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Added cast from half to real [skip ci]

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This commit is contained in:
Andrew Kane
2023-12-04 12:27:13 -08:00
parent 3b2198d52c
commit 4b630d4f27
5 changed files with 40 additions and 0 deletions
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6
sql/vector--0.5.1--0.6.0.sql
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@@ -46,6 +46,9 @@ CREATE FUNCTION half_negative_inner_product(half[], half[]) RETURNS float8
CREATE FUNCTION float4_to_half(real, integer, boolean) RETURNS half
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION half_to_float4(half, integer, boolean) RETURNS real
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION integer_to_half(integer, integer, boolean) RETURNS half
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
@@ -55,6 +58,9 @@ CREATE FUNCTION numeric_to_half(numeric, integer, boolean) RETURNS half
CREATE CAST (real AS half)
WITH FUNCTION float4_to_half(real, integer, boolean) AS IMPLICIT;
CREATE CAST (half AS real)
WITH FUNCTION half_to_float4(half, integer, boolean) AS IMPLICIT;
CREATE CAST (integer AS half)
WITH FUNCTION integer_to_half(integer, integer, boolean) AS IMPLICIT;

6
sql/vector.sql
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@@ -344,6 +344,9 @@ CREATE FUNCTION half_negative_inner_product(half[], half[]) RETURNS float8
CREATE FUNCTION float4_to_half(real, integer, boolean) RETURNS half
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION half_to_float4(half, integer, boolean) RETURNS real
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION integer_to_half(integer, integer, boolean) RETURNS half
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
@@ -355,6 +358,9 @@ CREATE FUNCTION numeric_to_half(numeric, integer, boolean) RETURNS half
CREATE CAST (real AS half)
WITH FUNCTION float4_to_half(real, integer, boolean) AS IMPLICIT;
CREATE CAST (half AS real)
WITH FUNCTION half_to_float4(half, integer, boolean) AS IMPLICIT;
CREATE CAST (integer AS half)
WITH FUNCTION integer_to_half(integer, integer, boolean) AS IMPLICIT;

13
src/half.c
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@@ -439,6 +439,19 @@ float4_to_half(PG_FUNCTION_ARGS)
PG_RETURN_HALF(h);
}
/*
* Convert half to float4
*/
PGDLLEXPORT PG_FUNCTION_INFO_V1(half_to_float4);
Datum
half_to_float4(PG_FUNCTION_ARGS)
{
half h = PG_GETARG_HALF(0);
float f = HalfToFloat4(h);
PG_RETURN_FLOAT4(f);
}
/*
* Get the L2 distance between half arrays
*/

12
test/expected/half.out
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@@ -76,6 +76,18 @@ SELECT 'Infinity'::real::half;
Infinity
(1 row)
SELECT '1.5'::half::real;
float4
--------
1.5
(1 row)
SELECT '{1.5}'::half[]::real[];
float4
--------
{1.5}
(1 row)
SELECT l2_distance('{0,0}'::half[], '{3,4}'::half[]);
l2_distance
-------------

3
test/sql/half.sql
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@@ -17,6 +17,9 @@ SELECT '65505'::integer::half;
SELECT 'NaN'::real::half;
SELECT 'Infinity'::real::half;
SELECT '1.5'::half::real;
SELECT '{1.5}'::half[]::real[];
SELECT l2_distance('{0,0}'::half[], '{3,4}'::half[]);
SELECT l2_distance('{0,0}'::half[], '{0,1}'::half[]);
SELECT l2_distance('{1,2}'::half[], '{3}'::half[]);