
break;
case HLSL_TYPE_INT:
/* C's abs(INT_MIN) is undefined, but HLSL evaluates this to INT_MIN */
if (src->value.u[k].i == INT_MIN)
dst->value.u[k].i = INT_MIN;
else
dst->value.u[k].i = abs(src->value.u[k].i);
break;
case HLSL_TYPE_UINT:
dst->value.u[k].u = src->value.u[k].u;
break;
default:
FIXME("Fold abs() for type %s.\n", debug_hlsl_type(ctx, dst->node.data_type));
return false;
}
}
return true;
}
static bool fold_cast(struct hlsl_ctx *ctx, struct hlsl_ir_constant *dst, struct hlsl_ir_constant *src)
{
unsigned int k;
@ -533,6 +573,10 @@ bool hlsl_fold_constant_exprs(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr,
switch (expr->op)
{
case HLSL_OP1_ABS:
success = fold_abs(ctx, res, arg1);
break;
case HLSL_OP1_CAST:
success = fold_cast(ctx, res, arg1);
break;